Mule property placeholder
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When using multiple property files that define the same properties, the values in the property file listed last will override those listed earlier. This is because properties are read from the last listed file first and this overrides any same-named properties from earlier files. The document demonstrates configuring Mule to read properties from two files, and shows that reversing the file order changes which property values are used.
Mule property placeholder
- 1. Overriding the property key based on the order of Property files *
- 2. *When we have configured our application to use multiple property files in which some (or all) properties are same, values from the most recently read properties file will override the values set by property files previous ones. *For example, *Below are the screenshots of the property files in different scopes.
- 3. XML configuration to print the value read from the properties file: <?xml version="1.0" encoding="UTF-8"?> <mule xmlns:context="http://www.springframework.org/schema/context" xmlns:http="http://www.mulesoft.org/schema/mule/http" 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-3.7.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-current.xsd 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/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd"> <context:property-placeholder location="classpath:ClassPath.properties,file:C:/Softwares/Test Files/File.properties"/> <http:listener-config name="HTTP_Listener_Configuration" host="localhost" port="8123" doc:name="HTTP Listener Configuration"/> <flow name="PropertyplaceholderFlow"> <http:listener config-ref="HTTP_Listener_Configuration" path="/expr" doc:name="HTTP"/> <logger level="INFO" message="Property User Value::${user}" doc:name="Logger"/> <set-payload value="Property User Value::${user}"/> </flow> </mule> *
- 4. *Response for the above XML configuration:
- 5. <?xml version="1.0" encoding="UTF-8"?> <mule xmlns:context="http://www.springframework.org/schema/context" xmlns:http="http://www.mulesoft.org/schema/mule/http" 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-3.7.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-current.xsd 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/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd"> <context:property-placeholder location="file:C:/Softwares/Test Files/File.properties,classpath:ClassPath.properties"/> <http:listener-config name="HTTP_Listener_Configuration" host="localhost" port="8123" doc:name="HTTP Listener Configuration"/> <flow name="PropertyplaceholderFlow"> <http:listener config-ref="HTTP_Listener_Configuration" path="/expr" doc:name="HTTP"/> <logger level="INFO" message="Property User Value::${user}" doc:name="Logger"/> <set-payload value="Property User Value::${user}"/> </flow> </mule> XML configuration to print the value read from the properties file:
- 6. *Response for above XML configuration: