Polishing

Issue: SPR-14867

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/TransportHandler.java

@@ -44,10 +44,12 @@ public interface TransportHandler {
 	TransportType getTransportType();
 
 	/**
-	 * Whether the type of the given session matches the transport type of this
+	 * Check whether the type of the given session matches the transport type
-	 * {@code TransportHandler} where session id and the transport type are
+	 * of this {@code TransportHandler} where session id and the transport type
-	 * extracted from the SockJS URL.
+	 * are extracted from the SockJS URL.
-	 * @since 4.3.3
+	 * @return {@code true} if the session matches (and would therefore get
+	 * accepted by {@link #handleRequest}), or {@code false} otherwise
+	 * @since 4.3.4
 	 */
 	boolean checkSessionType(SockJsSession session);
 

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/handler/AbstractHttpReceivingTransportHandler.java

@@ -38,6 +38,10 @@ import org.springframework.web.socket.sockjs.transport.session.AbstractHttpSockJ
  */
 public abstract class AbstractHttpReceivingTransportHandler extends AbstractTransportHandler {
 
+	@Override
+	public boolean checkSessionType(SockJsSession session) {
+		return (session instanceof AbstractHttpSockJsSession);
+	}
 
 	@Override
 	public final void handleRequest(ServerHttpRequest request, ServerHttpResponse response,
@@ -95,13 +99,9 @@ public abstract class AbstractHttpReceivingTransportHandler extends AbstractTran
 		}
 	}
 
+
 	protected abstract String[] readMessages(ServerHttpRequest request) throws IOException;
 
 	protected abstract HttpStatus getResponseStatus();
 
-	@Override
-	public boolean checkSessionType(SockJsSession session) {
-		return session instanceof AbstractHttpSockJsSession;
-	}
-
 }

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/handler/AbstractTransportHandler.java

@@ -23,12 +23,14 @@ import org.springframework.web.socket.sockjs.transport.SockJsServiceConfig;
 import org.springframework.web.socket.sockjs.transport.TransportHandler;
 
 /**
+ * Common base class for {@link TransportHandler} inplementations.
+ *
  * @author Rossen Stoyanchev
  * @since 4.0
  */
 public abstract class AbstractTransportHandler implements TransportHandler {
 
-	protected final Log logger = LogFactory.getLog(this.getClass());
+	protected final Log logger = LogFactory.getLog(getClass());
 
 	private SockJsServiceConfig serviceConfig;