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 | < module xmlns = "urn:jboss:module:1.3" name = "org.springframework" slot = "3.2.5.RELEASE" > |
03 | < resource-root path = "aopalliance-1.0.jar" /> |
04 | < resource-root path = "aspectjrt-1.7.4.jar" /> |
05 | < resource-root path = "aspectjtools-1.7.4.jar" /> |
06 | < resource-root path = "aspectjweaver-1.7.4.jar" /> |
07 | < resource-root path = "org.aspectj.matcher-1.7.4.jar" /> |
08 | < resource-root path = "spring-aop-3.2.5.RELEASE.jar" /> |
09 | < resource-root path = "spring-aspects-3.2.5.RELEASE.jar" /> |
10 | < resource-root path = "spring-beans-3.2.5.RELEASE.jar" /> |
11 | < resource-root path = "spring-context-3.2.5.RELEASE.jar" /> |
12 | < resource-root path = "spring-context-support-3.2.5.RELEASE.jar" /> |
13 | < resource-root path = "spring-core-3.2.5.RELEASE.jar" /> |
14 | < resource-root path = "spring-expression-3.2.5.RELEASE.jar" /> |
15 | < resource-root path = "spring-jdbc-3.2.5.RELEASE.jar" /> |
16 | < resource-root path = "spring-orm-3.2.5.RELEASE.jar" /> |
17 | < resource-root path = "spring-oxm-3.2.5.RELEASE.jar" /> |
18 | < resource-root path = "spring-tx-3.2.5.RELEASE.jar" /> |
19 | < resource-root path = "spring-web-3.2.5.RELEASE.jar" /> |
20 | < resource-root path = "spring-webmvc-3.2.5.RELEASE.jar" /> |
21 | < resource-root path = "spring-webmvc-portlet-3.2.5.RELEASE.jar" /> |
25 | < module name = "javaee.api" /> |
26 | < module name = "org.apache.commons.logging" /> |
27 | < module name = "org.jboss.vfs" /> |
28 | < module name = "org.hibernate" /> |
29 | < module name = "javax.el.api" export = "true" /> |
30 | < module name = "com.sun.xml.bind" export = "true" /> |
- 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:
- $> mkdir -p modules/org/apache/camel/2.12.1
- Inside this new directory, create module.xml file with this content:
01 | < module xmlns = "urn:jboss:module:1.3" name = "org.apache.camel" slot = "2.12.1" > |
03 | < resource-root path = "camel-core-2.12.1.jar" /> |
04 | < resource-root path = "camel-spring-2.12.1.jar" /> |
05 | < resource-root path = "jaxb-impl-2.2.6.jar" /> |
08 | < module name = "org.springframework" slot = "3.2.5.RELEASE" /> |
09 | < module name = "org.slf4j" /> |
10 | < module name = "javax.xml.bind.api" /> |
11 | < module name = "javax.api" /> |
12 | < module name = "sun.jdk" /> |
- Then add all the JARs mentioned as “resource-root” inside this new directory
- You are DONE with Camel module!!!
- Now you can reference camel module using the next line in your “jboss-deployment-structure.xml”, from your EAR/WAR:
- <module name=”org.apache.camel” slot=”2.12.1″ />
You may cut out a few jar dependencies from Spring or Camel module, but these are just my current settings and I know it works!
One more important note. While I was trying to found the correct JARs for these modules, I met a few exceptions… So, if you forget any JAR, then you may see any of these exceptions:
01 | Caused by: java.lang.NoClassDefFoundError: sun/misc/Unsafe |
02 | at org.apache.camel.com.googlecode.concurrentlinkedhashmap.ConcurrentHashMapV8.getUnsafe(ConcurrentHashMapV8.java:4136) [camel-core-2.12.1.jar:2.12.1] |
03 | at org.apache.camel.com.googlecode.concurrentlinkedhashmap.ConcurrentHashMapV8.<clinit>(ConcurrentHashMapV8.java:4101) [camel-core-2.12.1.jar:2.12.1] |
04 | at org.apache.camel.com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap.<init>(ConcurrentLinkedHashMap.java:221) [camel-core-2.12.1.jar:2.12.1] |
05 | at org.apache.camel.com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap.<init>(ConcurrentLinkedHashMap.java:104) [camel-core-2.12.1.jar:2.12.1] |
06 | at org.apache.camel.com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Builder.build(ConcurrentLinkedHashMap.java:1634) [camel-core-2.12.1.jar:2.12.1] |
07 | at org.apache.camel.util.LRUCache.<init>(LRUCache.java:83) [camel-core-2.12.1.jar:2.12.1] |
08 | at org.apache.camel.util.LRUSoftCache.<init>(LRUSoftCache.java:68) [camel-core-2.12.1.jar:2.12.1] |
09 | at org.apache.camel.impl.EndpointRegistry.<init>(EndpointRegistry.java:39) [camel-core-2.12.1.jar:2.12.1] |
10 | at org.apache.camel.impl.DefaultCamelContext.<init>(DefaultCamelContext.java:234) [camel-core-2.12.1.jar:2.12.1] |
11 | at org.apache.camel.spring.SpringCamelContext.<init>(SpringCamelContext.java:67) [camel-spring-2.12.1.jar:2.12.1] |
12 | at org.apache.camel.spring.CamelContextFactoryBean.newCamelContext(CamelContextFactoryBean.java:356) [camel-spring-2.12.1.jar:2.12.1] |
13 | at org.apache.camel.spring.CamelContextFactoryBean.createContext(CamelContextFactoryBean.java:350) [camel-spring-2.12.1.jar:2.12.1] |
14 | at org.apache.camel.spring.CamelContextFactoryBean.getContext(CamelContextFactoryBean.java:361) [camel-spring-2.12.1.jar:2.12.1] |
15 | at org.apache.camel.spring.CamelContextFactoryBean.getContext(CamelContextFactoryBean.java:80) [camel-spring-2.12.1.jar:2.12.1] |
16 | at org.apache.camel.core.xml.AbstractCamelContextFactoryBean.getContext(AbstractCamelContextFactoryBean.java:518) [camel-spring-2.12.1.jar:2.12.1] |
17 | at org.apache.camel.core.xml.AbstractCamelContextFactoryBean.afterPropertiesSet(AbstractCamelContextFactoryBean.java:160) [camel-spring-2.12.1.jar:2.12.1] |
18 | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1571) [spring-beans-3.2.5.RELEASE.jar:3.2.5.RELEASE] |
19 | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1509) [spring-beans-3.2.5.RELEASE.jar:3.2.5.RELEASE] |
21 | Caused 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))] |
22 | at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:197) [jboss-modules.jar:1.3.0.Final] |
OR
01 | Caused by: java.lang.NoClassDefFoundError: org/w3c/dom/Node |
02 | at java.lang.Class.getDeclaredConstructors0(Native Method) [rt.jar:1.7.0_40] |
03 | at java.lang.Class.privateGetDeclaredConstructors(Class.java:2483) [rt.jar:1.7.0_40] |
04 | at java.lang.Class.getConstructor0(Class.java:2793) [rt.jar:1.7.0_40] |
05 | at java.lang.Class.getDeclaredConstructor(Class.java:2043) [rt.jar:1.7.0_40] |
06 | at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:105) |
07 | at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.resolve(DefaultNamespaceHandlerResolver.java:129) |
09 | Caused 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))] |
10 | at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:197) [jboss-modules.jar:1.3.0.Final] |
OR
01 | Caused by: java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException |
02 | at java.lang.Class.getDeclaredConstructors0(Native Method) [rt.jar:1.7.0_40] |
03 | at java.lang.Class.privateGetDeclaredConstructors(Class.java:2483) [rt.jar:1.7.0_40] |
04 | at java.lang.Class.getConstructor0(Class.java:2793) [rt.jar:1.7.0_40] |
05 | at java.lang.Class.getDeclaredConstructor(Class.java:2043) [rt.jar:1.7.0_40] |
06 | at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:105) |
07 | at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.resolve(DefaultNamespaceHandlerResolver.java:129) |
09 | Caused 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))] |
10 | at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:197) [jboss-modules.jar:1.3.0.Final] |
Hope it helps!