Examples with ClusterEvent org.apache.zeppelin.cluster.event.ClusterEvent used on opensource projects

Example 1 with ClusterEvent

use of org.apache.zeppelin.cluster.event.ClusterEvent in project zeppelin by apache.

the class ClusterInterpreterLauncher method onClusterEvent.

@Override
public void onClusterEvent(String msg) {
    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug(msg);
    }
    try {
        Gson gson = new Gson();
        Map<String, Object> mapEvent = gson.fromJson(msg, new TypeToken<Map<String, Object>>() {
        }.getType());
        String sEvent = (String) mapEvent.get(CLUSTER_EVENT);
        ClusterEvent clusterEvent = ClusterEvent.valueOf(sEvent);
        switch(clusterEvent) {
            case CREATE_INTP_PROCESS:
                // 1）Other zeppelin servers in the cluster send requests to create an interpreter process
                // 2）After the interpreter process is created, and the interpreter is started,
                // the interpreter registers the thrift ip and port into the cluster metadata.
                // 3）Other servers connect through the IP and port of thrift in the cluster metadata,
                // using this remote interpreter process
                String eventMsg = (String) mapEvent.get(CLUSTER_EVENT_MSG);
                InterpreterLaunchContext context = gson.fromJson(eventMsg, new TypeToken<InterpreterLaunchContext>() {
                }.getType());
                InterpreterClient intpProcess = createInterpreterProcess(context);
                intpProcess.start(context.getUserName());
                break;
            default:
                LOGGER.error("Unknown clusterEvent:{}, msg:{} ", clusterEvent, msg);
                break;
        }
    } catch (IOException e) {
        LOGGER.error(e.getMessage(), e);
    }
}