JBoss Seam

2011年11月15日 (二) 16:05的版本

您可以在Wikipedia上了解到此条目的英文信息 JBoss Seam Thanks, Wikipedia.

JBoss Seam是一种企业级Java的应用程序框架。

目标：Seam、JSF和EJB3的组合就是用Java编写复杂Web应用程序的最简单办法。

新闻

自http://planet.jboss.org/xml/jbossseam?type=atom加载RSS失败或RSS源被墙

原则

它的灵感源自下列原则：

• 只有一种“工具”
• 将JSF与EJB 3.0整合
• 集成Ajax
• 将业务流程作为首要的基础建筑
• 声明式状态管理
• Bijection（双向注入）
• 工作区管理（Workspace Management）和多窗口浏览
• 更喜欢XML注解
• 集成测试轻而易举
• 规范也非尽善尽美
• Web应用程序不只是服务HTML页面

Functions

• Integrate JSF with EJB 3.0
• Integrated AJAX
• Integrate BPM: jBPM
• Seam component
• Declarative State Management
• Bijection
• Workspace Management
• Annotated POJOs Everywhere
• Testability as a Core Feature

Configuring Seam in Java EE 5

Seam contexts

• Stateless context
• Event (or request) context
• Page context
• Conversation context
• Session context

In a JSR-168 portal environment, the session context represents the portlet session.

• Business process context
• Application context

Seam stores its own configuration and metamodel in the application context.

Seam component types

• EJB 3.0 stateless session beans
• EJB 3.0 stateful session beans
• EJB 3.0 entity beans
• JavaBeans
• EJB 3.0 message-driven beans

Seam events

• JSF events
• jBPM transition events
• Seam page actions
• Seam component-driven events
• Seam contextual events

Pageflow in Seam

There are two ways to define pageflow in Seam:

• Using JSF navigation rules - the stateless navigation model
• Using jPDL - the stateful navigation model

install guide

Seam 2.0是针对JavaServer Faces 1.2开发的，所以我们推荐在JBoss 4.2下使用Seam，因为它包含了JSF 1.2参考实现。

• Ensure that you have JDK 5.0 or above and Ant 1.6 properly installed (not Ant 1.7 beta).
• For Seam 1.1.0.GA, download JEMS installer 1.2.0.BETA3 and install JBoss AS 4.0.5 with the ejb3 profile selected. Do not install any other version of JBoss, and do not try to install JBoss using any other profile, not even the all profile.
• Start JBoss AS with the bin/run.(sh|bat) script.
• Download Seam and unpack it.
• Edit build.properties in your Seam directory and configure the path to your JBoss AS installation directory.
• In the jboss-seam/examples/booking directory, type ant deploy and check for any error messages.
• Point your browser to http://localhost:8080/seam-booking/ and register an account.
• In the jboss-seam/examples/dvdstore directory, type ant deploy and check for any error messages.
• Point your browser to http://localhost:8080/seam-dvd/ and register an account.
• In the jboss-seam/examples/issues directory, type ant deploy and check for any error messages.
• Point your browser to http://localhost:8080/seam-issues/ and register an account.
• Change the pages and/or source code in your the jboss-seam/examples/booking directory and redeploy the application by calling ant deploy - see how your modifications affect the application.

Seam tools

http://docs.jboss.com/seam/1.0.0.GA/reference/en/html/tools.html

seam-gen

cd jboss-seam-2.2.x

seam setup // 设置seam环境
seam new-project // 创建一个新项目
seam new-action // 创建一个新action
seam new-form  // 创建一个新form
seam generate-entities // 从存在的数据库生成一个应用
seam generate-ui // 从存在的JPA/EJB3 entities生成一个应用

Database

PostgreSQL

persistence.xml

<jta-data-source>java:/blogDatasource</jta-data-source>

blog-ds.xml

    <local-tx-datasource>
       <jndi-name>blogDatasource</jndi-name>
       <connection-url>jdbc:postgresql://localhost/seam</connection-url>
       <driver-class>org.postgresql.Driver</driver-class>
       <user-name>seam</user-name>
       <password>seam</password>
   </local-tx-datasource>   

/deploy/postgresql-ds.xml

<datasources>
   <local-tx-datasource>
   <jndi-name>PostgresDS</jndi-name>
   <connection-url>jdbc:postgresql://localhost:5432/seam</connection-url>
   <driver-class>org.postgresql.Driver</driver-class>
   <user-name>seam</user-name>
   <password>seam</password>
   <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.PostgreSQLValidConnectionChecker</valid-connection-checker-class-name>
   <metadata>
   <type-mapping>postgresql</type-mapping>
   </metadata>
   </local-tx-datasource>
</datasources>

添加 postgresql-8.3-603.jdbc4.jar 到 jboss-5\common\lib 注意要重启 server

MySQL

/deploy/mysql-ds.xml

<datasources>
   <local-tx-datasource>
   <jndi-name>MySQLDS</jndi-name>
   <connection-url>jdbc:mysql://localhost:3306/test</connection-url>
   <driver-class>com.mysql.jdbc.Driver</driver-class>
   <user-name>root</user-name>
   <password>huihoo</password>
   <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker</valid-connection-checker-class-name>
   <metadata>
   <type-mapping>mySQL</type-mapping>
   </metadata>
   </local-tx-datasource>
</datasources>

Code

Developing Seam using IntelliJ IDEA

Seam Svn Repository http://seamframework.org/Download/SeamDownloads#H-SeamSVNRepository

Powered by

• http://www.trendrr.com
• http://www.javelincrm.com/

Documents

• Seamless JSF, Part 1: An application framework tailor-made for JSF
• Seamless JSF, Part 2: Conversations with Seam
• Seamless JSF, Part 3: Ajax for JSF

Links

• http://www.seamframework.org
• http://labs.jboss.com/portal/jbossseam/
• http://docs.jboss.com/seam/
• http://docs.huihoo.com/jboss/seam/
• http://download.huihoo.com/jboss/seam/

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