Adds a MessageBusInterceptor

org.springframework.integration/src/test/java/org/springframework/integration/bus/interceptor/MessageBusInterceptorTests.java

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+/*
+ * Copyright 2002-2008 the original author or authors.
+ *
+ * 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.
+ */
+
+package org.springframework.integration.bus.interceptor;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.junit.Test;
+import org.springframework.integration.bus.MessageBus;
+
+/**
+ * @author Marius Bogoevici
+ */
+public class MessageBusInterceptorTests {
+
+	@Test
+	public void testStart() {
+		MessageBus messageBus = new MessageBus();
+		TestMessageBusStartInterceptor startInterceptor = new TestMessageBusStartInterceptor();
+		TestMessageBusStopInterceptor stopInterceptor = new TestMessageBusStopInterceptor();
+		// add all interceptors
+		messageBus.addInterceptor(startInterceptor);
+		messageBus.addInterceptor(stopInterceptor);
+		// check the state of the interceptors
+		assertEquals(startInterceptor.getPreStartCounter().get(), 0);
+		assertEquals(startInterceptor.getPostStartCounter().get(), 0);
+		assertEquals(stopInterceptor.getPreStopCounter().get(), 0);
+		assertEquals(stopInterceptor.getPostStopCounter().get(), 0);
+		// start the bus
+		messageBus.start();
+		// check the state of the interceptors
+		assertEquals(startInterceptor.getPreStartCounter().get(), 1);
+		assertEquals(startInterceptor.getPostStartCounter().get(), 1);
+		assertEquals(stopInterceptor.getPreStopCounter().get(), 0);
+		assertEquals(stopInterceptor.getPostStopCounter().get(), 0);
+		//stop the bus
+		messageBus.stop();
+		//check the state of the interceptors
+		assertEquals(startInterceptor.getPreStartCounter().get(), 1);
+		assertEquals(startInterceptor.getPostStartCounter().get(), 1);
+		assertEquals(stopInterceptor.getPreStopCounter().get(), 1);
+		assertEquals(stopInterceptor.getPostStopCounter().get(), 1);
+	}
+	
+
+	private static class TestMessageBusStartInterceptor extends MessageBusInterceptorAdapter {
+
+		private AtomicInteger preStartCounter = new AtomicInteger(0);
+
+		private AtomicInteger postStartCounter = new AtomicInteger(0);
+
+		
+		public AtomicInteger getPreStartCounter() {
+			return preStartCounter;
+		}
+
+		public AtomicInteger getPostStartCounter() {
+			return postStartCounter;
+		}
+
+		@Override
+		public void preStart(MessageBus bus) {
+			this.preStartCounter.incrementAndGet();
+			assertTrue(!bus.isRunning());
+		}
+
+		@Override
+		public void postStart(MessageBus bus) {
+			this.postStartCounter.incrementAndGet();
+			assertTrue(bus.isRunning());
+		}
+
+	}
+
+	private static class TestMessageBusStopInterceptor extends MessageBusInterceptorAdapter {
+
+		private AtomicInteger preStopCounter = new AtomicInteger(0);
+
+		private AtomicInteger postStopCounter = new AtomicInteger(0);
+
+		
+		public AtomicInteger getPreStopCounter() {
+			return preStopCounter;
+		}
+
+		public AtomicInteger getPostStopCounter() {
+			return postStopCounter;
+		}
+
+		@Override
+		public void preStop(MessageBus bus) {
+			this.preStopCounter.incrementAndGet();
+			assertTrue(bus.isRunning());
+		}
+
+		@Override
+		public void postStop(MessageBus bus) {
+			this.postStopCounter.incrementAndGet();
+			assertTrue(!bus.isRunning());
+		}
+
+	}
+
+}