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.ApiRestServer;
29 import org.onap.policy.common.parameters.ParameterService;
30 import org.slf4j.Logger;
31 import org.slf4j.LoggerFactory;
34 * This class wraps a distributor so that it can be activated as a complete service together with all its api
35 * and forwarding handlers.
37 public class ApiActivator {
39 private static final Logger LOGGER = LoggerFactory.getLogger(ApiActivator.class);
41 private final ApiParameterGroup apiParameterGroup;
43 private static boolean alive = false;
45 private ApiRestServer restServer;
48 * Instantiate the activator for policy api as a complete service.
50 * @param apiParameterGroup the parameters for the api service
52 public ApiActivator(final ApiParameterGroup apiParameterGroup) {
53 this.apiParameterGroup = apiParameterGroup;
57 * Initialize api as a complete service.
59 * @throws PolicyApiException on errors in initializing the service
61 public void initialize() throws PolicyApiException {
62 LOGGER.debug("Policy api starting as a service . . .");
64 registerToParameterService(apiParameterGroup);
65 ApiActivator.setAlive(true);
66 LOGGER.debug("Policy api started as a service");
70 * Starts the api rest server using configuration parameters.
72 * @throws PolicyApiException if server start fails
74 private void startApiRestServer() throws PolicyApiException {
75 apiParameterGroup.getRestServerParameters().setName(apiParameterGroup.getName());
76 restServer = new ApiRestServer(apiParameterGroup.getRestServerParameters());
77 if (!restServer.start()) {
78 throw new PolicyApiException(
79 "Failed to start api rest server. Check log for more details...");
84 * Terminate policy api.
86 * @throws PolicyApiException on termination errors
88 public void terminate() throws PolicyApiException {
90 deregisterToParameterService(apiParameterGroup);
91 ApiActivator.setAlive(false);
93 // Stop the api rest server
95 } catch (final Exception exp) {
96 throw new PolicyApiException("Policy api service termination failed", exp);
101 * Get the parameters used by the activator.
103 * @return the parameters of the activator
105 public ApiParameterGroup getParameterGroup() {
106 return apiParameterGroup;
110 * Method to register the parameters to Common Parameter Service.
112 * @param apiParameterGroup the api parameter group
114 public void registerToParameterService(final ApiParameterGroup apiParameterGroup) {
115 ParameterService.register(apiParameterGroup);
119 * Method to deregister the parameters from Common Parameter Service.
121 * @param apiParameterGroup the api parameter group
123 public void deregisterToParameterService(final ApiParameterGroup apiParameterGroup) {
124 ParameterService.deregister(apiParameterGroup.getName());
128 * Returns the alive status of api service.
132 public static boolean isAlive() {
137 * Change the alive status of api service.
139 * @param status the status
141 public static void setAlive(final boolean status) {