These days I am playing with Wildfly and Apache Camel and Spring.
A simple way to communicate between EARs / WARs is using direct-vm component of Camel. There are many ways to achieve this with or without Camel. Camel works like a charm in WildFly without any need for extra configurations. Camel is great!!!
In order to avoid pack all required JARs of Spring and Camel with my applications, I create two modules, using the great JBoss Modules framework (which is already used by WildFly). Then I can reference these two frameworks, without the need to pack all these JARs inside my applications (EAR/WAR).
Create Spring module
- Go to WildFly home dir: $> cd /home/torun/jboss/wildfly/wildfly-8.0.0.Beta1
- Create Spring module directory structure:
- $> mkdir -p modules/org/springframework/3.2.5.RELEASE
- Inside this new directory, create module.xml file with this content:
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | <module xmlns="urn:jboss:module:1.3" name="org.springframework" slot="3.2.5.RELEASE"> <resources> <resource-root path="aopalliance-1.0.jar"/> <resource-root path="aspectjrt-1.7.4.jar"/> <resource-root path="aspectjtools-1.7.4.jar"/> <resource-root path="aspectjweaver-1.7.4.jar"/> <resource-root path="org.aspectj.matcher-1.7.4.jar"/> <resource-root path="spring-aop-3.2.5.RELEASE.jar"/> <resource-root path="spring-aspects-3.2.5.RELEASE.jar"/> <resource-root path="spring-beans-3.2.5.RELEASE.jar"/> <resource-root path="spring-context-3.2.5.RELEASE.jar"/> <resource-root path="spring-context-support-3.2.5.RELEASE.jar"/> <resource-root path="spring-core-3.2.5.RELEASE.jar"/> <resource-root path="spring-expression-3.2.5.RELEASE.jar"/> <resource-root path="spring-jdbc-3.2.5.RELEASE.jar"/> <resource-root path="spring-orm-3.2.5.RELEASE.jar"/> <resource-root path="spring-oxm-3.2.5.RELEASE.jar"/> <resource-root path="spring-tx-3.2.5.RELEASE.jar"/> <resource-root path="spring-web-3.2.5.RELEASE.jar"/> <resource-root path="spring-webmvc-3.2.5.RELEASE.jar"/> <resource-root path="spring-webmvc-portlet-3.2.5.RELEASE.jar"/> </resources> <dependencies> <module name="javaee.api"/> <module name="org.apache.commons.logging"/> <module name="org.jboss.vfs"/> <module name="org.hibernate"/> <module name="javax.el.api" export="true"/> <module name="com.sun.xml.bind" export="true"/> </dependencies></module> |
- Then add all the JARs mentioned as “resource-root” inside this new directory
- You are DONE with Spring module!!!
- Now you can reference spring module using the next line in your “jboss-deployment-structure.xml”, from your EAR/WAR:
- <module name=”org.springframework” slot=”3.2.5.RELEASE”/>
Create Camel module
- Create Camel module directory structure:
- $> mkdir -p modules/org/apache/camel/2.12.1
- Inside this new directory, create module.xml file with this content:
01 02 03 04 05 06 07 08 09 10 11 12 13 14 | <module xmlns="urn:jboss:module:1.3" name="org.apache.camel" slot="2.12.1"> <resources> <resource-root path="camel-core-2.12.1.jar"/> <resource-root path="camel-spring-2.12.1.jar"/> <resource-root path="jaxb-impl-2.2.6.jar"/> </resources> <dependencies> <module name="org.springframework" slot="3.2.5.RELEASE" /> <module name="org.slf4j"/> <module name="javax.xml.bind.api"/> <module name="javax.api"/> <module name="sun.jdk" /> </dependencies></module> |
- Then add all the JARs mentioned as “resource-root” inside this new directory
- You are DONE with Camel module!!!
- Now you can reference camel module using the next line in your “jboss-deployment-structure.xml”, from your EAR/WAR:
- <module name=”org.apache.camel” slot=”2.12.1″ />
You may cut out a few jar dependencies from Spring or Camel module, but these are just my current settings and I know it works!
One more important note. While I was trying to found the correct JARs for these modules, I met a few exceptions… So, if you forget any JAR, then you may see any of these exceptions:
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | Caused by: java.lang.NoClassDefFoundError: sun/misc/Unsafe at org.apache.camel.com.googlecode.concurrentlinkedhashmap.ConcurrentHashMapV8.getUnsafe(ConcurrentHashMapV8.java:4136) [camel-core-2.12.1.jar:2.12.1] at org.apache.camel.com.googlecode.concurrentlinkedhashmap.ConcurrentHashMapV8.<clinit>(ConcurrentHashMapV8.java:4101) [camel-core-2.12.1.jar:2.12.1] at org.apache.camel.com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap.<init>(ConcurrentLinkedHashMap.java:221) [camel-core-2.12.1.jar:2.12.1] at org.apache.camel.com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap.<init>(ConcurrentLinkedHashMap.java:104) [camel-core-2.12.1.jar:2.12.1] at org.apache.camel.com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Builder.build(ConcurrentLinkedHashMap.java:1634) [camel-core-2.12.1.jar:2.12.1] at org.apache.camel.util.LRUCache.<init>(LRUCache.java:83) [camel-core-2.12.1.jar:2.12.1] at org.apache.camel.util.LRUSoftCache.<init>(LRUSoftCache.java:68) [camel-core-2.12.1.jar:2.12.1] at org.apache.camel.impl.EndpointRegistry.<init>(EndpointRegistry.java:39) [camel-core-2.12.1.jar:2.12.1] at org.apache.camel.impl.DefaultCamelContext.<init>(DefaultCamelContext.java:234) [camel-core-2.12.1.jar:2.12.1] at org.apache.camel.spring.SpringCamelContext.<init>(SpringCamelContext.java:67) [camel-spring-2.12.1.jar:2.12.1] at org.apache.camel.spring.CamelContextFactoryBean.newCamelContext(CamelContextFactoryBean.java:356) [camel-spring-2.12.1.jar:2.12.1] at org.apache.camel.spring.CamelContextFactoryBean.createContext(CamelContextFactoryBean.java:350) [camel-spring-2.12.1.jar:2.12.1] at org.apache.camel.spring.CamelContextFactoryBean.getContext(CamelContextFactoryBean.java:361) [camel-spring-2.12.1.jar:2.12.1] at org.apache.camel.spring.CamelContextFactoryBean.getContext(CamelContextFactoryBean.java:80) [camel-spring-2.12.1.jar:2.12.1] at org.apache.camel.core.xml.AbstractCamelContextFactoryBean.getContext(AbstractCamelContextFactoryBean.java:518) [camel-spring-2.12.1.jar:2.12.1] at org.apache.camel.core.xml.AbstractCamelContextFactoryBean.afterPropertiesSet(AbstractCamelContextFactoryBean.java:160) [camel-spring-2.12.1.jar:2.12.1] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1571) [spring-beans-3.2.5.RELEASE.jar:3.2.5.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1509) [spring-beans-3.2.5.RELEASE.jar:3.2.5.RELEASE] ... 23 moreCaused by: java.lang.ClassNotFoundException: sun.misc.Unsafe from [Module "org.apache.camel:2.12.1" from local module loader @1a6e5d5 (finder: local module finder @3b3402 (roots: /home/torun/jboss/wildfly/wildfly-8.0.0.Beta1/modules,/home/torun/jboss/wildfly/wildfly-8.0.0.Beta1/modules/system/layers/base))] at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:197) [jboss-modules.jar:1.3.0.Final] ... |
OR
01 02 03 04 05 06 07 08 09 10 11 | Caused by: java.lang.NoClassDefFoundError: org/w3c/dom/Node at java.lang.Class.getDeclaredConstructors0(Native Method) [rt.jar:1.7.0_40] at java.lang.Class.privateGetDeclaredConstructors(Class.java:2483) [rt.jar:1.7.0_40] at java.lang.Class.getConstructor0(Class.java:2793) [rt.jar:1.7.0_40] at java.lang.Class.getDeclaredConstructor(Class.java:2043) [rt.jar:1.7.0_40] at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:105) at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.resolve(DefaultNamespaceHandlerResolver.java:129) ... 29 moreCaused by: java.lang.ClassNotFoundException: org.w3c.dom.Node from [Module "org.apache.camel:2.12.1" from local module loader @1a6e5d5 (finder: local module finder @3b3402 (roots: /home/torun/jboss/wildfly/wildfly-8.0.0.Beta1/modules,/home/torun/jboss/wildfly/wildfly-8.0.0.Beta1/modules/system/layers/base))] at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:197) [jboss-modules.jar:1.3.0.Final] ... |
OR
01 02 03 04 05 06 07 08 09 10 11 | Caused by: java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException at java.lang.Class.getDeclaredConstructors0(Native Method) [rt.jar:1.7.0_40] at java.lang.Class.privateGetDeclaredConstructors(Class.java:2483) [rt.jar:1.7.0_40] at java.lang.Class.getConstructor0(Class.java:2793) [rt.jar:1.7.0_40] at java.lang.Class.getDeclaredConstructor(Class.java:2043) [rt.jar:1.7.0_40] at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:105) at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.resolve(DefaultNamespaceHandlerResolver.java:129) ... 29 moreCaused by: java.lang.ClassNotFoundException: javax.xml.bind.JAXBException from [Module "org.apache.camel:2.12.1" from local module loader @1a6e5d5 (finder: local module finder @3b3402 (roots: /home/torun/jboss/wildfly/wildfly-8.0.0.Beta1/modules,/home/torun/jboss/wildfly/wildfly-8.0.0.Beta1/modules/system/layers/base))] at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:197) [jboss-modules.jar:1.3.0.Final] ... |
Hope it helps!
Reference: Add Apache Camel and Spring as jboss modules in WildFly from our JCG partner Adrianos Dadis at the Java, Integration and the virtues of source blog.
Are you still able to make this work in version 8.1 of Wildfly? I keep getting;
Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/context]
The required files are all there.
Hi Michael,
Did you fix this error? Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/context].
Thanks.