/*--- formatted by Jindent 2.1, (www.c-lab.de/~jindent) ---*/
/**
* ***************************************************************
* The LEAP libraries, when combined with certain JADE platform components,
* provide a run-time environment for enabling FIPA agents to execute on
* lightweight devices running Java. LEAP and JADE teams have jointly
* designed the API for ease of integration and hence to take advantage
* of these dual developments and extensions so that users only see
* one development platform and a
* single homogeneous set of APIs. Enabling deployment to a wide range of
* devices whilst still having access to the full development
* environment and functionalities that JADE provides.
* Copyright (C) 2001 Telecom Italia LAB S.p.A.
* Copyright (C) 2001 Motorola.
*
* GNU Lesser General Public License
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation,
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
* **************************************************************
*/
package jade.imtp.leap.JICP;
//#MIDP_EXCLUDE_FILE
import jade.mtp.TransportAddress;
import jade.imtp.leap.*;
import jade.core.CaseInsensitiveString;
import java.io.*;
import jade.util.Logger;
/**
* Class declaration
* @author Giovanni Caire - TILAB
* @author Ronnie Taib - Motorola
* @author Steffen Rusitschka - Siemens
*/
class JICPClient {
private TransportProtocol protocol;
private ConnectionFactory connFactory;
private ConnectionPool pool;
private static Logger log = Logger.getMyLogger(JICPClient.class.getName());
/**
* Constructor declaration
*/
public JICPClient(TransportProtocol tp, ConnectionFactory f, int max) {
protocol = tp;
connFactory = f;
pool = new ConnectionPool(protocol, connFactory, max);
}
/**
* Send a command to this transport address
* @param ta the address to send the command to
* @param dataType the type of data as defined in the JICPPeer
* @param data the command
* @return a byte array corresponding to the answer
*
* @throws ICPException
*/
public byte[] send(TransportAddress ta, byte dataType, byte[] data, boolean requireFreshConnection) throws ICPException {
ConnectionWrapper cw = null;
boolean done = false;
while (true) {
try {
// Acquire a connection wrapper from the pool
cw = pool.acquire(ta, requireFreshConnection);
// Prepare JICP information
byte dataInfo = JICPProtocol.DEFAULT_INFO;
if (cw.isOneShot()) {
dataInfo |= JICPProtocol.TERMINATED_INFO;
}
// Get the actual connection and send the request
Connection connection = cw.getConnection();
JICPPacket request = new JICPPacket(dataType, dataInfo, ta.getFile(), data);
connection.writePacket(request);
// Read the reply
JICPPacket reply = connection.readPacket();
if (reply.getType() == JICPProtocol.ERROR_TYPE) {
throw new ICPException(new String(reply.getData()));
}
if ((reply.getInfo() & JICPProtocol.TERMINATED_INFO) != 0) {
// The server cannot keep the connection open --> set it as one-shot
cw.setOneShot();
}
pool.release(cw);
done = true;
byte[] bb = reply.getData();
if (bb == null) {
throw new ICPException("Null response from server");
}
return bb;
}
catch (EOFException eof) {
if (!cw.isReused()) {
log.log(Logger.SEVERE, "EOF reached", eof);
throw new ICPException("EOF reached");
}
}
catch (IOException ioe) {
if (!cw.isReused()) {
throw new ICPException("I/O error sending/receiving data to "+ta.getHost()+":"+ta.getPort(), ioe);
}
}
catch (ICPException icpe) {
// Re-throw the exception
throw icpe;
}
catch (Exception e) {
throw new ICPException("Problems in communication with "+ta.getHost()+":"+ta.getPort(), e);
}
finally {
if (done) {
if (cw.isOneShot()) {
// Note that a connection can be marked as one-shot due to the fact that the server is not able to keep it open -->
// In this case the connection was inserted in the pool at creation time and must now be removed
pool.remove(cw);
}
}
else {
// Some error occurred --> The connection (if any) is no longer valid
if (cw != null) {
pool.remove(cw);
}
}
}
}
}
public void shutdown() {
pool.shutdown();
}
/**
Called by the JICPPeer ticker at each tick
*/
public void tick(long currentTime) {
pool.clearExpiredConnections(currentTime);
}
}