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So now, it is time to create the interface that we will use in this project. Open Eclipse environment if not already done and create a new folder "service" in src/main/java/demo tree. Add the interface TransformService.java and copy paste the code below:

Code Block

	java
	java
title	TransformService.javajava

package demo.service;

public interface TransformService {

    public Object transform(Object obj);

}

...

Next, we will create the class TransformServiceImpl implementing the interface TransformService in the folder "impl" in src/main/java/demo/service/impl.

Code Block

	java
	java
title	TransformServiceImpl.javajava

package demo.service.impl;

import java.util.Date;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class TransformServiceImpl implements TransformService {
    private static final transient Log LOG = LogFactory.getLog(TransformServiceImpl.class);
    private boolean verbose = true;
    private String prefix = "MyTransform";

    public Object transform(Object body) {
        String answer = prefix + " set body:  " + new Date();
        if (verbose) {
            System.out.println(">> call >> " + answer);
        }
        LOG.info(">> call >>" + answer);
        return answer;
    }

    public boolean isVerbose() {
        return verbose;
    }

    public void setVerbose(boolean verbose) {
        this.verbose = verbose;
    }

    public String getPrefix() {
        return prefix;
    }

    public void setPrefix(String prefix) {
        this.prefix = prefix;
    }
}

...

Create the file demo-service-bundle-contxt.xml in the folder src/main/resources/META-INF/spring

Code Block

	xml
	xml
title	demo-service-bundle-contxt.xml	xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

  <!-- regular spring configuration file defining the beans for this
       bundle. The configuration of OSGi definitions is kept in a separate
       configuration file so that this file can easily be used
       for integration testing outside of an OSGi environment -->
    <bean id="transformService" class="demo.service.impl.TransformServiceImpl">
    </bean>
</beans>

...

Create the file demo-service-bundle-contxt-osgi.xml in the folder src/main/resources/META-INF/spring

Code Block

	xml
	xml
title	demo-service-bundle-contxt-osgi.xmlxml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:osgi="http://www.springframework.org/schema/osgi"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/osgi
    http://www.springframework.org/schema/osgi/spring-osgi.xsd">

	<osgi:service ref="transformService">
		<osgi:interfaces>
			<value>demo.service.TransformService</value>
		</osgi:interfaces>
	</osgi:service>

</beans>

...

For the routing, create the following file in the folder src/main/resources/META-INF/spring of the project demo.camel-bundle:

Code Block

	xml
	xml
title	CamelContext.xml	xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
       http://camel.apache.org/schema/spring
       http://camel.apache.org/schema/spring/camel-spring-2.0.0.xsd">

  <camelContext xmlns="http://camel.apache.org/schema/spring">
    <route>
      <from uri="timer://myTimer?fixedRate=true&amp;period=10000"/>
      <bean ref="myTransform" method="transform"/>
      <to uri="log:ExampleRouter"/>
    </route>
  </camelContext>
</beans>

...

To inject the dependency, we will create a second file named bundle-context-osgi.xml in the same folder:

Code Block

	xml
	xml
title	bundle-context-osgi.xmlxml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:osgi="http://www.springframework.org/schema/osgi"
  xsi:schemaLocation="
  http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans.xsd
  http://www.springframework.org/schema/osgi
  http://www.springframework.org/schema/osgi/spring-osgi.xsd">

      <osgi:reference id="myTransform" interface="demo.service.TransformService"/>

</beans>

...

Prior to run/launch the command generating the MANIFEST file, you must modify the pom.xml file in order to allow the OSGI bundle to import/use the services classes : demo.service

Code Block

	xml
	xml
title	pom demo.camel-bundlexml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns="http://maven.apache.org/POM/4.0.0"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

  <properties>
    <bundle.symbolicName>demo.camel-bundle</bundle.symbolicName>
    <bundle.namespace>demo.camel</bundle.namespace>
  </properties>

  <modelVersion>4.0.0</modelVersion>
  <groupId>demo.camel</groupId>
  <artifactId>demo.camel-bundle</artifactId>
  <version>0.1</version>

  <name>${bundle.symbolicName} [${bundle.namespace}]</name>

  <packaging>bundle</packaging>

  <build>
    <resources>
      <resource>
        <directory>src/main/resources</directory>
      </resource>
      <!--
       | example additional resource entries, useful when building Eclipse RCP applications
      -->
      <resource>
        <directory>.</directory>
        <includes>
          <include>plugin.xml</include>
          <include>plugin.properties</include>
          <include>icons/**</include>
          <include>META-INF/*</include>
        </includes>
      </resource>
    </resources>
    <plugins>
      <plugin>
        <groupId>org.ops4j</groupId>
        <artifactId>maven-pax-plugin</artifactId>
        <version>1.4</version>
        <!--
           | enable improved OSGi compilation support for the bundle life-cycle.
           | to switch back to the standard bundle life-cycle, move this setting
           | down to the maven-bundle-plugin section
          -->
        <extensions>true</extensions>
      </plugin>
      <plugin>
        <groupId>org.apache.felix</groupId>
        <artifactId>maven-bundle-plugin</artifactId>
        <version>1.4.3</version>
        <!--
         | the following instructions build a simple set of public/private classes into an OSGi bundle
        -->
        <configuration>
          <instructions>
            <Bundle-SymbolicName>${bundle.symbolicName}</Bundle-SymbolicName>
            <Bundle-Version>${pom.version}</Bundle-Version>
            <Import-Package>demo.service;version="${pom.version}"</Import-Package>
            <Include-Resource>src/main/resources</Include-Resource>
          </instructions>
        </configuration>
      </plugin>
    </plugins>
  </build>

  <dependencies>
    <dependency>
      <groupId>org.osgi</groupId>
      <artifactId>osgi_R4_core</artifactId>
      <version>1.0</version>
      <scope>provided</scope>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>org.osgi</groupId>
      <artifactId>osgi_R4_compendium</artifactId>
      <version>1.0</version>
      <scope>provided</scope>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>demo.service</groupId>
      <artifactId>demo.service-bundle</artifactId>
      <version>${pom.version}</version>
    </dependency>
  </dependencies>

</project>

...

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