Not getting values from properties files in context.xml file - maven

Question

I am unable to retrieve value from .properties file into my context.xml
pom.xml ( didn't mention dependencies )
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com</groupId>
<artifactId>myproj</artifactId>
<version>0.1.1</version>
<packaging>war</packaging>
<name>myproj</name>
<url>http://maven.apache.org</url>
<profiles>
<profile>
<id>dev</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<properties>
<env>dev</env>
<build.number>0</build.number>
<svn.revision.number>0</svn.revision.number>
</properties>
</profile>
</profiles>
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/environment</directory>
<filtering>false</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>tomcat-maven-plugin</artifactId>
<version>1.0-alpha-2</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.5</version>
<configuration>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.8</version>
<configuration>
<printSummary>false</printSummary>
<redirectTestOutputToFile>true</redirectTestOutputToFile>
<excludes>
<exclude>**/*_Roo_*</exclude>
</excludes>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2.1</version>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.7</version>
<configuration>
<downloadSources>true</downloadSources>
<downloadJavadocs>false</downloadJavadocs>
<wtpversion>2.0</wtpversion>
<additionalBuildcommands>
<buildCommand>
<name>org.eclipse.ajdt.core.ajbuilder</name>
<arguments>
<aspectPath>org.springframework.aspects</aspectPath>
</arguments>
</buildCommand>
<buildCommand>
<name>org.springframework.ide.eclipse.core.springbuilder</name>
</buildCommand>
</additionalBuildcommands>
<additionalProjectnatures>
<projectnature>org.eclipse.ajdt.ui.ajnature</projectnature>
<projectnature>com.springsource.sts.roo.core.nature</projectnature>
<projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
</additionalProjectnatures>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.0.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<warName>myproj</warName>
</configuration>
</plugin>
</plugins>
</build>
</project>
context.xml (inside src/main/webapp/META-INF)
<?xml version="1.0" encoding="UTF-8"?>
<Context>
<!-- Specify a JDBC datasource -->
<Resource name="jdbc/mydb" auth="Container"
type="javax.sql.DataSource" username="${database.usernameee}" password="${database.password}"
driverClassName="net.sourceforge.jtds.jdbc.Driver"
url="jdbc:jtds:sybase://localhost:9000/common_db"
maxActive="10" maxIdle="4" />
</Context>
I have some .properties files inside under:
src/main/resources
src/main/environment/dev
I am unable to get values inside my context.xml of ${database.usernameee} and ${database.password}
please suggest what went wrong?

Answer 1

Do the following:
1) Remove the <resources> section. It's not needed for the filtering you want to do and src/main/resources is the default - it doesn't need to specified separately.
<build>
<!-- Delete the <resources> section -->
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/environment</directory>
<filtering>false</filtering>
</resource>
</resources>
2) Add a <filters> element under <build> specifying the environment specific properties file
<build>
<filters>
<filter>src/main/environment/${env}/some.properties</filter>
</filters>
...
The above assumes your properties files are called some.properties - so change this to the real name of your file.
3) Modify the configuration of the maven-war-plugin
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<webResources>
<resource>
<filtering>true</filtering>
<directory>src/main/webapp</directory>
<includes>
<include>**/META-INF/context.xml</include>
</includes>
</resource>
</webResources>
<warSourceDirectory>src/main/webapp</warSourceDirectory>
<webXml>src/main/webapp/WEB-INF/web.xml</webXml>
<warName>myproj</warName>
</configuration>
</plugin>
That will now filter the context.xml using the environment specific properties - depending upon what profile you used.
(note that you may have a typo in 'database.usernameee' - as it has extra ee at the end)

Answer 2

If you want to get your Maven properties from external files (not from properties inside POM's), you should use Maven Filters: see here and here.