Implemented TriggerMessage with an EndpointPoller as its payload for convenience when triggering polling of an endpoint.

org.springframework.integration/src/main/java/org/springframework/integration/endpoint/EndpointTrigger.java

@@ -18,7 +18,6 @@ package org.springframework.integration.endpoint;
 
 import org.springframework.integration.dispatcher.BroadcastingDispatcher;
 import org.springframework.integration.dispatcher.PollingDispatcher;
-import org.springframework.integration.message.GenericMessage;
 import org.springframework.integration.message.Message;
 import org.springframework.integration.message.MessageSource;
 import org.springframework.integration.scheduling.PollingSchedule;
@@ -36,7 +35,7 @@ public class EndpointTrigger extends PollingDispatcher {
 	 * Create an endpoint trigger with the specified {@link Schedule}.
 	 */
 	public EndpointTrigger(Schedule schedule) {
-		super(new EndpointPollerMessageSource(), new BroadcastingDispatcher(), schedule);
+		super(new TriggerSource(), new BroadcastingDispatcher(), schedule);
 	}
 
 	/**
@@ -47,11 +46,19 @@ public class EndpointTrigger extends PollingDispatcher {
 		this(new PollingSchedule(interval));
 	}
 
+	/**
+	 * Create an endpoint trigger that will run one time only when submitted to
+	 * a {@link org.springframework.integration.scheduling.TaskScheduler}.
+	 */
+	public EndpointTrigger() {
+		this(null);
+	}
 
-	private static class EndpointPollerMessageSource implements MessageSource<EndpointPoller> {
+
+	private static class TriggerSource implements MessageSource<EndpointPoller> {
 
 		public Message<EndpointPoller> receive() {
-			return new GenericMessage<EndpointPoller>(new EndpointPoller());
+			return new TriggerMessage();
 		}
 	}
 

org.springframework.integration/src/main/java/org/springframework/integration/endpoint/TriggerMessage.java

@@ -0,0 +1,33 @@
+/*
+ * 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.GenericMessage;
+
+/**
+ * A convenience Message implementation for sending a polling trigger
+ * to an endpoint. 
+ * 
+ * @author Mark Fisher
+ */
+public class TriggerMessage extends GenericMessage<EndpointPoller> {
+
+	public TriggerMessage() {
+		super(new EndpointPoller());
+	}
+
+}

org.springframework.integration/src/test/java/org/springframework/integration/config/EndpointInterceptorTests.java

@@ -21,15 +21,13 @@ import static org.junit.Assert.assertEquals;
 import java.util.List;
 
 import org.junit.Test;
-
 import org.springframework.beans.DirectFieldAccessor;
 import org.springframework.context.support.ClassPathXmlApplicationContext;
 import org.springframework.integration.channel.MessageChannel;
 import org.springframework.integration.endpoint.EndpointInterceptor;
-import org.springframework.integration.endpoint.EndpointPoller;
 import org.springframework.integration.endpoint.MessageEndpoint;
 import org.springframework.integration.endpoint.SourceEndpoint;
-import org.springframework.integration.message.GenericMessage;
+import org.springframework.integration.endpoint.TriggerMessage;
 import org.springframework.integration.message.StringMessage;
 
 /**
@@ -105,7 +103,7 @@ public class EndpointInterceptorTests {
 		if (endpoint instanceof SourceEndpoint) {
 			MessageChannel channel = (MessageChannel) context.getBean("testChannel");
 			channel.send(new StringMessage("foo"));
-			endpoint.send(new GenericMessage<EndpointPoller>(new EndpointPoller()));
+			endpoint.send(new TriggerMessage());
 		}
 		else {
 			endpoint.send(new StringMessage("test"));

org.springframework.integration/src/test/java/org/springframework/integration/endpoint/SourceEndpointTests.java

@@ -40,7 +40,7 @@ public class SourceEndpointTests {
 		SourceEndpoint endpoint = new SourceEndpoint(source);
 		endpoint.setTarget(channel);
 		endpoint.afterPropertiesSet();
-		endpoint.send(new GenericMessage<EndpointPoller>(new EndpointPoller()));
+		endpoint.send(new TriggerMessage());
 		Message<?> message = channel.receive(1000);
 		assertNotNull("message should not be null", message);
 		assertEquals("testing.1", message.getPayload());