Karaf 中没有列出服务,可能是什么原因?
Services not listed in Karaf, what might be the reason?
我正在使用来自 OSGi Alliance、maven 和 Apache felix maven-scr 的 R6 OSGi 注释的组合-插件.
写完一个简单的包后,我在里面看不到任何服务(使用 Karaf webconsole 或 service:list)
低级别 API 同样适用于 BundleContext,我在其中手动注册了一个服务。
据我了解 maven-scr-plugin 在运行时为我生成清单和组件 XML 文件。
在下面的代码中,我希望服务 SimpleMathI 会在 Karaf 服务注册表中注册:
我错过了什么吗?
package test;
//notice i don't use apache.felix, since:
//"Starting with the R6 release of the OSGi Declarative Services and Metatype specification, the official annotations support the same
//features as the Apache Felix SCR annotations in a more elegant manner and even provide additional functionality."
import org.osgi.framework.BundleContext;
import org.osgi.service.component.ComponentContext;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Deactivate;
@Component
public class TestClass implements SimpleMathI {
public TestClass() {
System.out.println("contructing TestClass");
}
@Activate
protected void activate(ComponentContext c, BundleContext b) {
System.out.println("activate testClass");
}
@Deactivate
protected void deactivate() {
System.out.println("de-activate testClass");
}
public void doSimpleAdd(int x, int y) {
System.out.println("Result(TestClass): " + (x + y));
}
public void doSimpleSubstract(int x, int y) {
System.out.println("Result(TestClass): " + (x - y));
}
}
这是我的 pom 文件:
<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</groupId>
<artifactId>DStestDS</artifactId>
<version>0.0.5</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-scr-plugin</artifactId>
<version>1.20.0</version>
<executions>
<execution>
<id>generate-scr-scrdescriptor</id>
<goals>
<goal>scr</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.core</artifactId>
<version>4.3.0</version>
</dependency>
<!-- official R6 osgi annotations -->
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.service.component.annotations</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.compendium</artifactId>
<version>5.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.felix</groupId>
<artifactId>org.apache.felix.scr.annotations</artifactId>
<version>1.9.6</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
您是否忘记安装 scr 功能?
feature:install scr
你的pom好像也坏了。您需要使用 maven-bundle-plugin 或 bnd-maven-plugin。如果您使用 OSGi 规范 DS 注释,则不需要 maven scr 插件。
这是我在构建中使用的:
https://github.com/cschneider/Karaf-Tutorial/blob/master/tasklist-ds/pom.xml#L107-L118
它创建包并处理 DS 规范注释。
根据 Christian 的建议,我将 maven-bundle-plugin 添加到 pom.xml 文件并删除了 maven-scr-plugin,现在 pom.xml 如下所示:
<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</groupId>
<artifactId>DStestDS</artifactId>
<version>0.0.10</version>
<dependencies>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.core</artifactId>
<version>4.3.0</version>
</dependency>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.service.component.annotations</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.compendium</artifactId>
<version>5.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.5.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<version>3.0.0</version>
<extensions>true</extensions>
<configuration>
<obrRepository>NONE</obrRepository>
<instructions>
<_include>-bnd.bnd</_include>
</instructions>
</configuration>
</plugin>
</plugins>
</build>
</project>
这是控制台的输出:
no services listed
所以我无法理解何时以及为何注册服务?为什么没有调用@Activate 方法?
顺便说一句,我没有得到任何编译错误,我也不做 "Export->Deployable plug-ins" 项目,我只是做 mvn clean install 获取输出 jar 文件并放入Karaf的delploy文件夹中。
生成捆绑文件后,我查看了它,发现 META-INF\MANIFEST.MF 看起来像:
Manifest-Version: 1.0
Built-By: username
Build-Jdk: 1.7.0_79
Created-By: Apache Maven 3.3.9
Archiver-Version: Plexus Archiver
好像少了点什么吧?
而且我没有看到通过 karaf webconsole 列出的任何服务:
karaf webconsole
我正在使用来自 OSGi Alliance、maven 和 Apache felix maven-scr 的 R6 OSGi 注释的组合-插件.
写完一个简单的包后,我在里面看不到任何服务(使用 Karaf webconsole 或 service:list)
低级别 API 同样适用于 BundleContext,我在其中手动注册了一个服务。
据我了解 maven-scr-plugin 在运行时为我生成清单和组件 XML 文件。
在下面的代码中,我希望服务 SimpleMathI 会在 Karaf 服务注册表中注册: 我错过了什么吗?
package test;
//notice i don't use apache.felix, since:
//"Starting with the R6 release of the OSGi Declarative Services and Metatype specification, the official annotations support the same
//features as the Apache Felix SCR annotations in a more elegant manner and even provide additional functionality."
import org.osgi.framework.BundleContext;
import org.osgi.service.component.ComponentContext;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Deactivate;
@Component
public class TestClass implements SimpleMathI {
public TestClass() {
System.out.println("contructing TestClass");
}
@Activate
protected void activate(ComponentContext c, BundleContext b) {
System.out.println("activate testClass");
}
@Deactivate
protected void deactivate() {
System.out.println("de-activate testClass");
}
public void doSimpleAdd(int x, int y) {
System.out.println("Result(TestClass): " + (x + y));
}
public void doSimpleSubstract(int x, int y) {
System.out.println("Result(TestClass): " + (x - y));
}
}
这是我的 pom 文件:
<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</groupId>
<artifactId>DStestDS</artifactId>
<version>0.0.5</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-scr-plugin</artifactId>
<version>1.20.0</version>
<executions>
<execution>
<id>generate-scr-scrdescriptor</id>
<goals>
<goal>scr</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.core</artifactId>
<version>4.3.0</version>
</dependency>
<!-- official R6 osgi annotations -->
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.service.component.annotations</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.compendium</artifactId>
<version>5.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.felix</groupId>
<artifactId>org.apache.felix.scr.annotations</artifactId>
<version>1.9.6</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
您是否忘记安装 scr 功能?
feature:install scr
你的pom好像也坏了。您需要使用 maven-bundle-plugin 或 bnd-maven-plugin。如果您使用 OSGi 规范 DS 注释,则不需要 maven scr 插件。
这是我在构建中使用的: https://github.com/cschneider/Karaf-Tutorial/blob/master/tasklist-ds/pom.xml#L107-L118
它创建包并处理 DS 规范注释。
根据 Christian 的建议,我将 maven-bundle-plugin 添加到 pom.xml 文件并删除了 maven-scr-plugin,现在 pom.xml 如下所示:
<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</groupId>
<artifactId>DStestDS</artifactId>
<version>0.0.10</version>
<dependencies>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.core</artifactId>
<version>4.3.0</version>
</dependency>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.service.component.annotations</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.compendium</artifactId>
<version>5.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.5.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<version>3.0.0</version>
<extensions>true</extensions>
<configuration>
<obrRepository>NONE</obrRepository>
<instructions>
<_include>-bnd.bnd</_include>
</instructions>
</configuration>
</plugin>
</plugins>
</build>
</project>
这是控制台的输出: no services listed
所以我无法理解何时以及为何注册服务?为什么没有调用@Activate 方法?
顺便说一句,我没有得到任何编译错误,我也不做 "Export->Deployable plug-ins" 项目,我只是做 mvn clean install 获取输出 jar 文件并放入Karaf的delploy文件夹中。
生成捆绑文件后,我查看了它,发现 META-INF\MANIFEST.MF 看起来像:
Manifest-Version: 1.0
Built-By: username
Build-Jdk: 1.7.0_79
Created-By: Apache Maven 3.3.9
Archiver-Version: Plexus Archiver
好像少了点什么吧?
而且我没有看到通过 karaf webconsole 列出的任何服务:
karaf webconsole