Apache Camel: JBI

JBI Component

The jbi component is implemented by the ServiceMix Camel module and provides integration with a JBI Normalized Message Router, such as the one provided by Apache ServiceMix.

See below for information about how to use StreamSource types from ServiceMix in Camel.

The following code:

from("jbi:endpoint:http://foo.bar.org/MyService/MyEndpoint")

Automatically exposes a new endpoint to the bus, where the service QName is {http://foo.bar.org}MyService and the endpoint name is MyEndpoint (see #URI-format).

When a JBI endpoint appears at the end of a route, for example:

to("jbi:endpoint:http://foo.bar.org/MyService/MyEndpoint")

The messages sent by this producer endpoint are sent to the already deployed JBI endpoint.

URI format

jbi:service:serviceNamespace[sep]serviceName[?options]
jbi:endpoint:serviceNamespace[sep]serviceName[sep]endpointName[?options]
jbi:name:endpointName[?options]

The separator that should be used in the endpoint URL is:

/ (forward slash), if serviceNamespace starts with http://, or
: (colon), if serviceNamespace starts with urn:foo:bar.

For more details of valid JBI URIs see the ServiceMix URI Guide.

Using the jbi:service: or jbi:endpoint: URI formats sets the service QName on the JBI endpoint to the one specified. Otherwise, the default Camel JBI Service QName is used, which is:

{http://activemq.apache.org/camel/schema/jbi}endpoint

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

Examples

jbi:service:http://foo.bar.org/MyService
jbi:endpoint:urn:foo:bar:MyService:MyEndpoint
jbi:endpoint:http://foo.bar.org/MyService/MyEndpoint
jbi:name:cheese

URI options

Name	Default value	Description
`mep`	MEP of the Camel Exchange	Allows users to override the MEP set on the Exchange object. Valid values for this option are `in-only`, `in-out`, `robust-in-out` and `in-optional-out`.
`operation`	Value of the `jbi.operation` header property	Specifies the JBI operation for the `MessageExchange`. If no value is supplied, the JBI binding will use the value of the `jbi.operation` header property.
`serialization`	`basic`	Default value (`basic`) will check if headers are serializable by looking at the type, setting this option to `strict` will detect objects that can not be serialized although they implement the `Serializable` interface. Set to `nocheck` to disable this check altogether, note that this should only be used for in-memory transports like SEDAFlow, otherwise you can expect to get `NotSerializableException` thrown at runtime.
`convertException`	`false`	`false`: send any exceptions thrown from the Camel route back unmodified `true`: convert all exceptions to a JBI FaultException (can be used to avoid non-serializable exceptions or to implement generic error handling

Examples

jbi:service:http://foo.bar.org/MyService?mep=in-out       (override the MEP, use InOut JBI MessageExchanges)
jbi:endpoint:urn:foo:bar:MyService:MyEndpoint?mep=in      (override the MEP, use InOnly JBI MessageExchanges)  
jbi:endpoint:urn:foo:bar:MyService:MyEndpoint?operation={http://www.mycompany.org}AddNumbers 
 (overide the operation for the JBI Exchange to {http://www.mycompany.org}AddNumbers)

Using Stream bodies

If you are using a stream type as the message body, you should be aware that a stream is only capable of being read once. So if you enable DEBUG logging, the body is usually logged and thus read. To deal with this, Camel has a streamCaching option that can cache the stream, enabling you to read it multiple times.

from("jbi:endpoint:http://foo.bar.org/MyService/MyEndpoint").streamCaching().to("xslt:transform.xsl", "bean:doSomething");

The stream caching is default enabled, so it is not necessary to set the streamCaching() option.
We store big input streams (by default, over 64K) in a temp file using CachedOutputStream. When you close the input stream, the temp file will be deleted.

Creating a JBI Service Unit

If you have some Camel routes that you want to deploy inside JBI as a Service Unit, you can use the JBI Service Unit Archetype to create a new Maven project for the Service Unit.

If you have an existing Maven project that you need to convert into a JBI Service Unit, you may want to consult ServiceMix Maven JBI Plugins for further help. The key steps are as follows:

Create a Spring XML file at src/main/resources/camel-context.xml to bootstrap your routes inside the JBI Service Unit.
Change the POM file's packaging to jbi-service-unit.

Your pom.xml should look something like this to enable the jbi-service-unit packaging:

<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>myGroupId</groupId>
  <artifactId>myArtifactId</artifactId>
  <packaging>jbi-service-unit</packaging>
  <version>1.0-SNAPSHOT</version>

  <name>A Camel based JBI Service Unit</name>

  <url>http://www.myorganization.org</url>

  <properties>
    <camel-version>x.x.x</camel-version>
    <servicemix-version>3.3</servicemix-version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.apache.servicemix</groupId>
      <artifactId>servicemix-camel</artifactId>
      <version>${servicemix-version}</version>
    </dependency>

    <dependency>
      <groupId>org.apache.servicemix</groupId>
      <artifactId>servicemix-core</artifactId>
      <version>${servicemix-version}</version>
      <scope>provided</scope>
    </dependency>
  </dependencies>

  <build>
    <defaultGoal>install</defaultGoal>

    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.5</source>
          <target>1.5</target>
        </configuration>
      </plugin>

      <!-- creates the JBI deployment unit -->
      <plugin>
        <groupId>org.apache.servicemix.tooling</groupId>
        <artifactId>jbi-maven-plugin</artifactId>
        <version>${servicemix-version}</version>
        <extensions>true</extensions>
      </plugin>
    </plugins>
  </build>
</project>

JBI Component

URI format

Examples

URI options

Examples

Using Stream bodies

Creating a JBI Service Unit

See Also

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