I'm writing a client (library) to consume a REST service in order to give users of the library simple get and set methods to work with, hiding complexities of REST APIs.
I'm using jackson 2.4.0 and jersey 2.6 to consume the REST service.
The goal is to create a uber.jar which will be a self-contained jar file with all the dependencies resolved. To achieve this, I'm using Maven shade plugin. i'm also relocating all the dependent classes using the shade plugin.
My pom file is as below :
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<jackson.version>2.4.0</jackson.version>
<jersey.version>2.6</jersey.version>
</properties>
<build>
<plugins>
<!-- Shade plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.3</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<relocations>
<relocation>
<pattern>org</pattern>
<shadedPattern>shaded.org</shadedPattern>
</relocation>
<relocation>
<pattern>com</pattern>
<shadedPattern>shaded.com</shadedPattern>
<excludes>
<exclude>com.example.*</exclude>
</excludes>
</relocation>
<relocation>
<pattern>javax</pattern>
<shadedPattern>shaded.javax</shadedPattern>
<excludes>
<exclude>javax.xml.*</exclude>
</excludes>
</relocation>
<relocation>
<pattern>jersey</pattern>
<shadedPattern>shaded.jersey</shadedPattern>
</relocation>
<relocation>
<pattern>javassist</pattern>
<shadedPattern>shaded.javassist</shadedPattern>
</relocation>
</relocations>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
<transformer
implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>META-INF/.*</resource>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
<!-- Shade plugin -->
</plugins>
</build>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-client</artifactId>
<version>${jersey.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.jaxrs</groupId>
<artifactId>jackson-jaxrs-json-provider</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.3.2</version>
</dependency>
</dependencies>
If i write a test class within the same project in which this library is, everything works fine. But, if i when i use this shaded library in a separate standalone project (which is what the goal is), i get following exception :
Feb 06, 2015 5:28:07 PM shaded.org.glassfish.hk2.internal.ServiceLocatorFactoryImpl getGenerator
WARNING: Cannot find a default implementation of the HK2 ServiceLocatorGenerator
Feb 06, 2015 5:28:08 PM shaded.org.glassfish.jersey.internal.Errors logErrors
WARNING: The following warnings have been detected: WARNING: HK2 service reification failed for [shaded.org.glassfish.jersey.message.internal.DataSourceProvider] with an exception:
MultiException stack 1 of 2
java.lang.NoClassDefFoundError: shaded/javax/activation/DataSource
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
at java.lang.Class.getDeclaredConstructors(Unknown Source)
at shaded.org.jvnet.hk2.internal.Utilities$7.run(Utilities.java:1316)
at shaded.org.jvnet.hk2.internal.Utilities$7.run(Utilities.java:1312)
at java.security.AccessController.doPrivileged(Native Method)
at shaded.org.jvnet.hk2.internal.Utilities.getAllConstructors(Utilities.java:1312)
at shaded.org.jvnet.hk2.internal.Utilities.findProducerConstructor(Utilities.java:1233)
at shaded.org.jvnet.hk2.internal.DefaultClassAnalyzer.getConstructor(DefaultClassAnalyzer.java:78)
at shaded.org.glassfish.jersey.internal.inject.JerseyClassAnalyzer.getConstructor(JerseyClassAnalyzer.java:143)
at shaded.org.jvnet.hk2.internal.Utilities.getConstructor(Utilities.java:203)
at shaded.org.jvnet.hk2.internal.ClazzCreator.initialize(ClazzCreator.java:147)
at shaded.org.jvnet.hk2.internal.ClazzCreator.initialize(ClazzCreator.java:200)
at shaded.org.jvnet.hk2.internal.SystemDescriptor.internalReify(SystemDescriptor.java:649)
........
........
Caused by: java.lang.ClassNotFoundException: shaded.javax.activation.DataSource
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 65 more
MultiException stack 2 of 2
java.lang.IllegalArgumentException: Errors were discovered while reifying SystemDescriptor(
implementation=shaded.org.glassfish.jersey.message.internal.DataSourceProvider
contracts={shaded.javax.ws.rs.ext.MessageBodyWriter,shaded.javax.ws.rs.ext.MessageBodyReader}
scope=shaded.javax.inject.Singleton
qualifiers={}
descriptorType=CLASS
descriptorVisibility=NORMAL
metadata=
rank=0
loader=shaded.org.glassfish.hk2.utilities.binding.AbstractBinder$2@4fb64261
proxiable=null
proxyForSameScope=null
analysisName=null
id=10
locatorId=1
identityHashCode=1113619023
reified=false)
at shaded.org.jvnet.hk2.internal.SystemDescriptor.reify(SystemDescriptor.java:615)
at shaded.org.jvnet.hk2.internal.ServiceLocatorImpl.reifyDescriptor(ServiceLocatorImpl.java:405)
at shaded.org.jvnet.hk2.internal.ServiceLocatorImpl.narrow(ServiceLocatorImpl.java:2046)
at shaded.org.jvnet.hk2.internal.ServiceLocatorImpl.access$700(ServiceLocatorImpl.java:116)
at shaded.org.jvnet.hk2.internal.ServiceLocatorImpl$8.compute(ServiceLocatorImpl.java:1207)
at shaded.org.jvnet.hk2.internal.ServiceLocatorImpl$8.compute(ServiceLocatorImpl.java:1202)
Any help will be appreciated.
Thanks.
