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JavaSpace Component

Available as of Camel 2.1

The javaspace: component is a transport for working with any JavaSpace compliant implementation , and this component has been tested with both the Blitz implementation and the GigaSpace implementation .
This component can be used for sending and receiving any object inheriting from the Jini net.jini.core.entry.Entry class, it's . It is also possible to pass an id (Spring Bean) the bean ID of a template that can be used for reading/taking the entries from the space.
This component can be also used for sending/receiving any serializable object acting as a sort of generic transport. The JavaSpace component contains a special optimization for dealing with the BeanExchange. It can be used , then, for invoking remotely to invoke a POJO remotely, using a JavaSpace as a transport a JavaSpace.
This latter feature can be used for an easy provide a simple implementation of the master/worker pattern, where a POJO provides the business logic for the worker.
Look at the test cases for examples of various use cases for seeing the various usage option for this component.this component.

Maven users will need to add the following dependency to their pom.xml for this component:

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-javaspace</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>

URI format

javaspace:jini://host[?options]

You can append query options to the URI in the following format, ?option=value&option=value&...

Options

Examples

Sending and Receiving Entries

//Sending sending route
from("direct:input")
    .to("javaspace:jini://localhost?spaceName=mySpace");

//Receiving receiving Route
from("javaspace:jini://localhost?spaceName=mySpace&templateId=template&verb=take&concurrentConsumers=1")
    .to("mock:foo");

In this case the payload can be any object inheriting that inherits from the Jini Entry type.

Sending and receiving serializable objects

Using the preceding routes as above , it 's is also possible to send and receive any serializable object. The camel JavaSpace component detects that the payload is not a Jini Entry and then it automatically wraps the payload into with a Camel Jini Entry. In this way, a JavaSpace can be used as a generic transport mechanism.

Using JavaSpace as a remote invocation transport

The camel-javaspace JavaSpace component has been tailored to work in combination with the camel-Camel bean component. It 's possible, then, is therefore possible to call a remote POJO using JavaSpace as a the transport:

// client side
from("direct:input")
    .to("javaspace:jini://localhost?spaceName=mySpace"); 

//Client server side

from("javaspace:jini://localhost?concurrentConsumers=10&spaceName=mySpace")
    .to("pojomock:pojofoo"); //Server side

In the code there are two test cases showing how to use the a POJO for realizing to realize the master/worker pattern. The idea is to use the POJO for providing to provide the business logic and relying rely on camel Camel for sending/receiving requests/replies with the proper correlation.

Options

Using camel-javaspace

To use this module you need to use the FUSE Mediation Router distribution. Or you could just add the following to your pom.xml, substituting the version number for the latest & greatest release.

<dependency>
  <groupId>org.apache.camel</groupId>
  <artifactId>camel-parent</artifactId>
  <version>1.4.0.0-fuse</version>
</dependency>

And ensure you are pointing at the maven repo

   <repository>
     <id>open.iona.m2</id>
     <name>IONA Open Source Community Release Repository</name>
     <url>http://repo.open.iona.com/maven2</url>
     <snapshots>
       <enabled>false</enabled>
     </snapshots>
     <releases>
       <enabled>true</enabled>
     </releases>
   </repository>

Building From Source

The source for camel-javaspace is available here: https://projects.open.iona.com/projects/svn/iona/camel/trunk/components/camel-javaspace/^{Image Removed}

You'll need to register with http://open.iona.com^{Image Removed} to be able to access subversion.

The full FUSE distro is here: https://projects.open.iona.com/projects/svn/iona/camel/trunk/^{Image Removed}