By adding Java to their App Engine, Google has opened the door for a whole slew of languages that have been implemented on the JVM, now including PHP via Quercus.
This weekend I decided to give it a try and deploy a (very) old tutorial of mine - PHP Tutorial - on GAE.
I must admit that I was very pleasantly surprised by how effortless it was. OK, it’s a very rudimentary PHP application, the only PHP code used was to run the examples described on the code blocks and do some includes; nevertheless I didn’t feel the need to change a single line of code.
Also, deploying a Java application to GAE is simpler than a Python one. Not only because you have a very handy Eclipse plugin, but you will also find configuring the file appengine-web.xml a lot easier when compared to app.yaml.
All you need to do in order to deploy a PHP application, at least as simple as the one I’ve tried, is to follow these steps:
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Stripes Framework presentation for the Portuguese Java User Group session on the JavaPT09 event.
The used source code is also available.
The JBoss Microcontainer is a refactoring of JBoss’s JMX Microkernel to support direct POJO deployment and standalone use outside the JBoss application server.
It allows the creation of services using simple Plain Old Java Objects (POJOs) to be deployed into a standard Java SE runtime environment.
JBoss Microcontainer uses dependency injection to wire individual POJOs together to create services. Configuration is performed using either annotations or XML depending on where the information is best located.
The goal of this article is to show how easy it is to test these services using TestNG testing framework.
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Following the previous article Combine and minimize JavaScript and CSS files for faster loading, I implemented a similar solution as a Maven plugin.
This plugin combines and minimizes JavaScript and CSS files using YUI Compressor for faster page loading.
More details can be found on the Maven Minify Plugin page.
For those getting a SocketTimeoutException when calling an Axis 1.4 Web Service.
This may be a solution for your problem.
If your log show an error similar to this:
12:38:51,693 ERROR [TerminalSessionHelper] ; nested exception is:
java.net.SocketTimeoutException: Read timed out
AxisFault
faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
faultSubcode:
faultString: java.net.SocketTimeoutException: Read timed out
faultActor:
faultNode:
faultDetail:
{http://xml.apache.org/axis/}stackTrace:java.net.SocketTimeoutException: Read timed out
... |
And your call looks like this:
TerminalSessionService terminalSessionService = new TerminalSessionServiceLocator();
TerminalSession_PortType terminalSession_PortType = terminalSessionService.getTerminalSession();
((TerminalSessionSOAPBindingStub) terminalSession_PortType).setTimeout(15000); |
Try to use CommonsHTTPSender as the Transport Sender of the Axis client:
BasicClientConfig basicClientConfig = new BasicClientConfig();
SimpleChain simpleChain = new SimpleChain();
simpleChain.addHandler(new CommonsHTTPSender());
basicClientConfig.deployTransport("http", simpleChain);
TerminalSessionService terminalSessionService = new TerminalSessionServiceLocator(basicClientConfig);
TerminalSession_PortType terminalSession_PortType = terminalSessionService.getTerminalSession();
((TerminalSessionSOAPBindingStub) terminalSession_PortType).setTimeout(15000); |
This also has the advantage to use HTTP 1.1 instead of HTTP 1.0.
Note: You will need to add the common-httpclient.jar and common.codec.jar to the jar directory for this to work.
Still want to use HTTP 1.0? No problem, just add the following line of code:
((TerminalSessionSOAPBindingStub) terminalSession_PortType)._setProperty(
MessageContext.HTTP_TRANSPORT_VERSION, HTTPConstants.HEADER_PROTOCOL_V10); |
Hope this can save your time. Axis can be really painful…
Everyone knows that documentation is not one of JBoss strengths.
This article is meant to fill this gap. It describes and exemplifies how to configure JBoss PojoCache as a MBean service, using loadtime transformations with JBossAop framework, so you don’t need precompiled instrumentation.
Introduction
This section gives you an introduction about PojoCache and its advantages over TreeCache (a plain cache system).
PojoCache is an in-memomy, transactional, and replicated POJO (plain old Java object) cache system that allows users to operate on a POJO transparently without active user management of either replication or persistency aspects. PojoCache, a component of JBossCache (uses PojoCache class as an internal implementation, the old implementation TreeCacheAop has been deprecated.), is the first in the market to provide a POJO cache functionality. JBossCache by itself is a 100% Java based library that can be run either as a standalone program or inside an application server.
TreeCache limitations:
- Users will have to manage the cache specifically; e.g., when an object is updated, a user will need a corresponding API call to update the cache content.
- If the object size is huge, even a single field update would trigger the whole object serialization. Thus, it can be unnecessarily expensive.
- The object structure can not have a graph relationship. That is, the object can not have sub-objects that are shared (multiple referenced) or referenced to itself (cyclic). Otherwise, the relationship will be broken upon serialization.
PojoCache advantages:
- No need to implement Serializable interface for the POJOs.
- Replication (or even persistency) is done on a per-field basis (as opposed to the whole object binary level).
- The object relationship and identity are preserved automatically in a distributed, replicated environment. It enables transparent usage behavior and increases software performance.
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“.htaccess - gzip and cache your site for faster loading and bandwidth saving” is one of the most popular posts on samaxes.
It’s basically on how to compress and cache your site content with Apache and .htaccess file.
It works like a charm, but it’s not yet the perfect configuration for me.
I wanted something that I can use out-of-the-box without having to rely on external extension modules or tools.
If you are lucky enough to have Apache 2 with your hosting provider you can use the mod_deflate module that comes bundled with it.
In order to compress your text files with this Apache’s module you just have to add the following lines to your .htaccess file:
<IfModule mod_deflate.c>
<FilesMatch "\.(css|js|x?html?|php)$">
SetOutputFilter DEFLATE
</FilesMatch>
</IfModule> |
This will gzip all your *.css, *.js, *.html, *.html, *.xhtml, and *.php files.
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I really enjoy jQuery. But finding the right UI widget can be a daunting task.
Autocomplete is one of those widgets.
I decided to share an asynchronous example on how to use the jQuery Autocomplete plugin with Stripes.
Here’s an example output:
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JBoss announced the GA release of JBoss AS 5.0.
JBoss 5 is the next generation of the JBoss Application Server build on top of the new JBoss Microcontainer. The JBoss Microcontainer is a lightweight container for managing POJOs, their deployment, configuration and lifecycle. It is a standalone project that replaces the famous JBoss JMX Microkernel of the 3.x and 4.x JBoss series. The Microcontainer integrates nicely with the JBoss framework for Aspect Oriented Programming, JBoss AOP. Support for JMX in JBoss 5 remains strong and MBean services written against the old Microkernel are expected to work.
JBoss5 is designed around the advanced concept of a Virtual Deployment Framework (VDF), that takes the aspect oriented design of many of the earlier JBoss containers and applies it to the deployment layer. Aspectized Deployers operate in a chain over a Virtual File System (VFS), analyze deployments and produce metadata to be used by the JBoss Microcontainer, which in turn instantiates and wires together the various pieces of a deployment, controlling their lifecycle and dependencies.
See the full release notes and downloads page.
And good luck to get your J2EE applications working with this new version.
This example was greatly inspired by the Stripes and jQuery AJAX Forms article from Freddy Daoud, but with some nice improvements
Last week I was working on a new Stripes/AJAX example. It involves having a table listing entities, being the last row of the table a form for adding new ones.
The form gets submitted via AJAX, using jQuery, and the response is validated in order to check if the HTTP session is still valid.
If everything is OK, the list is refreshed and a success message appears. On the other hand, if validation errors occur, the list is refreshed and an error message appears.
Also, if the user’s session has expired on the server, an alert is shown to inform the user that his session is invalid, and the page is reloaded so the user can login once more.
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