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Chamin
Chamin

Reputation: 145

Using a Class mediator with WSO2 ESB

I'm trying to use a class mediator with the WSO2 ESB.

Following is my mediator class.

package samples.mediators;

import org.apache.synapse.MessageContext;
import org.apache.synapse.mediators.AbstractMediator;

public class SiriBankMediator extends AbstractMediator {
    @Override
    public boolean mediate(MessageContext messageContext) {
        System.out.println("Hurraaaayyyy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        return false; 
    }
}

As suggested by Writing a WSO2 ESB Mediator, I tried the "Easier Way", created a jar with synapse-core_2.1.0.wso2v8.jar included in class path.

MANIFEST.MF is as follows

Manifest-Version: 1.0
Class-Path: synapse-core_2.1.0.wso2v8.jar
Created-By: 1.7.0_07 (Oracle Corporation)

And then as article suggested, dropped the jar to repository/components/lib in the ESB.

But after ESB restart when I try to load class it gives the error Class not found in the path Class not found in the path

Jar file used is shared at siri.jar

Wonder what is missing in the steps I followed.

Thank you in advance.

Note: I used WSO2 Enterprise Service Bus 4.5.1

Upvotes: 2

Views: 3496

Answers (4)

Sudheera
Sudheera

Reputation: 1947

This answer might not useful for you because this was asked like 2 years ago but anyone else came across this issue will be find my answer useful.

Just use package name other than samples.mediators that'll solve this issue. cheers..!

Upvotes: 0

Gayan
Gayan

Reputation: 1

try with your mediator class package name with at least three letters ,

example : package samples.mediators;

instead of that package name , try, package samples.mediators.anything;

Upvotes: 0

RaviU
RaviU

Reputation: 1213

I've successfully deployed your custom mediator using the maven approach. Here's what I've done.

I created the following directory structure and placed your SiriBankMediator.java in src/main/java:

.
├── pom.xml
├── src
│   └── main
│       └── java
│           └── SiriBankMediator.java

The pom.xml file is as follows:

<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/maven-v4_0_0.xsd">

    <modelVersion>4.0.0</modelVersion>
    <groupId>org.samples.mediator</groupId>
    <artifactId>siribankmediator</artifactId>
    <version>1.0</version>

    <repositories>
        <repository>
            <id>wso2-maven2-repository</id>
            <url>http://dist.wso2.org/maven2</url>
        </repository>
        <repository>
            <id>apache-Incubating-repo</id>
            <name>Maven Incubating Repository</name>
            <url>http://people.apache.org/repo/m2-incubating-repository</url>
        </repository>
        <repository>
            <id>apache-maven2-repo</id>
            <name>Apache Maven2 Repository</name>
            <url>http://repo1.maven.org/maven2/</url>
        </repository>
    </repositories>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.0</version>
                <configuration>
                    <source>1.5</source>
                    <target>1.5</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.felix</groupId>
                <artifactId>maven-bundle-plugin</artifactId>
                <version>1.4.0</version>
                <extensions>true</extensions>
                <configuration>
                    <instructions>
                        <Bundle-SymbolicName>org.test</Bundle-SymbolicName>
                        <Bundle-Name>org.test</Bundle-Name>
                        <Export-Package>
                            org.test.mediator.*,
                        </Export-Package>
                        <Import-Package>
                            *; resolution:=optional
                        </Import-Package>
                        <Fragment-Host>synapse-core</Fragment-Host>
                    </instructions>
                </configuration>
            </plugin>
            <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <configuration>
        <archive>
            <manifest>
            <mainClass>fully.qualified.MainClass</mainClass>
            </manifest>
        </archive>
        <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
        </descriptorRefs>
        </configuration>
            </plugin>
        </plugins>
    </build>

    <dependencies>
        <dependency>
            <groupId>org.apache.synapse</groupId>
            <artifactId>synapse-core</artifactId>
            <version>1.3.0.wso2v1</version>
        </dependency>
    </dependencies>
</project>

Then inside the directory containing the POM file, we do mvn compile package. This should build the jar file you need to put inside of $ESB_HOME/repository/components/lib in the folder called target.

Finally you can load the class as org.samples.mediator.SiriBankMediator through the carbon management frontend. Don't forget to restart your ESB. Hope that helps. :)

Upvotes: 6

Philipp
Philipp

Reputation: 4729

My Manifest of my Custom Mediator jars look like this:

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.3
Created-By: 1.6.0_27-b07 (Sun Microsystems Inc.)

So maybe do not add that classpath and if this does not work, try to build with a Java 1.6 version. Then it should all be fine.

Remember add your jar in "components/lib". Check the "components/dropins" folder after startup if WSO2 ESB has created a OSGi bundle of your jar. Then the class should be available.

Upvotes: 1

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