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//========================================================================
//$Id: EndPoint.java,v 1.1 2005/10/05 14:09:25 janb Exp $
//Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
//------------------------------------------------------------------------
//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.mortbay.io;
import java.io.IOException;
/**
* @author gregw
* A transport EndPoint
*/
public interface EndPoint
{
/**
* Close any backing stream associated with the buffer
*/
void close() throws IOException;
/**
* Fill the buffer from the current putIndex to it's capacity from whatever
* byte source is backing the buffer. The putIndex is increased if bytes filled.
* The buffer may chose to do a compact before filling.
* @return an int value indicating the number of bytes
* filled or -1 if EOF is reached.
*/
int fill(Buffer buffer) throws IOException;
/**
* Flush the buffer from the current getIndex to it's putIndex using whatever byte
* sink is backing the buffer. The getIndex is updated with the number of bytes flushed.
* Any mark set is cleared.
* If the entire contents of the buffer are flushed, then an implicit empty() is done.
*
* @param buffer The buffer to flush. This buffers getIndex is updated.
* @return the number of bytes written
*/
int flush(Buffer buffer) throws IOException;
/**
* Flush the buffer from the current getIndex to it's putIndex using whatever byte
* sink is backing the buffer. The getIndex is updated with the number of bytes flushed.
* Any mark set is cleared.
* If the entire contents of the buffer are flushed, then an implicit empty() is done.
* The passed header/trailer buffers are written before/after the contents of this buffer. This may be done
* either as gather writes, as a poke into this buffer or as several writes. The implementation is free to
* select the optimal mechanism.
* @param header A buffer to write before flushing this buffer. This buffers getIndex is updated.
* @param buffer The buffer to flush. This buffers getIndex is updated.
* @param trailer A buffer to write after flushing this buffer. This buffers getIndex is updated.
* @return the total number of bytes written.
*/
int flush(Buffer header, Buffer buffer, Buffer trailer) throws IOException;
/* ------------------------------------------------------------ */
/**
* @return The local IP address to which this EndPoint is bound, or null
* if this EndPoint does not represent a network connection.
*/
public String getLocalAddr();
/* ------------------------------------------------------------ */
/**
* @return The local host name to which this EndPoint is bound, or null
* if this EndPoint does not represent a network connection.
*/
public String getLocalHost();
/* ------------------------------------------------------------ */
/**
* @return The local port number on which this EndPoint is listening, or 0
* if this EndPoint does not represent a network connection.
*/
public int getLocalPort();
/* ------------------------------------------------------------ */
/**
* @return The remote IP address to which this EndPoint is connected, or null
* if this EndPoint does not represent a network connection.
*/
public String getRemoteAddr();
/* ------------------------------------------------------------ */
/**
* @return The host name of the remote machine to which this EndPoint is connected, or null
* if this EndPoint does not represent a network connection.
*/
public String getRemoteHost();
/* ------------------------------------------------------------ */
/**
* @return The remote port number to which this EndPoint is connected, or 0
* if this EndPoint does not represent a network connection.
*/
public int getRemotePort();
/* ------------------------------------------------------------ */
public boolean isBlocking();
/* ------------------------------------------------------------ */
public boolean isBufferred();
/* ------------------------------------------------------------ */
public boolean blockReadable(long millisecs) throws IOException;
/* ------------------------------------------------------------ */
public boolean blockWritable(long millisecs) throws IOException;
/* ------------------------------------------------------------ */
public boolean isOpen();
/* ------------------------------------------------------------ */
/**
* @return The underlying transport object (socket, channel, etc.)
*/
public Object getTransport();
/* ------------------------------------------------------------ */
/**
* @return True if the endpoint has some buffered input data
*/
public boolean isBufferingInput();
/* ------------------------------------------------------------ */
/**
* @return True if the endpoint has some buffered output data
*/
public boolean isBufferingOutput();
/* ------------------------------------------------------------ */
/** Flush any buffered output.
* May fail to write all data if endpoint is non-blocking
* @throws IOException
*/
public void flush() throws IOException;
}