hadoop - Oozie Coordinator - 自定义 EL 函数

Question

我需要创建自定义 EL 函数并在 uri 模板中使用它(相当于 YEAR、MONTH)。有可能的？ oozie-site.xml 中coordinator这个区域的关键配置是什么？

Answer 1

属性 oozie.service.ELService.ext.functions.workflow 是您必须包含扩展 EL 函数到关联类和方法的所有映射的属性。多个映射条目以逗号分隔。

<property>
<name>oozie.service.ELService.ext.functions.workflow</name>
<value>
yourELkey=fully_quallified_class_name#static_method_name
</value>
<description>
EL functions declarations, separated by commas, format is
[PREFIX:]NAME=CLASS#METHOD. This property is a convenience
property to add extensions to the built in executors without
having to include all the built in ones.
</description>
</property>

有关如何打包和部署的更多信息，您可以引用 this .

编辑:由于您对类似于 YEAR、MONTH 的协调器的 EL 函数感兴趣，您可以查看以下属性(记录在 oozie-default.xml 中，您需要将其添加到 oozie-site.xml因为前者只是文档)- oozie.service.ELService.functions.coord-job-submit-freq和 oozie.service.ELService.ext.functions.coord-job-submit-freq。

<property>
        <name>oozie.service.ELService.functions.coord-job-submit-freq</name>
        <value>
            coord:days=org.apache.oozie.coord.CoordELFunctions#ph1_coord_days,
            coord:months=org.apache.oozie.coord.CoordELFunctions#ph1_coord_months,
            coord:hours=org.apache.oozie.coord.CoordELFunctions#ph1_coord_hours,
            coord:minutes=org.apache.oozie.coord.CoordELFunctions#ph1_coord_minutes,
            coord:endOfDays=org.apache.oozie.coord.CoordELFunctions#ph1_coord_endOfDays,
            coord:endOfMonths=org.apache.oozie.coord.CoordELFunctions#ph1_coord_endOfMonths,
            coord:conf=org.apache.oozie.coord.CoordELFunctions#coord_conf,
            coord:user=org.apache.oozie.coord.CoordELFunctions#coord_user,
            hadoop:conf=org.apache.oozie.action.hadoop.HadoopELFunctions#hadoop_conf
        </value>
        <description>
            EL functions declarations, separated by commas, format is [PREFIX:]NAME=CLASS#METHOD.
        </description>
    </property>

    <property>
        <name>oozie.service.ELService.ext.functions.coord-job-submit-freq</name>
        <value>
        </value>
        <description>
            EL functions declarations, separated by commas, format is [PREFIX:]NAME=CLASS#METHOD.
            This property is a convenience property to add extensions to the built in executors without having to
            include all the built in ones.
        </description>
    </property>