From c060e68fbce65a080f252fd55a4dba61d578402b Mon Sep 17 00:00:00 2001
From: Mark Fisher <markfisher@vmware.com>
Date: Tue, 19 Aug 2008 02:02:57 +0000
Subject: [PATCH] Added initial implementation of messaging bridge.

---
 .../integration/endpoint/MessagingBridge.java | 41 ++++++++++++
 .../endpoint/MessagingBridgeTests.java        | 66 +++++++++++++++++++
 2 files changed, 107 insertions(+)
 create mode 100644 org.springframework.integration/src/main/java/org/springframework/integration/endpoint/MessagingBridge.java
 create mode 100644 org.springframework.integration/src/test/java/org/springframework/integration/endpoint/MessagingBridgeTests.java

diff --git a/org.springframework.integration/src/main/java/org/springframework/integration/endpoint/MessagingBridge.java b/org.springframework.integration/src/main/java/org/springframework/integration/endpoint/MessagingBridge.java
new file mode 100644
index 0000000000..3172b2bab6
--- /dev/null
+++ b/org.springframework.integration/src/main/java/org/springframework/integration/endpoint/MessagingBridge.java
@@ -0,0 +1,41 @@
+/*
+ * 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.endpoint;
+
+import org.springframework.integration.message.Message;
+
+/**
+ * @author Mark Fisher
+ */
+public class MessagingBridge extends AbstractRequestReplyEndpoint {
+
+	@Override
+	protected Message<?> handleRequestMessage(Message<?> requestMessage) {
+		return requestMessage;
+	}
+
+	@Override
+	protected boolean isValidReplyMessage(Message<?> replyMessage) {
+		return replyMessage != null && replyMessage.getPayload() != null;
+	}
+
+	@Override
+	protected void sendReplyMessage(Message<?> replyMessage, Message<?> requestMessage) {
+		this.getMessageExchangeTemplate().send(replyMessage, this.getTarget());
+	}
+
+}
diff --git a/org.springframework.integration/src/test/java/org/springframework/integration/endpoint/MessagingBridgeTests.java b/org.springframework.integration/src/test/java/org/springframework/integration/endpoint/MessagingBridgeTests.java
new file mode 100644
index 0000000000..51d64b1ce5
--- /dev/null
+++ b/org.springframework.integration/src/test/java/org/springframework/integration/endpoint/MessagingBridgeTests.java
@@ -0,0 +1,66 @@
+/*
+ * 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.endpoint;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import org.junit.Test;
+
+import org.springframework.integration.bus.DefaultMessageBus;
+import org.springframework.integration.dispatcher.PollingDispatcher;
+import org.springframework.integration.message.Message;
+import org.springframework.integration.message.MessageTarget;
+import org.springframework.integration.message.PollableSource;
+import org.springframework.integration.message.StringMessage;
+import org.springframework.integration.scheduling.PollingSchedule;
+
+/**
+ * @author Mark Fisher
+ */
+public class MessagingBridgeTests {
+
+	@Test
+	public void simplePassThrough() throws InterruptedException {
+		final CountDownLatch latch = new CountDownLatch(1);
+		DefaultMessageBus bus = new DefaultMessageBus();
+		MessagingBridge bridge = new MessagingBridge();
+		bridge.setBeanName("bridge");
+		PollableSource<String> source = new PollableSource<String>() {
+			public Message<String> receive() {
+				return new StringMessage("test");
+			}
+		};
+		PollingDispatcher poller = new PollingDispatcher(source, new PollingSchedule(1000));
+		poller.setMaxMessagesPerPoll(1);
+		bridge.setSource(poller);
+		bridge.setTarget(new MessageTarget() {
+			public boolean send(Message<?> message) {
+				latch.countDown();
+				return true;
+			}
+		});
+		bus.registerEndpoint(bridge);
+		bus.start();
+		latch.await(1, TimeUnit.SECONDS);
+		bus.stop();
+		assertEquals(0, latch.getCount());
+	}
+
+}