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.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 Logger LOGGER = LoggerFactory.getLogger(Main.class);
44 private PapActivator activator;
45 private PapParameterGroup parameterGroup;
48 * Instantiates the policy pap service.
50 * @param args the command line arguments
52 public Main(final String[] args) {
53 final String argumentString = Arrays.toString(args);
54 LOGGER.info("Starting policy pap service with arguments - {}", argumentString);
56 // Check the arguments
57 final PapCommandLineArguments arguments = new PapCommandLineArguments();
59 // The arguments return a string if there is a message to print and we should exit
60 final String argumentMessage = arguments.parse(args);
61 if (argumentMessage != null) {
62 LOGGER.info(argumentMessage);
65 // Validate that the arguments are sane
67 } catch (final PolicyPapException e) {
68 LOGGER.error("start of policy pap service failed", e);
72 // Read the parameters
74 parameterGroup = new PapParameterHandler().getParameters(arguments);
75 } catch (final Exception e) {
76 LOGGER.error("start of policy pap service failed", e);
80 // Read the properties
81 Properties props = new Properties();
83 String propFile = arguments.getFullPropertyFilePath();
84 try (FileInputStream stream = new FileInputStream(propFile)) {
87 } catch (final Exception e) {
88 LOGGER.error("start of policy pap service failed", e);
92 // Now, create the activator for the policy pap service
93 activator = new PapActivator(parameterGroup, props);
94 Registry.register(PapConstants.REG_PAP_ACTIVATOR, activator);
96 // Start the activator
99 } catch (final RuntimeException e) {
100 LOGGER.error("start of policy pap service failed, used parameters are {}", Arrays.toString(args), e);
101 Registry.unregister(PapConstants.REG_PAP_ACTIVATOR);
105 // Add a shutdown hook to shut everything down in an orderly manner
106 Runtime.getRuntime().addShutdownHook(new PolicyPapShutdownHookClass());
107 LOGGER.info("Started policy pap service");
111 * Get the parameters specified in JSON.
113 * @return the parameters
115 public PapParameterGroup getParameters() {
116 return parameterGroup;
120 * Shut down Execution.
122 * @throws PolicyPapException on shutdown errors
124 public void shutdown() throws PolicyPapException {
125 // clear the parameterGroup variable
126 parameterGroup = null;
128 // clear the pap activator
129 if (activator != null) {
135 * The Class PolicyPapShutdownHookClass terminates the policy pap service when its run method is called.
137 private class PolicyPapShutdownHookClass extends Thread {
141 * @see java.lang.Runnable#run()
146 // Shutdown the policy pap service and wait for everything to stop
148 } catch (final RuntimeException e) {
149 LOGGER.warn("error occured during shut down of the policy pap service", e);
157 * @param args the arguments
159 public static void main(final String[] args) {