在Oozie中将参数从一个动作传递到另一个动作

时间:2015-06-16 17:07:06

标签: java shell hadoop mapreduce oozie

我有以下shell脚本:

DATE= date +"%d%b%y" -d "-1 days"

如何将DATE传递给Java操作?

1 个答案:

答案 0 :(得分:8)

您可以捕获shell脚本的输出并将其传递给java action。在shell脚本中,回显属性,如'dateVariable = $ {DATE}',并在shell操作中添加capture-output元素。这将允许您从shell脚本捕获dateVariable。在java操作中,您可以将捕获的变量作为参数传递给 $ {wf:actionData('shellAction')['dateVariable']}其中shellAction是shell动作名称。

示例工作流程: -

<?xml version="1.0" encoding="UTF-8"?>
<workflow-app xmlns="uri:oozie:workflow:0.4"
    name="Test workflow">
    <start to="shellAction" />
    <action name="shellAction">
        <shell xmlns="uri:oozie:shell-action:0.1">
            <job-tracker>${jobTracker}</job-tracker>
            <name-node>${nameNode}</name-node>
            <exec>test_script.sh</exec> <file>${nameNode}/${workFlowLocation}/Scripts/test_script.sh#test_script.sh</file>          
            <capture-output />
        </shell>
        <ok to="JavaAction" />
        <error to="fail" />
    </action>

    <action name="JavaAction">
        <java>
            <main-class>com.test.TestDriver</main-class>
            <arg>${wf:actionData('shellAction')['dateVariable']}</arg>
            <capture-output />
        </java>
        <ok to="end" />
        <error to="fail" />
    </action>

    <kill name="fail">
        <message>Job failed, error
            message[${wf:errorMessage(wf:lastErrorNode())}]</message>
    </kill>
    <end name="end" />
</workflow-app>

在shell脚本中,回显下面的值

 echo "dateVariable=${dateValue}"