auto-starting Mule flow

问题

I'm trying this approach to autostart a Mule flow

Starting a mule flow programmatically using groovy

and it does not start the flow. Here's a very simple test run in Mule Studio with the 3.4.0 CE

<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns:scripting="http://www.mulesoft.org/schema/mule/scripting"     
xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
xmlns:spring="http://www.springframework.org/schema/beans" version="CE-3.4.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans     
http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/scripting http://www.mulesoft.org/schema/mule/scripting/current/mule-scripting.xsd">

<flow name="auto2Flow1" doc:name="auto2Flow1">
    <scripting:component doc:name="Groovy">
        <scripting:script engine="Groovy">
             muleContext.registry.lookupFlowConstruct('flow1').start()
        </scripting:script>
    </scripting:component>
</flow>

<flow name="flow1" doc:name="flow1">
    <logger level="INFO" doc:name="Logger" message="hello"/>
</flow>

</mule>

I also tried this with no luck

<expression-component>
   app.registry.flow1.start();
</expression-component>

I'm assuming flow1 is automatically registered but not sure.

回答1:

I think that what you are trying to do is not starting the flow but instead send an event to it so, in your case, you'll see the logger write out hello.

For this, use:

app.registry.flow1.process(event);

with 'event' being an instance of DefaultMuleEvent (javadoc).

回答2:

Flows are automatically started, you don't need to "run" them.

Messages will be processed depending on the message sources you have in your flows, which are the ones triggering the flow execution.

I would suggest you to carefully read the documentation: http://www.mulesoft.org/documentation/display/current/Mule+Application+Architecture

回答3:

You should not start the flow manually. Once you deployed your mule application locally or in cloud or on premise the flow will start automatically. If you would like to stop the flow or freeze the flow for some time then you can use some groovy Script something like sleep(1000); for some time

回答4:

This way you can start/stop your flow programmatically by using groovy component

<scripting:component doc:name="start/stop the flows">
<scripting:script engine="Groovy">
<![CDATA[muleContext.registry.lookupFlowConstruct('my-Flow-1').start();
muleContext.registry.lookupFlowConstruct('my-Flow-2').start();
muleContext.registry.lookupFlowConstruct('myFlow-3').stop();
]]></scripting:script></scripting:component>

来源：https://stackoverflow.com/questions/27277106/auto-starting-mule-flow

标签

groovy

mule