在Oozie中将参数从一个动作传递到另一个动作

Question

我有一个以下shell脚本:

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

我如何传递DATE给Java动作？

Answer 1

您可以从shell脚本捕获输出并将其传递给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为$ {wf:actionData('shellAction')['dateVariable']},其中shellAction是shell操作名称.

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,回显如下的值

 echo "dateVariable=${dateValue}"