summaryrefslogtreecommitdiffstats
path: root/simple/simple-http/src/main/java/org/simpleframework/http/socket/FrameChannel.java
diff options
context:
space:
mode:
Diffstat (limited to 'simple/simple-http/src/main/java/org/simpleframework/http/socket/FrameChannel.java')
-rw-r--r--simple/simple-http/src/main/java/org/simpleframework/http/socket/FrameChannel.java117
1 files changed, 117 insertions, 0 deletions
diff --git a/simple/simple-http/src/main/java/org/simpleframework/http/socket/FrameChannel.java b/simple/simple-http/src/main/java/org/simpleframework/http/socket/FrameChannel.java
new file mode 100644
index 0000000..bcacc43
--- /dev/null
+++ b/simple/simple-http/src/main/java/org/simpleframework/http/socket/FrameChannel.java
@@ -0,0 +1,117 @@
+/*
+ * FrameChannel.java February 2014
+ *
+ * Copyright (C) 2014, Niall Gallagher <niallg@users.sf.net>
+ *
+ * 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.simpleframework.http.socket;
+
+import java.io.IOException;
+
+/**
+ * The <code>FrameChannel</code> represents a full duplex communication
+ * channel as defined by RFC 6455. Any instance of this will provide
+ * a means to perform asynchronous writes and reads to a remote client
+ * using a lightweight framing protocol. A frame is a finite length
+ * sequence of bytes that can hold either text or binary data. Also,
+ * control frames are used to perform heartbeat monitoring and closure.
+ * <p>
+ * For convenience frames can be consumed from the socket via a
+ * callback to a registered listener. This avoids having to poll each
+ * socket for data and provides a asynchronous event driven model of
+ * communication, which greatly reduces overhead and complication.
+ *
+ * @author Niall Gallagher
+ *
+ * @see org.simpleframework.http.socket.FrameListener
+ * @see org.simpleframework.http.socket.Frame
+ */
+public interface FrameChannel {
+
+ /**
+ * This is used to send data to the connected client. To prevent
+ * an application code from causing resource issues this will block
+ * as soon as a configured linked list of mapped memory buffers has
+ * been exhausted. Caution should be taken when writing a broadcast
+ * implementation that can write to multiple sockets as a badly
+ * behaving socket that has filled its output buffering capacity
+ * can cause congestion.
+ *
+ * @param data this is the data that is to be sent
+ */
+ void send(byte[] data) throws IOException;
+
+ /**
+ * This is used to send text to the connected client. To prevent
+ * an application code from causing resource issues this will block
+ * as soon as a configured linked list of mapped memory buffers has
+ * been exhausted. Caution should be taken when writing a broadcast
+ * implementation that can write to multiple sockets as a badly
+ * behaving socket that has filled its output buffering capacity
+ * can cause congestion.
+ *
+ * @param text this is the text that is to be sent
+ */
+ void send(String text) throws IOException;
+
+ /**
+ * This is used to send data to the connected client. To prevent
+ * an application code from causing resource issues this will block
+ * as soon as a configured linked list of mapped memory buffers has
+ * been exhausted. Caution should be taken when writing a broadcast
+ * implementation that can write to multiple sockets as a badly
+ * behaving socket that has filled its output buffering capacity
+ * can cause congestion.
+ *
+ * @param frame this is the frame that is to be sent
+ */
+ void send(Frame frame) throws IOException;
+
+ /**
+ * This is used to register a <code>FrameListener</code> to this
+ * instance. The registered listener will receive all user frames
+ * and control frames sent from the client. Also, when the frame
+ * is closed or when an unexpected error occurs the listener is
+ * notified. Any number of listeners can be registered at any time.
+ *
+ * @param listener this is the listener that is to be registered
+ */
+ void register(FrameListener listener) throws IOException;
+
+ /**
+ * This is used to remove a <code>FrameListener</code> from this
+ * instance. After removal the listener will no longer receive
+ * any user frames or control messages from this specific instance.
+ *
+ * @param listener this is the listener to be removed
+ */
+ void remove(FrameListener listener) throws IOException;
+
+ /**
+ * This is used to close the connection with a specific reason.
+ * The close reason will be sent as a control frame before the
+ * TCP connection is terminated.
+ *
+ * @param reason the reason for closing the connection
+ */
+ void close(Reason reason) throws IOException;
+
+ /**
+ * This is used to close the connection without a specific reason.
+ * The close reason will be sent as a control frame before the
+ * TCP connection is terminated.
+ */
+ void close() throws IOException;
+}