Question

我使用ServiceMix 3.5 我有多个ServiceAssemblies，每个都用于ServiceUnit。服务单元共有许多库，所以我在maven pom中用“提供”范围标记它们。共享库包含我希望服务单元共享的所有库。我根据以下maven pom.xml构建，但效果很简单：

抛出java.lang.ClassNotFoundException：类加载器中的org.apache.commons.dbcp.BasicDataSource org.apache.xbean.spring.context.FileSystemXmlApplicationContext

我可以做些什么（可能使用jbi-maven-plugin），以便我的服务单位可以使用共享库中的jar？

共享库服务单元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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>aaa.bbb</groupId>
  <artifactId>SHARED_SU</artifactId>
  <packaging>jbi-service-unit</packaging>
  <version>0.0.1-SNAPSHOT</version>

  <parent>
    <groupId>aaa.bbb</groupId>
    <artifactId>theParent</artifactId>
    <version>1.0-SNAPSHOT</version>
    <relativePath>../pom.xml</relativePath>
  </parent>

  <build>
    <defaultGoal>install</defaultGoal>
    <plugins/>
  </build>

  <properties><componentName>servicemix-camel</componentName></properties>

  <dependencies>
  ...
  </dependencies>
</project>

共享库服务单元pom：

<?xml version="1.0" encoding="UTF-8"?>
<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>aaa.bbb</groupId>
  <artifactId>SHARED_SA</artifactId>
  <packaging>jbi-shared-library</packaging>
  <version>0.0.1-SNAPSHOT</version>

  <parent>
    <groupId>aaa.bbb</groupId>
    <artifactId>theParent</artifactId>
    <version>1.0-SNAPSHOT</version>
    <relativePath>../pom.xml</relativePath>
  </parent>

  <dependencies>
    <dependency>
      <groupId>aaa.bbb</groupId>
      <artifactId>SHARED_SU</artifactId>
      <version>0.0.1-SNAPSHOT</version>
    </dependency>  
  </dependencies>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.servicemix.tooling</groupId>
        <artifactId>jbi-maven-plugin</artifactId>
        <version>3.2.3</version>
        <extensions>true</extensions>
        <configuration>
          <type>service-assembly</type>
          <classLoaderDelegation>parent-first</classLoaderDelegation>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

需要使用共享库的服务单元的Pom：

<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>aaa.bbb</groupId>
  <artifactId>theServiceUnit</artifactId>
  <packaging>jbi-service-unit</packaging>
  <version>0.0.1-SNAPSHOT</version>

  <parent>
    <groupId>aaa.bbb</groupId>
    <artifactId>theParent</artifactId>
    <version>1.0-SNAPSHOT</version>
    <relativePath>../pom.xml</relativePath>
  </parent>

  <build>
    <defaultGoal>install</defaultGoal>
    <plugins>
      <plugin>
        <groupId>org.apache.servicemix.tooling</groupId>
        <artifactId>jbi-maven-plugin</artifactId>
        <version>3.2.3</version>
        <extensions>true</extensions>
      </plugin>
    </plugins>
  </build>
  <dependencies>
    ... <!-- all "PROVIDED" in scope-->
  <properties>
    <componentName>servicemix-camel</componentName>
  </properties>
</project>

服务单位服务程序集的Pom

<?xml version="1.0" encoding="UTF-8"?>
<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>aaa.bbb</groupId>
  <artifactId>theServiceAssembly</artifactId>
  <packaging>jbi-service-assembly</packaging>
  <version>0.0.1-SNAPSHOT</version>

  <parent>
    <groupId>aaa.bbb</groupId>
    <artifactId>theParent</artifactId>
    <version>1.0-SNAPSHOT</version>
    <relativePath>../pom.xml</relativePath>
  </parent>

  <dependencies>
    <dependency>
      <groupId>aaa.bbb</groupId>
      <artifactId>theServiceUnit</artifactId>
      <version>0.0.1-SNAPSHOT</version>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.servicemix.tooling</groupId>
        <artifactId>jbi-maven-plugin</artifactId>
        <version>3.2.3</version>
        <extensions>true</extensions>
        <configuration>
          <type>service-assembly</type>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

Answer 1

我认为您误解了JBI Component / SharedLib / SA / SU或类加载器JBI的工作原理，请查看here以获取更多详细信息。

我无法理解“共享库服务单元pom”的含义，因为在每个JBI规范中，SharedLib不应该有任何服务单元，它只是由JBI组件引用，如servicemix-camel，all servicemix JBI组件仅引用一个默认的SharedLib，其名称为servicemix-shared。

类org.apache.commons.dbcp.BasicDataSource来自commons-dbcp.jar，但是commons-dbcp.jar不在smx3.x默认的sharedlib servicemix-shared中 - $ {version} -installer.zip，因此，默认情况下，除非您在SU的xbean.xml中明确添加<library>your_shared_lib_name</library>，否则所有servicemix-camel su都无法看到此类。

如何使用jbi-maven-plugin集成servicemix共享库？

1 个答案: