2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2019 Nordix Foundation.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.models.sim.dmaap.startstop;
23 import java.util.Arrays;
25 import org.onap.policy.common.utils.services.Registry;
26 import org.onap.policy.models.sim.dmaap.DmaapSimConstants;
27 import org.onap.policy.models.sim.dmaap.DmaapSimException;
28 import org.onap.policy.models.sim.dmaap.parameters.DmaapSimParameterGroup;
29 import org.onap.policy.models.sim.dmaap.parameters.DmaapSimParameterHandler;
30 import org.slf4j.Logger;
31 import org.slf4j.LoggerFactory;
34 * This class initiates the DMaaP simulator component.
38 private static final Logger LOGGER = LoggerFactory.getLogger(Main.class);
40 private DmaapSimActivator activator;
41 private DmaapSimParameterGroup parameterGroup;
44 * Instantiates the DMaap Simulator service.
46 * @param args the command line arguments
48 public Main(final String[] args) {
49 final String argumentString = Arrays.toString(args);
50 LOGGER.info("Starting DMaaP simulator service with arguments - {}", argumentString);
52 // Check the arguments
53 final DmaapSimCommandLineArguments arguments = new DmaapSimCommandLineArguments();
55 // The arguments return a string if there is a message to print and we should exit
56 final String argumentMessage = arguments.parse(args);
57 if (argumentMessage != null) {
58 LOGGER.info(argumentMessage);
61 // Validate that the arguments are sane
63 } catch (final DmaapSimException e) {
64 LOGGER.error("start of DMaaP simulator service failed", e);
68 // Read the parameters
70 parameterGroup = new DmaapSimParameterHandler().getParameters(arguments);
71 } catch (final Exception e) {
72 LOGGER.error("start of DMaaP simulator service failed", e);
76 // Now, create the activator for the DMaaP Simulator service
77 activator = new DmaapSimActivator(parameterGroup);
78 Registry.register(DmaapSimConstants.REG_DMAAP_SIM_ACTIVATOR, activator);
80 // Start the activator
83 } catch (final RuntimeException e) {
84 LOGGER.error("start of DMaaP simulator service failed, used parameters are {}", Arrays.toString(args), e);
85 Registry.unregister(DmaapSimConstants.REG_DMAAP_SIM_ACTIVATOR);
89 // Add a shutdown hook to shut everything down in an orderly manner
90 Runtime.getRuntime().addShutdownHook(new DmaapSimShutdownHookClass());
91 LOGGER.info("Started DMaaP simulator service");
95 * Get the parameters specified in JSON.
97 * @return the parameters
99 public DmaapSimParameterGroup getParameters() {
100 return parameterGroup;
104 * Shut down Execution.
106 * @throws DmaapSimException on shutdown errors
108 public void shutdown() throws DmaapSimException {
109 // clear the parameterGroup variable
110 parameterGroup = null;
112 // clear the DMaaP simulator activator
113 if (activator != null) {
119 * The Class DmaapSimShutdownHookClass terminates the DMaaP simulator service when its run method is called.
121 private class DmaapSimShutdownHookClass extends Thread {
125 * @see java.lang.Runnable#run()
130 // Shutdown the DMaaP simulator service and wait for everything to stop
132 } catch (final RuntimeException e) {
133 LOGGER.warn("error occured during shut down of the DMaaP simulator service", e);
141 * @param args the arguments
143 public static void main(final String[] args) {