Transcript Hao Shi-JBoss

Introduction to the JBoss
Presented by: Hao Shi
Agenda
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Application Servers
What is JBoss
JBoss features
Architecture of JBoss
Installation and running the server
Testing the installation
Application Servers
1. Provide a runtime for mission-critical applications;
2. Solve the many (client) to Few (resources) problem;
3. User code does not have to deal with:
- security
- Transactions
-Threading
- Pooling
- Clustering
- Caching
- Connectors
- Messaging
- ……
What is JBoss
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An open source J2EE server;
Founded by Marc Fleury in 1999;
Backed by a community of developers;
Yet another Java AppServer .
What made JBoss Special
 Free, open-source product; professional
supporting, consulting, and training
- Commercial Servers at $10k - $100k
 LGPL licensed
- Free use/Distribute/Embed
 Developer friendly
- No pre – compilation steps, etc
 Innovative design
- Lightweight, modular, dynamic
Architectural Innovations
• The JBoss Microkernel
- A light weight component framework that wires together a
set of services;
- Services are de-coupled, innovations are routed through an
internal bus;
Architectural Innovations
 Aspect Oriented Design
- Interceptors applied using Dynamic Proxies and
traditional OOD techniques;
 Instant Clustering;
JBoss Microcontainer
• The JBoss Microcontainer is a refactoring of JBoss's JMX
Microkernel to support direct POJO deployment and
standalone use outside the JBoss application server.
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All the features of the JMX Microkernel
Direct POJO deployment (no need for Standard/XMBean or MBeanProxy)
Direct IOC style dependency injection
Improved lifecycle management
Additional control over dependencies
Transparent AOP integration
Virtual File System
Virtual Deployment Framework
OSGi classloading
Jboss Today
 Most used application server in Development;
 20 million downloads;
 Large jboss.org community;
- 250,000+ users;
- 500+ contributors, over time, ~30 at any time;
- 300,000 forum posts;
- x10 bigger community than any open source server;
JBoss AS 5
 JEE 5 certified application server;
 Based on POJO Microcontainer;
- Aspectized light weight IoC container;
- JMX stays, become an aspect of POJO services;
 New implementations of core services;
- JBoss messaging;
- JBoss transactions;
 JBoss SEAM;
 JBoss webserver (Tomcat on steroids);
Installing JBoss AS
 Prerequisites:
- JDK 1.5 or above
- JAVA_HOME environment variable pointing to JDK
 Download the JBoss AS you want to install:
• http://www.jboss.org/jbossas/download
• Platform Independent Zip Archive
 Extract the archive in the directory you choose
 Run ( For Windows, run.bat, for Linux, run.sh);
Alternative Installation: JEMS
 GUI Installer utility
 Run through Java Wed Start or download and
run locally:
- http://www.jboss.org/jemsinstaller/downloads
- ‘java -jar jems-installer-1.2.1.CR4.jar’
 Choose between different profiles;
- All, Default, Minimal
- EJB3, EJB3 clustered
 Customize services installed;
 Secure admin consoles;
Directory Structure
/bin
Startup/Shutdown Script
/client
Client-side jars need to
communicate with JBoss
/docs
Configuration file DTD’s, licenses,
schemas data source configuration
examples
/lib
Microkernel libraries
Do not pub your application library
here
/server
Server configurations
Server Configuration Structure
/conf
Jboss static configuration files
Jboss service.xml: bootstrap config file for
JMX microkernel
/data
Used by services requiring permanent storage
(hypersonic, JBossMQ, SFSB..)
/deploy
Default location monitored by hot
development service, Put your application
archive here
/lib
Static java library directory. Libraries are
loaded in the shared class path server startup.
/log
Directory for Jboss log files
/tmp,
/work
Temporary directories
Start the server
• To launch an instance of JBoss
run [–c <configuration>]
if –c parameter is not specified, default configuration is used
Microkernel benefits for SOA
architecture
• Microkernel approach ideal for ISV and
OEM
 Easily remove the services you don’t need
 Tight footprint and modular codebase and hot
deploy/remove/redeploy
 JBoss is a TRUE Service Oriented
Architecture (SOA)
Microkernel benefits for SOA
architecture
Deployers: Working from the
Network
Deployers: Working from the
Network
Tomcat standalone or Tomcat
inside JBoss ?
• Better JBoss deployer
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Hot deployment
Deployment of nested archives (EARs, SARs)
Redeployment
Automatic undeployment
• Advanced clustering
• Integrated J2EE stack within one VM
 Deployment descriptor
 Optimized local calls
 Integrated security
• AOP in JBoss 4.0 available in Tomcat components and webapps
• Easy to use class loader
• Nukes
JBoss IDE
• JBoss IDE is based on Eclipse.
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 Series of plugins for Eclipse
The debugging and monitoring of JBoss servers and the
control of their life cycle (start/stop).
A very comfortable and sophisticated support for XDoclet
 Support completion and generation
 Support for AOP (completion and generation).
An easy way to configure and deploy the packaging
layout of archives (packed or exploded)
Thank You.