2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2021 Nordix Foundation.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.clamp.controlloop.runtime.monitoring;
23 import java.io.IOException;
24 import java.util.List;
26 import javax.ws.rs.core.Response;
28 import org.onap.policy.clamp.controlloop.common.handler.ControlLoopHandler;
29 import org.onap.policy.clamp.controlloop.runtime.main.parameters.ClRuntimeParameterGroup;
30 import org.onap.policy.clamp.controlloop.runtime.monitoring.rest.MonitoringQueryController;
31 import org.onap.policy.common.endpoints.event.comm.TopicSink;
32 import org.onap.policy.common.endpoints.listeners.MessageTypeDispatcher;
33 import org.onap.policy.common.utils.services.Registry;
34 import org.onap.policy.models.base.PfModelRuntimeException;
37 * This class handles monitoring of control loop definitions,
38 * so only one object of this type should be built at a time.
41 * It is effectively a singleton that is started at system start.
43 public class MonitoringHandler extends ControlLoopHandler {
46 private MonitoringProvider monitoringProvider;
49 * Gets the Monitoring Handler.
51 * @return MonitoringHandler
53 public static MonitoringHandler getInstance() {
54 return Registry.get(MonitoringHandler.class.getName());
60 * @param controlLoopParameters the parameters for access to the database
62 public MonitoringHandler(ClRuntimeParameterGroup controlLoopParameters) {
63 super(controlLoopParameters.getDatabaseProviderParameters());
67 public Set<Class<?>> getProviderClasses() {
68 return Set.of(MonitoringQueryController.class);
72 public void startProviders() {
73 monitoringProvider = new MonitoringProvider(getDatabaseProviderParameters());
77 public void stopProviders() {
79 monitoringProvider.close();
80 } catch (IOException e) {
81 throw new PfModelRuntimeException(Response.Status.INTERNAL_SERVER_ERROR, "Cannot stop provider", e);