[POLICY-119] noop endpoint and refactoring

noop endpoint was added to support communication between drools-applications
and policy-framework using the common "PolicyEngine.deliver(topic, message)"
mechanins.   The endpoint type will be noop.   This can be used for testing
sanity of any given drools-application from the framework.

An intial refactoring of the endpoints hierarchy was added too.

Change-Id: I62dbe75f511dd6215406fbd7cf0dd5a88bc1efc3
Signed-off-by: Jorge Hernandez <jh1730@att.com>

2 files changed, 120 insertions, 0 deletions

diff --git a/policy-endpoints/src/test/java/org/openecomp/policy/drools/http/server/test/HttpServerTest.java b/policy-endpoints/src/test/java/org/openecomp/policy/drools/http/server/test/HttpServerTest.java
index 02047008..6be96320 100644
--- a/policy-endpoints/src/test/java/org/openecomp/policy/drools/http/server/test/HttpServerTest.java
+++ b/policy-endpoints/src/test/java/org/openecomp/policy/drools/http/server/test/HttpServerTest.java
@@ -37,6 +37,9 @@ import org.slf4j.LoggerFactory;
  */
 public class HttpServerTest {
 	
+	/**
+	 * Logger
+	 */
 	private static Logger logger = LoggerFactory.getLogger(HttpServerTest.class);
 
 	@Test
diff --git a/policy-endpoints/src/test/java/org/openecomp/policy/drools/http/server/test/NoopTopicTest.java b/policy-endpoints/src/test/java/org/openecomp/policy/drools/http/server/test/NoopTopicTest.java
new file mode 100644
index 00000000..924c2a2c
--- /dev/null
+++ b/policy-endpoints/src/test/java/org/openecomp/policy/drools/http/server/test/NoopTopicTest.java
@@ -0,0 +1,117 @@
+/*-
+ * ============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.http.server.test;
+
+import static org.junit.Assert.assertTrue;
+
+import java.util.List;
+import java.util.Properties;
+
+import org.junit.Test;
+import org.openecomp.policy.drools.event.comm.Topic.CommInfrastructure;
+import org.openecomp.policy.drools.event.comm.TopicEndpoint;
+import org.openecomp.policy.drools.event.comm.TopicListener;
+import org.openecomp.policy.drools.event.comm.TopicSink;
+import org.openecomp.policy.drools.event.comm.bus.NoopTopicSink;
+import org.openecomp.policy.drools.properties.PolicyProperties;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * NOOP Endpoint Tests
+ */
+public class NoopTopicTest implements TopicListener {
+	
+	/**
+	 * Logger
+	 */
+	private static Logger logger = LoggerFactory.getLogger(NoopTopicTest.class);
+	
+	private final String topicName = "junit-noop";
+	private final String outMessage = "blah";
+	private String inMessage = null;
+	
+	@Test
+	public void testNoopEndpoint() {
+		logger.info("-- testNoopEndpoint() --");
+		
+		Properties noopSinkProperties = new Properties();
+		noopSinkProperties.put(PolicyProperties.PROPERTY_NOOP_SINK_TOPICS, topicName);
+		
+		List<? extends TopicSink> noopTopics = 
+				TopicEndpoint.manager.addTopicSinks(noopSinkProperties);
+		
+		TopicSink sink = NoopTopicSink.factory.get(topicName);
+		
+		assertTrue(noopTopics.size() == 1);	
+		assertTrue(noopTopics.size() == NoopTopicSink.factory.inventory().size());	
+		assertTrue(noopTopics.get(0) == sink);
+		assertTrue(sink == NoopTopicSink.factory.inventory().get(0));
+		
+		assertTrue(!sink.isAlive());
+		
+		boolean badState = false;
+		try{ 
+			sink.send(outMessage);
+		} catch(IllegalStateException e) {
+			badState = true;
+		}		
+		assertTrue(badState);
+		
+		sink.start();
+		assertTrue(sink.isAlive());
+		
+		sink.send(outMessage);
+		assertTrue(sink.getRecentEvents().length == 1);
+		assertTrue(sink.getRecentEvents()[0].equals(outMessage));
+		assertTrue(this.inMessage ==  null);
+		
+		sink.register(this);
+		sink.send(this.outMessage);
+		assertTrue(outMessage.equals(this.inMessage));
+		this.inMessage = null;
+		
+		sink.unregister(this);
+		sink.send(this.outMessage);
+		assertTrue(!outMessage.equals(this.inMessage));
+		
+		sink.stop();
+		try{ 
+			sink.send(outMessage);
+		} catch(IllegalStateException e) {
+			badState = true;
+		}		
+		assertTrue(badState);
+		
+		NoopTopicSink.factory.destroy(topicName);
+		assertTrue(NoopTopicSink.factory.inventory().size() == 0);			
+	}
+
+	@Override
+	public void onTopicEvent(CommInfrastructure commType, String topic, String event) {
+		if (commType != CommInfrastructure.NOOP)
+			return;
+		
+		if (topic == null || !topic.equals(topicName))
+			return;
+		
+		this.inMessage = event;
+	}
+}