2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Copyright (C) 2017 Amdocs
8 * =============================================================================
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
13 * http://www.apache.org/licenses/LICENSE-2.0
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
21 * ============LICENSE_END=========================================================
24 package org.onap.appc.listener;
26 import org.onap.appc.configuration.Configuration;
27 import org.onap.appc.configuration.ConfigurationFactory;
28 import org.onap.appc.listener.impl.ControllerImpl;
30 import com.att.eelf.configuration.EELFLogger;
31 import com.att.eelf.configuration.EELFManager;
33 import java.util.HashSet;
34 import java.util.Properties;
38 * This activator is used to initialize and terminate the dmaap listener controller and pool(s)
40 * The DMaaP listener is responsible for listening to a topic on the Universal Event Bus and reading in messages that
41 * conform to the DCAE message format for APPC. These messages will then be parsed and passed along to the APPC Provider
42 * to take action on. The listener will also send messages out on DMaaP during critical phases. The messages sent out
43 * will have a status of:
45 * <li><i>PENDING</i> - The listener has read the message off of DMaaP and has put it in the queue to be processed</li>
46 * <li><i>ACTIVE</i> - The listener has begun actually processing the request and is waiting on the appc provider to
47 * complete the request</li>
48 * <li><i>SUCCESS</i> or <i>FAILURE</i> - The listener has gotten a response back from the appc provider. If it is a
49 * FAILURE, a message should also be included</li>
53 * Activation of the bundle will provision 1 controller that in turn will provision 1 (or in the future more) listener
54 * to interact with DMaaP. Each listener will have a queue of messages read off of DMaaP and a thread pool of workers to
55 * process them. This worker is responsible for contacting appc provider to perform the action
58 * When the bundle is deactivated, the stopNow() method is called and the thread pool is emptied and all remaining jobs
59 * are orphaned. Alternatively stop() could be called which would allow all remaining jobs in the queue to complete at
60 * the cost of longer run time.
66 public class AppcEventListenerActivator {
70 * The configuration object
72 private Configuration configuration;
75 * The reference to the actual implementation object that implements the services
77 private Controller adapter;
80 * The logger to be used
82 private final EELFLogger LOG = EELFManager.getInstance().getLogger(AppcEventListenerActivator.class);
85 * Called when this bundle is started so the Framework can perform the bundle-specific activities necessary to start
86 * this bundle. This method can be used to register services or to allocate any resources that this bundle needs.
88 * This method must complete and return to its caller in a timely manner.
92 * The execution context of the bundle being started.
93 * @throws java.lang.Exception
94 * If this method throws an exception, this bundle is marked as stopped and the Framework will remove
95 * this bundle's listeners, unregister all services registered by this bundle, and release all services
96 * used by this bundle.
97 * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
99 public void start() throws Exception {
100 LOG.info("Starting Bundle " + getName());
102 Properties props = getProperties();
104 Set<ListenerProperties> listeners = new HashSet<>();
106 // Configure event listener for the demo use case
107 ListenerProperties demoProps = new ListenerProperties("appc.demo", props);
108 // Only add the listener if properties are set
109 if (!demoProps.getProperties().isEmpty()) {
110 demoProps.setListenerClass(org.onap.appc.listener.demo.impl.ListenerImpl.class);
111 listeners.add(demoProps);
115 ListenerProperties clLCMProps = new ListenerProperties("appc.LCM", props);
116 // Only add the listener if properties are set
117 if (!clLCMProps.getProperties().isEmpty()) {
118 clLCMProps.setListenerClass(org.onap.appc.listener.LCM.impl.ListenerImpl.class);
119 listeners.add(clLCMProps);
123 // Configure the OAM properties
124 String oamPropKeyPrefix = "appc.OAM";
125 ListenerProperties oamProps = new ListenerProperties(oamPropKeyPrefix, props);
126 // Only add the listener if properties are set and enabled is true
127 if (!oamProps.getProperties().isEmpty() && isAppcOamPropsListenerEnabled(oamProps)) {
128 oamProps.setListenerClass(org.onap.appc.listener.LCM.impl.ListenerImpl.class);
129 listeners.add(oamProps);
131 LOG.warn(String.format("The listener %s is disabled and will not be run", oamPropKeyPrefix));
134 adapter = new ControllerImpl(listeners);
137 LOG.info("DMaaP Listener started successfully");
141 * Called when this bundle is stopped so the Framework can perform the bundle-specific activities necessary to stop
142 * the bundle. In general, this method should undo the work that the BundleActivator.start method started. There
143 * should be no active threads that were started by this bundle when this bundle returns. A stopped bundle must not
144 * call any Framework objects.
146 * This method must complete and return to its caller in a timely manner.
150 * The execution context of the bundle being stopped.
151 * @throws java.lang.Exception
152 * If this method throws an exception, the bundle is still marked as stopped, and the Framework will
153 * remove the bundle's listeners, unregister all services registered by the bundle, and release all
154 * services used by the bundle. *
155 * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
157 public void stop() throws Exception {
158 boolean stopNow = true;
159 LOG.info("Stopping DMaaP Listener. StopNow=" + stopNow);
160 adapter.stop(stopNow);
161 LOG.info("DMaaP Listener stopped successfully");
164 public String getName() {
165 return "DMaaP Listener";
169 * Check if AppcOam props disable listener or not
171 * @param listenerProperties of ListenerProperties objext
172 * @return false only if AppcOam disabled key is defined and equal to true. Otherwise, return true.
174 private boolean isAppcOamPropsListenerEnabled(ListenerProperties listenerProperties) {
175 final Properties appcOamProperties = listenerProperties.getProperties();
178 if (appcOamProperties == null) {
181 result = !Boolean.parseBoolean(appcOamProperties.getProperty(
182 ListenerProperties.KEYS.DISABLED.getPropertySuffix()));
189 * Get properties from configuration
191 Properties getProperties() {
192 configuration = ConfigurationFactory.getConfiguration();
193 return configuration.getProperties();