TargetEndpoint now returns false when one of its MessageSelectors rejects a Message rather than throwing an Exception. Added Source, BlockingSource, and BlockingTarget interfaces. MessageChannel now extends BlockingSource and BlockingTarget.

spring-integration-adapters/src/main/java/org/springframework/integration/adapter/file/FileSource.java

@@ -84,7 +84,7 @@ public class FileSource implements PollableSource<Object>, InitializingBean {
 		}
 	}
 
-	public Message poll() {
+	public Message receive() {
 		File[] files = null;
 		if (this.fileFilter != null) {
 			files = this.directory.listFiles(this.fileFilter);

spring-integration-adapters/src/main/java/org/springframework/integration/adapter/ftp/FtpSource.java

@@ -120,7 +120,7 @@ public class FtpSource implements PollableSource<Object>, MessageDeliveryAware {
 		}
 	}
 
-	public final Message poll() {
+	public final Message receive() {
 		try {
 			this.establishConnection();
 			FTPFile[] fileList = this.client.listFiles();

spring-integration-adapters/src/main/java/org/springframework/integration/adapter/jms/JmsPollableSource.java

@@ -47,7 +47,7 @@ public class JmsPollableSource extends AbstractJmsTemplateBasedAdapter implement
 	}
 
 
-	public Message<Object> poll() {
+	public Message<Object> receive() {
 		Object receivedObject = this.getJmsTemplate().receiveAndConvert();
 		if (receivedObject == null) {
 			return null;

spring-integration-adapters/src/main/java/org/springframework/integration/adapter/stream/ByteStreamSource.java

@@ -67,7 +67,7 @@ public class ByteStreamSource implements PollableSource<byte[]> {
 		this.shouldTruncate = shouldTruncate;
 	}
 
-	public Message<byte[]> poll() {
+	public Message<byte[]> receive() {
 		try {
 			byte[] bytes;
 			int bytesRead = 0;

spring-integration-adapters/src/main/java/org/springframework/integration/adapter/stream/CharacterStreamSource.java

@@ -58,7 +58,7 @@ public class CharacterStreamSource implements PollableSource<String> {
 	}
 
 
-	public StringMessage poll() {
+	public StringMessage receive() {
 		try {
 			synchronized (this.monitor) {
 				if (!this.reader.ready()) {