扩展 org.eclipse.equinox.http.registry.servlets 不起作用

Question

Im trying to make an servlet extension to org.eclipse.equinox.http.registry.servlets extension point, but cant get it working. Ill try to write down my proccess so maybe someone can tell me what im doing wrong or what i didnt do :)

So, first i made just a jetty server with a default servlet.

Here was my initial 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>com.example</groupId>
    <artifactId>myserver</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>myserver</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <bundle.symbolicName>myserver</bundle.symbolicName>
        <bundle.namespace>com.example</bundle.namespace>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.core</artifactId>
            <version>4.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-servlet</artifactId>
            <version>8.1.10.v20130312</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.felix</groupId>
                <artifactId>maven-bundle-plugin</artifactId>
                <extensions>true</extensions>
                <executions>
                    <execution>
                        <id>bundle-manifest</id>
                        <phase>process-classes</phase>
                        <goals>
                            <goal>manifest</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <manifestLocation>META-INF</manifestLocation>
                    <instructions>
                        <Bundle-SymbolicName>${bundle.symbolicName}</Bundle-SymbolicName>
                        <Bundle-Version>${pom.version}</Bundle-Version>
                        <Bundle-Activator>${bundle.namespace}.myserver.App</Bundle-Activator>
                        <Import-Package>
                            org.osgi.framework,
                            javax.servlet,
                            javax.servlet.http,
                            org.eclipse.jetty.server,
                            org.eclipse.jetty.servlet
                        </Import-Package>
                        <Require-Bundle>
                        </Require-Bundle>
                    </instructions>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

Here is my App thats a bundle activator:

package com.example.myserver;

import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;

public class App implements BundleActivator {

    public void start(BundleContext context) throws Exception {
        Server server = new Server(8080);

        ServletContextHandler c = new ServletContextHandler(server, "/");
        c.addServlet(new ServletHolder(new HelloWorldServlet()),"/test");

        server.start();
        server.join();
    }

    public void stop(BundleContext context) throws Exception {
        // TODO Auto-generated method stub
    }   
}

And here is my servlet:

package com.example.myserver;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class HelloWorldServlet extends HttpServlet {

    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().println("Hello from HelloWorldServlet");
    }
}

Then i launch my configuration with following bundles:

javax.servlet,
org.apache.felix.gogo.command,
org.apache.felix.gogo.runtime,
org.apache.felix.gogo.shell,
org.eclipse.equinox.console,
org.eclipse.jetty.continuation,
org.eclipse.jetty.http,
org.eclipse.jetty.io,
org.eclipse.jetty.security,
org.eclipse.jetty.server,
org.eclipse.jetty.servlet,
org.eclipse.jetty.util,
org.eclipse.osgi

Now when i type in url http://localhost:8080/test then everything works fine and my hello text appears.

Now i try to do the same thing with an extension of org.eclipse.equinox.http.registry.servlets.

Here is what i do:

1) Add org.eclipse.equinox.http.registry to Require-Bundle under pom.xml

2) open manifest, select extensions tab, click add, select org.eclipse.equinox.http.registry.servlets extension point, add, under extension details put class com.example.myserver.HelloWorldServlet and /test2 as alias.

Following plugin.xml is generated:

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
   <extension
         point="org.eclipse.equinox.http.registry.servlets">
      <servlet
            alias="/test2"
            class="com.example.myserver.HelloWorldServlet">
      </servlet>
   </extension>

</plugin>

Under launch configuration I needed to add these bundles:

org.eclipse.equinox.http.registry
org.eclipse.osgi.service,
org.eclipse.osgi.services,
org.eclipse.equinox.common,
org.eclipse.equinox.registry,
javax.xml

Then when i run my configuration i get a warning: !MESSAGE The extensions and extension-points from the bundle "myserver" are ignored. The bundle is not marked as singleton. !MESSAGE The extensions and extension-points from the bundle "myserver" are ignored. The bundle is not marked as singleton.

... so in pom.xml i change to this:

<Bundle-SymbolicName>${bundle.symbolicName};singleton:=true</Bundle-SymbolicName>

... run again, no errors, everything seems nice.

If i run http://localhost:8080/test everything works. If i run http://localhost:8080/test1 i get an not found error.

Maybe i left something undone? I hope i didnt go into too much detail, but i really hope someone can help me figure this out. Thanks! :)

Answer 1

You misplaced, because described alias="/test2", and try with http://localhost:8080/test1

You should use http://localhost:8080/test2