Oozie coordinator get day of the week - oozie

Question

I am trying to create a condition in my Oozie workflow, where an action should be executed only on mondays (at the end of the workflow).
So far I added a decision node in the workflow, and the current date as parameter in the coordinator, and I need to test the day of the week.
coordinator.xml
<coordinator-app name="${project}_coord" frequency="${coord_frequency}" start="${coord_start_date}" end="${coord_end_date}" timezone="UTC" xmlns="uri:oozie:coordinator:0.1">
<controls>
<concurrency>1</concurrency>
<execution>LAST_ONLY</execution>
</controls>
<action>
<workflow>
<app-path>${wf_application_path}</app-path>
<configuration>
<property>
<name>currentDate</name>
<value>${coord:formatTime(coord:dateOffset(coord:nominalTime(), 0, ‘DAY’), “yyyyMMdd”)}</value>
</property>
</configuration>
</workflow>
</action>
workflow.xml
<decision name = "send_on_monday">
<switch>
<case to = "send_file">
${currentDay} eq "MON" <-------- test on day of the week
</case>
<default to = "sendSuccessEmail" />
</switch>
</decision>
<action name="send_file">
<ssh xmlns="uri:oozie:ssh-action:0.1">
<host>${remoteNode}</host>
<command>/pythonvenv</command>
<args>${fsProjectDir}/send_file.py</args>
</ssh>
<ok to="sendSuccessEmail"/>
<error to="sendTechnicalFailureEmail"/>
</action>
I didn't find information on how to get the day of the week with EL functions.
Any help is appreciated.

Answer 1

I found a solution by using wf:actionData in a decision node :
workflow.sh
<action name="getDayOfWeek">
<ssh xmlns="uri:oozie:ssh-action:0.1">
<host>${remoteNode}</host>
<command>${fsProjectDir}/scripts/dayOfWeek.sh</command>
<capture-output/>
</ssh>
<ok to="send_on_monday"/>
<error to="sendTechnicalFailureEmail"/>
</action>
<decision name="send_on_monday">
<switch>
<case to = "send_file">
${wf:actionData('getDayOfWeek')['day'] eq 'Mon'}
</case>
<default to = "sendSuccessEmail" />
</switch>
</decision>
dayOfWeek.sh
#!/bin/sh
DOW=$(date +"%a")
echo day=$DOW