2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2018 Samsung Electronics Co., Ltd. All rights reserved.
6 * Modifications Copyright (C) 2019, 2021 AT&T Intellectual Property. All rights reserved.
7 * Modifications Copyright (C) 2019 Nordix Foundation.
8 * ================================================================================
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
13 * http://www.apache.org/licenses/LICENSE-2.0
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
21 * SPDX-License-Identifier: Apache-2.0
22 * ============LICENSE_END=========================================================
25 package org.onap.policy.api.main.rest.provider;
27 import org.onap.policy.api.main.rest.PolicyFetchMode;
28 import org.onap.policy.api.main.startstop.ApiActivator;
29 import org.onap.policy.common.endpoints.report.HealthCheckReport;
30 import org.onap.policy.common.utils.network.NetworkUtil;
31 import org.onap.policy.models.base.PfModelException;
32 import org.onap.policy.models.base.PfModelRuntimeException;
33 import org.slf4j.Logger;
34 import org.slf4j.LoggerFactory;
37 * Class to fetch health check of api service.
40 public class HealthCheckProvider {
42 private static final Logger LOGGER = LoggerFactory.getLogger(HealthCheckProvider.class);
44 private static final String NOT_ALIVE = "not alive";
45 private static final String ALIVE = "alive";
46 private static final String URL = NetworkUtil.getHostname();
47 private static final String NAME = "Policy API";
48 private static final String DB_CONN_FAILURE = "unable to connect with database";
51 * Performs the health check of api service.
53 * @return Report containing health check status
55 public HealthCheckReport performHealthCheck() {
56 final var report = new HealthCheckReport();
59 boolean heathStatus = ApiActivator.isAlive();
61 boolean dbConnectionStatus = verifyApiDatabase();
62 report.setHealthy(dbConnectionStatus);
63 report.setCode(dbConnectionStatus ? 200 : 503);
64 report.setMessage(dbConnectionStatus ? ALIVE : DB_CONN_FAILURE);
66 report.setHealthy(heathStatus);
68 report.setMessage(NOT_ALIVE);
74 * Verifies the connectivity between api component & policy database.
76 * @return boolean signaling the verification result
78 private boolean verifyApiDatabase() {
79 try (var policyProvider = new PolicyProvider()) {
80 policyProvider.fetchPolicies(null, null, null, null, PolicyFetchMode.BARE);
82 } catch (PfModelException | PfModelRuntimeException pfme) {
83 LOGGER.warn("Api to database connection check failed. Details - ", pfme);