Karaf Support
Apache Camel is designed to work nicely into inside Apache Karaf OSGi container.
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- Camel features descriptor allowing to easily and quickly install Camel in Karaf.
- Karaf commands allowing you to view, start, stop, get info, about the Camel contexts and routes running in the Karaf instance. NB: Karaf commands are available starting with Camel 2.8.0.
It is recommended to use at least Apache Karaf 4.x with current Camel versions.
Install Camel in Karaf
Assuming that you have a running Karaf instance, you can register the Camel features descriptor:
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karaf@root> featuresfeature:addurl mvn:org.apache.camel.karaf/apache-camel/2.8.0/xml/featuresrepo-add camel 2.18.4 |
Now, we have all Camel features available:
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karaf@root> features:list|grep -i camel [uninstalled] [2.8.0 ] camel repo-0 [uninstalled] [2.8.0 ] camel-core repo-0 [uninstalled] [2.8.0 ] camel-spring repo-0 [uninstalled] [2.8.0 ] camel-blueprint repo-0 [uninstalled] [2.8.0 ] camel-test repo-0 [uninstalled] [2.8.0 ] camel-cxf repo-0 ... |
It is a good start to at least install camel-blueprint
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karaf@root> features:install camel-blueprint |
You might need other features depending on what components you use in your routes. So for example if you use stream:out then you need the camel-stream feature.
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karaf@root> [uninstalled] [2features:install camel-stream |
Karaf commands
The camel commands below help managing your integrations. In many cases the commands support tab completion for context and route names.
Command | Description |
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camel:context-list | Lists the camel contexts available in the current Karaf instance |
camel:context-info | Displays detail information about a given Camel context |
camel:context-start | Starts the given Camel context |
camel:context-stop | Stops the given Camel context (it becomes unavailable and it can't be started afterwards) |
camel:route-list | Displays the list of Camel routes available in the current Karaf instance |
camel:route-info | Provides detail information about a Camel route |
camel:route-show | Renders the route in XML |
camel:route-start | Starts the given route. From Camel 2.10 onwards you can use * as wildcard to match multiple routes. |
camel:route-stop | Stops the given route. From Camel 2.10 onwards you can use * as wildcard to match multiple routes. |
camel:route-suspend | Suspends the given route. From Camel 2.10 onwards you can use * as wildcard to match multiple routes. |
camel:route-resume | Resumes the given route. From Camel 2.10 onwards you can use * as wildcard to match multiple routes. |
camel:endpoint-list | Lists endpoints fromm all camel contexts available in the current Karaf instance |
camel:route-profile | To profile route(s) |
camel:route-reset-stats | To reset performance stats on the given route(s) |
camel:context-suspend | Suspends the given Camel context |
camel:context-resume | Resumes the given Camel context |
camel:route-list
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karaf@root> camel:route-list [route1.8.0 ] camel-cache ] |
You can also filter the routes by CamelContext:
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karaf@root> repo-0camel:route-list 66-camel-3 [route1 ] |
Tip: use the TAB key to completion on the CamelContext ID.
camel:context-info
Displays detailed information about a given CamelContext:
add the *--verbose* option (following the context name) to also list the endpoints
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karaf@root> camel:context-info 66-camel-3 Camel Context 66-camel-3 [uninstalled] [2.8.0 ] camel-castor repo-0Name: 66-camel-3 [uninstalled] [Version: 2.8.0 Status: Started ] camel-crypto Uptime: 1 minute Advanced Auto Startup: true repo-0 Starting Routes: false Suspended: false [uninstalled] [2.8.0 Tracing: false Properties Components ] camel-http timer properties repo-0 log Endpoints timer://test [uninstalled] [2.8.0log://test Routes ] camel-http4 route1 Used Languages |
You can see the current Camel version used by the CamelContext, some context attributes, the components involved in the context, and the endpoints defined.
Tip: use TAB key for completion on the CamelContext name.
camel:route-info
The *camel:route-info* command provides detail information about a Camel route:
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karaf@root> camel:route-info route1 Camel Route route1 Camel Context: 66-camel-3 Properties repo-0 id = [uninstalled] [2.8.0route1 ] camel-mina parent = 2e7aacc1 Statistics Exchanges Total: 98 repo-0 Exchanges Completed: 98 Exchanges Failed: 0 [uninstalled] [2.8.0 Min Processing Time: ]1ms camel-jetty Max Processing Time: 2ms Mean repo-0Processing Time: 1ms Total Processing [uninstalled] [2.8.0Time: 134ms Last Processing Time: ]1ms camel-servlet First Exchange repo-0 Date: 2011-06-29 07:21:57 Last Exchange Completed Date: 2011-06-29 07:23:34 Definition <?xml version="1.0" encoding="UTF-8" [uninstalled] [2.8.0standalone="yes"?> <route id="route1" xmlns="http://camel.apache.org/schema/spring"> <from uri="timer:test"/> ] camel-jms repo-0 ... |
To install Camel, just install the camel feature:
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karaf@root> features:install camel
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You have to install the Camel features depending of your requirements.
For instance, if you want to use blueprint as Camel DSL, you have to install the camel-blueprint feature:
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karaf@root> features:install camel-blueprint
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If, if your route, you use an endpoint like "stream:out", you have to install the camel-stream feature:
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karaf@root> features:install camel-stream
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Karaf commands
When you install the camel feature, new Karaf commands become available automatically.
camel:list-contexts
<to uri="log:test" id="to1"/>
</route>
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You can see some statistics (the number of processed exchanges, the processing time, etc) and a XML rendering of your route (whatever DSL used to define the route).
Tip: use TAB key for completion on the route name.
camel:route-show
The *camel:route-show* command renders the route in XML. It's independent from the DSL used to define the route:
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karaf@root> camel:route-show route1
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<route id="route1" xmlns="http://camel.apache.org/schema/spring">
<from uri="timer:test"/>
<to uri="log:test" id="to1"/>
</route>
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Tip: use TAB key for completion on the route name.
camel:route-suspend
The *camel:route-suspend* command suspends a Camel route:
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karaf@root> camel:route-suspend route1
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Tip: use TAB key for completion on the route name.
camel:route-resume
The *camel:route-resume* command resume a Camel route:
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karaf@root> camel:route-resume route1
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Tip: use TAB key for completion on the route name.
camel:endpoint-list
The *camel:endpoint-list* command displays the list of the endpoints available in all camel contexts of The *camel:list-contexts* command displays the list of CamelContext available in the current Karaf instance:
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karaf@root> camel:endpoint-list-contexts Namecamel-id uri Status UptimeStatus [66-camel-3test ] [Started ] [timer://test ] [14.559 secondsStarted ] |
It displays the context name/ID (used in others commands), the current status (started/stopped), the uptime (since when the context has been started).
camel:list-routes
The *camel:list-routes* command displays the list of Camel routes available in the current Karaf instance:
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karaf@root> camel:list-routes ] [route1test ] |
You can also filter the routes by CamelContext:
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karaf@root> camel:list-routes 66-camel-3 [route1 [direct://A ] [Started ] |
It displays the context name/ID (used in others commands), the URI of the endpoint and the current status (started/stopped).
Tip: use the TAB key to completion on the CamelContext ID.