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;
25 import javax.ws.rs.core.Response;
27 import org.onap.policy.clamp.controlloop.common.handler.ControlLoopHandler;
28 import org.onap.policy.clamp.controlloop.runtime.main.parameters.ClRuntimeParameterGroup;
29 import org.onap.policy.clamp.controlloop.runtime.monitoring.rest.MonitoringQueryController;
30 import org.onap.policy.common.utils.services.Registry;
31 import org.onap.policy.models.base.PfModelRuntimeException;
34 * This class handles monitoring of control loop definitions,
35 * so only one object of this type should be built at a time.
38 * It is effectively a singleton that is started at system start.
40 public class MonitoringHandler extends ControlLoopHandler {
43 private MonitoringProvider monitoringProvider;
46 * Gets the Monitoring Handler.
48 * @return MonitoringHandler
50 public static MonitoringHandler getInstance() {
51 return Registry.get(MonitoringHandler.class.getName());
57 * @param controlLoopParameters the parameters for access to the database
59 public MonitoringHandler(ClRuntimeParameterGroup controlLoopParameters) {
60 super(controlLoopParameters.getDatabaseProviderParameters());
64 public Set<Class<?>> getProviderClasses() {
65 return Set.of(MonitoringQueryController.class);
69 public void startProviders() {
70 monitoringProvider = new MonitoringProvider(getDatabaseProviderParameters());
74 public void stopProviders() {
76 monitoringProvider.close();
77 } catch (IOException e) {
78 throw new PfModelRuntimeException(Response.Status.INTERNAL_SERVER_ERROR, "Cannot stop provider", e);