在不同的JVM上运行Ant任务 [英] Run ant task in different jvm

问题描述

我们的Ant构建是使用Java 1.7.0的JAVA_HOME运行。这样的javac和所有其他的Java相关的目标默认使用正确的Java。

Our ant build is run using Java 1.7.0 for JAVA_HOME. This way javac and all other Java dependent targets use the correct Java by default.

但是，从外部供应商1蚂蚁目标不支持（或者说有一个bug）使用Java 1.7.0。而且不像例如javac的或分叉的JUnit，这个目标不支持参数切换JVM。

But 1 ant target from an external supplier does not support (or rather has a bug) using Java 1.7.0. And unlike e.g. javac or a forked junit, this target does not support parameters to switch jvm.

是否有可能在不同的JVM运行特定Ant目标？

Is it possible to run a specific ant target in a different jvm?

推荐答案

要做出珍妮Boyarsky的使用建议 EXEC Ant任务具体，下面的例子包装了 EXEC 任务在宏与不同的JVM，以简化您的呼叫目标。请注意，JVM使用Ant的环境变量 JAVACMD <设置/ A>

To make Jeanne Boyarsky's suggestion of using the exec Ant task concrete, the following example wraps the exec task in a macro to simplify calling targets with various JVMs. Notice that the JVM is set using the Ant environment variable JAVACMD.

<?xml version="1.0" encoding="UTF-8"?>
<project name="run-target-with-specified-java-version" default="test">

  <macrodef name="exec-target">
    <attribute name="antfile" default="${ant.file}" />
    <attribute name="target" />
    <attribute name="jvm" default="${java.home}/bin/java" />
    <sequential>
      <exec executable="ant">
        <env key="JAVACMD" value="@{jvm}" />
        <arg line='-f "@{antfile}"' />
        <arg line="@{target}" />
      </exec>
    </sequential>
  </macrodef>


  <target name="echo-java-version">
    <echo message="Java version: ${java.version}" />
  </target>


  <target name="test">
    <exec-target target="echo-java-version" />

    <property name="java1.6"
        location="/usr/lib/jvm/jdk1.6/bin/java" />
    <exec-target target="echo-java-version" jvm="${java1.6}" />
  </target>
</project>

输出

test:
     [exec] Buildfile: /home/your/project/build.xml
     [exec] 
     [exec] echo-java-version:
     [exec]      [echo] Java version: 1.7.0
     [exec] 
     [exec] BUILD SUCCESSFUL
     [exec] Total time: 0 seconds
     [exec] Buildfile: /home/your/project/build.xml
     [exec] 
     [exec] echo-java-version:
     [exec]      [echo] Java version: 1.6.0
     [exec] 
     [exec] BUILD SUCCESSFUL
     [exec] Total time: 0 seconds

BUILD SUCCESSFUL
Total time: 2 seconds

这篇关于在不同的JVM上运行Ant任务的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！