codependent codependent - 7 months ago 37
Java Question

Maven archetype - Velocity error because of a colon

I am having trouble creating a Maven archetype because of the presence of a colon character (':') in one of the resources. I have a Spring XML that includes that symbol:

<property name="maxSize" value="${ws.client.pool.maxSize:5}"/>


When launching the archetype I get this error:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:2.2:generate
(default-cli) on project standalone-pom:
org.apache.maven.archetype.exception.ArchetypeGenerationFailure: Error merging velocity templates:
Encountered ":5}\"/>\n\t</bean>\n\t\n\t<bean id=\"fooServiceClient\" class=\"org.springframework.aop.framework.ProxyFactoryBean\">\n\t <property name=\"targetSource\" ref=\"fooServiceClientPoolTargetSource\"/>\n\t</bean>\n\n</beans>\n"
at line 15, column 69 of archetype-resources/src/main/resources/spring/library.ws-client.xml
[ERROR] Was expecting one of:
[ERROR] "}" ...
[ERROR] <DOT> ...
[ERROR] "(" ...
[ERROR] -> [Help 1]
[ERROR]


I tried configuring a escape character in the archetype's pom:

<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-archetype-plugin</artifactId>
<version>2.0</version>
</plugin>
<!-- Resources configuration -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.5</version>
<configuration>
<encoding>UTF-8</encoding>
<escapeString>\</escapeString>
</configuration>
</plugin>
</plugins>
</pluginManagement>


However it still doesn't work. In this case:

<property name="maxSize" value="${ws.client.pool.maxSize\:5}"/>


the error is as follows:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:2.2:generate
(default-cli) on project standalone-pom: org.apache.maven.archetype.exception.ArchetypeGenerationFailure:
Error merging velocity templates:
Encountered "\\" at line 15, column 69 of archetype-resources/src/main/resources/spring/library.ws-client.xml
[ERROR] Was expecting one of:
[ERROR] "}" ...
[ERROR] <DOT> ...
[ERROR] "(" ...
[ERROR] -> [Help 1]
[ERROR]


Any idea on how to escape that colon?

Answer

I worked out a solution based on a Velocity variable ($maxSize):

#set( $maxSize = '${ws.client.pool.maxSize:5}' )

<bean id="fooServiceClientPoolTargetSource" class="org.springframework.aop.target.CommonsPoolTargetSource">
    <property name="targetBeanName" value="fooServiceClientTarget"/>
    <property name="maxSize" value="$maxSize"/>