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Running Streaming Integrator as a Linux Service

ESB Streaming Integrator can be run as a Linux service.

Before you begin

Install JDK version 11 and set the JAVA_HOME variable.

Download and install the Streaming Integrator

Go to the ESB Streaming Integrator product page, click Download, and then click Zip Archive to download the product distribution as a ZIP file.

Extract the download ZIP file to a location on your computer. The streaming-integrator folder inside the extracted ZIP file will be your SI_HOME directory.

For more information, see Installing via the Binary

Running ESB Streaming Integrator as a Linux Service

To run ESB Streaming Integrator as a Linux service, follow the steps below:

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

You can write the start up scripts for the Streaming Integrator server and Tooling as follows:

• Streaming Integrator Server

  #! /bin/sh
  export JAVA_HOME="/usr/lib/jvm/jdk1.7.0_07"
  
  startcmd='/opt/WSO2/wso2si-1.1.0/bin/server.sh start > /dev/null &'
  restartcmd='/opt/WSO2/wso2si-1.1.0/bin/server.sh restart > /dev/null &'
  stopcmd='/opt/WSO2/wso2si-1.1.0/bin/server.sh stop > /dev/null &'
  
  case "$1" in
  start)
     echo "Starting ESB Streaming Integrator ..."
     su -c "${startcmd}" user1
  ;;
  restart)
     echo "Re-starting ESB Streaming Integrator ..."
     su -c "${restartcmd}" user1
  ;;
  stop)
     echo "Stopping ESB Streaming Integrator ..."
     su -c "${stopcmd}" user1
  ;;
  *)
     echo "Usage: $0 {start|stop|restart}"
  exit 1
  esac

  - Streaming Integrator Tooling

  #! /bin/sh
  export JAVA_HOME="/usr/lib/jvm/jdk1.7.0_07"
  
  startcmd='/opt/WSO2/wso2si-tooling-1.1.0/bin/tooling.sh start > /dev/null &'
  restartcmd='/opt/WSO2/wso2si-tooling-1.1.0/bin/tooling.sh restart > /dev/null &'
  stopcmd='/opt/WSO2/wso2si-tooling-1.1.0/bin/tooling.sh stop > /dev/null &'
  
  case "$1" in
  start)
     echo "ESB Streaming Integrator Tooling ..."
     su -c "${startcmd}" user1
  ;;
  restart)
     echo "Re-starting ESB Streaming Integrator Tooling ..."
     su -c "${restartcmd}" user1
  ;;
  stop)
     echo "Stopping ESB Streaming Integrator Tooling ..."
     su -c "${stopcmd}" user1
  ;;
  *)
     echo "Usage: $0 {start|stop|restart}"
  exit 1
  esac

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

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

   Info

   If you want to keep the scripts in a location other than /etc/init.d/ directory , you can add a symbolic link to the script in the /etc/init.d/ and keep the actual script in a separate location. e.g., If your script name is siserver and it is in the /opt/WSO2/ directory, then the commands for adding a link to /etc/init.d/ are as follows:
   
   - To make the script executable: sudo chmod a+x /opt/WSO2/appserver
   - To add a link to /etc/init.d/: sudo ln -snf /opt/WSO2/appserver /etc/init.d/appserver

2. Install the startup script to respective run levels via the update-rc.d command. e.g., Issue the following command for the sample script given in step 1.

   sudo update-rc.d appserver defaults

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

   Info

   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.

You can now start, stop and restart the server via the service <service name> {start|stop|restart} command. You will be prompted for the password of the username (or root) via which you started the service.

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