wso2wso2-governance-registry

How to detect while carbon starting or stopping

I used Runtime.getRuntime().exec() to start external program in GREG handler, and get its pid. But how I can detect when the GREG stopping or restarting , that I can stop or restart the external program.

Solution

  • If you want to do execute some custom logic during startup or shutdown phases you can use handlers provided in org.wso2.carbon.core package

    e.g.

    ServerStartupHandler - https://github.com/wso2/carbon-kernel/blob/4.4.x/core/org.wso2.carbon.core/src/main/java/org/wso2/carbon/core/ServerStartupHandler.java

    ServerShutdownHandler - https://github.com/wso2/carbon-kernel/blob/4.4.x/core/org.wso2.carbon.core/src/main/java/org/wso2/carbon/core/ServerShutdownHandler.java

    ServerRestartHandler - https://github.com/wso2/carbon-kernel/blob/4.4.x/core/org.wso2.carbon.core/src/main/java/org/wso2/carbon/core/ServerRestartHandler.java

    Also you may use https://github.com/wso2/carbon-kernel/blob/4.4.x/core/org.wso2.carbon.core/src/main/java/org/wso2/carbon/core/ServerStartupObserver.java to listen to startup events