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/*
Copyright (C) 2011 ApPeAL Group, Politecnico di Torino
This file is part of TraCI4J.
TraCI4J is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
TraCI4J is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with TraCI4J. If not, see <http://www.gnu.org/licenses/>.
*/
package it.polito.appeal.traci.protocol;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.zip.CRC32;
import java.util.zip.Checksum;
import org.apache.log4j.Logger;
import de.uniluebeck.itm.tcpip.Storage;
/**
* Represents a TraCI messages used to send {@link Command}s from the client to
* server (i.e. requests). After construction, the commands are appended one
* after one with {@link #append(Command)}. The whole message, along with its
* length header, can be then retrieved in a serialized form via the
* {@link #writeTo(DataOutputStream)} method.
*
* @author Enrico Gueli <enrico.gueli@polito.it>
* @see <a
* href="https://sourceforge.net/apps/mediawiki/sumo/index.php?title=TraCI/Protocol#Messages">https://sourceforge.net/apps/mediawiki/sumo/index.php?title=TraCI/Protocol#Messages</a>
*/
public class RequestMessage {
private static final Logger log = Logger.getLogger(RequestMessage.class);
private final List<Command> commands = new ArrayList<Command>();
/**
* Adds a command to the tail of this message.
* @param c
* @throws NullPointerException if the command is <code>null</code>.
*/
public void append(Command c) {
if (c == null)
throw new NullPointerException("the command can't be null");
commands.add(c);
}
/**
* Writes the commands to the specified {@link DataOutputStream} object, in
* the same order as the calls of {@link #append(Command)}.
* @param dos
* @throws IOException
*/
public void writeTo(DataOutputStream dos) throws IOException {
int totalLen = Integer.SIZE / 8; // the length header
for (Command cmd : commands) {
totalLen += cmd.rawSize();
}
Checksum checksum = null;
// if (log.isDebugEnabled()) {
// checksum = new CRC32();
// log.debug("sending a message " + totalLen + " bytes long");
//
// }
dos.writeInt(totalLen);
for (Command cmd : commands) {
Storage s = new Storage();
cmd.writeRawTo(s);
writeStorage(s, dos, checksum);
}
// if (log.isDebugEnabled())
// log.debug("message checksum (without len) = " + checksum.getValue());
}
private void writeStorage(Storage storage, OutputStream os, Checksum checksum)
throws IOException {
byte[] buf = new byte[storage.getStorageList().size()];
int n = 0;
for (Byte b : storage.getStorageList()) {
if (checksum != null)
checksum.update(b);
buf[n] = b;
n++;
}
os.write(buf);
}
public List<Command> commands() {
return Collections.unmodifiableList(commands);
}
}
=======
/*
Copyright (C) 2011 ApPeAL Group, Politecnico di Torino
This file is part of TraCI4J.
TraCI4J is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
TraCI4J is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with TraCI4J. If not, see <http://www.gnu.org/licenses/>.
*/
package it.polito.appeal.traci.protocol;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.zip.CRC32;
import java.util.zip.Checksum;
import org.apache.log4j.Logger;
import de.uniluebeck.itm.tcpip.Storage;
/**
* Represents a TraCI messages used to send {@link Command}s from the client to
* server (i.e. requests). After construction, the commands are appended one
* after one with {@link #append(Command)}. The whole message, along with its
* length header, can be then retrieved in a serialized form via the
* {@link #writeTo(DataOutputStream)} method.
*
* @author Enrico Gueli <enrico.gueli@polito.it>
* @see <a
* href="https://sourceforge.net/apps/mediawiki/sumo/index.php?title=TraCI/Protocol#Messages">https://sourceforge.net/apps/mediawiki/sumo/index.php?title=TraCI/Protocol#Messages</a>
*/
public class RequestMessage {
private static final Logger log = Logger.getLogger(RequestMessage.class);
private final List<Command> commands = new ArrayList<Command>();
/**
* Adds a command to the tail of this message.
* @param c
* @throws NullPointerException if the command is <code>null</code>.
*/
public void append(Command c) {
if (c == null)
throw new NullPointerException("the command can't be null");
commands.add(c);
}
/**
* Writes the commands to the specified {@link DataOutputStream} object, in
* the same order as the calls of {@link #append(Command)}.
* @param dos
* @throws IOException
*/
public void writeTo(DataOutputStream dos) throws IOException {
int totalLen = Integer.SIZE / 8; // the length header
for (Command cmd : commands) {
totalLen += cmd.rawSize();
}
Checksum checksum = null;
// if (log.isDebugEnabled()) {
// checksum = new CRC32();
// log.debug("sending a message " + totalLen + " bytes long");
//
// }
dos.writeInt(totalLen);
for (Command cmd : commands) {
Storage s = new Storage();
cmd.writeRawTo(s);
writeStorage(s, dos, checksum);
}
// if (log.isDebugEnabled())
// log.debug("message checksum (without len) = " + checksum.getValue());
}
private void writeStorage(Storage storage, OutputStream os, Checksum checksum)
throws IOException {
byte[] buf = new byte[storage.getStorageList().size()];
int n = 0;
for (Byte b : storage.getStorageList()) {
if (checksum != null)
checksum.update(b);
buf[n] = b;
n++;
}
os.write(buf);
}
public List<Command> commands() {
return Collections.unmodifiableList(commands);
}
}
>>>>>>> origin/abdalla