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.instantiation;
23 import java.io.IOException;
24 import java.util.HashSet;
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.runtime.commissioning.rest.CommissioningController;
31 import org.onap.policy.clamp.controlloop.runtime.instantiation.rest.InstantiationController;
32 import org.onap.policy.clamp.controlloop.runtime.main.parameters.ClRuntimeParameterGroup;
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 instantiation of control loop instances,
40 * so only one object of this type should be built at a time.
43 * It is effectively a singleton that is started at system start
45 public final class InstantiationHandler extends ControlLoopHandler {
48 private ControlLoopInstantiationProvider controlLoopInstantiationProvider;
51 * Gets the InstantiationHandler.
53 * @return InstantiationHandler
55 public static InstantiationHandler getInstance() {
56 return Registry.get(InstantiationHandler.class.getName());
62 * @param controlLoopParameters the parameters for access to the database
64 public InstantiationHandler(ClRuntimeParameterGroup controlLoopParameters) {
65 super(controlLoopParameters.getDatabaseProviderParameters());
69 public Set<Class<?>> getProviderClasses() {
70 return Set.of(InstantiationController.class);
74 public void startAndRegisterListeners(MessageTypeDispatcher msgDispatcher) {
75 // No topic communication on this handler
79 public void startAndRegisterPublishers(List<TopicSink> topicSinks) {
80 // No topic communication on this handler
84 public void stopAndUnregisterPublishers() {
85 // No topic communication on this handler
89 public void stopAndUnregisterListeners(MessageTypeDispatcher msgDispatcher) {
90 // No topic communication on this handler
94 public void startProviders() {
95 controlLoopInstantiationProvider = new ControlLoopInstantiationProvider(getDatabaseProviderParameters());
99 public void stopProviders() {
101 controlLoopInstantiationProvider.close();
102 } catch (IOException e) {
103 throw new PfModelRuntimeException(Response.Status.INTERNAL_SERVER_ERROR, e.getMessage());