Added timestamp and methods to retrieve attribute and property names.

spring-integration-core/src/main/java/org/springframework/integration/message/MessageHeader.java

@@ -17,8 +17,10 @@
 package org.springframework.integration.message;
 
 import java.util.Date;
+import java.util.HashSet;
 import java.util.Map;
 import java.util.Properties;
+import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 
 /**
@@ -36,6 +38,8 @@ public class MessageHeader {
 
 	private String replyChannelName;
 
+	private Date timestamp = new Date();
+
 	private Date expiration;
 
 	private int sequenceNumber = 1;
@@ -67,6 +71,10 @@ public class MessageHeader {
 		return this.sequenceNumber;
 	}
 
+	public Date getTimestamp() {
+		return this.timestamp;
+	}
+
 	/**
 	 * Set the expiration date for this message or <code>null</code> to
 	 * indicate 'never expire'. The default is <code>null</code>.
@@ -103,6 +111,14 @@ public class MessageHeader {
 		this.properties.setProperty(key, value);
 	}
 
+	public Set<String> getPropertyNames() {
+		Set<String> propertyNames = new HashSet<String>();
+		for (Object key : this.properties.keySet()) {
+			propertyNames.add((String) key);
+		}
+		return propertyNames; 
+	}
+
 	public Object getAttribute(String key) {
 		return this.attributes.get(key);
 	}
@@ -111,4 +127,8 @@ public class MessageHeader {
 		this.attributes.put(key, value);
 	}
 
+	public Set<String> getAttributeNames() {
+		return this.attributes.keySet();
+	}
+
 }

spring-integration-core/src/test/java/org/springframework/integration/message/MessageHeaderTests.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2002-2007 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.message;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Set;
+
+import org.junit.Test;
+
+/**
+ * @author Mark Fisher
+ */
+public class MessageHeaderTests {
+
+	@Test
+	public void testTimestamp() {
+		MessageHeader header = new MessageHeader();
+		assertNotNull(header.getTimestamp());
+	}
+
+	@Test
+	public void testAttributes() {
+		MessageHeader header = new MessageHeader();
+		Integer integer = new Integer(123);
+		header.setAttribute("test", integer);
+		assertEquals(integer, header.getAttribute("test"));
+		assertNull(header.getAttribute("nosuchattribute"));
+		Set<String> names = header.getAttributeNames();
+		assertEquals(1, names.size());
+		assertTrue(names.contains("test"));
+	}
+
+	@Test
+	public void testProperties() {
+		MessageHeader header = new MessageHeader();
+		header.setProperty("foo", "bar");
+		assertEquals("bar", header.getProperty("foo"));
+		assertNull(header.getProperty("nosuchproperty"));
+		Set<String> names = header.getPropertyNames();
+		assertEquals(1, names.size());
+		assertTrue(names.contains("foo"));
+	}
+
+}