我是Apache camel的新手并且刚刚尝试使用RouteBuilder构建一个Route但是当我有一个扩展RouterBuilder的类时，当我尝试在Apache karaf中安装该bundle时出现此错误：
2015-09-08 14:54:49,227 | WARN | raf-3.0.4/deploy | fileinstall
| 7 - org.apache.felix.fileinstall - 3.5.0 | Error while starting bundle:
file:/C:/apache-karaf-3.0.4/deploy/osgi-1.0-SNAPSHOT.jar
org.osgi.framework.BundleException: Unresolved constraint in bundle osgi [91]: U
nable to resolve 91.0: missing requirement [91.0] osgi.wiring.package; (&(osgi.w
iring.package=org.apache.camel.builder)(version>=2.14.0)(!(version>=3.0.0)))
at org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:397
4)[org.apache.felix.framework-4.2.1.jar:]
at org.apache.felix.framework.Felix.startBundle(Felix.java:2037)[org.apa
che.felix.framework-4.2.1.jar:]
at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:955)[org.
apache.felix.framework-4.2.1.jar:]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundle(Di
rectoryWatcher.java:1245)[7:org.apache.felix.fileinstall:3.5.0]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundles(D
irectoryWatcher.java:1217)[7:org.apache.felix.fileinstall:3.5.0]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.doProcess(Dire
ctoryWatcher.java:509)[7:org.apache.felix.fileinstall:3.5.0]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.process(Direct
oryWatcher.java:358)[7:org.apache.felix.fileinstall:3.5.0]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryW
atcher.java:310)[7:org.apache.felix.fileinstall:3.5.0]
现在我只得到那两个类
package osgi;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
public class Activator implements BundleActivator {
public void start(BundleContext context) {
System.out.println("Starting the bundle");
}
public void stop(BundleContext context) {
System.out.println("Stopping the bundle");
}
}
package osgi;
import org.apache.camel.builder.RouteBuilder;
public class TimerRouteBuilder extends RouteBuilder {
@Override
public void configure() throws Exception {
// TODO Auto-generated method stub
}
}
这是我的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">
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<modelVersion>4.0.0</modelVersion>
<groupId>osgi</groupId>
<artifactId>osgi</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>bundle</packaging>
<name>osgi Bundle</name>
<description>osgi OSGi bundle project.</description>
<dependencies>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.core</artifactId>
<version>4.2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-core</artifactId>
<version>2.14.3</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<version>2.3.7</version>
<extensions>true</extensions>
<configuration>
<instructions>
<Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>
<Bundle-Version>${project.version}</Bundle-Version>
<Bundle-Activator>osgi.Activator</Bundle-Activator>
<Export-Package>
osgi*;version=${project.version}
</Export-Package>
<Import-Package>
*
</Import-Package>
</instructions>
</configuration>
</plugin>
</plugins>
</build>
</project>
答案 0 :(得分：4)
您在Karaf安装中缺少 camel-core 依赖项。如果检查osgi-1.0-SNAPSHOT.jar包中的META-INF / MANIFEST.MF文件，您可以看到Import-Packages部分中有一行显示 org.apache.camel.builder 使用捆绑包运行所需的所有其他包。
现在，当您部署捆绑包时，必须满足清单文件中的所有导入，否则您将获得这些捆绑包接线异常。由于你的pom.xml中有camel-core（更确切地说，因为你的Java代码中有导入到camel-core类），所以你必须在Karaf中提供这些类。自定义以来，您自己的类将位于该bundle jar中：
<Export-Package>
osgi*;version=${project.version}
</Export-Package>
Karaf将提供org.osgi.core，您无需自行安装。
解决方案1 ：您可以通过在Karaf控制台中插入以下内容手动安装 camel-core ：
feature:repo-add mvn:org.apache.camel.karaf/apache-camel/2.14.3/xml/features
feature:install camel-core
在此之后，您的捆绑包安装将成功。
解决方案2 ：您可以创建Karaf存档（.kar），将所有必需的依赖项分组到一个可以部署的文件中。使用如下结构创建新的Maven项目：
.
├── pom.xml
└── src
└── main
└── feature
└── feature.xml
pom.xml在哪里
<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.example</groupId>
<artifactId>osgi-example-kar</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>kar</packaging>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.karaf.tooling</groupId>
<artifactId>karaf-maven-plugin</artifactId>
<version>3.0.2</version>
<extensions>true</extensions>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.karaf.tooling</groupId>
<artifactId>karaf-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
和feature.xml是
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<features xmlns="http://karaf.apache.org/xmlns/features/v1.2.1" name="osgi-example-features">
<repository>mvn:org.apache.camel.karaf/apache-camel/2.14.3/xml/features</repository>
<feature name="osgi-example-features" version="1.0-SNAPSHOT"
description="Features for running simple OSGi example.">
<feature version="2.14.3">camel-core</feature>
</feature>
</features>
当您运行 mvn install 并将目标/ * .kar文件复制到Karaf部署文件夹时，Karaf将为您安装camel-core。在此之后，您的软件包安装将成功。
请注意，当您登录到System.out时，它不会出现在Karaf控制台日志中，因此不要期望在那里看到这些消息。你可以用例如Log4j Logger那里。