Examples of co.cask.cdap.common.twill.MasterServiceManager

co.cask.cdap.common.twill.MasterServiceManager
Interface that defines a set of methods that will be used for management of CDAP Services. Each individual service must provide an implementation.

    JsonObject reply = new JsonObject();
    if (!serviceManagementMap.containsKey(serviceName)) {
      responder.sendString(HttpResponseStatus.NOT_FOUND, String.format("Invalid service name %s", serviceName));
      return;
    }
    MasterServiceManager serviceManager = serviceManagementMap.get(serviceName);
    if (serviceManager.isServiceEnabled()) {
      int actualInstance = serviceManagementMap.get(serviceName).getInstances();
      reply.addProperty("provisioned", actualInstance);
      reply.addProperty("requested", getSystemServiceInstanceCount(serviceName));
      responder.sendJson(HttpResponseStatus.OK, reply);
    } else {

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      if (!serviceManagementMap.containsKey(serviceName)) {
        responder.sendString(HttpResponseStatus.NOT_FOUND, "Invalid Service Name");
        return;
      }


      MasterServiceManager serviceManager = serviceManagementMap.get(serviceName);
      int instance = getInstances(request);
      if (!serviceManager.isServiceEnabled()) {
        responder.sendString(HttpResponseStatus.FORBIDDEN, String.format("Service %s is not enabled", serviceName));
        return;
      }


      Integer currentInstance = getSystemServiceInstanceCount(serviceName);
      if (instance < serviceManager.getMinInstances() || instance > serviceManager.getMaxInstances()) {
        String response = String.format("Instance count should be between [%s,%s]", serviceManager.getMinInstances(),
                                        serviceManager.getMaxInstances());
        responder.sendString(HttpResponseStatus.BAD_REQUEST, response);
        return;
      } else if (instance == currentInstance) {
        responder.sendStatus(HttpResponseStatus.OK);
        return;
      }


      serviceStore.setServiceInstance(serviceName, instance);
      if (serviceManager.setInstances(instance)) {
        responder.sendStatus(HttpResponseStatus.OK);
      } else {
        responder.sendString(HttpResponseStatus.BAD_REQUEST, "Operation did not succeed");
      }
    } catch (Exception e) {

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  @Path("/system/services/status")
  @GET
  public void getBootStatus(final HttpRequest request, final HttpResponder responder) {
    Map<String, String> result = new HashMap<String, String>();
    for (String service : serviceManagementMap.keySet()) {
      MasterServiceManager masterServiceManager = serviceManagementMap.get(service);
      if (masterServiceManager.isServiceEnabled() && masterServiceManager.canCheckStatus()) {
        String status = masterServiceManager.isServiceAvailable() ? STATUSOK : STATUSNOTOK;
        result.put(service, status);
      }
    }
    responder.sendJson(HttpResponseStatus.OK, result);
  }

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                      @PathParam("service-name") final String serviceName) {
    if (!serviceManagementMap.containsKey(serviceName)) {
      responder.sendString(HttpResponseStatus.NOT_FOUND, String.format("Invalid service name %s", serviceName));
      return;
    }
    MasterServiceManager masterServiceManager = serviceManagementMap.get(serviceName);
    if (!masterServiceManager.isServiceEnabled()) {
      responder.sendString(HttpResponseStatus.FORBIDDEN, String.format("Service %s is not enabled", serviceName));
      return;
    }
    if (masterServiceManager.canCheckStatus() && masterServiceManager.isServiceAvailable()) {
      JsonObject json = new JsonObject();
      json.addProperty("status", STATUSOK);
      responder.sendJson(HttpResponseStatus.OK, json);
    } else if (masterServiceManager.canCheckStatus()) {
      JsonObject json = new JsonObject();
      json.addProperty("status", STATUSNOTOK);
      responder.sendJson(HttpResponseStatus.OK, json);
    } else {
      responder.sendString(HttpResponseStatus.BAD_REQUEST, "Operation not valid for this service");

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  public void getServiceSpec(final HttpRequest request, final HttpResponder responder) throws Exception {
    List<SystemServiceMeta> response = Lists.newArrayList();
    SortedSet<String> services = new TreeSet<String>(serviceManagementMap.keySet());
    List<String> serviceList = new ArrayList<String>(services);
    for (String service : serviceList) {
      MasterServiceManager serviceManager = serviceManagementMap.get(service);
      if (serviceManager.isServiceEnabled()) {
        String logs = serviceManager.isLogAvailable() ? Constants.Monitor.STATUS_OK : Constants.Monitor.STATUS_NOTOK;
        String canCheck = serviceManager.canCheckStatus() ? (
                          serviceManager.isServiceAvailable() ? STATUSOK : STATUSNOTOK) : NOTAPPLICABLE;
        //TODO: Add metric name for Event Rate monitoring
        response.add(new SystemServiceMeta(service, serviceManager.getDescription(), canCheck, logs,
                                           serviceManager.getMinInstances(), serviceManager.getMaxInstances(),
                                           getSystemServiceInstanceCount(service), serviceManager.getInstances()));
      }
    }
    responder.sendJson(HttpResponseStatus.OK, response);
  }

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Related Classes of co.cask.cdap.common.twill.MasterServiceManager

co.cask.cdap.gateway.handlers.MonitorHandler

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