2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2019 Nordix Foundation.
4 * Modifications Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
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.models.sim.pdp;
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.models.sim.pdp.exception.PdpSimulatorException;
29 import org.onap.policy.models.sim.pdp.parameters.PdpSimulatorParameterGroup;
30 import org.onap.policy.models.sim.pdp.parameters.PdpSimulatorParameterHandler;
31 import org.slf4j.Logger;
32 import org.slf4j.LoggerFactory;
35 * This class initiates PdpSimulator.
37 * @author Ajith Sreekumar (ajith.sreekumar@est.tech)
39 public class PdpSimulatorMain {
41 private static final String PDP_SIMULATOR_FAIL_MSG = "start of pdp simulator failed";
43 private static final Logger LOGGER = LoggerFactory.getLogger(PdpSimulatorMain.class);
45 private PdpSimulatorActivator activator;
46 private PdpSimulatorParameterGroup parameterGroup;
49 * Instantiates the PdpSimulator.
51 * @param args the command line arguments
53 public PdpSimulatorMain(final String[] args) {
54 if (LOGGER.isInfoEnabled()) {
55 LOGGER.info("In PdpSimulator with parameters {}", Arrays.toString(args));
58 // Check the arguments
59 final PdpSimulatorCommandLineArguments arguments = new PdpSimulatorCommandLineArguments();
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.debug(argumentMessage);
67 // Validate that the arguments are sane
69 } catch (final PdpSimulatorException e) {
70 LOGGER.error(PDP_SIMULATOR_FAIL_MSG, e);
74 // Read the parameters
76 parameterGroup = new PdpSimulatorParameterHandler().getParameters(arguments);
77 } catch (final Exception e) {
78 LOGGER.error(PDP_SIMULATOR_FAIL_MSG, e);
82 // Read the properties
83 final Properties topicProperties = new Properties();
85 final String propFile = arguments.getFullPropertyFilePath();
86 try (FileInputStream stream = new FileInputStream(propFile)) {
87 topicProperties.load(stream);
89 } catch (final Exception e) {
90 LOGGER.error(PDP_SIMULATOR_FAIL_MSG, e);
94 // create the activator
95 activator = new PdpSimulatorActivator(parameterGroup, topicProperties);
96 Registry.register(PdpSimulatorConstants.REG_PDP_SIMULATOR_ACTIVATOR, activator);
97 // Start the activator
99 activator.initialize();
100 } catch (final PdpSimulatorException e) {
101 LOGGER.error("start of PdpSimulator failed, used parameters are {}", Arrays.toString(args), e);
102 Registry.unregister(PdpSimulatorConstants.REG_PDP_SIMULATOR_ACTIVATOR);
106 // Add a shutdown hook to shut everything down in an orderly manner
107 Runtime.getRuntime().addShutdownHook(new PdpSimulatorShutdownHookClass());
109 LOGGER.info("Started PdpSimulator service");
113 * Get the parameters specified in JSON.
115 * @return parameterGroup the parameters
117 public PdpSimulatorParameterGroup getParameters() {
118 return parameterGroup;
123 * Shut down Execution.
125 * @throws PdpSimulatorException on shutdown errors
127 public void shutdown() throws PdpSimulatorException {
128 // clear the parameterGroup variable
129 parameterGroup = null;
131 // clear the pdp simulator activator
132 if (activator != null && activator.isAlive()) {
133 activator.terminate();
138 * The Class PdpSimulatorShutdownHookClass terminates the pdp simulator when its run method is called.
140 private class PdpSimulatorShutdownHookClass extends Thread {
144 * @see java.lang.Runnable#run()
149 // Shutdown the pdp simulator service and wait for everything to stop
150 if (activator != null && activator.isAlive()) {
151 activator.terminate();
153 } catch (final PdpSimulatorException e) {
154 LOGGER.warn("error occured during shut down of the pdp simulator service", e);
162 * @param args the arguments
165 public static void main(final String[] args) {
166 new PdpSimulatorMain(args);