2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2019 Nordix Foundation.
4 * Modifications Copyright (C) 2019 AT&T Intellectual Property.
5 * ================================================================================
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * SPDX-License-Identifier: Apache-2.0
19 * ============LICENSE_END=========================================================
22 package org.onap.policy.pap.main.startstop;
24 import java.util.Arrays;
25 import java.util.Properties;
26 import org.onap.policy.common.endpoints.utils.ParameterUtils;
27 import org.onap.policy.common.utils.services.Registry;
28 import org.onap.policy.pap.main.PapConstants;
29 import org.onap.policy.pap.main.PolicyPapException;
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
69 } catch (final PolicyPapException e) {
70 LOGGER.error(START_FAILED, e);
74 // Read the parameters
76 parameterGroup = new PapParameterHandler().getParameters(arguments);
77 } catch (final Exception e) {
78 LOGGER.error(START_FAILED, e);
82 // Read the properties
83 Properties props = ParameterUtils.getTopicProperties(parameterGroup.getTopicParameterGroup());
85 // Initialize database
87 new PapDatabaseInitializer().initializePapDatabase(parameterGroup.getDatabaseProviderParameters());
88 } catch (final PolicyPapException exp) {
89 LOGGER.error(START_FAILED + ", used parameters are {}", Arrays.toString(args), exp);
93 // Now, create the activator for the policy pap service
94 activator = new PapActivator(parameterGroup, props);
95 Registry.register(PapConstants.REG_PAP_ACTIVATOR, activator);
97 // Start the activator
100 } catch (final RuntimeException e) {
101 LOGGER.error("start of policy pap service failed, used parameters are {}", Arrays.toString(args), e);
102 Registry.unregister(PapConstants.REG_PAP_ACTIVATOR);
106 // Add a shutdown hook to shut everything down in an orderly manner
107 Runtime.getRuntime().addShutdownHook(new PolicyPapShutdownHookClass());
108 LOGGER.info("Started policy pap service");
112 * Get the parameters specified in JSON.
114 * @return the parameters
116 public PapParameterGroup getParameters() {
117 return parameterGroup;
121 * Shut down Execution.
123 * @throws PolicyPapException on shutdown errors
125 public void shutdown() throws PolicyPapException {
126 // clear the parameterGroup variable
127 parameterGroup = null;
129 // clear the pap activator
130 if (activator != null) {
136 * The Class PolicyPapShutdownHookClass terminates the policy pap service when its run method is called.
138 private class PolicyPapShutdownHookClass extends Thread {
142 * @see java.lang.Runnable#run()
146 if (!activator.isAlive()) {
151 // Shutdown the policy pap service and wait for everything to stop
153 } catch (final RuntimeException e) {
154 LOGGER.warn("error occured during shut down of the policy pap service", e);
162 * @param args the arguments
164 public static void main(final String[] args) {