1 files changed, 204 insertions, 0 deletions
diff --git a/policy-endpoints/src/main/java/org/openecomp/policy/drools/event/comm/bus/internal/BusConsumer.java b/policy-endpoints/src/main/java/org/openecomp/policy/drools/event/comm/bus/internal/BusConsumer.java
new file mode 100644
index 00000000..6fee5ce0
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/openecomp/policy/drools/event/comm/bus/internal/BusConsumer.java
@@ -0,0 +1,204 @@
+/*-
+ * ============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.openecomp.policy.drools.event.comm.bus.internal;
+
+import java.net.MalformedURLException;
+import java.security.GeneralSecurityException;
+import java.util.List;
+import java.util.Properties;
+
+import com.att.nsa.cambria.client.CambriaClientBuilders;
+import com.att.nsa.cambria.client.CambriaConsumer;
+import com.att.nsa.mr.client.impl.MRConsumerImpl;
+import com.att.nsa.mr.test.clients.ProtocolTypeConstants;
+import com.att.nsa.cambria.client.CambriaClientBuilders.ConsumerBuilder;
+
+/**
+ * Wrapper around libraries to consume from message bus
+ *
+ */
+public interface BusConsumer {
+	
+	/**
+	 * fetch messages
+	 * 
+	 * @return list of messages
+	 * @throws Exception when error encountered by underlying libraries
+	 */
+	public Iterable<String> fetch() throws Exception;
+	
+	/**
+	 * close underlying library consumer
+	 */
+	public void close();
+
+	/**
+	 * Cambria based consumer
+	 */
+	public static class CambriaConsumerWrapper implements BusConsumer {
+		/**
+		 * Cambria client
+		 */
+		protected CambriaConsumer consumer;
+		
+		/**
+		 * Cambria Consumer Wrapper
+		 * 
+		 * @param servers messaging bus hosts
+		 * @param topic topic
+		 * @param apiKey API Key
+		 * @param apiSecret API Secret
+		 * @param consumerGroup Consumer Group
+		 * @param consumerInstance Consumer Instance
+		 * @param fetchTimeout Fetch Timeout
+		 * @param fetchLimit Fetch Limit
+		 * @throws GeneralSecurityException 
+		 * @throws MalformedURLException 
+		 */
+		public CambriaConsumerWrapper(List<String> servers, String topic, 
+								  String apiKey, String apiSecret,
+								  String consumerGroup, String consumerInstance,
+								  int fetchTimeout, int fetchLimit) 
+		       throws IllegalArgumentException {
+			
+			ConsumerBuilder builder = 
+					new CambriaClientBuilders.ConsumerBuilder();
+			
+			builder.knownAs(consumerGroup, consumerInstance)
+			       .usingHosts(servers)
+			       .onTopic(topic)
+			       .waitAtServer(fetchTimeout)
+			       .receivingAtMost(fetchLimit);
+			
+			if (apiKey != null && !apiKey.isEmpty() &&
+				apiSecret != null && !apiSecret.isEmpty()) {
+				builder.authenticatedBy(apiKey, apiSecret);
+			}
+					
+			try {
+				this.consumer = builder.build();
+			} catch (MalformedURLException | GeneralSecurityException e) {
+				throw new IllegalArgumentException(e);
+			}
+		}
+		
+		/**
+		 * {@inheritDoc}
+		 */
+		public Iterable<String> fetch() throws Exception {
+			return this.consumer.fetch();
+		}
+		
+		/**
+		 * {@inheritDoc}
+		 */
+		public void close() {
+			this.consumer.close();
+		}
+		
+		@Override
+		public String toString() {
+			return "CambriaConsumerWrapper []";
+		}
+	}
+	
+	/**
+	 * MR based consumer
+	 */
+	public static class DmaapConsumerWrapper implements BusConsumer {
+		
+		/**
+		 * MR Consumer
+		 */
+		protected MRConsumerImpl consumer;
+		
+		/**
+		 * MR Consumer Wrapper
+		 * 
+		 * @param servers messaging bus hosts
+		 * @param topic topic
+		 * @param apiKey API Key
+		 * @param apiSecret API Secret
+		 * @param aafLogin AAF Login
+		 * @param aafPassword AAF Password
+		 * @param consumerGroup Consumer Group
+		 * @param consumerInstance Consumer Instance
+		 * @param fetchTimeout Fetch Timeout
+		 * @param fetchLimit Fetch Limit
+		 */
+		public DmaapConsumerWrapper(List<String> servers, String topic, 
+								String apiKey, String apiSecret,
+								String aafLogin, String aafPassword,
+								String consumerGroup, String consumerInstance,
+								int fetchTimeout, int fetchLimit) 
+		throws Exception {
+					
+			this.consumer = new MRConsumerImpl(servers, topic, 
+											   consumerGroup, consumerInstance, 
+											   fetchTimeout, fetchLimit, 
+									           null, apiKey, apiSecret);
+			
+			this.consumer.setUsername(aafLogin);
+			this.consumer.setPassword(aafPassword);
+			
+			this.consumer.setProtocolFlag(ProtocolTypeConstants.AAF_AUTH.getValue());
+			
+			Properties props = new Properties();
+			props.setProperty("Protocol", "http");
+			this.consumer.setProps(props);
+			this.consumer.setHost(servers.get(0) + ":3904");;
+		}
+		
+		/**
+		 * {@inheritDoc}
+		 */
+		public Iterable<String> fetch() throws Exception {
+			return this.consumer.fetch();
+		}
+		
+		/**
+		 * {@inheritDoc}
+		 */
+		public void close() {
+			this.consumer.close();
+		}
+		
+		@Override
+		public String toString() {
+			StringBuilder builder = new StringBuilder();
+			builder.
+			append("DmaapConsumerWrapper [").
+			append("consumer.getAuthDate()=").append(consumer.getAuthDate()).
+			append(", consumer.getAuthKey()=").append(consumer.getAuthKey()).
+			append(", consumer.getHost()=").append(consumer.getHost()).
+			append(", consumer.getProtocolFlag()=").append(consumer.getProtocolFlag()).
+			append(", consumer.getUsername()=").append(consumer.getUsername()).
+			append("]");
+			return builder.toString();
+		}
+	}
+
+	
+}
+
+
+
+