Maven Environment specific Build

Assume we have two different environments staging and production. Every time we want to build war for these environment, it is expected that configuration file(here it is application.properties) for the target environment is comes with war file.

Prerequisite

Maven

Our configuration file is present

src/main/resources/
    appliocation.properties
    dev/
    	 appliocation.properties
    production/
    	 appliocation.properties
    staging/
    	application.properties

We will see how we can use profile to achieve goal. We will define three profiles

• dev
• staging
• production

dev

This is a default profile. This is used in eclipse

staging

This profile is used to build war for staging

production

This profile is used to build war for production

<profiles>
	<profile>
		<id>local</id>
		<activation>
			<activeByDefault>true</activeByDefault>
		</activation>
	</profile>
	<profile>
		<id>staging</id>
		<properties>
			<env>staging</env>
		</properties>
	</profile>
	<profile>
		<id>production</id>
		<properties>
			<env>production</env>
		</properties>
	</profile>
</profiles>

While building war, we will filter our configuration file in resource section as shown below

<filters>
	<filter>src/main/resources/${env}/application.properties</filter>
</filters>
<resources>
	<resource>
		<directory>src/main/resources/${env}</directory>
		<filtering>true</filtering>
		<includes>
			<include>application.properties</include>
		</includes>
	</resource>
	<resource>
		<directory>src/main/resources</directory>
		<filtering>true</filtering>
		<excludes>
			<exclude>**/application.properties</exclude>
		</excludes>
	</resource>
</resources>

And we have to use profile option of maven to build war file for different environment. For staging it is

mvn clean install -P staging

For production it is,

mvn clean install -P  production