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;
26 import org.onap.policy.pap.main.PolicyPapException;
27 import org.onap.policy.pap.main.parameters.PapParameterGroup;
28 import org.onap.policy.pap.main.parameters.PapParameterHandler;
29 import org.slf4j.Logger;
30 import org.slf4j.LoggerFactory;
33 * This class initiates ONAP Policy Framework PAP component.
35 * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
39 private static final Logger LOGGER = LoggerFactory.getLogger(Main.class);
41 private PapActivator activator;
42 private PapParameterGroup parameterGroup;
45 * Instantiates the policy pap service.
47 * @param args the command line arguments
49 public Main(final String[] args) {
50 final String argumentString = Arrays.toString(args);
51 LOGGER.info("Starting policy pap service with arguments - {}", argumentString);
53 // Check the arguments
54 final PapCommandLineArguments arguments = new PapCommandLineArguments();
56 // The arguments return a string if there is a message to print and we should exit
57 final String argumentMessage = arguments.parse(args);
58 if (argumentMessage != null) {
59 LOGGER.info(argumentMessage);
62 // Validate that the arguments are sane
64 } catch (final PolicyPapException e) {
65 LOGGER.error("start of policy pap service failed", e);
69 // Read the parameters
71 parameterGroup = new PapParameterHandler().getParameters(arguments);
72 } catch (final Exception e) {
73 LOGGER.error("start of policy pap service failed", e);
77 // Now, create the activator for the policy pap service
78 activator = new PapActivator(parameterGroup);
79 PapActivator.setCurrent(activator);
81 // Start the activator
83 activator.initialize();
84 } catch (final PolicyPapException e) {
85 LOGGER.error("start of policy pap service failed, used parameters are {}", Arrays.toString(args), e);
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) {
114 activator.terminate();
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()
130 // Shutdown the policy pap service and wait for everything to stop
131 activator.terminate();
132 } catch (final PolicyPapException e) {
133 LOGGER.warn("error occured during shut down of the policy pap service", e);
141 * @param args the arguments
143 public static void main(final String[] args) {