/*
* Copyright (c) 2011 Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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*/
/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
import java.nio.ByteBuffer;
/**
* Writes all messages in our buffer to the other clients
* and appends new data read from the socket to our buffer
*/
class MessageReader implements DataReader {
private final ChatServer chatServer;
public MessageReader(ChatServer chatServer) {
this.chatServer = chatServer;
}
public boolean acceptsMessages() {
return true;
}
/**
* Write all full messages in our buffer to
* the other clients
*
* @param client the client to read messages from
*/
@Override
public void beforeRead(Client client) {
// Check if we have any messages buffered and send them
String message = client.nextMessage();
while (message != null) {
chatServer.writeMessageToClients(client, message);
message = client.nextMessage();
}
}
/**
* Append the read buffer to the clients message buffer
* @param client the client to append messages to
* @param buffer the buffer we received from the socket
* @param bytes the number of bytes read into the buffer
*/
@Override
public void onData(Client client, ByteBuffer buffer, int bytes) {
buffer.flip();
// Just append the message on the buffer
client.appendMessage(new String(buffer.array(), 0, bytes));
}
}