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.participant.simulator.simulation;
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.participant.intermediary.parameters.ParticipantIntermediaryParameters;
30 import org.onap.policy.clamp.controlloop.participant.simulator.main.parameters.ParticipantSimulatorParameters;
31 import org.onap.policy.clamp.controlloop.participant.simulator.simulation.rest.SimulationElementController;
32 import org.onap.policy.clamp.controlloop.participant.simulator.simulation.rest.SimulationParticipantController;
33 import org.onap.policy.common.endpoints.event.comm.TopicSink;
34 import org.onap.policy.common.endpoints.listeners.MessageTypeDispatcher;
35 import org.onap.policy.common.utils.services.Registry;
36 import org.onap.policy.models.base.PfModelRuntimeException;
39 * This class handles simulation of participants and control loop elements.
41 * <p/>It is effectively a singleton that is started at system start.
43 public class SimulationHandler extends ControlLoopHandler {
44 private final ParticipantIntermediaryParameters participantParameters;
47 private SimulationProvider simulationProvider;
52 * @param parameters the parameters for access to the database
54 public SimulationHandler(ParticipantSimulatorParameters parameters) {
55 super(parameters.getDatabaseProviderParameters());
56 participantParameters = parameters.getIntermediaryParameters();
59 public static SimulationHandler getInstance() {
60 return Registry.get(SimulationHandler.class.getName());
64 public Set<Class<?>> getProviderClasses() {
65 return Set.of(SimulationElementController.class, SimulationParticipantController.class);
69 public void startProviders() {
70 simulationProvider = new SimulationProvider(participantParameters);
74 public void stopProviders() {
76 simulationProvider.close();
77 } catch (IOException e) {
78 throw new PfModelRuntimeException(Response.Status.INTERNAL_SERVER_ERROR, "Stop providers failed ", e);