1 files changed, 226 insertions, 0 deletions
diff --git a/policy-endpoints/src/main/java/org/onap/policy/drools/event/comm/bus/NoopTopicSinkFactory.java b/policy-endpoints/src/main/java/org/onap/policy/drools/event/comm/bus/NoopTopicSinkFactory.java
new file mode 100644
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--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/drools/event/comm/bus/NoopTopicSinkFactory.java
@@ -0,0 +1,226 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * policy-endpoints
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.policy.drools.event.comm.bus;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Properties;
+
+import org.onap.policy.drools.properties.PolicyProperties;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Noop Topic Sink Factory
+ */
+public interface NoopTopicSinkFactory {
+	
+	/**
+	 * Creates noop topic sinks based on properties files
+	 * 
+	 * @param properties Properties containing initialization values
+	 * 
+	 * @return a noop topic sink
+	 * @throws IllegalArgumentException if invalid parameters are present
+	 */
+	public List<NoopTopicSink> build(Properties properties) 
+			throws IllegalArgumentException;
+
+	/**
+	 * builds a noop sink
+	 *  
+	 * @param servers list of servers
+	 * @param topic topic name
+	 * @param managed is this sink endpoint managed?
+	 * @return a noop topic sink
+	 * @throws IllegalArgumentException if invalid parameters are present
+	 */
+	public NoopTopicSink build(List<String> servers, String topic, boolean managed) 
+			throws IllegalArgumentException;
+	
+	/**
+	 * Destroys a sink based on the topic
+	 * 
+	 * @param topic topic name
+	 * @throws IllegalArgumentException if invalid parameters are present
+	 */
+	public void destroy(String topic);
+
+	/**
+	 * gets a sink based on topic name
+	 * @param topic the topic name
+	 * 
+	 * @return a sink with topic name
+	 * @throws IllegalArgumentException if an invalid topic is provided
+	 * @throws IllegalStateException if the sink is in an incorrect state
+	 */
+	public NoopTopicSink get(String topic)
+			   throws IllegalArgumentException, IllegalStateException;
+	
+	/**
+	 * Provides a snapshot of the UEB Topic Writers
+	 * @return a list of the UEB Topic Writers
+	 */
+	public List<NoopTopicSink> inventory();
+
+	/**
+	 * Destroys all sinks
+	 */
+	public void destroy();
+}
+
+/* ------------- implementation ----------------- */
+
+/**
+ * Factory of noop sinks
+ */
+class IndexedNoopTopicSinkFactory implements NoopTopicSinkFactory {
+	/**
+	 * Logger 
+	 */
+	private static Logger logger = LoggerFactory.getLogger(IndexedUebTopicSinkFactory.class);	
+	
+	/**
+	 * noop topic sinks map
+	 */
+	protected HashMap<String, NoopTopicSink> noopTopicSinks = new HashMap<String, NoopTopicSink>();
+
+	@Override
+	public List<NoopTopicSink> build(Properties properties) throws IllegalArgumentException {
+		
+		String sinkTopics = properties.getProperty(PolicyProperties.PROPERTY_NOOP_SINK_TOPICS);
+		if (sinkTopics == null || sinkTopics.isEmpty()) {
+			logger.info("{}: no topic for noop sink", this);
+			return new ArrayList<NoopTopicSink>();
+		}
+		
+		List<String> sinkTopicList = new ArrayList<String>(Arrays.asList(sinkTopics.split("\\s*,\\s*")));
+		List<NoopTopicSink> newSinks = new ArrayList<NoopTopicSink>();
+		synchronized(this) {
+			for (String topic: sinkTopicList) {
+				if (this.noopTopicSinks.containsKey(topic)) {
+					newSinks.add(this.noopTopicSinks.get(topic));
+					continue;
+				}
+				
+				String servers = properties.getProperty(PolicyProperties.PROPERTY_NOOP_SINK_TOPICS + "." + 
+				                                        topic + 
+				                                        PolicyProperties.PROPERTY_TOPIC_SERVERS_SUFFIX);
+				
+				if (servers == null || servers.isEmpty()) 
+					servers = "noop";
+				
+				List<String> serverList = new ArrayList<String>(Arrays.asList(servers.split("\\s*,\\s*")));
+				
+				String managedString = properties.getProperty(PolicyProperties.PROPERTY_UEB_SINK_TOPICS + "." + topic +
+						                                      PolicyProperties.PROPERTY_MANAGED_SUFFIX);
+				boolean managed = true;
+				if (managedString != null && !managedString.isEmpty()) {
+					managed = Boolean.parseBoolean(managedString);
+				}			
+				
+				NoopTopicSink noopSink = this.build(serverList, topic, managed);
+				newSinks.add(noopSink);
+			}
+			return newSinks;
+		}
+	}
+
+	@Override
+	public NoopTopicSink build(List<String> servers, String topic, boolean managed) throws IllegalArgumentException {
+		if (servers == null) {
+			servers = new ArrayList<>();
+		}
+		
+		if (servers.isEmpty()) {
+			servers.add("noop");
+		}
+
+		if (topic == null || topic.isEmpty()) {
+			throw new IllegalArgumentException("A topic must be provided");
+		}
+		
+		synchronized (this) {
+			if (noopTopicSinks.containsKey(topic)) {
+				return noopTopicSinks.get(topic);
+			}
+			
+			NoopTopicSink sink = 
+					new NoopTopicSink(servers, topic);
+			
+			if (managed)
+				noopTopicSinks.put(topic, sink);
+			
+			return sink;
+		}
+	}
+
+	@Override
+	public void destroy(String topic) {		
+		if (topic == null || topic.isEmpty()) {
+			throw new IllegalArgumentException("A topic must be provided");
+		}
+		
+		NoopTopicSink noopSink;
+		synchronized(this) {
+			if (!noopTopicSinks.containsKey(topic)) {
+				return;
+			}
+			
+			noopSink = noopTopicSinks.remove(topic);
+		}
+		
+		noopSink.shutdown();
+	}
+	
+	@Override
+	public void destroy() {
+		List<NoopTopicSink> sinks = this.inventory();
+		for (NoopTopicSink sink: sinks) {
+			sink.shutdown();
+		}
+		
+		synchronized(this) {
+			this.noopTopicSinks.clear();
+		}
+	}
+
+	@Override
+	public NoopTopicSink get(String topic) throws IllegalArgumentException, IllegalStateException {
+		if (topic == null || topic.isEmpty()) {
+			throw new IllegalArgumentException("A topic must be provided");
+		}
+		
+		synchronized(this) {
+			if (noopTopicSinks.containsKey(topic)) {
+				return noopTopicSinks.get(topic);
+			} else {
+				throw new IllegalStateException("DmaapTopicSink for " + topic + " not found");
+			}
+		}
+	}
+
+	@Override
+	public List<NoopTopicSink> inventory() {
+		 return new ArrayList<>(this.noopTopicSinks.values());
+	}
+}