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.io.FileInputStream;
25 import java.util.Arrays;
26 import java.util.Properties;
27 import org.onap.policy.pap.main.PolicyPapException;
28 import org.onap.policy.pap.main.parameters.PapParameterGroup;
29 import org.onap.policy.pap.main.parameters.PapParameterHandler;
30 import org.slf4j.Logger;
31 import org.slf4j.LoggerFactory;
34 * This class initiates ONAP Policy Framework PAP component.
36 * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
40 private static final Logger LOGGER = LoggerFactory.getLogger(Main.class);
42 private PapActivator activator;
43 private PapParameterGroup parameterGroup;
46 * Instantiates the policy pap service.
48 * @param args the command line arguments
50 public Main(final String[] args) {
51 final String argumentString = Arrays.toString(args);
52 LOGGER.info("Starting policy pap service with arguments - {}", argumentString);
54 // Check the arguments
55 final PapCommandLineArguments arguments = new PapCommandLineArguments();
57 // The arguments return a string if there is a message to print and we should exit
58 final String argumentMessage = arguments.parse(args);
59 if (argumentMessage != null) {
60 LOGGER.info(argumentMessage);
63 // Validate that the arguments are sane
65 } catch (final PolicyPapException e) {
66 LOGGER.error("start of policy pap service failed", e);
70 // Read the parameters
72 parameterGroup = new PapParameterHandler().getParameters(arguments);
73 } catch (final Exception e) {
74 LOGGER.error("start of policy pap service failed", e);
78 // Read the properties
79 Properties props = new Properties();
81 String propFile = arguments.getFullPropertyFilePath();
82 try (FileInputStream stream = new FileInputStream(propFile)) {
85 } catch (final Exception e) {
86 LOGGER.error("start of policy pap service failed", e);
90 // Now, create the activator for the policy pap service
91 activator = new PapActivator(parameterGroup, props);
93 // Start the activator
95 activator.initialize();
96 } catch (final PolicyPapException e) {
97 LOGGER.error("start of policy pap service failed, used parameters are {}", Arrays.toString(args), e);
101 // Add a shutdown hook to shut everything down in an orderly manner
102 Runtime.getRuntime().addShutdownHook(new PolicyPapShutdownHookClass());
103 LOGGER.info("Started policy pap service");
107 * Get the parameters specified in JSON.
109 * @return the parameters
111 public PapParameterGroup getParameters() {
112 return parameterGroup;
116 * Shut down Execution.
118 * @throws PolicyPapException on shutdown errors
120 public void shutdown() throws PolicyPapException {
121 // clear the parameterGroup variable
122 parameterGroup = null;
124 // clear the pap activator
125 if (activator != null) {
126 activator.terminate();
131 * The Class PolicyPapShutdownHookClass terminates the policy pap service when its run method is called.
133 private class PolicyPapShutdownHookClass extends Thread {
137 * @see java.lang.Runnable#run()
142 // Shutdown the policy pap service and wait for everything to stop
143 activator.terminate();
144 } catch (final PolicyPapException e) {
145 LOGGER.warn("error occured during shut down of the policy pap service", e);
153 * @param args the arguments
155 public static void main(final String[] args) {