在 Jboss Fuse 6.3 上实现 REST OSGI 服务

Question

嗨，我正在尝试实现一个简单的 Rest 服务，该服务 returns JSON 对保险丝的响应。以下是我的 POM.xml

  <?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>org.fuse.test</groupId>
<artifactId>fuse-hw</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>bundle</packaging>

<dependencies>
    <dependency>
        <groupId>org.apache.camel</groupId>
        <artifactId>camel-cxf</artifactId>
        <version>2.15.0</version>
    </dependency>
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-jaxrs</artifactId>
        <version>1.9.10</version>
    </dependency>
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-mapper-asl</artifactId>
        <version>1.9.12</version>
    </dependency>
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-core-asl</artifactId>
        <version>1.9.12</version>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.8.1</version>
        </plugin>
        <plugin>
            <groupId>org.apache.felix</groupId>
            <artifactId>maven-bundle-plugin</artifactId>
            <extensions>true</extensions>
            <version>2.4.0</version>
            <configuration>
                <instructions>
                    <Export-Package></Export-Package>
                </instructions>
            </configuration>
        </plugin>
    </plugins>
</build>

/resources/META-INF/spring下的application.xml是

 <beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:jaxrs="http://cxf.apache.org/jaxrs"
   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    http://cxf.apache.org/jaxrs http://cxf.apache.org/schemas/jaxrs.xsd">

<jaxrs:server id="restService" address="http://localhost:9000/lastmile">
    <jaxrs:serviceBeans>
        <ref bean="lastMileService" />
    </jaxrs:serviceBeans>
    <jaxrs:providers>
        <ref bean="jacksonJsonProvider" />
    </jaxrs:providers>
</jaxrs:server>
<bean id="lastMileService" class="com.fuse.test.RestService" />
<bean id="jacksonJsonProvider" class="org.codehaus.jackson.jaxrs.JacksonJsonProvider" />

当我在 Fuse 上安装捆绑包时，出现以下错误

**Error executing command: Error starting bundles:
         Unable to start bundle 315: Unresolved constraint in bundle org.fuse.test.fuse-hw [315]: 
     Unable to resolve 315.0: missing requirement [315.0] osgi.wiring.package; (& 
     (osgi.wiring.package=org.codehaus.jackson.jaxrs)(version>=1.9.0)(!(version>=2.0.0)))**

请协助解决这个问题。还有 FUSE / Karaf 的任何好的教程/培训视频。网上关于OSGI的资料好像很有限

Answer 1

我明白了，问题是我使用的 jackson 版本与 fuse 6.3 中预建的版本不同。使用以下命令找出您在 fuse karaf env

中安装的库的版本

    JBossFuse:karaf@root> list -l | grep -i "jackson"
    [ 146] [Active     ] [            ] [       ] [   80] 
    mvn:com.fasterxml.jackson.module/jackson-module-jaxb-annotations/2.6.3
    [ 147] [Active     ] [            ] [       ] [   80] 
    mvn:com.fasterxml.jackson.module/jackson-module-paranamer/2.6.3
   [ 148] [Active     ] [            ] [       ] [   80] 
   mvn:com.fasterxml.jackson.module/jackson-module-scala_2.10/2.6.3
   [ 300] [Active     ] [            ] [       ] [   50] mvn:org.apache.camel/camel- 
  jackson/2.17.0.redhat-630187
   [ 313] [Active     ] [            ] [       ] [   50] 
  mvn:com.fasterxml.jackson.dataformat/jackson-dataformat-xml/2.6.3
 [ 314] [Active     ] [            ] [       ] [   50] mvn:org.apache.camel/camel- 
 jacksonxml/2.17.0.redhat-630187

所以我应该使用的版本是 2.6.3，或者更好的选择是使用

         <dependency>
            <groupId>org.jboss.fuse.bom</groupId>
            <artifactId>jboss-fuse-parent</artifactId>
            <version>6.3.0.redhat-187</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>

并且无需指定 jar 的版本。

还有一个与安装任何不属于 fuse bundle 的 jar 有关的问题，请使用以下命令

 JBossFuse:karaf@root> install -s wrap:file:/<abc.jar>

在 Jboss Fuse 6.3 上实现 REST OSGI 服务

implementing a REST OSGI service on Jboss Fuse 6.3

apache-karaf

osgi-bundle

jbossfuse