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;
28 import org.onap.policy.common.utils.services.Registry;
29 import org.onap.policy.pap.main.PapConstants;
30 import org.onap.policy.pap.main.PolicyPapException;
31 import org.onap.policy.pap.main.parameters.PapParameterGroup;
32 import org.onap.policy.pap.main.parameters.PapParameterHandler;
33 import org.slf4j.Logger;
34 import org.slf4j.LoggerFactory;
37 * This class initiates ONAP Policy Framework PAP component.
39 * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
43 private static final String START_FAILED = "start of policy pap service failed";
45 private static final Logger LOGGER = LoggerFactory.getLogger(Main.class);
47 private PapActivator activator;
48 private PapParameterGroup parameterGroup;
51 * Instantiates the policy pap service.
53 * @param args the command line arguments
55 public Main(final String[] args) {
56 final String argumentString = Arrays.toString(args);
57 LOGGER.info("Starting policy pap service with arguments - {}", argumentString);
59 // Check the arguments
60 final PapCommandLineArguments arguments = new PapCommandLineArguments();
62 // The arguments return a string if there is a message to print and we should exit
63 final String argumentMessage = arguments.parse(args);
64 if (argumentMessage != null) {
65 LOGGER.info(argumentMessage);
68 // Validate that the arguments are sane
70 } catch (final PolicyPapException e) {
71 LOGGER.error(START_FAILED, e);
75 // Read the parameters
77 parameterGroup = new PapParameterHandler().getParameters(arguments);
78 } catch (final Exception e) {
79 LOGGER.error(START_FAILED, e);
83 // Read the properties
84 final Properties props = new Properties();
86 final String propFile = arguments.getFullPropertyFilePath();
87 try (FileInputStream stream = new FileInputStream(propFile)) {
90 } catch (final Exception e) {
91 LOGGER.error(START_FAILED, e);
95 // Initialize database
97 new PapDatabaseInitializer().initializePapDatabase(parameterGroup.getDatabaseProviderParameters());
98 } catch (final PolicyPapException exp) {
99 LOGGER.error(START_FAILED + ", used parameters are {}", Arrays.toString(args), exp);
103 // Now, create the activator for the policy pap service
104 activator = new PapActivator(parameterGroup, props);
105 Registry.register(PapConstants.REG_PAP_ACTIVATOR, activator);
107 // Start the activator
110 } catch (final RuntimeException e) {
111 LOGGER.error("start of policy pap service failed, used parameters are {}", Arrays.toString(args), e);
112 Registry.unregister(PapConstants.REG_PAP_ACTIVATOR);
116 // Add a shutdown hook to shut everything down in an orderly manner
117 Runtime.getRuntime().addShutdownHook(new PolicyPapShutdownHookClass());
118 LOGGER.info("Started policy pap service");
122 * Get the parameters specified in JSON.
124 * @return the parameters
126 public PapParameterGroup getParameters() {
127 return parameterGroup;
131 * Shut down Execution.
133 * @throws PolicyPapException on shutdown errors
135 public void shutdown() throws PolicyPapException {
136 // clear the parameterGroup variable
137 parameterGroup = null;
139 // clear the pap activator
140 if (activator != null) {
146 * The Class PolicyPapShutdownHookClass terminates the policy pap service when its run method is called.
148 private class PolicyPapShutdownHookClass extends Thread {
152 * @see java.lang.Runnable#run()
156 if (!activator.isAlive()) {
161 // Shutdown the policy pap service and wait for everything to stop
163 } catch (final RuntimeException e) {
164 LOGGER.warn("error occured during shut down of the policy pap service", e);
172 * @param args the arguments
174 public static void main(final String[] args) {