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top
2.1. Quick Start (Source)
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If
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you
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are
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in
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a
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hurry
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to
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have
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Apache
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Karaf
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up
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and
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running
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right
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away,
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this
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section
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will
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provide
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you
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with
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some
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basic
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steps
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for
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checking
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out,
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building
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and
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running
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the
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server
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in
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no
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time.
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This
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is
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clearly
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not
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a
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complete
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guide
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so
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you
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may
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want
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to
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check
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other
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sections
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of
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this
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guide
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for
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further
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information.
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All
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you
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need
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is
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15
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minutes
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and
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to
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follow
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these
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basic
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steps.
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Background
Apache Karaf is a small and lightweight OSGi based runtime. This provides a small lightweight container onto which various bundles can be deployed.
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Apache Felix Karaf started life as the Apache ServiceMix kernel and then moved as a Apache Felix subproject.
Don't be surprised by any transitional references which remain.
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Getting the software
This document describes how to build the server from the latest Karaf source.
Prerequisites
Although this installation path is the fastest one, still you will need to install some software before installing Karaf.
Karaf requires a Java 5 environment to run. Refer to http://java.sun.com
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for
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details
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on
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how
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to
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download
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and
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install
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J2SE
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1.5
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or
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greater.
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Subversion is required to checkout the source.
Maven 2 is required to build Karaf.
Checkout Source
The Karaf source is found at http://svn.apache.org/repos/asf/
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/.
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To
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check
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out
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with
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a
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command
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line
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client:
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Build
Change directory to the top level of the source checkout. Build Karaf using Maven as follows:
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Distributions will be created in assembly/target. Select the file compression format compatible with your system (apache-karaf-2.0.0.zip
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for
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windows,
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apache-
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karaf-
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2.0.0.tar.gz
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for
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unixes)
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and
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expand
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the
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binary
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in
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a
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new
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directory;
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for
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example
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in
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z:\karaf
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-
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from
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now
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on
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this
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directory
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will
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be
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referenced
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as
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<KARAF_HOME>.
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Please
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remember
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the
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restrictions
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concerning
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illegal
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characters
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in
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Java
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paths,
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e.g.
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!,
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%
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etc.
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The
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installation
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of
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Karaf
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is
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as
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simple
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as
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uncompressing
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the
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.zip
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or
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.tar
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files.
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The
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next
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step
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is
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to
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start
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the
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server.
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To generate Eclipse projects for all modules, in KARAF_HOME
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type:
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mvn
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-Psetup.eclipse
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Then
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add
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each
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module
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location,
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prefixing
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each
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name
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with
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org.apache
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.karaf
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(for
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example
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org.apache
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.karaf.shell.core
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)
Start the server
With Karaf already installed, open a command line console and change directory to <KARAF_HOME>. To start the server, run the following command in Windows:
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respectively on Unix:
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You should see the following informations on the command line console:
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You can now run your first command. Simply type the <tab>
key in the console.
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Deploy a sample application
While you will learn in the remainder of this guide how to use and leverage Apache Felix Karaf, we will just use the pre-built packaging for now.
In the console, run the following commands:
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This
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commands
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will
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download,
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install
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and
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start
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the
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specified
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jars.
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The
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example
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installed
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is
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using
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to
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start
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a
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timer
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every
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2
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seconds
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and
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output
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a
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message
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on
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the
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console.
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Stopping and uninstalling the sample application
To stop this demo, run the following command:
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In the output, locate the line containing camel-example-osgi
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and
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note
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the
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id
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of
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the
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bundle
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in
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the
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first
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column.
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Then
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launch
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the
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following
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command:
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If
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you
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wish,
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you
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can
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start
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again
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the
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sample
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by
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using
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the
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following
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command:
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To
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uninstall
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the
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demo,
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run
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the
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following
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command:
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Common Problems
- Launching SMX4 can result in a deadlock in Felix during module dependency resolution. This is often a result of sending a SIGINT (control-C)
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- to
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- the
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- process
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- when
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- it
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- will
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- not
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- cleanly
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- exit.
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- This
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- can
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- corrupt
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- the
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- caches
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- and
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- cause
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- startup
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- problems
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- in
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- the
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- very
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- next
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- launch.
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- It
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- is
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- fixed
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- by
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- emptying
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- the
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- component
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- cache:
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rm
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-rf
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data/cache/*
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Stopping Karaf
To stop Karaf from the console, enter ^D
in the console:
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Alternatively, you can also run the following command:
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Summary
This document showed you how simple it is to have Apache Karaf up and running. The overall time for getting the server running should be less than five minutes if you have the prerequisite (Java 1.5) already installed. Additionally, this article also showed you how to deploy and test a simple Apache Camel application in less than five minutes.
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