Network Deployment (Distributed operating systems), v8.0 > Administer applications and their environment

Use Ant to automate tasks

To support using Apache Ant with Java EE applications running on the application server, the product provides a copy of the Ant tool and a set of Ant tasks that extend the capabilities of Ant to include product-specific functions. Ant has become a very popular tool among Java programmers. Apache Ant is a Java-based build tool. In theory, it is similar to Make, but Ant is different. Instead of a model in which it is extended with shell-based commands, Ant is extended using Java classes. Instead of writing shell commands, XML-based configuration files are used. These files reference a target tree in which various tasks are run. Each task is run by an object that implements a particular Task interface.

• Call the WebSphere_Ant (WsAnt) scripts outside of the ws_ant launcher is not supported or recommended.

• When you invoke the Ant tool, do not pass empty strings in place of command arguments in ant script. The script will not work in the wsadmin environment. The <arg value> cannot be an empty string, such as shown in the following example:

  <?xml version="1.0" encoding="UTF-8"?>
  <project name="proj" default="main">
  <taskdef name="wsadmin" classname="com.ibm.websphere.ant.tasks.WsAdmin"/>
  <target name="main">
  <wsadmin,conntype="NONE" lang="jython" failonerror="true" script="&(basedir)/script.ph">
  <arg value="blah" />
  <arg value="" />
  </wsadmin>
  <!-- manaeapp action="blah" variation-number="0" -->
  </target>
  </project> 

By combining the following tasks with those provided by Ant, you can create build scripts that compile, package, install, and test the application on the application server:

• Install and uninstall applications

• Start and stop servers in a base configuration
• Run administrative scripts or commands
• Run the EJB deployment tool for EJB 1.x or 2.x modules
• Run the JSP file precompilation tool

For more detailed information about Ant, refer to the Apache organization website.

Procedure

• To run Ant and have it automatically see the WebSphere classes, use the ws_ant command.

  The ws_ant command is provided with the Apache Ant tool.

  See the WAS_HOME/bin/ws_ant.bat|sh file for the Apache Ant tool.

• Use Ant tasks for deployment and server operation.

  The Apache Ant tasks for the product reside in the Java package: com.ibm.websphere.ant.tasks. The API documentation for this package contains detailed information about all of the Ant tasks that are provided and how to use them.

  See com.ibm.websphere.ant.tasks API documentation in the Reference section of the information center.

• Use Ant tasks for building application code.

  Refer to the Rational Application Developer documentation.

• Use the Apache Struts framework to create an extensible development environment for the application, based on published standards and proven design patterns.

  Apache struts is a framework that is supported by the open source community.

  IBM WAS provides the Apache Struts JAR file in the install_root/optionalLibraries/Apache/Struts/1.1 directory of your product installation. If using Struts in the application or Application Server, configure a shared library that points to the Struts library JAR file.

  The Struts framework provides the invisible underpinnings every professional web application needs to survive. The core of Struts is a flexible control layer based on standard technologies such as Java Servlets, JavaBeans, ResourceBundles, and XML.

  Deprecated feature: Shipment of Apache Struts 1.1, 1.2.4, and 1.2.7 as optional libraries within WAS is deprecated in v7.0.depfeat

  Struts encourages application architectures based on the Model 2 approach, a variation of the classic Model-View-Controller (MVC) design paradigm. Struts provides its own Controller component and integrates with other technologies to provide the Model and the View. For the Model, Struts can interact with any standard data access technology, including EJB components, and JDBC. For the View, Struts works well with JSP files, XSLT, or other presentation systems.

Manage shared libraries

Related

Batch compiler ant task
Rational Application Developer documentation

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