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9A0-702 exam Dumps Source : ColdFusion MX 7 Developer
Test Code : 9A0-702
Test Name : ColdFusion MX 7 Developer
Vendor Name : Adobe
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Adobe ColdFusion MX 7 Developer
Adobe ColdFusion 8Nick Walters added: “we will now acquire precise aspect as to which requests are taking the longest and which objects within a page are performing poorly. Server monitoring with Adobe ColdFusion eight is leaps forward of third-party purposes on the market.” Adobe ColdFusion eight allows developers to seamlessly integrate their Adobe ColdFusion purposes with other Adobe technologies such as Adobe Flex, PDF, Adobe integrated Runtime (AIR), and Adobe LiveCycle. Adobe ColdFusion eight additionally uses Ajax-based mostly add-ons, enabling developers to design and deploy engaging functions via integrating advanced environments into intuitive interfaces. “As an amusement business, supplying prosperous, dynamic amusement is primary.
Adobe ColdFusion 8 & Adobe Flex applicationsThe ease of integrating Adobe ColdFusion 8 and Flex applications skill that we will invariably supply valued clientele with attractive online capabilities that mix rich content material and crucial information,” spoke of Nolan Dubeau, artistic director of interactive functions and web advertising and marketing, XM Canada. “I really see us rewriting definite areas of our net website to combine Adobe Flex and Ajax with Adobe ColdFusion eight applications. Adobe has finished a ravishing job of providing a finished environment for developing and deploying engaging purposes.”
Adobe ColdFusion eight - elevated supportAdobe ColdFusion eight presents accelerated guide reminiscent of .net integration, Microsoft home windows Vista and JBoss aid, and integration with the newest edition of enterprise databases, giving companies better efficiency, interoperability, and scalability. “the brand new exchange and .net integration delivered to Adobe ColdFusion 8 provides surprising functionality. Adobe ColdFusion 8 allows for verbal exchange between much more styles of disparate methods, which changed into prior to now very difficult,” pointed out Nicholas Kwiatkowski, conversation techniques Analyst at Michigan State university. “With Adobe ColdFusion eight, we are able to improve applications totally quick and deploy them to purchasers with minimal lag and programming elements. The time reductions with Adobe ColdFusion eight is extra special.”
Adobe ColdFusion 8 - fee & AvailabilityColdFusion eight is obtainable in two variations: ColdFusion eight enterprise edition is a excessive-efficiency answer for offering distinct web sites and applications on one or more servers, or on current J2EE software server installations; ColdFusion 8 regular is a straightforward-to-manage configuration for single applications that's foremost for small to medium-sized organizations. business edition is attainable for $7499 per 2-CPUs, and ordinary edition is available for $1299 per 2-CPUs. ColdFusion may additionally even be used for development for gratis with the free Developer version, a full-featured server for development use most effective. special improve pricing is accessible to owners of valid ColdFusion MX 6 and 7 licenses. ColdFusion 8 is automatically attainable for buy online from the Adobe save, directly from Adobe, and through Adobe’s community of partners and resellers.
When it involves construction equipment, where is the trade headed? in this Slack chat, contributors of our Developer relations team weigh in with their suggestions.
there may be a lot of buzz within the trade round so-referred to as "low code" or "no code" or "high productivity" solutions. mainly, these equipment count upon a graphical consumer interface (GUI) to aid construct equipment with out code — sometimes even the usage of drag-and-drop interfaces to build functions. These sorts of tools have a protracted and a little sordid background amongst builders, which has led them to be slightly naturally distrustful of them.
several individuals of the growth Developer relations group determined to have a Slack chat dialogue to take a glance on the history of those tools and the place we suppose they're going. whereas (full disclosure) progress has a new device in construction that falls inside this category, we tried to take a good look from a developer point of view.
TJ VanToll: hello everybody!
This theme is humorous to me because when I begun my career as a front-conclusion developer, GUI equipment like Microsoft FrontPage and Adobe Dreamweaver had been critical utility used to construct serious stuff. however these days, these tools have fallen out of fashion (to assert the least), and most front-end tools are actually command-line- or terminal-based libraries. With that in mind, our rough agenda for today's dialogue is:
What GUI tools have we loved the use of over the years?
What GUI equipment have we now not enjoyed the usage of?
the place is the industry heading-more command-line tools, or the resurgence or GUI tools?
Let's beginning with the first query.
Rob Lauer: now not to this point myself, but the first GUI tool i can bear in mind using was the developed-in HTML editor that shipped as a part of Netscape!
TJ VanToll: OMG, Netscape had a developed-in HTML editor? Do images exist?
Rob Lauer: Netscape Composer I trust it turned into referred to as? It eventually became part of a monolithic Netscape distribution. hello, it could edit tables.
Rob Lauer: sure! ❤️
TJ VanToll: net page authoring is convenient! LOL on the "ABOUT computer systems" link.
Brian Rinaldi: i'll admit that I begun learning construction using all the GUI tools from FrontPage then to Dreamweaver and Flash and Director and eventually onto ColdFusion Studio. This tells you that: a) sure, i am historic; and b) I won't have a problem with GUI tools altogether.
in reality, i might say that I even have commonly struggled with the transition to command-line based mostly building
Jen Looper: i'm wondering a little bit in regards to the first sentence in TJ's opening statement. become Dreamweaver regarded a serious device, or changed into it a method for Adobe to onboard more people into their stack via the frontend?
I be aware the usage of Dreamweaver and Flash but the minute you unfolded the code to see what became happening, or the place bugs had been, it changed into a giant mass of spaghetti. I think this is a persistent difficulty with these tools. greater Dreamweaver than Flash, I feel.
Rob Lauer: Jen brings up a fine aspect — and the Achilles heel of those GUI equipment.
Brian Rinaldi: Jen, agreed. notwithstanding, here is where I think a distinction needs to be made. Some GUI equipment are drag and drop whereas others are more like an IDE with further tooling within the UI in preference to a command line interface. as an instance, you might use Dreamweaver as a full-on drag-and-drop device otherwise you may just use it in code mode.
Jen Looper: Flash became some thing else as well, it become a full studio to creator your entire animations, tweening, and everything. You variety of had to dive into ActionScript, although, on the conclusion of the day.
Rob Lauer: In defense of those tools, here is how I discovered HTML. I dragged and dropped a desk onto my canvas, then I switched to the code view to look what changed into basically generated. Composer (and...to additionally date myself...Adobe Pagemill) created very clean HTML that become effortless to read and gain knowledge of from.
Brian Rinaldi: I be aware the usage of Flash Builder (for Flex construction...and, sure, we've already covered that i am historic) and it had a drag-and-drop interface, which none of us often used.
Jen Looper: Getting misty-eyed over the theory of dragging and dropping tables...
Rob Lauer: > right click > add column. done!
Jen Looper: ultimate night, i used to be in this world just a bit, helping my daughter set up an internet site for a political campaign in our city. We needed to choose from Wix, SquareSpace, and Wordpress. no longer a touch of code in sight.
TJ VanToll: And did they work neatly?
Jen Looper: It came all the way down to $$$ — as in, we've none. So, Wix and SquareSpace went off the desk. also, we both have greater adventure with Wordpress and, honestly, it gets the job performed.
Rob Lauer: So, someplace, these tools went incorrect. i am considering of the .net 1.1 days with visual Studio.web and its drag-and-drop capabilities that would observe absolute positioning to all elements. magnificent for the internet...
TJ VanToll: FrontPage is doubtless essentially the most infamous for producing nonsense.
Rob Lauer: As app complexity ⬆️, code great ⬇️?
Jen Looper: might be they went wrong with the proliferation of browsers and screen sizes. it really is super complicated for these equipment to address.
Rob Lauer: genuine — sure kids, there turned into a day in case you had to sniff for IE vs Firefox vs Safari vs Chrome
Jen Looper: I be aware it smartly...
TJ VanToll: The only issue that surprises me about the above screenshot is that the tag names don't seem to be in all caps.
Brian Rinaldi: Adobe tried to resolve the drag-and-drop responsive design issue with area Reflow. I suppose they deserted it.
Rob Lauer: Adobe looks to have the most storied background, specially with the Macromedia acquisition.
Brian Rinaldi: it truly is the thing about full drag-and-drop equipment is that we've got seen so many of them fail over the years. or not it's like they eventually attain the upper restrict of their capability and once americans surpass that in terms of website/app complexity, the tool seems antiquated.
Jen Looper: I think the impetus at the back of these equipment is the deserve to immediately see what you're building. That has been solved these days with a nice, fast scorching module reloading (HMR). I just noticed a tweet about Gatsby + Sanity.io, which lets you have realtime collaboration and speedy previews. the realm is getting manner fancier.
Brian Rinaldi: sure, although the toolchain is getting advanced.
Jen Looper: For bound!!
the usage of webpack for my "hey world" app pic.twitter.com/MmnXTl0ebw
— Tomasz Łakomy (@tlakomy) February 20, 2018
TJ VanToll: The most effective up to date instance i will feel of a drag-and-drop device this is really respectable and usually liked is storyboards in Xcode. I consider it suggests which you could do drag-and-drop, but that it's actually hard and you have got to throw lots of engineering muscle at the problem to get it right.
Rob Lauer: So do the optimal tools get you eighty% of the way? Or are the optimal equipment folks that are very concentrated on selected initiatives?
Jen Looper: TJ, you are obliged to use these tools to build an Apple Watch app, for the Storyboard composition, last time i was working with this stack. That works first-rate, however you are truly locked into Xcode, then, if you need to free up that app.
TJ VanToll: Ah respectable factor. Lock in is a further regular downfall of those equipment.
Jen Looper: might be that plays into Rob's query. I feel lock-in is an issue for a various developer base.
Rob Lauer: The "enterprise" does not appear to have an issue with lock-in notwithstanding. maybe we deserve to differentiate between forms of builders. cough "citizen developer" cough
Jen Looper: genuine, actual!
Brian Rinaldi: i'd reply Rob's query by way of asserting that, in my event, the most excellent equipment admire the bounds of drag-and-drop and will let you go past that for those who should or are competent.
TJ VanToll: Agreed. Flash meets that criterion, as does Xcode.
Rob Lauer: I consider you are right as well.
Jen Looper: Ideally, you can comfortably access your code and or not it's readable. truthfully, Wordpress does that.
Rob Lauer: So, the superior device will get me 80 percent of ways, then let me take over. however is it a one-method street? many times generated code, this is because of this edited, cannot be re-edited in the long-established tool
Jen Looper: ��
Brian Rinaldi: I agree, though I consider that round-tripping constantly a problem with the whole drag and drop interface equipment.
To carry up an additional Adobe illustration, Flash Catalyst became going to be a way to design Flex/Flash application interfaces using drag and drop. each person wanted it except they definitely acquired it. the inability of round-tripping killed it out the gate (they eventually added it, but I believe in the end it became too constrained or too late).
Rob Lauer: Let me propose one a success implementation of this — albeit a just a little confined one, and intensely self-serving for the reason that this community. that would be NativeScript Playground. It gives drag-and-drop UI components, with code generation, however the "canvas" is your editor and your UI is reflected on the equipment. perhaps slightly outdoor of the scope of what we're speaking about although.
Brian Rinaldi: NativeScript? inform me greater!
Jen Looper: I in fact like that the code is right in front of you in NativeScript Playground, it's the focal point, no longer background.
Rob Lauer: So what GUI tools, in the past/current, had been/are at least commercially a hit? Dreamweaver? Xcode? Android Studio?
Brian Rinaldi: Dreamweaver is still round.
preliminary release: December 1997; 21 years ago
Jen Looper: I see Dreamweaver continues to be around, and i kind of need to are trying it once again.
TJ VanToll: curiously, a lot of these equipment do not make funds directly, however are attempting to support suck you into their ecosystem, as Jen outlined earlier. Xcode and Android Studio, for example, are free at least.
Rob Lauer: incredible aspect.
TJ VanToll: NativeScript Playground is free, too.
Brian Rinaldi: I consider that gets at your final query, TJ:
the place is the trade heading-extra command-line equipment, or the resurgence or GUI tools?
Rob Lauer: there is lots of pendulum swinging in tech. CLI changed into shunned for years, now in the closing 7-eight years, it's seen a resurgence. Now, might be, it be time for GUI equipment to take over once more..?
TJ VanToll: My notion for the front-end world peculiarly, things have gotten increasingly complicated over the remaining decade, which I suppose will make devs greater willing to make use of a device that hides a few of this complexity.
npm deploy... pic.twitter.com/c0YCG9Rk9f
- Glen Arrowsmith (@garrows) November 21, 2018
The latter appears to be notably targeting colossal agencies.
Jen Looper: i am brooding about this publish via Chris Coyier that I currently read about this new industry cut up between those that are 'UX Engineers' and people who are 'JS Engineers.' might be the formerise more more likely to use GUI equipment, and the latter command-line equipment.
The UX Engineers i know, although, appear to use Sketch for essentially the most half.
Rob Lauer: Ionic has had a smartly-bought (I count on) GUI device for years, first called Codiqa, then Creator, now Ionic Studio. I basically see some merits with it if you're a hybrid developer. however, IIRC you're restrained in the way you lay out your elements (stack best), which to me is a deal-killer. there's also no backend integration developed-in.
Jen Looper: Do tools like InVision permit you to seethe code?
Rob Lauer: I don't feel so, however this brings up the realm of design equipment -> code technology. Like going from Sketch to NativeScript or React Native focus on gruesome code generated...
Brian Rinaldi: those solutions are definitely being labored on.
Jen Looper: or not it's been executed within the group, I have not personally tried it.
Rob Lauer: The issue with these tools is commonly you are becoming absolute positioning of your facets. This leads to loads of added code and unnecessary complexity.
Jen Looper: taking a look at Sketch, it has a code export — I believe for things like SVG era, this may be super useful.
Rob Lauer: BuilderX is yet another instance — tremendous superb design interface, however the exported code is jammed with absolute facets. probably it be me, however I spend 50 percent of my time doing pixel-tweaking in my layouts.
Brian Rinaldi: Jen and i both worked at solar lifestyles and that i bear in mind there being a wide range of functions in the enterprise. Some were enormously advanced. Others solved smaller company issues, down to the basic "app" in-built entry or (yikes!) Domino that often simplest had a couple of users. So i can sort of take into account where these equipment, even from a no-code/citizen developer standpoint, have a spot inside a huge enterprise. it be no longer like you want a single tool to clear up your entire complications.
Jen Looper: I feel these equipment can shine once they support with small pieces of the UI, like an SVG or a canvas factor. should you predict that, in a single drag, just a few drops, and a click, that you've a totally responsive internet website, it is where the concern starts
Rob Lauer: So the "superior" GUI device should be one which makes me, as a developer more productive, leveraging my existing enterprise data retailers/functions, doesn't get in my means once I want to edit code, and lets me lower back right into a design canvas once I wish to add additional performance. whatever like that?
TJ VanToll: So there you've got it. GUI tools are the most beneficial and additionally the worst! Any closing words?
Jen Looper: Moonshot, Rob! I think we should still just go again to that Netscape composer
TJ VanToll: less complicated times.
Jen Looper: I consider these tools did help onboard loads of new americans into the trade returned in the day, and helped pushed the theory of 'first rate UI and UX' forward.
Brian Rinaldi: i might say, development, even just net building, nowadays is far larger and greater advanced than after I begun, which capability there is room for an entire range of options because there are only so many apps vital and being created. Devs should use whatever makes them most productive in what they must build.
Rob Lauer: Let me just conclusion this with asserting right here at development we are working on a brand new device that I think legitimately scratches all of those itches!
TJ VanToll: Spoiler alert!
TJ VanToll: neatly there you have got it. consider free to continue the conversation within the feedback with the equipment you've gotten enjoyed (and not enjoyed) the use of over the years. Oh, and when you are drawn to testing the tremendous-secret tools we have been engaged on right here at progress, listed below are the details:
soon we are going to be launching a brand new device to aid you make internet and mobile apps with Angular. that you can add custom chat bots and attach to business infrastructure, authentication, and other information sources without writing any code. Oh, and you may at all times have full control and the potential to alter the Angular source code. fascinated? Come construct extraordinary apps with us. join the invite checklist!
Rob Lauer: Adobe, if you are listening, carry back Pagemill!
Dreamweaver is gold standard known as a web design tool, nevertheless it can even be a pretty good device for web site management. gain knowledge of in regards to the tools built into Dreamweaver for just this intention during this chapter from Matthew Pizzi and Zak Ruvalcaba.
This chapter is from the booklet
in this Chapter
developing an internet web site in Dreamweaver MX 2004
Managing an internet site in Dreamweaver MX 2004
Working with the File Panel
Synchronizing local and remote data
Working with the web site Map
using web page experiences
Checking Browser Compatibility
one of the crucial crucial elements in Dreamweaver, or in any web production, is web page management. Dreamweaver excels at managing information on each the local and far off aspects. even if you might be an unbiased dressmaker/developer or one in a complete internet crew, Dreamweaver excels at file administration and corporation.
New to Dreamweaver MX 2004 is the capacity to work with files without needing to define a web page. furthermore, you can installation an FTP connection to the server, presenting you with the choicest flexibility. if you are seeking additional info on constructing an FTP or an RDS connection with out defining a site, confer with Chapter 1, "What's New in Dreamweaver MX 2004?"
it's important to word that this chapter offers complete counsel on managing a static web site, and sites containing middleware or database connectivity might be lined in future chapters. So if you are looking to beginning working on a static web page, study on.
one of the most important steps in web page administration is defining a website inside Dreamweaver. There are two how you can accomplish this, using either the simple web page Definition dialog box or the advanced Definition dialog box. each present an identical aspects; besides the fact that children, the fundamental version walks you through in a extra methodical method. The basic tab, as shown in determine 3.1, is much less cluttered than the advanced tab, proven in determine 3.2. developers new to Dreamweaver may also choose the primary tab, whereas the advanced tab offers facets and alternatives more suitable applicable to internet experts and seasoned Dreamweaver developers.
that you would be able to activate the website Definition dialog box in a few ways:
choose web site, control websites. This opens the manipulate websites dialog box. right here, click on the new button to set off the drop-down menu. in this menu opt for web site. This brings you directly into the new website Definition dialog box.
With the birth web page open, click the web page hyperlink towards the backside of the web page of the Create New column. This opens the site Definition dialog container.
From the files panel submenu, or fly-out, in the true-appropriate corner, choose site, New web page. This opens the website Definition dialog field.
figure 3.1 The simple web page Definition dialog field.
The local information category
in this chapter we are going to spend greater time looking on the superior tab and then give a recap of the simple tab. The superior tab is doubtless where most Dreamweaver builders will do nearly all of their web page definition. we will birth via searching on the local info category.
determine three.2 The superior site Definition dialog field.
The site name and native Root Folder
the primary element you need to do is name your website. here's with ease a means to locate the web page you might be defining inside Dreamweaver. Dreamweaver is an expert development tool, and since of that, it offers the potential to have a number of sites described at the identical time. The only means to differentiate between the different sites is to give each and every site a distinct name. This identify has nothing to do with the net web site, in terms of functionality or the rest. or not it's effortlessly a method to establish which web site you're working with in Dreamweaver at a specific aspect in time. spaces and special characters are appropriate here; youngsters, it is without doubt one of the few locations where they are applicable in net building.
Referring back to figure three.2, you will be aware that the next text container is to define a local root folder. The local root folder plays a key position in file administration and constitution. each file to your net web page should reside in the native root folder, unless it's completely linked to something in a different region. An absolute hyperlink is one that consists of the entire path to a specific vicinity on a web server. The reason that it plays this kind of pivotal function is the nature of an HTML doc. every thing in a web web page is hyperlinked by some means or a further, with the exclusion of a number of issues, akin to type.
it is additionally very essential as a result of at last the site that you are designing will go away your computer and be transferred to a web server someplace. Let's look at an HTML tag that sources a picture that could be positioned within the document. In determine 3.3, you are going to see that the supply is pointing to the photograph file, in line with its location—in this case, within my laptop. be aware how the img src tag is attempting to find a picture within my hard force. The difficulty with here's that once the site is moved from my desktop after which uploaded to an internet server, my hard power isn't relocating over the server with the relaxation of my site files. hence, when the HTML doc on the internet server sources an image on my complicated drive, it may not be capable of finding it. because my hard force isn't on the server, the outcome is a broken graphic hyperlink within the web browser, as proven in figure 3.four.
determine 3.three An HTML graphic source tag.
determine 3.four A damaged photograph hyperlink appears within the browser if the image is not sourced to whatever thing within a root folder or is not sourced with an absolute direction.
This instance is one illustration of the value of a local root folder. Your local root folder is sooner or later a reflect picture of your root folder to your internet server.
you could use both an present folder to your computing device otherwise you can create a brand new one. The top-quality approach to outline your native root folder is to click the folder icon to the right of the textual content container to launch the opt for native Root Folder dialog field proven in figure 3.5.
determine three.5 The opt for native Root Folder dialog box.
within the dialog box, spotlight the folder; on Macintosh, click choose, and on windows, click on the Open button, which then turns into a opt for button. This action defines the selected folder because the native root folder for this web page.
you'll also be aware that a investigate container in the dialog box presents the option to refresh the native file record immediately. when you've got this box checked, every time you add a file to your web page, the local file listing will automatically reflect that. in case you uncheck it, you'll boost efficiency; besides the fact that children, to see the changes, you will have to refresh the record manually. you could refresh the listing manually by using clicking the Refresh button on the information Panel toolbar, as proven in figure three.6.
until you have got a sluggish internet connection, i like to recommend leaving the Refresh local File automatically alternative checked.
Default pictures Folder
This text box is new to Dreamweaver MX. here is an easy way that Dreamweaver encourages web page corporation. This characteristic isn't best a time-saver, nonetheless it's a method to steer clear of broken image links. past in this chapter, I showed you a picture supply hyperlink to an image file on my complicated power. Now in Dreamweaver MX 2004, in case you select an image file outside your native root folder, Dreamweaver instantly places a replica within the default photographs folder and sources it from that area, maintaining all hyperlink integrity. if you are a long-time Dreamweaver user, that you can see the advantages of this new characteristic. if you're new to Dreamweaver, believe me—this characteristic is effortless.
figure 3.6 The Refresh button on the toolbar will refresh the native data in the web page panel.
HTTP handle and Cache
These alternatives are a little bit greater abstract than the outdated ones now we have just looked at. They are also now not as vital, however they can offer merits when used.
The HTTP tackle concerns most effective if you happen to use absolute addressing. when you are using absolute addressing, Dreamweaver makes use of this tackle when checking links for your website to verify whether the hyperlinks are sourcing exterior files or info inside your web site.
Cache offers speed enhancements when creating hyperlink updates. if you cache, the links are kept to your computing device's reminiscence, offering faster access, plenty like when a web web page is cached to your laptop—it would not take basically as long for the page to load inside your browser.
faraway information category
This component to the dialog container makes it possible for you to define properties of your remote site—in other words, your net server. the first aspect you should do is opt for how you hook up with your net server. The guidance you fill out right here will be used when connecting to the web server in the course of the site window. The entry drop-down menu offers many elements, each described in more element here.
the first choice is probably the most ordinary—FTP. FTP stands for File transfer Protocol. in case you choose FTP, an entire collection of alternate options are revealed, as shown in determine 3.7.
determine 3.7 After you opt for FTP from the drop-down menu, a lot of alternate options turn into accessible within the web site Definition dialog field.
FTP Host in this text container you are going to plug within the address to your web server. when you are paying a corporation to host your internet website, the company gives you the specific address to fill out in this textual content container. An FTP tackle can fluctuate in look, however frequently appears something like ftp.webserver.com; or the business could have an IP tackle, which looks like this: ftp.127.0.0.1. something the case, you are going to get the certain tips out of your host.
Host directory The textual content box presents the option of inserting a path to your public files on the server. Paths generally appear to be http://www.trainsimple.com/web1/htdocs, or whatever thing alongside these traces. consult with your internet administrator for the accurate advice. every so often, if this text field is left blank, it'll automatically connect to the appropriate area.
Login This box should still contain your username or login name for the net server. that is it, nothing particular.
Password This alternative is your password to gain access to the internet server. it is, despite the fact, critical to notice that many web servers are Unix primarily based, which makes your login and password case delicate.
Use Passive FTP reckoning on your community, you can be required to join through passive FTP. Passive FTP establishes a local software-based mostly connection, as opposed to a far off-server-based connection. confer with your network administrator to look how you'll want to be connecting if you're using FTP.
Use Firewall when you are in the back of a firewall, set the applicable port and host assistance in the Preferences dialog box. After filling that guidance out in Preferences, this option is instantly selected.
instantly add info to Server on keep I think this option explains itself; besides the fact that children, I don't advocate the use of it. What when you are experimenting? it's a little too harmful for me.
allow File sign in and take a look at i could talk about this choice in further detail a bit later during this chapter. What it does is permit you to sign in and check out information, which is a very good Dreamweaver function to make use of in case you have a couple of developer on your team. if you are the only 1, depart this choice unchecked.
The native community choice has fewer alternate options than FTP does, as proven in determine 3.8. This option is selected when you've got an internet server working to your local desktop or community. For this choice you enter the correct course and name of the root folder of the net server.
figure three.8 The native network category has best just a few alternate options.
This section of the web site Definition dialog field also has alternate options to enable sign in and check out, as well as instantly upload data to Server on retailer. a different choice from the old reveal offers you the means to refresh the far flung file record instantly. This choice is an identical as the local option in the FTP faraway info portion. Your connection to the server determines even if you want this checked.
be sure you use this choice if your host makes use of faraway construction functions (RDS). click the Settings button to specify a host name, Port, Host listing, person identify, and Password.
This choice may still be used in case you or your enterprise uses the collaborative internet-based mostly dispensed Authoring and Versioning standards.
testing Server category
This class is used only when constructing database-driven internet sites. in case you plan to create pages with middleware scripts, it's critical to fill this area out safely. As displayed in figure three.9, there are three alternatives—the server model, the class of pages the website will comprise, and the way you might be going to entry the software server—which ought to be filled out accurately. The trying out server class changed into new to Dreamweaver MX, however similar to the application server alternative in UltraDev 4.
The server mannequin drop-down container presents a few alternate options:
None select None in case you do not have any database connectivity or if you don't plan to create a web utility.
ASP.internet C# The options for ASP.web are akin to ASP. again, this has to do with the scripting language. counting on your knowledge of scripts, if you be aware of C# but now not visual fundamental .internet, the choice has been made for you. however, if you do not know both scripting language, opt for ASP.web C#. The potential to improve ASP.web net applications in a WYSIWYG atmosphere changed into a first in Dreamweaver MX.
ASP.net VB This option is corresponding to the previous one. in case you plan to construct a site using ASP.web with visual fundamental .web, here's a suitable option to opt for.
ColdFusion select this option if you plan to convey your internet functions with a ColdFusion server. This option allows for you to take full capabilities of the ColdFusion Markup Language.
JSP select JSP if you plan to boost pages that use JavaServer Pages (JSP) scripts.
personal home page MySQL Equally as enjoyable as constructing ASP.net internet purposes is the ability to create personal home page web purposes with a MySQL database. here is a crucial characteristic for any individual desperate to increase internet purposes or database-driven internet sites using open specifications.
figure 3.9 The testing Server class in the website Definitions dialog container.
This area of the checking out server class is identical for the far off data classes alternate options for FTP or native network connections to your software server.
Cloaking data hides the chosen files from the Get, Put, sign in, and take a look at options. as an instance, you may additionally have a folder containing your source data, corresponding to FLAs, PNGs, or even PSDs. These info don't need to be transferred to the net server. Any file format that you cloak will continue to be in your local folder and may now not be uploaded except you manually override the cloak setting. Cloaking hides info from right here operations:
besides these operations, the cloaked information will now not appear in the assets panel. that you can specify which file varieties you'll like to cloak by means of checking off the permit Cloaking assess container and checking the Cloak data Ending With choice. in the text container, category in the entire file extensions you would want to appear cloaked.
When typing within the extensions you'd like to cloak, do not separate the file extensions with commas or semicolons; separate them with spaces.
which you could additionally cloak a single file or folder, in spite of the extension. without difficulty spotlight the file or folder within the web page information and correct-click on (windows) or control+click on (Mac) to access the contextual menu. within the menu, opt for Cloaking, Cloak. After you opt for Cloak from the contextual menu, a crimson line seems through the icon of the file. which you can uncloak a file the equal means—by way of contextual-clicking and choosing Cloaking, Uncloak.
Design Notes class
The Design Notes class offers only a few facets, as shown in figure 3.10.
When setting up an internet site throughout several contributors and group individuals, it is crucial to retain every thing straight among the designers, coders, and content suppliers. here's why Macromedia in-built the Design Notes characteristic, to make this collaborative effort much less painful and to make verbal exchange less difficult among the quite a few group contributors. As you may have already been capable of accumulate from this first paragraph, design notes are premiere used when a couple of adult is engaged on a task.
Design notes can be connected to any doc created in Dreamweaver, as well as to any media inserted in a Dreamweaver doc.
determine three.10 The Design Notes class.
For design notes to be effective, every person involved within the building of the net web page has to be able to view essentially the most current edition of the design be aware. Dreamweaver allows you to maintain the design notes on the far flung server as a separate file. this way, the design notes are based info to the document. In determine three.10, you're going to word that you should set these alternate options within the Design Notes Preferences panel. this can additionally help you to eradicate unused notes as neatly.
website Map design
probably the most vital things in net construction is respectable usability and site structure. You need your web page navigation to be handy to consider. You don't need company combating navigation or fitting misplaced to your website. sometimes the challenge to a developer is to remember the structure you installation. Dreamweaver presents a website Map view, which allows you to peer not best the overall constitution of your website, however the file hierarchy as neatly. determine 3.11illustrates the distinctive alternatives purchasable within the site Map layout dialog field.
home page This text box appears for what goes to be the domestic page for your internet website. in case you won't have one yet, Dreamweaver instantly looks for index.html, index.htm, default.htm or default.html. If it finds a file named that means, it's going to use it because the domestic web page. For the map to create the file constitution, it needs a place to begin, and the starting factor for all net websites is the home web page.
number of Columns and Column Width These options assess how the map seems on a computer reveal. in case you need to print your map on a typical 8 1/2" with the aid of eleven" document, you'll have to cut back these numbers for the map to healthy on the web page.
Icon Labels This option determines how the icon should be displayed to your web page map. that you may opt for File Names or page Titles. I generally decide on the icons to display the filename. You link to files by means of identify, you open data by way of identify, it makes sense to monitor them with the name you interact with the most. besides the fact that children, in some instances the filenames may well be a bit of ambiguous. The titles are a greater accurate illustration of the page or file for which you are looking. in case you end up in a situation akin to that, you may also agree with using titles.
alternate options here that you would be able to come to a decision to monitor hidden HTML info by using deciding on reveal files Marked as Hidden. that you can choose to display dependent information in your web site map as well. data comparable to images, external scripts, and other styles of media will be displayed inside the map when this choice is checked.
figure three.11 The website Map layout class of the site Definition dialog field.
File View Columns
As that you can see in figure three.12, the File View Columns will alternate what and how info are displayed inside the site information window on the Mac or the web site information panel on windows.
figure three.12 The File View Columns category within the site Definition dialog box.
during this portion of the define websites dialog container, you have the option of unveiling or hiding probably the most predefined columns. You could want to cover one of the columns because their meanings don't pertain to the selected challenge that you simply're engaged on. You also can create your personal custom columns. this may turn into essential, reckoning on the undertaking you're engaged on. If some of the sites you're engaged on has to fulfill accessibility instructions, as an instance, that you may create a column titled "purchasable" and fill that column out with a sure or a no. this can permit you to variety by using the available column and you will straight away be capable of observe which pages are available and which of them are not.
creating a customized Column
during this activity, i go to walk you through growing your own customized columns step-by-step, and you will see a way to enter counsel into those columns.
select web site, control websites to open the control websites dialog container.
in the manipulate sites dialog field, highlight the site you need to edit by clicking it. With the identify of the web page highlighted, click the Edit button. This launches the site Definition dialog box.
in the web page Definition dialog field, click the superior tab, if it isn't already selected, to reveal the web site Definition dialog container in the advanced view. be aware the class part on the left.
in the category section, click on the File View Columns section. This causes the site Definition dialog box to display alternatives for the File panel.
click the plus signal beneath the File View portion of the dialog container to get a brand new column labeled Untitled.
toward the backside component of the dialog container, there are some text fields in which which you can relabel the identify of the column and specify what to associate that column name to in the design notes.
within the Column name text container, classification in the note Accessibility. After typing the notice, press the Tab key in your keyboard to stream to the area. observe that after you press the Tab key, the identify of the column appears within the listing above and you now have a blinking cursor in the associate with Design word textual content container.
within the associate with Design notice container, that you can either enter a custom cost, or you can choose from one of the vital defaults within the drop-down menu. For this circumstance, you're going to create a customized cost. within the text box, type in the note Accessibility. Press the Tab key to practice this cost.
choose an alignment in the Align drop-down menu. The default is Left, and for this goal, that will be just first-rate. until, of route, you want to exchange it—then feel free.
in case you need to reorganize how the columns appear, with respect to their alignment from left to correct, the column within the accurate of the checklist will seem nearer to the aligned side that you selected within the old step.
You need Accessibility to appear after the name column. To get this effect, spotlight the Accessibility column identify in the File View Columns section of the dialog container. With it chosen, press the up arrow in the right corner as many times as integral except it seems under the name column. note that you just can't area anything above the name column. The name column at all times appears first.
in the event you're chuffed with the name and placement of your new column, click on the adequate button. This brings you back to the control websites dialog container, where that you would be able to click the carried out button. After you click achieved, you come back to Dreamweaver.
notice in figure three.13, the Accessibility column seems subsequent to the identify column in the File panel when increased.
determine three.13 observe the Accessibility column within the File panel.
you will, despite the fact, notice that no values appear within the new column area. within the subsequent recreation, you will see the right way to add values to that column.
entering suggestions into a custom Column
This activity suggests you the indispensable steps so as to add values into custom columns.
appropriate-click on (home windows) or control+click (Mac) the filename of 1 of the files internal the increased view of the File panel. This presents access to a contextual menu.
in the contextual menu, opt for Design Notes. This launches the Design Notes dialog box.
With the Design Notes dialog box open, click the All data tab and enter the records for the column you are looking to populate with information. After you could have complete getting into the statistics, click adequate.
internal the File panel, note in the Accessibility column that the text "sure" suggests up, as proven in determine three.14.
there is one other way to add or trade the content in a selected column. within the File panel, double-click to place an insertion element, which will will let you classification in any value you need.
make a contribution
you probably have Macromedia make a contribution put in on the identical computing device, you will additionally get a make a contribution class. This class offers an option to work in Dreamweaver in a means that is appropriate with make contributions. when you are working with make contributions, be certain to opt for this category and select the only alternative, which is permit make contributions Compatibility.
figure 3.14 The Accessibility column now contains a worth of sure.
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ColdFusion MX 7 Developer
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The release of ColdFusion MX 7 provides developers with several options for deploying their CFML applications. While the current option of using ColdFusion Archives (CAR files) has worked to this point, a fundamental problem still remains that the source code needed to be included.
However, the two new options available in this release, sourceless and EAR/WAR file deployment, truly give developers the flexibility to deploy their code while optionally preserving their valuable intellectual property. (It is important to note that New Atlanta's BlueDragon Server line has supported sourceless deployment of CFML source code since the introduction of their 6.1 product line in June 2004. All references to sourceless and EAR/WAR deployments as "new features" apply solely to Macromedia ColdFusion MX 7.) Coupled with the streamlined ability to add new ColdFusion instances to an environment via the ColdFusion MX Administrator (Enterprise edition only), much of the manual work associated with application deployment has been automated, allowing the developer to focus on development instead.
Pre-compiled and Sourceless DeploymentBefore ColdFusion MX 7, the only option for companies to protect their commercial CFML code distribution was the cfencode utility. However, anybody who has worked with ColdFusion for any reasonable amount of time knows that a simple Internet search will turn up a utility for decompiling the templates, which essentially rendered cfencode pointless. So for many years, all a developer could realistically do was release their code to the public and simply hope that the end user would abide by the license agreement. Further, many companies, not just those selling commercial applications, simply weren't comfortable running production applications without some sort of source code protection.
ColdFusion MX 7 ships with a new cfcompile utility that has two main uses. First, it can be used to simply compile your ColdFusion source code into the resulting Java class files so that the initial load time is quicker. Second, it allows for pre-compiling CFML code (CFM, CFC, and CFR templates) to Java byte code, which can then be deployed without the source templates. This utility, which can be found in the cfroot/bin (for the server configuration) and in the cf_webapp_root/WEB-INF/cfusion/bin (for the multi-server and J2EE configuration) directory, can be run on one template (i.e., a custom tag) or an entire directory structure containing a complete CFML application (i.e, a blogging application).
In both cases, its usage is incredibly simple. To pre-compile CFM, CFC, and CFR templates (note that this is not for sourceless deployment, which will be covered shortly), the general usage is
cfcompile webroot [directory-to-compile]
where webroot is the absolute path to the site's web root and the directory-to-compile is an optional parameter specifying the directory to compile (Note: all sub-directories are automatically compiled as well). If no directory is specified, the utility will compile all CFM, CFC, and CFR templates from the web root, recursively. This usage of cfcompile is the same process that the ColdFusion runtime uses when first loading a page: it parses the file, compiles it, and stores the appropriate class files in the cfclasses directory under your ColdFusion installation. For a small set of files, this might not seem very useful due to the massive compiler optimizations that the ColdFusion MX runtime has received since its first release. However, for large sites, this initial overhead savings could prove valuable.
As an example, the Mach-II framework files are used as the directory structure (the freely available code is located at www.mach-ii.com/code.cfm). Assuming that the web root is C:\Inetpub\wwwroot, the following command-line statement would pre-compile all the templates in the framework:
cfcompile C:/Inetpub/wwwroot C:/Inetpub/wwwroot/MachII
As seen in Figure 1, the forty templates comprising the base framework were compiled in 5.36 seconds. Figure 2 shows the resulting class files in Windows Explorer. A count of the number of resulting class files output shows that 345 files were generated for a total directory size of just over 1 MB (remember, the number of compiled class files is not one-to-one with the number of ColdFusion templates. ColdFusion Components, for example, have their methods broken out into individual class files). Running this utility has just saved the ColdFusion runtime from having to generate over 300 files when they are first loaded!
The second use of this utility lies in its ability to pre-compile templates for sourceless deployment. What this means is that applications can now be distributed without the underlying source code and without the fear that a vendor's intellectual property will be compromised. The general usage is
cfcompile -deploy webroot directory-to-compile output-directory
Once again using the Mach-II core file distribution, the sourceless deployment syntax is
cfcompile -deploy C:/Inetpub/wwwroot C:/Inetpub/wwwroot/MachII
The major usage difference is the presence of the "-deploy" switch that tells the cfcompile utility to compile the CFML source code to Java byte code. Further, the output-directory is required since the resulting files will still have the same name and file extension as the source files. Once this process is done, it is simply a matter of backing up the original CFML source code and copying the generated byte code templates into the original directory. That's it! You now have a copy of the Mach-II framework that can be run without the original source code!
EAR/WAR DeploymentWhile the cfcompile utility satisfies the long-standing enhancement request for protection of source code, it does not answer the other request that applications be easier to deploy. ColdFusion MX has been a pure J2EE application since its initial release. A traditional J2EE application is bundled as a EAR (Enterprise Application Archive) or a WAR (Web Application Archive) file. At companies that run a pure J2EE environment, system administrators simply take the EAR/WAR file and drop it into the J2EE instance. However, traditional ColdFusion deployments meant that a server first had to be installed (the ColdFusion runtime) and then the CFML source code installed separately. This did not sit well with system administrators, who felt this two-step process was awkward, and hence limited ColdFusion's adoption in those environments.
To solve this disconnect, ColdFusion MX 7 introduces the option of packaging CFML applications as a EAR or WAR file so that one file can be handed off to the system administrator for deployment. This option means that deployment and management is easier for the system administrator while subsequently allowing ColdFusion to be a viable development alternative when building J2EE applications. Found under the "Packaging & Deployment" section in the ColdFusion MX Administrator (Enterprise version only), the "J2EE Archives (.ear/.war)" option provides a variety of options such as whether or not to include the source code or whether or not to include the ColdFusion Administrator. Figure 3 shows an example of bundling the Mach-II framework into a WAR file (MachII.war).
Having created your EAR or WAR file, it is now literally as easy as sending the resulting file to your system administrator for deployment - no separate server installation is needed!
J2EE Instance ManagementRunning ColdFusion on multiple instances has many benefits such as application isolation, greater stability, and greater scalability (for more information on the benefits of multiple J2EE instances, see Ben Forta's July 2003 CFDJ article entitled "When One ColdFusion Is Not Enough" at http://sys-con.com/story/?storyid=42050&de=1). Before the release of ColdFusion MX 7, the creation of new J2EE instances in which ColdFusion server would be deployed (remember, ColdFusion MX is simply a standard Java application deployed into a J2EE server) left a lot of additional setup work for administrators. From a separate interface for actually creating the instance (i.e., the JRun Admin console) to the manual editing of the underlying XML configuration files (to get features such as session replication properly working), creating a new instance was too tedious of a process, and one that caused many administrators to forgo the feature.
Recognizing this barrier to multiple instance deployment adoption, Macromedia has included a new feature in the ColdFusion Administrator for creating new J2EE servers with no more than a couple of mouse clicks (Note: this feature is only available if the integrated JRun + ColdFusion option was selected while running the installer. Macromedia did not back-port this option for existing JRun installations.) Found in the ColdFusion MX Administrator under the "Enterprise Manager" navigation bar heading, setting up a new J2EE instance really could not be any easier. From the main screen, simply click the "Add New Instance" button. As seen in Figure 4, only a few pieces of information are needed for ColdFusion to create the new instance.
The "Server Name" field is required, as this is the name of the J2EE instance. The next two fields are optional. The "Server Directory" field (which is automatically filled in based on the "Server Name" value filled in) is where the instance will reside on the file system. The "Create From EAR/WAR" option is where the EAR/WAR packaging feature mentioned previously really shines. Remember the MachII.war file created earlier that had the ColdFusion runtime bundled with it? Well, if it needs to de deployed to a separate instance, point to the WAR file created and the Manager will deploy the ColdFusion runtime from the bundled archive. If the JRun installation is on a Windows server, there are also options to create the new instance as a Windows service and to define the service with an auto restart recovery option. Clicking the "Submit" button will start the process of installing the new instance, deploying the ColdFusion server within it, optionally deploying the application to run within it, and starting the instance. When everything is complete, the screen will look similar to Figure 5 below:
It is important to realize that the setup of a J2EE instance and the subsequent deployment of ColdFusion MX within it require a lot of files to be laid down. Therefore, it might be tempting to think that the process is not responding. Rest assured that the process is indeed running under the hood and simply take several minutes to complete.
Licensing and Other RestrictionsThe pre-compile and sourceless deployment licensing and restrictions are pretty straightforward. The ability to run applications without the source code is only compatible with ColdFusion MX 7 installations - it is not backwards compatible with ColdFusion MX 6.1 and earlier. That being said, the ability to both compile and run applications without the source code is available across all editions of the ColdFusion MX 7 product line - Developer, Standard, and Enterprise. This means that you do not have to have an Enterprise license to compile your application for Enterprise customers.
The EAR/WAR deployment option is a little trickier. First off, the ability to create the package is available in any edition of ColdFusion MX 7. However, because EAR/WAR files can only be deployed to J2EE servers, ColdFusion MX 7 Enterprise is the only edition that supports the deployment of these packages. (This deployment restriction is consistent with New Atlanta's BlueDragon product line, as seen at www.newatlanta.com/products/bluedragon/product_info/features.cfm#FCMatrix) Further, deploying an EAR or WAR package requires the purchase of ColdFusion MX 7 Enterprise licenses to match the number of CPUs on the deployment server. For example, if the package is being deployed to a 4-CPU server, then a 4-CPU Enterprise license of ColdFusion MX is required. (Note that Macromedia has changed its server licensing policy with the release of ColdFusion MX 7 such that a 2-CPU license can no longer be split across two 1-CPU machines. Each physical server now requires a separate license. Further, the licensing is based on the number of physical processors in the server only.) If a serial number is not applied when the EAR/WAR package is first created, then either the ColdFusion Administrator must be included with the package, or the Administrator API must be used so that the user can apply their license upon deployment (See the Macromedia LiveDocs for more information on the Administrator API). If the Administrator is not included and no serial number is applied via the Administrator API, the application is deployed as a 30-day trial that reverts to the Developer version upon expiration (which is restricted to localhost access plus 2 client machines).
While seemingly a hassle on the surface, the EAR/WAR deployment option is still much easier than previous versions' deployment experience. As an example, if a company wanted to purchase a bug tracking system with ColdFusion, that company would have to do the following using pre-MX 7:
Buy the bug tracking system application itself
Purchase ColdFusion and the appropriate number of licenses
Install ColdFusion server
Deploy the bug tracking system to the new server
With ColdFusion MX 7's EAR/WAR packaging option, that same company would have to do the following:
Buy the bug tracking system with the ColdFusion runtime bundled as one cost
Purchase and apply the appropriate number of ColdFusion licenses
Much simpler, isn't it?
The Enterprise Manager feature for creating new J2EE instances is limited to the Enterprise edition. However, because the licensing is a "per CPU" agreement, there is no limit to the number of instances that can be created. Further, the Instance Manager can only create instances on the same server from which the ColdFusion MX Administrator is installed as opposed to across a network to another installation.
SummaryAfter years of developer demand, Macromedia has come through with an intelligent, straightforward way to confidently deploy CFML applications. The cfcompile utility improves initial template load time and gives a developer confidence that the innovation and hard work that they have put into a product will not be compromised while the ability for ColdFusion to be packaged up into one clean installation step opens it up to an increased number of companies who previously would have shunned the idea because of the fragmented install process. The J2EE Instance Manager vastly simplifies this process because system administrators now simply have to click a few buttons as opposed to running several installers.
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Building High Performance Applications with ColdFusion 9 and Ehcache 2.4 Take a look around at any high performance website such as Facebook or Twitter, and regardless of the operating system, application server, programming language or database it’s built on there’s one thing you can be fairly certain of – the extensive use of caching. Regardless of how fast your sharded and clustered MySQL database is or how sweet your NoSQL backend, caching can provide a performance boost, often one or more orders of magnitude faster than you could ever achieve without it.
Implementing caching in Adobe® ColdFusion® 9 is simple and easy. When Adobe released ColdFusion 9.0, they included a stand-alone version of Terracotta’s Ehcache (version 2.0 to be specific). If you’re not familiar with Ehcache, it’s widely considered the de-facto caching solution for Java applications. It comes in both open source and commercial versions with varying levels of capability and support.
In-Process vs. Out-of-Process Cache
ColdFusion 9 ships with the core open source version of Ehcache embedded. By default the cache is configured as a single node and runs in the same JVM process as your ColdFusion server. This is known as an in-process or L1 cache. Because both ColdFusion and Ehcache share the same JVM container, they also share the same memory allocation. In many instances, this is fine. However, there’s a limit to how much scalability you can expect from an in-process cache.
It’s also possible to configure Ehcache to run in distributed mode. In distributed mode, an L2 cache called the Terracotta Server is added that runs out-of-process in its own JVM. Typically the L2 cache is installed on a separate server from your application and L1 cache. There are two flavors of the Terracotta Server: open source and commercial. The open source version of Terracotta is limited to one active and one passive node. The commercial version, known as the Terracotta Server Array, lets you scale your cache out by adding additional nodes to your out-of-process L2 cache. The result is a single virtual cache made up of multiple physical nodes. Terracotta server arrays are easily capable of scaling to multiple terabytes in size.
When configured in distributed mode, Ehcache employs a tiered caching architecture where the L2 cache contains the full set of cached data while the L1 cache that’s local to your application has a tunable subset of the most frequently accessed cache items. Cache access patterns tend to follow the Pareto principle: 80% of the requests to your cache can be served by 20% of the items in the cache. Given this, Ehcache’s tiered architecture would suggest having your L1 cache sized such that it contains about 20% of the data in your L2 cache. Ehcache automatically determines which data should be stored in L1 by employing a Least Recently Used (LRU) algorithm.
This is one of the big differentiators between between Ehcache with Terracotta and other purely distributed caching systems such as MemcacheD or the so called NoSQL databases. In a purely distributed cache, network latency contributes to overall retrieval time in excess of 1 millisecond. In Ehcache’s case, however, items from the L1 cache are retrieved in less than 1 microsecond while items from the L2 cache are retrieved in fewer than 2 milliseconds. That’s an overall performance difference of an order of magnitude between Ehcache and purely distributed caching systems.
Using the Pareto distribution, that means that 80% of the requests to your cache will come from the L1 cache and be returned in under 1 microsecond. The other 20% of requests will go to the out-of-process L2 cache and still be returned in less than 2 milliseconds.
In scenarios where you require redundancy for load balancing or high availability, Ehcache supports replicated caching across all versions of both their in-process and out-of-process cache configurations. This lets you cluster your caches and ensures that changes on one cache node are automatically replicated to all other nodes in the cluster. The replication mechanism is configurable to allow for popular options such as RMI, JMS, JGroups, and more.
Now that you have a better idea of how Ehcache is architected, let’s take a look at upgrading the version of Ehcache that ships with ColdFusion 9 as well as installing and configuring a Terracotta server so we can build out a high performance cache.
Upgrading ColdFusion 9 to Ehcache 2.4 and Installing the Terracotta Server
Before we go further, you’ll need to upgrade ColdFusion’s version of Ehcache from 2.0 (that ships with ColdFusion 9.0.1) to the latest version, currently 2.4.1. While this isn’t a complicated task per se, it does involve downloading multiple sets of files from different projects, and it also comes with a caveat. Although Terracotta (the makers of Ehcache) does their best to maintain backward compatibility, there is no guarantee that replacing the version of Ehcache that ships with ColdFusion with the latest and greatest version is going to work. There shouldn’t be any problems, but if there are, Adobe will not provide support as they only certify the version of Ehcahe that they ship with ColdFusion. That said, I’ve upgraded my version of Ehcache several times now and have encountered no issues along the way.
Since we’re going to be replacing Ehcache related files that ship with ColdFusion 9 with updated versions, the first thing we need to do is make backups of the original files. Rather than delete the files or move them somewhere else, I like to rename them in place in case I need to revert back to them later. First, stop your ColdFusion server service. Next, locate your /lib directory. The location will vary depending on whether you’re running the stand-alone or multi-instance versions of ColdFusion. For standalone, the directory is:
For multi-instance, it’s:
Here’s you’ll find four files we’re interested in:
As I mentioned, I generally don’t like to delete these files just in case. What I do is simply rename them with a “.original” extension so that Ehcache.jar becomes ehcache.jar.original. That way, there’s no confusion over what the original filename or extension originally was.
For the next set of steps, you’ll need the latest build of the Terracotta Kit. The Terracotta Kit contains Terracotta 3.5.0, Ehcache 2.4.1 and Quartz Scheduler 2.0.0. We’ll be focusing on Terracotta and Ehcache in this article. You can find the Terracotta Kit on the Terracotta website:
There are multiple versions of the kit available. For our purposes, download terracotta-3.5.0.tar.gz. Once you have the file on your local system, unzip and untar it. You should see a directory structure like the one below:
Navigate to the /lib directory and extract the following files into your ColdFusion /lib directory:
Next, you’ll need to extract terracotta-toolkit-1.2-runtime-3.0.0.jar from /common into your ColdFusion /lib directory.
Extract the entire /terracotta-3.5.0 directory from the archive and place it whereever you usually install programs. In my case, on a 64-bit Windows 7 machine, I put the files in c:/program files/terracotta/terracotta-3.5.0. This way, if I want to work with multiple versions of the Terracotta server, I have a single location where I can keep them all organized. In a production environment you typically wouldn’t run the Terracotta on the same physical server as your application server. Part of the draw to distributed caching is that you can distribute your cache to other physical resources on your network as necessary to achieve horizontal scale. For the purposes of development, however, running the Terracotta server on the same machine as your application server will due fine.
You’ll also want to upgrade the ehcache-web.jar file in your ColdFusion /lib directory. This file needs to be downloaded separately and can be found in the ehcache-web-2.0.3-distribution.tar.gz package on the Terracotta website: http://www.terracotta.org/dl/ehcache-oss-download-catalog. The file you want to extract is ehcache-web-2.0.3.jar.
Finally, you’ll need to download updates to SLF4J, a java logging facade that’s used by Ehcache and the Terracotta server. You can download the necessary JAR file from their website. Note that version 1.6.1 is what you want for Terracotta 3.5.0/Ehcache 2.4.1:
Once you have the SLF4J jar file, extract the following files and place them in your /lib directory:
That’s it, the upgrade is complete. Go ahead and restart your ColdFusion server.
ColdFusion implements two types of caching with Ehcache: template and object. Template caching lets you cache page fragments or entire web pages. The template cache is fairly well black boxed. ColdFusion manages all of the cache keys automatically and also handles all of the storage and retrieval of cached items. Here’s a quick example of how easy it is to use the template cache to store a page fragment:
I'm dynamic data #now()# <br/>
<!--- cache this fragment for 5 seconds regardless of how many times it's accessed --->
I'm cached dynamic data: #now()# <br/>
<!--- cache this item, then flush it if it's not accessed for 5 seconds --->
I'm cached dynamic data too: #now()# <br/>
If you run this code, you’ll see that on the initial load all three timestamps are identical. Now start hitting your browser’s reload button. As you would expect, the timestamp for the uncached code will update with each load. The other two timestamps, however, won’t initially change as the values will be returned from the cache. Keep clicking reload. After 5 seconds you should see the value of the second timestamp change as well:
This is because we set a timespan for the fragment to 5 seconds, meaning that ColdFusion should use the cached value for 5 seconds before updating with the live data. If you stop reloading the page and wait another 5 seconds or so before hitting reload again, you should see that all of the timestamps including the third one should have changed. This is because we set idletime for the third timestamp to 5 seconds. Idletime lets you specify how long to keep an item in cache if no one is requesting it before it should be evicted. In this case, we set idletime to 5 seconds so that not accessing the value from the cache for more than 5 seconds causes it to be evicted and the live value to be displayed and subsequently cached on the next request.
If you want to cache an entire page instead of individual fragments, the code is similar. However, instead of wrapping the entire page in <cfcache>… </cfcache> tags, you only need to place a single <cfcache> tag at the top of the page:
Currently #timeFormat(now(),'hh:mm:ss')# <br />
Random number: #rand()#
Running this code caches the entire page for 5 seconds. As you can see, there are two different sections of dynamic values that are being output and cached.
If you want more control over caching in ColdFusion, consider using the object cache. The object cache gives you granular control over putting items in and getting items out of the cache. It also lets you store more than just pages and fragments. Using the object cache, you can put any type of data that ColdFusion supports into the cache, including complex data types such as structures, arrays, queries and CFCs. Here’s a simple example that caches a query object from the sample database that installs with ColdFusion for 2 minutes:
<!--- Go to the cache. If the data isn’t there, go to the db then
repopulate the cache --->
<cfset getArtists = cacheGet("artistQuery")>
<cfquery name="getArtists" datasource="cfartgallery">
<cfset cachePut("artistQuery", getArtists, createTimeSpan(0,0,2,0))>
In this code, the first thing we’re do is attempt to get the query from the cache using the cacheGet() function. The cacheGet() function takes two arguments, the cached value’s key and an optional cache name. Here, we’re just passing in “artistQuery” as the key. The next bit of code checks to see if the cacheGet() returns Null. If it does, we know that the query doesn’t exist in the cache so we immediately go back to the source system (in this case the cfartgallery database) and re-run the query. After the results come back, we put them back in the cache using the cachePut() function, setting a timeout for the cached query of 2 minutes. Finally, we return the query and dump it to the browser.
Scaling out with the Terracotta Server
So far, all of the examples we’ve walked through used the L1 in-process cache that’s part of Ehcache core. Let’s up the ante a bit by adding a L2 out-of-process cache.
You’ll need to open the XML file used by Ehcache for configuration. This file is called ehcache.xml and it’s located in the same place as the Jar files we renamed earlier: CFHOME/lib/ for stand-alone ColdFusion or /JRun4/servers/instance/cfusion-ear/cfusion-war/WEB-INF/cfusion/bin for multi-instance. If you scroll to the bottom of the file, you’ll see XML that looks like this:
This is the configuration ColdFusion and Ehcache use for every cache that gets created unless you specify otherwise. It’s possible to create your own custom caches either programmatically at runtime, or by hard-coding them in the ehcache.xml file. For the purposes of setting up our Terracotta server, let’s go ahead and add a custom cache to the ehcache.xml file. Go ahead and stop your ColdFusion server. Place the following code above the default configuration and save the file.
What you’ve just done here is created a custom cache called terracottaTest. Right now, the cache is still configured to run in-process. Go ahead and modify the code like this:
<terracottaConfig url="localhost:9510" />
<terracotta clustered="true" />
Your custom cache is now configured it for distributed caching with an L2 out-of-process Terracotta server and all it took was 2 additional lines of code! Before you start your ColdFusion server back up, we need to bring up the Terracotta server you installed earlier. Open a command prompt and navigate to the Terracotta server’s /bin directory. On my Windows 7 machine, that’s in:
Go ahead and run start-tc-server.bat if you’re on Windows, or start-tc-server.sh if you’re on Linux/Unix. If your server starts successfully, you should see a screen similar to this:
Once the Terracotta server is up and running and you see the “ready for work” message, go ahead and restart your ColdFusion server. It’s important to note that if you have ColdFusion configured for distributed caching and you don’t have the Terracotta server running, it will hang your ColdFusion server. Hopefully this is something Adobe will address in a future ColdFusion update.
Ehcache comes with a nice developer console you can use as you develop to gain insight into what’s happening with both your L1 and L2 caches. To run the console, navigate to the same directory where you launched the Terracotta server and run the /dev-console.bat on Windows or /dev-console.sh on UNIX/Linux. You’ll get a login screen like this:
Click Connect and you should see both your L1 local client node as well as the L2 Terracotta server you configured (Server Array). If you expand out the Terracotta Cluster tree item, you’ll see a screen that should show that your TerracottaTest cache is configured in distributed mode:
Let’s run some sample code so you can watch as data is put in and then retrieved from the cache:
<!--- fill the cache with 10,000 items --->
<cfloop from="1" to="10000" index="i">
<cfset cachePut(i, 'Item #i#', '#createTimeSpan(0,0,5,0)#', '#createTimeSpan(0,0,5,0)#', 'terracottaTest')>
<!--- get from the cache 10 million times --->
<cfloop from="1" to="10000000" index="j">
<cfset x = cacheGet(randRange(1,10000), 'terracottaTest')>
This will put 10,000 items in the cache, then start randomly pulling items out 10 million times. This should allow enough time for you to see what’s happening in the dev console:
This article really only begins to scratch the surface of what you can accomplish with ColdFusion and Ehcache. There are several other features in Ehcache 2.4 that are beyond the scope of this article but worth exploring:
· 2nd level cache provider for ColdFusion’s Hibernate ORM implementation
· Cache search
· Distributed transactions
· Integration with Terracotta Big Memory
For more information on Ehcache and Terracotta’s other products, see their website at http://www.terracotta.org.
About the Author
Rob Brooks-Bilson is a consultant, author, and the director of architecture at Amkor Technology, a global leader in providing assembly and test services to semiconductor companies and electronics OEMs. His responsibilities at Amkor include development of strategic technology direction, planning of effective resource utilization, coordinating and directing technical development teams, and more. He’s a frequent speaker at industry conferences as well as local user groups. Brooks-Bilson is also the author of two O'Reilly books, "Programming ColdFusion" and "Programming ColdFusion MX.".
Outside of work, Rob's a technophile, blogger, photographer, bed jumper, world traveler, hiker, mountain biker, and Adobe Community Professional for ColdFusion.