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.dcae.main.handler;
23 import java.io.IOException;
24 import java.util.Collections;
25 import java.util.List;
27 import javax.ws.rs.core.Response;
29 import org.onap.policy.clamp.controlloop.common.handler.ControlLoopHandler;
30 import org.onap.policy.clamp.controlloop.participant.dcae.main.parameters.ParticipantDcaeParameters;
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 dcae of participants and control loop elements.
40 * It is effectively a singleton that is started at system start.
42 public class DcaeHandler extends ControlLoopHandler {
44 private final ParticipantDcaeParameters parameters;
46 private DcaeProvider dcaeProvider;
51 * @param parameters the parameters for access to the database
53 public DcaeHandler(ParticipantDcaeParameters parameters) {
54 super(parameters.getDatabaseProviderParameters());
55 this.parameters = parameters;
58 public static DcaeHandler getInstance() {
59 return Registry.get(DcaeHandler.class.getName());
63 public Set<Class<?>> getProviderClasses() {
64 return Collections.emptySet();
68 public void startProviders() {
69 dcaeProvider = new DcaeProvider(parameters);
73 public void stopProviders() {
76 } catch (IOException e) {
77 throw new PfModelRuntimeException(Response.Status.INTERNAL_SERVER_ERROR, e.getMessage());