[Newbie] Help! spring and blazeds - can't start broker

[thelonesquirrely]

Hello,

I know there are a ton of issues already on this, but I can't seem to figure it out still. epic fail. Thanks for your help in advance!!

What is the problem you ask? I am getting a NPE when I try and start a message broker. I am mainly using the instructions and example from: http://www.springbyexample.org/examp...ex-webapp.html

I am trying to use tomcat 6. the error is from catalina.out

The error first - probably means a lot more to you. I have attached the full log.

INFO: BlazeDS - Community Edition: 3.2.0.3978
Mar 30, 2011 2:37:35 PM org.springframework.flex.core.MessageBrokerFactoryBean afterPropertiesSet
INFO: MessageBroker with id '_messageBroker' is starting.
Mar 30, 2011 2:37:35 PM org.springframework.beans.factory.support.DefaultSingletonBeanRegistry destroySingletons
INFO: Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@508b00d5: defining beans [_messageBrokerHandlerAdapter,_messageBrokerDefaultHandlerMapping,_jsonConfigMapEditorConfigurer,_messageBrokerMessagingProcessor,_flexRemotingAnnotationPostProcessor,_messageBrokerRemotingProcessor,org.springframework.flex.core.ExceptionTranslationAdvice#0,org.springframework.flex.core.EndpointServiceMessagePointcutAdvisor#0,org.springframework.flex.core.MessageInterceptionAdvice#0,org.springframework.flex.core.EndpointServiceMessagePointcutAdvisor#1,_messageBrokerEndpointProcessor,_messageBroker]; parent: org.springframework.beans.factory.support.DefaultListableBeanFactory@7f8be298
Mar 30, 2011 2:37:35 PM org.springframework.web.servlet.FrameworkServlet initServletBean
SEVERE: Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name '_messageBrokerDefaultHandlerMapping': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '_messageBroker': Invocation of init method failed; nested exception is org.springframework.beans.factory.BeanInitializationException: MessageBroker initialization failed; nested exception is java.lang.NullPointerException
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:557)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:842)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:416)
        at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:443)
        at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:459)
        at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:340)
        at ...

What I have is this:
pom:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
 
  <groupId>test.spring</groupId>
  <artifactId>flex</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
 
  <properties>
    <spring.version>3.0.0.RELEASE</spring.version>
  </properties>
  
  <dependencies>
      <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>
        <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jms</artifactId>
      <version>${spring.version}</version>
    </dependency>
        <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-orm</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.flex</groupId>
      <artifactId>spring-flex</artifactId>
      <version>1.0.3.RELEASE</version>
    </dependency>
  </dependencies>
</project>

Then the config files are simple and there is no code yet . Trying to be as simple as possible.
web.xml:

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">

  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/spring/web-application-context.xml</param-value>
  </context-param>
  
  
  <servlet>
    <servlet-name>SpringMessageBroker</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>/WEB-INF/spring/flex-servlet-context.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  
  <servlet-mapping>
    <servlet-name>SpringMessageBroker</servlet-name>
    <url-pattern>/messagebroker/*</url-pattern>
  </servlet-mapping>
  
</web-app>

flex-servlet-context.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:flex="http://www.springframework.org/schema/flex"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context 
                           http://www.springframework.org/schema/context/spring-context.xsd
                           http://www.springframework.org/schema/flex
                           http://www.springframework.org/schema/flex/spring-flex-1.0.xsd">
    <flex:message-broker/>
</beans>

web-application-context.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:camel="http://camel.apache.org/schema/spring"
       xmlns:broker="http://activemq.apache.org/schema/core"
       xmlns:flex="http://www.springframework.org/schema/flex"
       xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd
        http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd">

</beans>

and finally the services-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<services-config>
    <logging>
        <target class="flex.messaging.log.ConsoleTarget" level="Error">
            <properties>
                <prefix>[BlazeDS] </prefix>
                <includeDate>false</includeDate>
                <includeTime>false</includeTime>
                <includeLevel>false</includeLevel>
                <includeCategory>false</includeCategory>
            </properties>
            <filters>
                <pattern>Endpoint.*</pattern>
                <pattern>Service.*</pattern>
                <pattern>Configuration</pattern>
            </filters>
        </target>
    </logging>

    <system>
        <redeploy>
            <enabled>false</enabled>
        </redeploy>
    </system>

</services-config>

[thelonesquirrely]

Ok - so i changed the services-config.xml to be more like the default...

I am not sure if this is all necessary (i thought it wasn't...but results don't lie)

<?xml version="1.0" encoding="UTF-8"?>
<services-config>
  <services>
    <default-channels>
      <channel ref="my-amf" />
    </default-channels>
  </services>

  <channels>
    <channel-definition id="my-amf"
                        class="mx.messaging.channels.AMFChannel">
      <endpoint url="http://{server.name}:{server.port}/{context.root}/messagebroker/amf"
                class="flex.messaging.endpoints.AMFEndpoint" />                      
    </channel-definition>
  </channels>

  <logging>
    <target class="flex.messaging.log.ConsoleTarget" level="Error">
      <properties>
        <prefix>[BlazeDS] </prefix>
        <includeDate>false</includeDate>
        <includeTime>false</includeTime>
        <includeLevel>false</includeLevel>
        <includeCategory>false</includeCategory>
      </properties>
      <filters>
        <pattern>Endpoint.*</pattern>
        <pattern>Service.*</pattern>
        <pattern>Configuration</pattern>
      </filters>
    </target>
  </logging>

  <system>
    <redeploy>
      <enabled>false</enabled>
    </redeploy>
  </system>

</services-config>

[robbatt]

Think I got the same problem.

In my case the problem was that _messageBroker was initialized twice. Once by the ContextLoaderListener and once when the SpringDispatcherServlet parameter "contextConfigLocation" was explicitly set. Once I removed the parameter everything worked fine.