/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.nio.ascii;
import com.hazelcast.ascii.CommandParser;
import com.hazelcast.ascii.TextCommand;
import com.hazelcast.ascii.TextCommandConstants;
import com.hazelcast.ascii.TextCommandService;
import com.hazelcast.ascii.memcache.*;
import com.hazelcast.ascii.rest.HttpCommand;
import com.hazelcast.ascii.rest.HttpDeleteCommandParser;
import com.hazelcast.ascii.rest.HttpGetCommandParser;
import com.hazelcast.ascii.rest.HttpPostCommandParser;
import com.hazelcast.logging.ILogger;
import com.hazelcast.nio.ConnectionType;
import com.hazelcast.nio.IOService;
import com.hazelcast.nio.SocketReader;
import com.hazelcast.nio.TcpIpConnection;
import com.hazelcast.util.StringUtil;
import java.nio.ByteBuffer;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import static com.hazelcast.ascii.TextCommandConstants.TextCommandType.*;
public class SocketTextReader implements TextCommandConstants, SocketReader {
private final static Map<String, CommandParser> mapCommandParsers = new HashMap<String, CommandParser>();
static {
mapCommandParsers.put("get", new GetCommandParser());
mapCommandParsers.put("gets", new GetCommandParser());
mapCommandParsers.put("set", new SetCommandParser(SET));
mapCommandParsers.put("add", new SetCommandParser(ADD));
mapCommandParsers.put("replace", new SetCommandParser(REPLACE));
mapCommandParsers.put("append", new SetCommandParser(APPEND));
mapCommandParsers.put("prepend", new SetCommandParser(PREPEND));
mapCommandParsers.put("touch", new TouchCommandParser(TOUCH));
mapCommandParsers.put("incr", new IncrementCommandParser(INCREMENT));
mapCommandParsers.put("decr", new IncrementCommandParser(DECREMENT));
mapCommandParsers.put("delete", new DeleteCommandParser());
mapCommandParsers.put("quit", new SimpleCommandParser(QUIT));
mapCommandParsers.put("stats", new SimpleCommandParser(STATS));
mapCommandParsers.put("version", new SimpleCommandParser(VERSION));
mapCommandParsers.put("GET", new HttpGetCommandParser());
mapCommandParsers.put("POST", new HttpPostCommandParser());
mapCommandParsers.put("PUT", new HttpPostCommandParser());
mapCommandParsers.put("DELETE", new HttpDeleteCommandParser());
}
private ByteBuffer commandLine = ByteBuffer.allocate(500);
private boolean commandLineRead = false;
private TextCommand command = null;
private final TextCommandService textCommandService;
private final SocketTextWriter socketTextWriter;
private final TcpIpConnection connection;
private final boolean restEnabled;
private final boolean memcacheEnabled;
private boolean connectionTypeSet = false;
private long requestIdGen;
private final ILogger logger;
public SocketTextReader(TcpIpConnection connection) {
IOService ioService = connection.getConnectionManager().getIOHandler();
this.textCommandService = ioService.getTextCommandService();
this.socketTextWriter = (SocketTextWriter) connection.getWriteHandler().getSocketWriter();
this.connection = connection;
this.memcacheEnabled = ioService.isMemcacheEnabled();
this.restEnabled = ioService.isRestEnabled();
this.logger = ioService.getLogger(this.getClass().getName());
}
public void sendResponse(TextCommand command) {
socketTextWriter.enqueue(command);
}
public void read(ByteBuffer inBuffer) {
while (inBuffer.hasRemaining()) {
doRead(inBuffer);
}
}
private void doRead(ByteBuffer bb) {
while (!commandLineRead && bb.hasRemaining()) {
byte b = bb.get();
char c = (char) b;
if (c == '\n') {
commandLineRead = true;
} else if (c != '\r') {
commandLine.put(b);
}
}
if (commandLineRead) {
if (command == null) {
processCmd(toStringAndClear(commandLine));
}
if (command != null) {
boolean complete = command.readFrom(bb);
if (complete) {
publishRequest(command);
reset();
}
} else {
reset();
}
}
}
void reset() {
command = null;
commandLine.clear();
commandLineRead = false;
}
public static String toStringAndClear(ByteBuffer bb) {
if (bb == null) return "";
String result;
if (bb.position() == 0) {
result = "";
} else {
result = StringUtil.bytesToString(bb.array(), 0, bb.position());
}
bb.clear();
return result;
}
public void publishRequest(TextCommand command) {
if (!connectionTypeSet) {
if (command instanceof HttpCommand) {
if (!restEnabled) {
connection.close();
}
connection.setType(ConnectionType.REST_CLIENT);
} else {
if (!memcacheEnabled) {
connection.close();
}
connection.setType(ConnectionType.MEMCACHE_CLIENT);
}
connectionTypeSet = true;
}
long requestId = (command.shouldReply()) ? requestIdGen++ : -1;
command.init(this, requestId);
textCommandService.processRequest(command);
}
void processCmd(String cmd) {
try {
int space = cmd.indexOf(' ');
String operation = (space == -1) ? cmd : cmd.substring(0, space);
CommandParser commandParser = mapCommandParsers.get(operation);
if (commandParser != null) {
command = commandParser.parser(this, cmd, space);
} else {
command = new ErrorCommand(UNKNOWN);
}
} catch (Throwable t) {
logger.finest(t);
command = new ErrorCommand(ERROR_CLIENT, "Invalid command : " + cmd);
}
}
public SocketTextWriter getSocketTextWriter() {
return socketTextWriter;
}
public void closeConnection() {
connection.close();
}
}