2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2019 Nordix Foundation.
4 * Modifications Copyright (C) 2019 AT&T Intellectual Property.
5 * Modifications Copyright (C) 2020 Bell Canada. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
19 * SPDX-License-Identifier: Apache-2.0
20 * ============LICENSE_END=========================================================
23 package org.onap.policy.pap.main.startstop;
25 import java.util.Arrays;
26 import org.onap.policy.common.utils.services.Registry;
27 import org.onap.policy.pap.main.PapConstants;
28 import org.onap.policy.pap.main.PolicyPapException;
29 import org.onap.policy.pap.main.PolicyPapRuntimeException;
30 import org.onap.policy.pap.main.parameters.PapParameterGroup;
31 import org.onap.policy.pap.main.parameters.PapParameterHandler;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
36 * This class initiates ONAP Policy Framework PAP component.
38 * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
42 private static final String START_FAILED = "start of policy pap service failed";
44 private static final Logger LOGGER = LoggerFactory.getLogger(Main.class);
46 private PapActivator activator;
47 private PapParameterGroup parameterGroup;
50 * Instantiates the policy pap service.
52 * @param args the command line arguments
54 public Main(final String[] args) {
55 final String argumentString = Arrays.toString(args);
56 LOGGER.info("Starting policy pap service with arguments - {}", argumentString);
58 // Check the arguments
59 final PapCommandLineArguments arguments = new PapCommandLineArguments();
61 // The arguments return a string if there is a message to print and we should exit
62 final String argumentMessage = arguments.parse(args);
63 if (argumentMessage != null) {
64 LOGGER.info(argumentMessage);
67 // Validate that the arguments are sane
70 // Read the parameters
71 parameterGroup = new PapParameterHandler().getParameters(arguments);
73 // Initialize database
74 new PapDatabaseInitializer().initializePapDatabase(parameterGroup.getDatabaseProviderParameters());
76 // Now, create the activator for the policy pap service
77 activator = new PapActivator(parameterGroup);
78 Registry.register(PapConstants.REG_PAP_ACTIVATOR, activator);
80 // Start the activator
82 } catch (Exception exp) {
83 if (null != activator) {
84 Registry.unregister(PapConstants.REG_PAP_ACTIVATOR);
86 throw new PolicyPapRuntimeException(START_FAILED + ", used parameters are " + Arrays.toString(args), exp);
89 // Add a shutdown hook to shut everything down in an orderly manner
90 Runtime.getRuntime().addShutdownHook(new PolicyPapShutdownHookClass());
91 LOGGER.info("Started policy pap service");
95 * Get the parameters specified in JSON.
97 * @return the parameters
99 public PapParameterGroup getParameters() {
100 return parameterGroup;
104 * Shut down Execution.
106 * @throws PolicyPapException on shutdown errors
108 public void shutdown() throws PolicyPapException {
109 // clear the parameterGroup variable
110 parameterGroup = null;
112 // clear the pap activator
113 if (activator != null) {
119 * The Class PolicyPapShutdownHookClass terminates the policy pap service when its run method is called.
121 private class PolicyPapShutdownHookClass extends Thread {
125 * @see java.lang.Runnable#run()
129 if (!activator.isAlive()) {
134 // Shutdown the policy pap service and wait for everything to stop
136 } catch (final RuntimeException e) {
137 LOGGER.warn("error occured during shut down of the policy pap service", e);
145 * @param args the arguments
147 public static void main(final String[] args) { // NOSONAR
149 * NOTE: arguments are validated by the constructor, thus sonar is disabled.