使用pax-exam时测试使用maven-scr-plugin创建的服务时出现问题

时间：2013-09-30 22:54:30

标签： java maven osgi pax-exam maven-scr-plugin

我已经设置了一个非常简单的“HelloWorld”服务来演示我的问题。它使用maven-scr-plugin生成服务描述符并进行pax-exam单元测试。但是当我尝试运行'mvn clean test'时它会阻塞一段时间然后再给我这个错误：

 org.ops4j.pax.swissbox.tracker.ServiceLookupException: gave up waiting for service com.liveops.examples.osgi.helloworld.HelloWorldService

如果我运行'mvn -DskipTests = true package'然后运行'mvn test'（不干净） 有用。差异似乎是在我的META-INF / M中增加了这一行 ANIFEST.MF文件：

 Service-Component: OSGI-INF/com.liveops.examples.osgi.helloworld.internal.HelloImpl.xml

有没有人知道是否有办法确保在构建过程的早期添加此行，以便'mvn clean test'将通过？或者还有其他一些我可能做错了吗？

供参考，这里是pom.xml，服务和单元测试。

    <?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>com.liveops.examples</groupId>
    <artifactId>HelloWorldService</artifactId>
    <version>1.0.0-SNAPSHOT</version>

    <packaging>bundle</packaging>

    <dependencies>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.core</artifactId>
            <version>4.3.1</version>
        </dependency>
        <dependency>
            <groupId>javax.inject</groupId>
            <artifactId>javax.inject</artifactId>
            <version>1</version>
        </dependency>
        <dependency>
            <groupId>org.ops4j.pax.exam</groupId>
            <artifactId>pax-exam</artifactId>
            <version>3.3.0</version>
        </dependency>
        <dependency>
             <groupId>org.ops4j.pax.exam</groupId>
             <artifactId>pax-exam-container-native</artifactId>
             <version>3.3.0</version>
             <scope>test</scope>
         </dependency>
        <dependency>
            <groupId>org.ops4j.pax.exam</groupId>
            <artifactId>pax-exam-junit4</artifactId>
            <version>3.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.ops4j.pax.url</groupId>
            <artifactId>pax-url-aether</artifactId>
            <version>1.6.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.ops4j.pax.exam</groupId>
            <artifactId>pax-exam-link-mvn</artifactId>
            <version>3.3.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.5.8</version>
        </dependency>
        <dependency>
            <groupId>org.apache.felix</groupId>
            <artifactId>org.apache.felix.framework</artifactId>
            <version>4.0.2</version>
            <scope>test</scope>
        </dependency>     
        <dependency>
            <groupId>org.apache.felix</groupId>
            <artifactId>org.apache.felix.scr.annotations</artifactId>
            <version>1.9.0</version>
        </dependency>
    </dependencies>

    <properties>
        <namespace>com.liveops.examples.osgi.helloworld</namespace>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.0</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>

            <plugin>
                <!--
                 | the following instructions build a simple set of public/private classes into an OSGi bundle
                -->
                <groupId>org.apache.felix</groupId>
                <artifactId>maven-bundle-plugin</artifactId>
                <version>2.3.7</version>
                <extensions>true</extensions>                
                <configuration>
                    <instructions>
                        <Bundle-SymbolicName>${project.name}</Bundle-SymbolicName>
                        <Bundle-Version>${project.version}</Bundle-Version>
                        <!-- Bundle-Activator>${namespace}.internal.HelloActivator</Bundle-Activator -->
                        <!--
                         | assume public classes are in the top package, and private classes are under ".internal"
                        -->
                        <Export-Package>!${namespace}.internal.*,${namespace}.*;version="${project.version}"</Export-Package>
                        <Private-Package>${namespace}.internal.*</Private-Package>
                        <!--
                         | each module can override these defaults in their osgi.bnd file
     -->
                        <!--_include>-osgi.bnd</_include-->
                    </instructions>
                </configuration>   
                <executions>
                    <execution>
                        <id>generate-manifest</id>
                        <phase>process-classes</phase>
                        <goals>
                            <goal>manifest</goal>
                        </goals>
                    </execution>
                </executions>          
            </plugin>
            <plugin>
                <groupId>org.apache.felix</groupId>
                <artifactId>maven-scr-plugin</artifactId>
                <version>1.9.0</version>
                <configuration>
                    <supportedProjectTypes>
                        <supportedProjectType>jar</supportedProjectType>
                        <supportedProjectType>bundle</supportedProjectType>
                        <supportedProjectType>war</supportedProjectType>
                    </supportedProjectTypes>
                    <generateAccessors>true</generateAccessors>
                    <strictMode>true</strictMode>
                    <specVersion>1.1</specVersion>
                    <outputDirectory>target/classes</outputDirectory>
                </configuration>
                <executions>
                    <execution>
                        <id>generate-scr-scrdescriptor</id>
                        <goals>
                            <goal>scr</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

HelloWorld实现类

package com.liveops.examples.osgi.helloworld.internal;

import com.liveops.examples.osgi.helloworld.HelloWorldService;
import org.apache.felix.scr.annotations.Service;
import org.apache.felix.scr.annotations.Component;


@Component
@Service(HelloWorldService.class)
public class HelloImpl implements HelloWorldService
{  
    public String helloWorld(String personalization)
    {
        return "Hello " + personalization + "!";
    }
}

单元测试

package com.liveops.examples.osgi.helloworld.internal;

import com.liveops.examples.osgi.helloworld.HelloWorldService;
import junit.framework.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;

import org.ops4j.pax.exam.Option;
import org.ops4j.pax.exam.Configuration;
import org.ops4j.pax.exam.junit.PaxExam;
import org.ops4j.pax.exam.util.PathUtils;

import javax.inject.Inject;

import static org.ops4j.pax.exam.CoreOptions.*;

@RunWith(PaxExam.class)
public class HelloImplTest
{
    @Inject
    HelloWorldService hws;

    @Configuration

    public static Option[] configuration() throws Exception{
            return options(
                    systemProperty("org.ops4j.pax.logging.DefaultServiceLog.level").value("WARN"),
                    mavenBundle("org.apache.felix", "org.apache.felix.scr", "1.6.2"),
                    bundle("reference:file:" + PathUtils.getBaseDir() + "/target/classes"),
                           junitBundles());
    }

    @Test
    public void testInjection()
    {
        Assert.assertNotNull(hws);
    }

    @Test
    public void testHelloWorld() throws Exception
    {
        Assert.assertNotNull(hws);
        Assert.assertEquals("Hello UnitTest!", hws.helloWorld("UnitTest"));

    }
}

3 个答案:

答案 0 :(得分：1)

使用ProbeBuilder增强测试包：

    @ProbeBuilder
public TestProbeBuilder probeConfiguration(TestProbeBuilder probe) {
    probe.setHeader("Service-Component", "OSGI-INF/com.liveops.examples.osgi.helloworld.internal.HelloImpl.xml");
    return probe;
}

这很可能就是缺少的一切。

编辑：

如果您尝试在同一个捆绑包中使用pax-exam，则需要在配置方法中执行某些操作：

streamBundle(bundle()
.add(SomceClass.class).add("OSGI-INF/com.liveops.examples.osgi.helloworld.internal.HelloImpl.xml", new File("src/main/resources/OSGI-INF/com.liveops.examples.osgi.helloworld.internal.HelloImpl.xml")
.toURL())
.set("Service-Component", "OSGI-INF/com.liveops.examples.osgi.helloworld.internal.HelloImpl.xml")
.build()).start()

可以在here

找到完整的样本

答案 1 :(得分：0)

我可能已经解决了这个问题，虽然看起来有点优雅。我可以明确地将 Service-Component 添加到pom文件的 maven-bundle-plugin 部分。

    <plugin>
        <groupId>org.apache.felix</groupId>
        <artifactId>maven-bundle-plugin</artifactId>
        <version>2.3.7</version>
        <extensions>true</extensions>                
        <configuration>
            <instructions>
                <Bundle-SymbolicName>${project.name}</Bundle-SymbolicName>
                <Bundle-Version>${project.version}</Bundle-Version>
                <Export-Package>!${namespace}.internal.*,${namespace}.*;version="${project.version}"</Export-Package>
                <Private-Package>${namespace}.internal.*</Private-Package>

                <!--Explicitly add the components no that they can be found in the test phase -->
                <Service-Component>OSGI-INF/com.liveops.examples.osgi.helloworld.internal.HelloImpl.xml</Service-Component>
            </instructions>
        </configuration>   
        <executions>
            <execution>
                <id>generate-manifest</id>
                <phase>process-classes</phase>
                <goals>
                    <goal>manifest</goal>
                </goals>
            </execution>
        </executions>          
    </plugin>

如果有人能想出更好的方法，请告诉我。

答案 2 :(得分：0)

Maven SCR插件只生成服务组件描述符，但它不会自动将它们包含在清单中。

因此，在Maven Bundle Plugin配置中包含<Service-Component>指令没有任何不雅之处，这只是documented usage。

由于缺少清单标题，SCR不会代表您的软件包注册任何服务，这就是Pax考试无法找到所需服务的原因。

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