The cometd: component is a transport for working with the jetty implementation of the cometd/bayeux protocol.
Using this component in combination with the dojo toolkit library it's possible to push Camel messages directly into the browser using an AJAX based mechanism.
Maven users will need to add the following dependency to their pom.xml
for this component:
<dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-cometd</artifactId> <version>x.x.x</version> <!-- use the same version as your Camel core version --> </dependency> |
cometd://host:port/channelName[?options] |
The channelName represents a topic that can be subscribed to by the Camel endpoints.
cometd://localhost:8080/service/mychannel cometds://localhost:8443/service/mychannel |
where cometds:
represents an SSL configured endpoint.
|
You can append query options to the URI in the following format, ?option=value&option=value&...
Here is some examples on How to pass the parameters
For file (for webapp resources located in the Web Application directory --> cometd://localhost:8080?resourceBase=file./webapp
For classpath (when by example the web resources are packaged inside the webapp folder --> cometd://localhost:8080?resourceBase=classpath:webapp
Available as of Camel 2.8
You can configure custom SecurityPolicy
and Extension
's to the CometdComponent
which allows you to use authentication as documented here
As of Camel 2.9, the Cometd component supports SSL/TLS configuration through the Camel JSSE Configuration Utility. This utility greatly decreases the amount of component specific code you need to write and is configurable at the endpoint and component levels. The following examples demonstrate how to use the utility with the Cometd component. You need to configure SSL on the CometdComponent.
KeyStoreParameters ksp = new KeyStoreParameters(); ksp.setResource("/users/home/server/keystore.jks"); ksp.setPassword("keystorePassword"); KeyManagersParameters kmp = new KeyManagersParameters(); kmp.setKeyStore(ksp); kmp.setKeyPassword("keyPassword"); TrustManagersParameters tmp = new TrustManagersParameters(); tmp.setKeyStore(ksp); SSLContextParameters scp = new SSLContextParameters(); scp.setKeyManagers(kmp); scp.setTrustManagers(tmp); CometdComponent commetdComponent = getContext().getComponent("cometds", CometdComponent.class); commetdComponent.setSslContextParameters(scp); |
... <camel:sslContextParameters id="sslContextParameters"> <camel:keyManagers keyPassword="keyPassword"> <camel:keyStore resource="/users/home/server/keystore.jks" password="keystorePassword"/> </camel:keyManagers> <camel:trustManagers> <camel:keyStore resource="/users/home/server/keystore.jks" password="keystorePassword"/> </camel:keyManagers> </camel:sslContextParameters>... <bean id="cometd" class="org.apache.camel.component.cometd.CometdComponent"> <property name="sslContextParameters" ref="sslContextParameters"/> </bean> ... <to uri="cometds://127.0.0.1:443/service/test?baseResource=file:./target/test-classes/webapp&timeout=240000&interval=0&maxInterval=30000&multiFrameInterval=1500&jsonCommented=true&logLevel=2"/>... |