![ .mflow
<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns:tracking="http://www.mulesoft.org/schema/mule/ee/tracking" xmlns:http="http://www.mulesoft.org/schema/mule/http"
xmlns:vm="http://www.mulesoft.org/schema/mule/vm" 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="EE-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/vm http://www.mulesoft.org/schema/mule/vm/current/mule-vm.xsd
http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd
http://www.mulesoft.org/schema/mule/ee/tracking http://www.mulesoft.org/schema/mule/ee/tracking/current/mule-tracking-ee.xsd">
<flow name="MessagePropertiesFlow1" doc:name="MessagePropertiesFlow1">
<http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8089" path="expressionfilter"
doc:name="HTTP"/>
<message-properties-transformer scope="session" doc:name="Message Properties">
<add-message-property key="property1" value="mule studio"/>
</message-properties-transformer>
<logger message="--flow1--#[sessionVars['property1']]" level="INFO" doc:name="Logger"/>
<expression-filter expression="#[sessionVars['property1']!='mule']" doc:name="Expression"/>
<vm:outbound-endpoint exchange-pattern="request-response" path="messageproperties" doc:name="VM"/>
</flow>
<flow name="MessagePropertiesFlow2" doc:name="MessagePropertiesFlow2">
<vm:inbound-endpoint exchange-pattern="request-response" path="messageproperties" doc:name="VM"/>
<logger message="---flow2--#[sessionVars['property1']]" level="INFO" doc:name="Logger"/>
</flow>
</mule>](https://image.slidesharecdn.com/howtouseexpressionfilter-160103180218/85/Expression-filter-in-Mule-4-320.jpg)
![ Output:
INFO 2015-10-03 16:00:23,705 [[messageproperties].config.change.14.thread.1]
org.mule.DefaultMuleContext:
**********************************************************************
* Application: messageproperties *
* OS encoding: Cp1252, Mule encoding: UTF-8 *
* *
* Agents Running: *
* Clustering Agent *
* JMX Agent *
**********************************************************************
INFO 2015-10-03 16:00:23,706 [[messageproperties].config.change.14.thread.1]
org.mule.module.launcher.MuleDeploymentService:
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Started app 'messageproperties' +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
INFO 2015-10-03 16:00:26,480 [[messageproperties].connector.http.mule.default.receiver.02]
org.mule.api.processor.LoggerMessageProcessor: --flow1--mule--studio
INFO 2015-10-03 16:00:26,482 [[messageproperties].connector.http.mule.default.receiver.02]
org.mule.lifecycle.AbstractLifecycleManager: Initialising:
'connector.VM.mule.default.dispatcher.771015974'. Object is: VMMessageDispatcher
INFO 2015-10-03 16:00:26,482 [[messageproperties].connector.http.mule.default.receiver.02]
org.mule.lifecycle.AbstractLifecycleManager: Starting: 'connector.VM.mule.default.dispatcher.771015974'.
Object is: VMMessageDispatcher
INFO 2015-10-03 16:00:26,489 [[messageproperties].connector.http.mule.default.receiver.02]
org.mule.api.processor.LoggerMessageProcessor: ---flow2--mule--studio](https://image.slidesharecdn.com/howtouseexpressionfilter-160103180218/85/Expression-filter-in-Mule-5-320.jpg)
Expression filter in Mule
- 2. The main motto of this PPT is how to use Expression filter in our applications.
- 4. .mflow <?xml version="1.0" encoding="UTF-8"?> <mule xmlns:tracking="http://www.mulesoft.org/schema/mule/ee/tracking" xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns:vm="http://www.mulesoft.org/schema/mule/vm" 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="EE-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/vm http://www.mulesoft.org/schema/mule/vm/current/mule-vm.xsd http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd http://www.mulesoft.org/schema/mule/ee/tracking http://www.mulesoft.org/schema/mule/ee/tracking/current/mule-tracking-ee.xsd"> <flow name="MessagePropertiesFlow1" doc:name="MessagePropertiesFlow1"> <http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8089" path="expressionfilter" doc:name="HTTP"/> <message-properties-transformer scope="session" doc:name="Message Properties"> <add-message-property key="property1" value="mule studio"/> </message-properties-transformer> <logger message="--flow1--#[sessionVars['property1']]" level="INFO" doc:name="Logger"/> <expression-filter expression="#[sessionVars['property1']!='mule']" doc:name="Expression"/> <vm:outbound-endpoint exchange-pattern="request-response" path="messageproperties" doc:name="VM"/> </flow> <flow name="MessagePropertiesFlow2" doc:name="MessagePropertiesFlow2"> <vm:inbound-endpoint exchange-pattern="request-response" path="messageproperties" doc:name="VM"/> <logger message="---flow2--#[sessionVars['property1']]" level="INFO" doc:name="Logger"/> </flow> </mule>
- 5. Output: INFO 2015-10-03 16:00:23,705 [[messageproperties].config.change.14.thread.1] org.mule.DefaultMuleContext: ********************************************************************** * Application: messageproperties * * OS encoding: Cp1252, Mule encoding: UTF-8 * * * * Agents Running: * * Clustering Agent * * JMX Agent * ********************************************************************** INFO 2015-10-03 16:00:23,706 [[messageproperties].config.change.14.thread.1] org.mule.module.launcher.MuleDeploymentService: ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + Started app 'messageproperties' + ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ INFO 2015-10-03 16:00:26,480 [[messageproperties].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: --flow1--mule--studio INFO 2015-10-03 16:00:26,482 [[messageproperties].connector.http.mule.default.receiver.02] org.mule.lifecycle.AbstractLifecycleManager: Initialising: 'connector.VM.mule.default.dispatcher.771015974'. Object is: VMMessageDispatcher INFO 2015-10-03 16:00:26,482 [[messageproperties].connector.http.mule.default.receiver.02] org.mule.lifecycle.AbstractLifecycleManager: Starting: 'connector.VM.mule.default.dispatcher.771015974'. Object is: VMMessageDispatcher INFO 2015-10-03 16:00:26,489 [[messageproperties].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: ---flow2--mule--studio
- 6. Flow of execution: 1. URL to trigger the service from browser http://localhost:8089/expressionfilter 2. session property is created using message property component In flow1 3. Service displays session properties in flow1 4. VM component in flow1 will call flow2 if the value of the session property is other then mule. 5. In the POC the session property value is “mule studio” so flow1 calls flow2 and displays session property value in flow2