Issue
I have a Maven based Spring-WS client project that I want to package as a single jar. In eclipse, everything runs properly. When I try to package it as an executable jar, I get ClassNotFound exceptions since the Spring jars are not included in my application jar.
So I added the maven-shade-plugin to include all my dependencies in my application jar. When I look at my app jar, I see all the class files from all the dependencies included (all the library jar's are exploded).
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>com.cws.cs.Client</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>1.7</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
My problem is that in the packaging process, my multiple spring dependencies have different META-INF/spring.schemas files that override each other. Consequently, my final jar has an incomplete spring.schemas file.
So when I try to run my executable jar, I get Spring error messages that files cannot be found since the spring.schemas file is incomplete (the Spring-WS's jar has overriden the Spring-core's spring.schemas file).
My executable jar's META-INF/spring.schemas:
http\://www.springframework.org/schema/web-services/web-services-1.5.xsd=/org/springframework/ws/config/web-services-1.5.xsd
http\://www.springframework.org/schema/web-services/web-services-2.0.xsd=/org/springframework/ws/config/web-services-2.0.xsd
http\://www.springframework.org/schema/web-services/web-services.xsd=/org/springframework/ws/config/web-services-2.0.xsd
Instead of Spring-beans.jar META-INF/spring.schemas:
http\://www.springframework.org/schema/beans/spring-beans-2.0.xsd=org/springframework/beans/factory/xml/spring-beans-2.0.xsd
http\://www.springframework.org/schema/beans/spring-beans-2.5.xsd=org/springframework/beans/factory/xml/spring-beans-2.5.xsd
http\://www.springframework.org/schema/beans/spring-beans-3.0.xsd=org/springframework/beans/factory/xml/spring-beans-3.0.xsd
http\://www.springframework.org/schema/beans/spring-beans-3.1.xsd=org/springframework/beans/factory/xml/spring-beans-3.1.xsd
http\://www.springframework.org/schema/beans/spring-beans.xsd=org/springframework/beans/factory/xml/spring-beans-3.1.xsd
http\://www.springframework.org/schema/tool/spring-tool-2.0.xsd=org/springframework/beans/factory/xml/spring-tool-2.0.xsd
http\://www.springframework.org/schema/tool/spring-tool-2.5.xsd=org/springframework/beans/factory/xml/spring-tool-2.5.xsd
http\://www.springframework.org/schema/tool/spring-tool-3.0.xsd=org/springframework/beans/factory/xml/spring-tool-3.0.xsd
http\://www.springframework.org/schema/tool/spring-tool-3.1.xsd=org/springframework/beans/factory/xml/spring-tool-3.1.xsd
http\://www.springframework.org/schema/tool/spring-tool.xsd=org/springframework/beans/factory/xml/spring-tool-3.1.xsd
http\://www.springframework.org/schema/util/spring-util-2.0.xsd=org/springframework/beans/factory/xml/spring-util-2.0.xsd
http\://www.springframework.org/schema/util/spring-util-2.5.xsd=org/springframework/beans/factory/xml/spring-util-2.5.xsd
http\://www.springframework.org/schema/util/spring-util-3.0.xsd=org/springframework/beans/factory/xml/spring-util-3.0.xsd
http\://www.springframework.org/schema/util/spring-util-3.1.xsd=org/springframework/beans/factory/xml/spring-util-3.1.xsd
http\://www.springframework.org/schema/util/spring-util.xsd=org/springframework/beans/factory/xml/spring-util-3.1.xsd
I'm stumped. I am not sure if/how I can package everything as a single executable jar. I don't know if this is a shade-plugin configuration issue, or if I am trying to do something impossible. It would not seem correct that I would have to manually create my own spring.schemas file (a concatenation of the others).
I may have jumped the gun a little. In digging up more info on the shade plugin, I noticed the AppendingTransformer that I had previously missed. However, my concern is how to know which other files are having the same problems? I've discovered/caught this particular Spring issue. I have no idea about any other libraries that may be doing something similar...
Any suggestions would be appreciated.
Solution
Instead of maven-shade-plugin use onejar-maven-plugin. One-JAR lets you package a Java application together with its dependency Jars into a single executable Jar file.
Answered By - amra
Answer Checked By - Candace Johnson (JavaFixing Volunteer)