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Embedding Karaf in a WebContainer
This demo shows how to package Karaf as a webapplication (war) ready to be deployed in a webcontainer like
Apache Tomcat.
It also shows how to override some configuration files to automatically install a HTTP bridge.
Prerequisites for Running the Example
You must have the following installed on your machine:
- JDK 1.7 or higher
- Maven 3.2.3 or higher
Building and Deploying
You can build and deploy this example in two ways:
- A. Using Jetty: Quick and Easy
This option is useful if you want to see the example up and
running quickly.
- B. Using Your Favorite WebContainer (like Apache Tomcat)
This option is useful if you want to see Karaf running
as a web application inside your favorite web container.
A. Using Jetty: Quick and Easy
To build the example and deploy to Jetty, complete the
following steps:
1. In a command prompt/shell, change to the directory
that contains this README.txt file.
2. Enter the following Maven command:
mvn package jetty:run
This Maven command builds the example web application, starts
Jetty and deploys the web application to Jetty. Once complete,
you should see the following printed to the console:
[INFO] Started Jetty Server
[INFO] Starting scanner at interval of 10 seconds.
Running a Client
To test the example, you can use the Apache Karaf client
to connect to the server and issue a Karaf command. For example,
try executing the "features:list" command as follows:
1. In a command prompt/shell, change to your product
installation directory.
2. Run the following commands:
${KARAF_HOME}/bin/client feature:list
%KARAF_HOME%\bin\client.bat feature:list
Using JDK:
java -jar lib/bin/karaf-client.jar features:list
In this case, you should see output similar to the following:
(abbreviated output below)
State Version Name Repository Description
[uninstalled] [${version} ] wrapper standard-${version} Provide OS integration
[uninstalled] [${version} ] obr standard-${version} Provide OSGi Bundle Repository (OBR) support
[uninstalled] [${version} ] config standard-${version} Provide OSGi ConfigAdmin support
[uninstalled] [${version} ] region standard-${version} Provide Region commands
[uninstalled] [7.5.4.v20111024] jetty standard-${version} Provide Jetty engine support
[uninstalled] [${version} ] http standard-${version} Implementation of the OSGI HTTP Service
[uninstalled] [${version} ] http-whiteboard standard-${version} Provide HTTP Whiteboard pattern support
[uninstalled] [${version} ] war standard-${version} Turn Karaf as a full WebContainer
[uninstalled] [${version} ] deployers standard-${version} Provide Karaf deployer
[uninstalled] [${version} ] kar standard-${version} Provide KAR (KARaf archive) support
[uninstalled] [${version} ] webconsole-base standard-${version} Base support of the Karaf WebConsole
[uninstalled] [${version} ] webconsole standard-${version} Karaf WebConsole for administration and monitoring
[uninstalled] [${version} ] ssh standard-${version} Provide a SSHd server on Karaf
B. Using Your Favorite Web Container
You can deploy the web application to your favorite web
container, by completing the following steps:
1. In a command prompt/shell, change to the directory
that contains this README.txt file.
2. Enter the following command:
mvn package
Maven builds the web application, web-${version}.war, and
saves it in the target directory of this example. Deploy this
WAR file to your favorite web container. Once the application
is running, you can test it using the Apache Karaf client
as described in the "Running a Client" section above.