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.dmaap.startstop;
24 import java.util.Arrays;
25 import org.onap.policy.models.sim.dmaap.DmaapSimException;
26 import org.onap.policy.models.sim.dmaap.parameters.DmaapSimParameterGroup;
27 import org.onap.policy.models.sim.dmaap.parameters.DmaapSimParameterHandler;
28 import org.slf4j.Logger;
29 import org.slf4j.LoggerFactory;
32 * This class initiates the DMaaP simulator component.
36 private static final Logger LOGGER = LoggerFactory.getLogger(Main.class);
38 private DmaapSimActivator activator;
39 private DmaapSimParameterGroup parameterGroup;
42 * Instantiates the DMaap Simulator service.
44 * @param args the command line arguments
46 public Main(final String[] args) {
47 final String argumentString = Arrays.toString(args);
48 LOGGER.info("Starting DMaaP simulator service with arguments - {}", argumentString);
50 // Check the arguments
51 final DmaapSimCommandLineArguments arguments = new DmaapSimCommandLineArguments();
53 // The arguments return a string if there is a message to print and we should exit
54 final String argumentMessage = arguments.parse(args);
55 if (argumentMessage != null) {
56 LOGGER.info(argumentMessage);
59 // Validate that the arguments are sane
61 } catch (final DmaapSimException e) {
62 LOGGER.error("start of DMaaP simulator service failed", e);
66 // Read the parameters
68 parameterGroup = new DmaapSimParameterHandler().getParameters(arguments);
69 } catch (final Exception e) {
70 LOGGER.error("start of DMaaP simulator service failed", e);
74 // Now, create the activator for the DMaaP Simulator service
75 activator = new DmaapSimActivator(parameterGroup);
77 // Start the activator
80 } catch (final RuntimeException e) {
81 LOGGER.error("start of DMaaP simulator service failed, used parameters are {}", Arrays.toString(args), e);
85 // Add a shutdown hook to shut everything down in an orderly manner
86 Runtime.getRuntime().addShutdownHook(new DmaapSimShutdownHookClass());
87 LOGGER.info("Started DMaaP simulator service");
91 * Get the parameters specified in JSON.
93 * @return the parameters
95 public DmaapSimParameterGroup getParameters() {
96 return parameterGroup;
100 * Shut down Execution.
102 * @throws DmaapSimException on shutdown errors
104 public void shutdown() throws DmaapSimException {
105 // clear the parameterGroup variable
106 parameterGroup = null;
108 // clear the DMaaP simulator activator
109 if (activator != null && activator.isAlive()) {
115 * The Class DmaapSimShutdownHookClass terminates the DMaaP simulator service when its run method is called.
117 private class DmaapSimShutdownHookClass extends Thread {
121 * @see java.lang.Runnable#run()
126 // Shutdown the DMaaP simulator service and wait for everything to stop
129 } catch (final RuntimeException | DmaapSimException e) {
130 LOGGER.warn("error occured during shut down of the DMaaP simulator service", e);
138 * @param args the arguments
140 public static void main(final String[] args) { // NOSONAR
142 * The arguments are validated by the constructor, thus sonar is disabled.