How to set property into gwt.xml file via maven properties?

Question

I have a property in root pom.xml file: gecko1_8. I want to place this to gwt.xml file.

So I put this property to gwt.xml:

I added the following to build section:

<resources>
  <resource>
  <directory>src/main/resources</directory>
  <filtering>true</filtering>
    <excludes>
      <exclude>VAADIN.themes/*</exclude>
    </excludes>
  </resource>
</resources>

But at the end build failed with the error:

ERROR: Invalid property value '${gwt.user.agents}'

ERROR: Failure while parsing XML

How to place values from pom.xml to gwt.xml file via properties?

UPDATED

Interesting thing. When I use "mvn resources:resources", property's value writes correctly to gwt.xml file, but if I run "mvn clean install -pl com.myproject.module:submodule" it failes with "invalid property value".

score 3 · Answer 1 · answered Jan 23 '13 at 17:57

You have to define a maven profile (better to define a specific profile for each cases) in your pom like this:

    <profile>
        <id>gecko</id>
        <activation>
            <activeByDefault>false</activeByDefault>
        </activation>
        <properties>
            <user.agent.gecko>
                <![CDATA[<set-property name="user.agent" value="gecko,gecko1_8" />]]>
            </user.agent.gecko>
        </properties>
        <build>
            <resources>
                <resource>
                    <directory>src/main/resources</directory>
                    <includes>
                        <include>**/*YourGWTModule.gwt.xml</include>
                    </includes>
                    <filtering>true</filtering>
                </resource>
            </resources>
            <defaultGoal>process-resources</defaultGoal>
        </build>
    </profile>

<properties>
    <!--<user.agent>ie6,ie8,gecko,gecko1_8,opera,safari</user.agent>-->
    <user.agent.all> </user.agent.all>
    <user.agent.ie6> </user.agent.ie6>
    <user.agent.ie8> </user.agent.ie8>
    <user.agent.gecko> </user.agent.gecko>
    <user.agent.opera> </user.agent.opera>
    <user.agent.safari> </user.agent.safari>
</properties>

Then set it in your YourGWTModule.gwt.xml like this:

<set-property name="locale" value="default" />
<!-- Specified through pom.xml profiles -->
${user.agent.all}
${user.agent.ie6}
${user.agent.ie8}
${user.agent.gecko}
${user.agent.safari}
${user.agent.opera}

</module>

Finally run maven with profile:

mvn -P gecko install

But what if I have several modules that use GWT? I have to write (copy-paste) such profiles in each module pom.xml? I mean, if I want to build just one specific module using -pl option. I thought that placing property in the root pom.xml should be enough...with some addition configuration surely. — Dragon, Jan 23 '13 at 20:15
@Dragon I think your solution is good or you can define a parent pom. — Saeed Zarinfam, Jan 24 '13 at 10:15
Note (for future generations ;)): if you have a Spring Boot app you should use @....@ instead of ${...} as described here: https://stackoverflow.com/questions/36501017/maven-resource-filtering-not-working-because-of-spring-boot-dependency — machinery, Jun 13 '17 at 10:24

score 0 · Accepted Answer · answered Jul 02 '13 at 14:05

There's one thing that I didn't mention but it appeared to be too important. Plugins that are used during build can have their own goals. And one of these goals can "redo" what maven-resource-plugin did.

So I had a plugin vaadin-maven-plugin:

<plugin>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-maven-plugin</artifactId>
<version>${vaadin.plugin.version}</version>
<configuration>
    ...
</configuration>
<executions>
    <execution>
        <goals>
            <goal>resources</goal>
            <goal>compile</goal>
        </goals>
    </execution>
</executions>
</plugin>

And removal of a <goal>resources</goal> fixed the issue. And now mvn clean install filters properties in my gwt.xml correctly.

Hope this solution help those who will run at such an issue.

How to set property into gwt.xml file via maven properties?

2 Answers2