/*
* Copyright 2007 ETH Zurich
*
* 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 kr.ac.kaist.resl.ltk.net;
import java.net.InetSocketAddress;
import org.apache.log4j.Logger;
import org.apache.mina.core.future.CloseFuture;
import org.apache.mina.core.future.ConnectFuture;
import org.apache.mina.core.service.IoConnector;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.transport.socket.nio.NioSocketConnector;
/**
* LLRPConnector implements a self-initiated LLRP connection.
*
* Here is a simple code example:
* <p>
* <code> LLRPConnector c = new LLRPConnector(endpoint,ip); </code> <p>
* <code> c.connect(); </code> <p>
* <code> // send message asynchronously - response needs to handled via </code> <p>
* <code> // the message received method of the endpoint </code> <p>
* <code> c.send(llrpmessage); </code> <p>
* <code> </code> <p>
* <code> // send message synchronously </code> <p>
* <code> LLRPMessage m = c.transact(llrpmessage); </code>
* <p>
*
* The connect method checks the status of the ConnectionAttemptStatus field in
* in the READER_EVENT_NOTIFICATION message. If the status field is not 'Success",
* an LLRPConnectionAttemptFailedException is thrown.
*/
public class LLRPConnector extends LLRPConnection{
private Logger log = Logger.getLogger(LLRPConnector.class);
private String host;
private int port = 5084;
private NioSocketConnector connector;
private InetSocketAddress remoteAddress;
public LLRPConnector() {
super();
}
/**
* LLRPConnector using parameters provided and LLRPIoAdapterHandlerImpl as default IoHandler
*
*/
public LLRPConnector(LLRPEndpoint endpoint, String host, int port) {
super.endpoint = endpoint;
this.host = host;
this.port = port;
}
/**
* LLRPConnector using parameters provided and LLRPIoAdapterHandlerImpl as default IoHandler
* and default port 5084
*
*/
public LLRPConnector(LLRPEndpoint endpoint, String host) {
super.endpoint = endpoint;
this.host = host;
}
/**
* LLRPConnector using parameters provided and default port 5084
*
*/
public LLRPConnector(LLRPEndpoint endpoint, String host, LLRPIoHandlerAdapter handler) {
super.endpoint = endpoint;
super.handler = handler;
this.host = host;
}
/**
* LLRPConnector using parameters provided
*/
public LLRPConnector(LLRPEndpoint endpoint, String host, int port, LLRPIoHandlerAdapter handler) {
super.endpoint = endpoint;
super.handler = handler;
this.host = host;
this.port = port;
}
/**
* connects to a LLRP device at the host address and port specified. the connect method waits by default
* 10 s for a response. If the READER_NOTIFICATION does not arrive or the ConnectionAttemptEventStatus
* is not set to 'Success', a LLRPConnectionAttemptFailedException is thrown.
*
* @throws LLRPConnectionAttemptFailedException
*
*/
public void connect() throws LLRPConnectionAttemptFailedException{
connect(CONNECT_TIMEOUT);
}
/**
* connects to a LLRP device at the host address and port specified. the connect method waits
* for the timeperiod specified (in ms) for a response. If the READER_NOTIFICATION does not arrive
* or the ConnectionAttemptEventStatus
* is not set to 'Success', a LLRPConnectionAttemptFailedException is thrown.
*
* @param timeout time in ms
* @throws LLRPConnectionAttemptFailedException
*/
public void connect(long timeout) throws LLRPConnectionAttemptFailedException{
connector = new NioSocketConnector();
connector.getFilterChain().addLast("codec", new ProtocolCodecFilter(new LLRPProtocolCodecFactory(LLRPProtocolCodecFactory.BINARY_ENCODING)));
// MINA 2.0 method
connector.setHandler(handler);
remoteAddress = new InetSocketAddress(host, port);
ConnectFuture future = connector.connect(remoteAddress);//.connect(remoteAddress,handler);
future.join();// Wait until the connection attempt is finished.
if(future.isConnected()){
session = future.getSession();
}else{
String msg = "failed to connect";
throw new LLRPConnectionAttemptFailedException(msg);
}
// MINA 2.0
//future.awaitUninterruptibly();
//check if llrp reader reply with a status report to indicate connection success.
//the client shall not send any information to the reader until this status report message is received
checkLLRPConnectionAttemptStatus(timeout);
}
/**
* disconnect existing connection to LLRP device.
*/
public void disconnect(){
//IoSession session = future.getSession();
if (session != null && session.isConnected()){
CloseFuture future = session.close();
// MINA 2.0
// future.awaitUninterruptibly();
}
}
/**
* reconnect to LLRP device using host, port and handler specified.
*
* @return true if connection could be established
* and ConnectionAttemptEvent Status was set to 'Success', set to false otherwise
*
*/
public boolean reconnect() {
ConnectFuture future = connector.connect(remoteAddress);//,handler);
connector.setHandler(handler);
future.join(); // Wait until the connection attempt is finished.
// MINA 2.0
// future = connector.connect();
// future.awaitUninterruptibly();
if(future.isConnected()){
session = future.getSession();
log.info("new session created:" + session);
} else {
return false;
}
//check if llrp reader reply with a status report to indicate connection success.
//the client shall not send any information to the reader until this status report message is received
try {
checkLLRPConnectionAttemptStatus(CONNECT_TIMEOUT);
} catch (LLRPConnectionAttemptFailedException e) {
return false;
}
return true;
}
/**
* get host address of reader device.
*
* @return the host
*/
public String getHost() {
return host;
}
/**
* set host address of reader device.
*
* @param host the host to set
*/
public void setHost(String host) {
this.host = host;
}
/**
* get port on which to connect to reader device.
*
* @return the port
*/
public int getPort() {
return port;
}
/**
* set port on which to connect to reader device.
*
* @param port the port to set
*/
public void setPort(int port) {
this.port = port;
}
}