This documentation is for WSO2 Complex Event Processor 4.0.0. View documentation for the latest release.
WSO2 Complex Event Processor is succeeded by WSO2 Stream Processor. To view the latest documentation for WSO2 SP, see WSO2 Stream Processor Documentation.
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WSO2 Carbon and any Carbon-based product can be run as a Linux service as described in the following sections:

Prerequisites

Install JDK and set up the JAVA_HOME environment variable. For more information, see Installation Prerequisites.

Setting up CARBON_HOME

Extract the WSO2 product that you want to run as a Linux service and set the environment variable CARBON_HOME to the extracted product directory location.

Running the product as a Linux service

  1. To run the product as a service, create a startup script and add it to the boot sequence. The basic structure of the startup script has three parts (i.e., start, stop and restart) as follows:

    #!/bin/bash
     
    case “$1″ in
    start)
       echo “Starting Service”
    ;;
    stop)
       echo “Stopping Service”
    ;;
    restart)
       echo “Restarting Service”
    ;;
    *)
       echo $”Usage: $0 {start|stop|restart}”
    exit 1
    esac

    For example, given below is a startup script:

    #! /bin/sh
    export JAVA_HOME="/usr/lib/jvm/jdk1.7.0_07"
    
    startcmd='/opt/WSO2/wso2cep-4.0.0/bin/wso2server.sh start > /dev/null &'
    restartcmd='/opt/WSO2/wso2cep-4.0.0/bin/wso2server.sh restart > /dev/null &'
    stopcmd='/opt/WSO2/wso2cep-4.0.0/bin/wso2server.sh stop > /dev/null &'
    
    case "$1" in
    start)
       echo "Starting WSO2 Complex Event Processor ..."
       su -c "${startcmd}" user1
    ;;
    restart)
       echo "Re-starting WSO2 Complex Event Processor ..."
       su -c "${restartcmd}" user1
    ;;
    stop)
       echo "Stopping WSO2 Complex Event Processor ..."
       su -c "${stopcmd}" user1
    ;;
    *)
       echo "Usage: $0 {start|stop|restart}"
    exit 1
    esac

    In the above script, the server is started as a user by the name user1 rather than the root user. For example, su -c "${startcmd}" user1 

  2. Add the script to /etc/init.d/ directory.

    If you want to keep the scripts in a location other than /etc/init.d/ folder , you can add a symbolic link to the script in /etc/init.d/ and keep the actual script in a separate location. Say your script name is cepserver and it is in /opt/WSO2/ folder, then the commands for adding a link to /etc/init.d/ is as follows:

    • Make executable: sudo chmod a+x /opt/WSO2/cepserver

    • Add a link to /etc/init.d/: sudo ln -snf /opt/WSO2/cepserver /etc/init.d/cepserver
  3. Install the startup script to respective runlevels using the command update-rc.d . For example, give the following command for the sample script shown in step1:

    sudo update-rc.d cepserver defaults 

    The defaults option in the above command makes the service to start in runlevels 2,3,4 and 5 and to stop in runlevels 0,1 and 6.

    A runlevel is a mode of operation in Linux (or any Unix-style operating system). There are several runlevels in a Linux server and each of these runlevels is represented by a single digit integer. Each runlevel designates a different system configuration and allows access to a different combination of processes.

  4. You can now st art, stop and restart the server using service <service name> {start|stop|restart} command. You will be prompted for the password of the user (or root) who was used to start the service.   
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