2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2018 Samsung Electronics Co., Ltd. All rights reserved.
6 * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
7 * ================================================================================
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
20 * SPDX-License-Identifier: Apache-2.0
21 * ============LICENSE_END=========================================================
24 package org.onap.policy.api.main.startstop;
26 import org.onap.policy.api.main.exception.PolicyApiException;
27 import org.onap.policy.api.main.parameters.ApiParameterGroup;
28 import org.onap.policy.api.main.rest.ApiRestController;
29 import org.onap.policy.api.main.rest.aaf.AafApiFilter;
30 import org.onap.policy.common.endpoints.http.server.RestServer;
31 import org.onap.policy.common.parameters.ParameterService;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
36 * This class wraps a distributor so that it can be activated as a complete service together with all its api and
37 * forwarding handlers.
39 public class ApiActivator {
41 private static final Logger LOGGER = LoggerFactory.getLogger(ApiActivator.class);
43 private final ApiParameterGroup apiParameterGroup;
45 private static boolean alive = false;
47 private RestServer restServer;
50 * Instantiate the activator for policy api as a complete service.
52 * @param apiParameterGroup the parameters for the api service
54 public ApiActivator(final ApiParameterGroup apiParameterGroup) {
55 this.apiParameterGroup = apiParameterGroup;
59 * Initialize api as a complete service.
61 * @throws PolicyApiException on errors in initializing the service
63 public void initialize() throws PolicyApiException {
64 LOGGER.debug("Policy api starting as a service . . .");
66 registerToParameterService(apiParameterGroup);
67 ApiActivator.setAlive(true);
68 LOGGER.debug("Policy api started as a service");
72 * Starts the api rest server using configuration parameters.
74 * @throws PolicyApiException if server start fails
76 private void startApiRestServer() throws PolicyApiException {
77 apiParameterGroup.getRestServerParameters().setName(apiParameterGroup.getName());
78 restServer = new RestServer(apiParameterGroup.getRestServerParameters(), AafApiFilter.class,
79 ApiRestController.class);
80 if (!restServer.start()) {
81 throw new PolicyApiException("Failed to start api rest server. Check log for more details...");
86 * Terminate policy api.
88 * @throws PolicyApiException on termination errors
90 public void terminate() throws PolicyApiException {
92 deregisterToParameterService(apiParameterGroup);
94 if (ApiActivator.isAlive()) {
95 ApiActivator.setAlive(false);
98 // Stop the api rest server
99 if (restServer.isAlive()) {
102 } catch (final Exception exp) {
103 throw new PolicyApiException("Policy api service termination failed", exp);
108 * Get the parameters used by the activator.
110 * @return the parameters of the activator
112 public ApiParameterGroup getParameterGroup() {
113 return apiParameterGroup;
117 * Method to register the parameters to Common Parameter Service.
119 * @param apiParameterGroup the api parameter group
121 public void registerToParameterService(final ApiParameterGroup apiParameterGroup) {
122 ParameterService.register(apiParameterGroup, true);
126 * Method to deregister the parameters from Common Parameter Service.
128 * @param apiParameterGroup the api parameter group
130 public void deregisterToParameterService(final ApiParameterGroup apiParameterGroup) {
131 if (ParameterService.contains(apiParameterGroup.getName())) {
132 ParameterService.deregister(apiParameterGroup.getName());
137 * Returns the alive status of api service.
141 public static boolean isAlive() {
146 * Change the alive status of api service.
148 * @param status the status
150 public static void setAlive(final boolean status) {