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Client for SwiftMQ Messaging System with JMS, AMQP 1.0 and file transfer over JMS.
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/*
* Copyright 2019 IIT Software GmbH
*
* IIT Software GmbH licenses this file to You 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.swiftmq.amqp.v100.client;
import com.swiftmq.amqp.AMQPContext;
import com.swiftmq.amqp.OutboundHandler;
import com.swiftmq.amqp.ProtocolHeader;
import com.swiftmq.amqp.integration.Tracer;
import com.swiftmq.amqp.v100.client.po.*;
import com.swiftmq.amqp.v100.generated.FrameReader;
import com.swiftmq.amqp.v100.generated.security.sasl.*;
import com.swiftmq.amqp.v100.generated.transport.definitions.ConnectionError;
import com.swiftmq.amqp.v100.generated.transport.definitions.ErrorConditionFactory;
import com.swiftmq.amqp.v100.generated.transport.definitions.Milliseconds;
import com.swiftmq.amqp.v100.generated.transport.performatives.*;
import com.swiftmq.amqp.v100.transport.AMQPFrame;
import com.swiftmq.amqp.v100.transport.HeartbeatFrame;
import com.swiftmq.amqp.v100.types.*;
import com.swiftmq.net.client.InboundHandler;
import com.swiftmq.net.protocol.amqp.AMQPInputHandler;
import com.swiftmq.tools.concurrent.Semaphore;
import com.swiftmq.tools.pipeline.POObject;
import com.swiftmq.tools.pipeline.PipelineQueue;
import com.swiftmq.tools.timer.TimerEvent;
import com.swiftmq.tools.timer.TimerListener;
import com.swiftmq.tools.timer.TimerRegistry;
import com.swiftmq.tools.util.LengthCaptureDataInput;
import javax.security.auth.callback.*;
import javax.security.sasl.RealmCallback;
import javax.security.sasl.Sasl;
import javax.security.sasl.SaslClient;
import javax.security.sasl.SaslException;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class ConnectionDispatcher
implements ConnectionVisitor, InboundHandler {
static final HeartbeatFrame HEARTBEAT_FRAME = new HeartbeatFrame(0);
AMQPContext ctx = null;
Tracer fTracer = null;
Tracer pTracer = null;
com.swiftmq.amqp.v100.client.Connection myConnection = null;
String remoteHostname = null;
String localHostname = null;
OutboundHandler outboundHandler = null;
PipelineQueue pipelineQueue = null;
DispatchVisitor dispatchVisitor = new DispatchVisitor();
ConnectionVisitor connectionVisitor = new ConnectionVisitor();
AMQPInputHandler protocolHandler = new AMQPInputHandler();
volatile boolean closed = false;
volatile boolean closeInProgress = false;
Lock closeLock = new ReentrantLock();
volatile boolean awaitProtocolHeader = true;
ProtocolHeader localProt = null;
ProtocolHeader remoteProt = null;
POProtocolRequest protPO = null;
POAuthenticate authPO = null;
POOpen openPO = null;
OpenFrame remoteOpen = null;
POSendClose closePO = null;
CloseFrame remoteClose = null;
SaslMechanismsFrame saslMechanisms = null;
boolean saslActive = false;
volatile long lastActivity = System.currentTimeMillis();
long myIdleTimeout = -1;
TimerListener heartBeatSender = null;
long heartBeatDelay = 0;
TimerListener idleTimeoutChecker = null;
long idleTimeoutDelay = 0;
SaslClient saslClient = null;
volatile boolean connectionDisabled = false;
int maxLocalFrameSize = Integer.MAX_VALUE;
int maxRemoteFrameSize = Integer.MAX_VALUE;
public ConnectionDispatcher(AMQPContext ctx, String remoteHostname) {
this.ctx = ctx;
this.remoteHostname = remoteHostname;
fTracer = ctx.getFrameTracer();
pTracer = ctx.getProcessingTracer();
try {
localHostname = InetAddress.getLocalHost().getHostName();
} catch (UnknownHostException e) {
localHostname = "unknown";
}
pipelineQueue = new PipelineQueue(ctx.getConnectionPool(), "ConnectionDispatcher", this);
}
private static boolean hasValue(AMQPType[] t, String value)
throws IOException {
for (int i = 0; i < t.length; i++) {
if (((AMQPSymbol) t[i]).getValue().equalsIgnoreCase(value)) {
return true;
}
}
return false;
}
public AMQPInputHandler getProtocolHandler() {
return protocolHandler;
}
public void setMyConnection(Connection myConnection) {
this.myConnection = myConnection;
}
public void setOutboundHandler(OutboundHandler outboundHandler) {
this.outboundHandler = outboundHandler;
}
public int getMaxFrameSize() {
// smallest size of local/remote size but at least 512
return Math.max(512, Math.min(maxLocalFrameSize, maxRemoteFrameSize));
}
public void setSaslActive(boolean saslActive) {
this.saslActive = saslActive;
}
private void checkCompatibility() {
if (localProt != null && remoteProt != null) {
if (!localProt.equals(remoteProt)) {
protPO.setSuccess(false);
protPO.setException("Incompatible AMQP protocols. Local=" + localProt + ", remote=" + remoteProt);
} else
protPO.setSuccess(true);
localProt = null;
remoteProt = null;
if (protPO != null)
protPO.getSemaphore().notifySingleWaiter();
protPO = null;
}
}
private void checkStartSaslInit() {
if (authPO != null && saslMechanisms != null) {
AMQPArray mechanisms = saslMechanisms.getSaslServerMechanisms();
if (mechanisms != null) {
try {
AMQPType[] t = mechanisms.getValue();
if (authPO.getUsername() != null && authPO.getPassword() != null) {
if (hasValue(t, authPO.getMechanism())) {
saslClient = Sasl.createSaslClient(new String[]{authPO.getMechanism()},
null, "amqp", remoteHostname, null, new CBHandler(authPO.getUsername(), authPO.getPassword()));
byte[] response = (saslClient.hasInitialResponse() ? saslClient.evaluateChallenge(new byte[0]) : null);
SaslInitFrame initFrame = new SaslInitFrame(0);
initFrame.setMechanism(new AMQPSymbol(authPO.getMechanism()));
initFrame.setHostname(new AMQPString(myConnection.hostname));
if (response != null)
initFrame.setInitialResponse(new AMQPBinary(response));
outboundHandler.send(initFrame);
saslMechanisms = null;
} else {
authPO.setSuccess(false);
authPO.setException("Server doesn't support security mechanisms '" + authPO.getMechanism() + "'");
authPO.getSemaphore().notifySingleWaiter();
authPO = null;
}
saslMechanisms = null;
} else {
if (hasValue(t, "ANONYMOUS")) {
SaslInitFrame initFrame = new SaslInitFrame(0);
initFrame.setMechanism(new AMQPSymbol("ANONYMOUS"));
initFrame.setHostname(new AMQPString(localHostname));
outboundHandler.send(initFrame);
saslMechanisms = null;
} else {
authPO.setSuccess(false);
authPO.setException("Remote server doesn't support ANONYMOUS login");
authPO.getSemaphore().notifySingleWaiter();
authPO = null;
saslMechanisms = null;
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
private void checkBothSidesOpen() {
if (openPO != null && remoteOpen != null) {
openPO.setSuccess(true);
openPO.getSemaphore().notifySingleWaiter();
openPO = null;
}
}
private void checkBothSidesClosed() {
if (closePO != null && remoteClose != null) {
closePO.setSuccess(true);
closePO.getSemaphore().notifySingleWaiter();
closePO = null;
remoteClose = null;
}
}
private void notifyWaitingPOs(POObject[] po) {
for (POObject poObject : po) {
if (poObject != null) {
poObject.setSuccess(false);
if (poObject.getException() == null)
poObject.setException("Connection was asynchronously closed");
poObject.getSemaphore().notifySingleWaiter();
}
}
}
private void dispatchSession(int remoteChannel, POObject po) {
Session session = myConnection.getSessionForRemoteChannel(remoteChannel);
if (session != null)
session.dispatch(po);
else if (pTracer.isEnabled())
pTracer.trace(toString(), ", invalid channel (no associated session): " + remoteChannel);
}
public void dispatch(POObject po) {
pipelineQueue.enqueue(po);
}
public void dataAvailable(LengthCaptureDataInput in) {
try {
if (connectionDisabled) {
if (fTracer.isEnabled()) fTracer.trace(toString(), "Connection is disabled, ignore inbound traffic");
return;
}
lastActivity = System.currentTimeMillis();
if (awaitProtocolHeader) {
ProtocolHeader header = new ProtocolHeader();
header.readContent(in);
awaitProtocolHeader = false;
protocolHandler.setProtHeaderExpected(false);
if (fTracer.isEnabled()) fTracer.trace("amqp", "RCV: " + header);
dispatch(new POProtocolResponse(header));
} else {
if (saslActive) {
SaslFrameIF frame = FrameReader.createSaslFrame(in);
int size = frame.getPredictedSize();
if (size > maxLocalFrameSize) {
if (fTracer.isEnabled())
fTracer.trace(toString(), ", dataAvailable, Frame size (" + size + ") > max frame size (" + maxLocalFrameSize + ")");
connectionDisabled = true;
new Disconnecter(ConnectionError.FRAMING_ERROR.getValue(), "Frame size (" + size + ") > max frame size (" + maxLocalFrameSize + ")").start();
} else {
if (fTracer.isEnabled())
fTracer.trace("amqp", "RCV[" + ((AMQPFrame) frame).getChannel() + "] (size=" + size + "): " + frame);
frame.accept(dispatchVisitor);
}
} else {
FrameIF frame = FrameReader.createFrame(in);
int size = frame.getPredictedSize();
if (size > maxLocalFrameSize) {
if (fTracer.isEnabled())
fTracer.trace(toString(), ", dataAvailable, Frame size (" + size + ") > max frame size (" + maxLocalFrameSize + ")");
connectionDisabled = true;
new Disconnecter(ConnectionError.FRAMING_ERROR.getValue(), "Frame size (" + size + ") > max frame size (" + maxLocalFrameSize + ")").start();
} else {
if (fTracer.isEnabled())
fTracer.trace("amqp", "RCV[" + ((AMQPFrame) frame).getChannel() + "] (size=" + size + "): " + frame + (((AMQPFrame) frame).getPayload() != null ? " | payload size=" + ((AMQPFrame) frame).getPayload().length : ""));
frame.accept(dispatchVisitor);
}
}
}
} catch (Exception e) {
new Disconnecter(ConnectionError.FRAMING_ERROR.getValue(), e.toString()).start();
}
}
public void visit(POProtocolRequest po) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " ...");
localProt = po.getHeader();
protPO = po;
outboundHandler.send(localProt);
checkCompatibility();
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " done");
}
public void visit(POProtocolResponse po) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " ...");
remoteProt = po.getHeader();
checkCompatibility();
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " done");
}
public void visit(POAuthenticate po) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " ...");
authPO = po;
checkStartSaslInit();
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " done");
}
public void visit(POOpen po) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " ...");
openPO = po;
try {
OpenFrame openFrame = new OpenFrame(0);
openFrame.setContainerId(new AMQPString(po.getContainerId()));
openFrame.setChannelMax(new AMQPUnsignedShort(po.getMaxChannel()));
if (myConnection.getOpenHostname() == null)
openFrame.setHostname(new AMQPString(remoteHostname));
else
openFrame.setHostname(new AMQPString(myConnection.getOpenHostname()));
maxLocalFrameSize = po.getMaxFrameSize() > Integer.MAX_VALUE ? Integer.MAX_VALUE : (int) po.getMaxFrameSize();
openFrame.setMaxFrameSize(new AMQPUnsignedInt(maxLocalFrameSize));
myIdleTimeout = po.getIdleTimeout();
if (myIdleTimeout > 0) {
openFrame.setIdleTimeOut(new Milliseconds(myIdleTimeout));
idleTimeoutDelay = po.getIdleTimeout() / 2;
idleTimeoutChecker = new TimerListener() {
public void performTimeAction(TimerEvent evt) {
dispatch(new POCheckIdleTimeout(null));
}
};
TimerRegistry.Singleton().addTimerListener(idleTimeoutDelay, idleTimeoutChecker);
}
outboundHandler.send(openFrame);
} catch (Exception e) {
e.printStackTrace();
}
checkBothSidesOpen();
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " done");
}
public void visit(POConnectionFrameReceived po) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " ...");
if (po.isSasl())
((SaslFrameIF) po.getFrame()).accept(connectionVisitor);
else
((FrameIF) po.getFrame()).accept(connectionVisitor);
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " done");
}
public void visit(POSendHeartBeat po) {
if (pTracer.isEnabled())
pTracer.trace(toString(), ", visit, po=" + po + " ...");
outboundHandler.send(HEARTBEAT_FRAME);
if (pTracer.isEnabled())
pTracer.trace(toString(), ", visit, po=" + po + " done");
}
public void visit(POCheckIdleTimeout po) {
if (pTracer.isEnabled())
pTracer.trace(toString(), ", visit, po=" + po + " ...");
long to = lastActivity + myIdleTimeout;
if (System.currentTimeMillis() > to) {
pTracer.trace(toString(), ", idleTimeout reached (" + myIdleTimeout + " ms). Closing connection!");
new Disconnecter(ConnectionError.CONNECTION_FORCED.getValue(), "IdleTimeout reached (" + myIdleTimeout + " ms). Closing connection!").start();
}
if (pTracer.isEnabled())
pTracer.trace(toString(), ", visit, po=" + po + " done");
}
public void visit(POSendClose po) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " ...");
if (po.getSemaphore() != null)
closePO = po;
try {
CloseFrame closeFrame = new CloseFrame(0);
if (po.getCondition() != null) {
com.swiftmq.amqp.v100.generated.transport.definitions.Error error = new com.swiftmq.amqp.v100.generated.transport.definitions.Error();
error.setCondition(ErrorConditionFactory.create(po.getCondition()));
if (po.getDescription() != null)
error.setDescription(po.getDescription());
closeFrame.setError(error);
}
Semaphore sem = new Semaphore();
closeFrame.setSemaphore(sem);
outboundHandler.send(closeFrame);
sem.waitHere();
} catch (Exception e) {
if (po.getSemaphore() != null) {
po.setException(e.toString());
po.setSuccess(false);
po.getSemaphore().notifySingleWaiter();
}
}
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " done");
}
@Override
public void visit(PORemoteSessionClose po) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " ...");
po.getSession().close();
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " done");
}
public void visit(POConnectionClose po) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " ...");
notifyWaitingPOs(new POObject[]{protPO, authPO, openPO, closePO});
closed = true;
pipelineQueue.close();
po.setSuccess(true);
if (po.getSemaphore() != null)
po.getSemaphore().notifySingleWaiter();
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit, po=" + po + " done");
}
public void close() {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", close ...");
try {
closeLock.lock();
if (closeInProgress) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", close in progress, return");
return;
}
closeInProgress = true;
if (heartBeatSender != null) {
TimerRegistry.Singleton().removeTimerListener(heartBeatDelay, heartBeatSender);
heartBeatSender = null;
}
if (idleTimeoutChecker != null) {
TimerRegistry.Singleton().removeTimerListener(idleTimeoutDelay, idleTimeoutChecker);
idleTimeoutChecker = null;
}
} finally {
closeLock.unlock();
}
Semaphore sem = new Semaphore();
dispatch(new POConnectionClose(sem));
sem.waitHere();
if (pTracer.isEnabled()) pTracer.trace(toString(), ", close done");
}
public String toString() {
return "ConnectionDispatcher";
}
private class DispatchVisitor implements FrameVisitor, SaslFrameVisitor {
public void visit(OpenFrame frame) {
dispatch(new POConnectionFrameReceived(frame));
}
public void visit(BeginFrame frame) {
dispatch(new POConnectionFrameReceived(frame));
}
public void visit(AttachFrame frame) {
dispatchSession(frame.getChannel(), new POSessionFrameReceived(frame));
}
public void visit(FlowFrame frame) {
dispatchSession(frame.getChannel(), new POSessionFrameReceived(frame));
}
public void visit(TransferFrame frame) {
dispatchSession(frame.getChannel(), new POSessionFrameReceived(frame));
}
public void visit(DispositionFrame frame) {
dispatchSession(frame.getChannel(), new POSessionFrameReceived(frame));
}
public void visit(DetachFrame frame) {
dispatchSession(frame.getChannel(), new POSessionFrameReceived(frame));
}
public void visit(EndFrame frame) {
dispatch(new POConnectionFrameReceived(frame));
}
public void visit(CloseFrame frame) {
dispatch(new POConnectionFrameReceived(frame));
}
public void visit(SaslMechanismsFrame frame) {
dispatch(new POConnectionFrameReceived(frame, true));
}
public void visit(SaslInitFrame frame) {
dispatch(new POConnectionFrameReceived(frame, true));
}
public void visit(SaslChallengeFrame frame) {
dispatch(new POConnectionFrameReceived(frame, true));
}
public void visit(SaslResponseFrame frame) {
dispatch(new POConnectionFrameReceived(frame, true));
}
public void visit(SaslOutcomeFrame frame) {
dispatch(new POConnectionFrameReceived(frame, true));
awaitProtocolHeader = true;
protocolHandler.setProtHeaderExpected(true);
saslActive = false;
}
public void visit(HeartbeatFrame frame) {
dispatch(new POConnectionFrameReceived(frame));
}
}
private class ConnectionVisitor implements FrameVisitor, SaslFrameVisitor {
public void visit(OpenFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
remoteOpen = frame;
checkBothSidesOpen();
if (frame.getMaxFrameSize() != null)
maxRemoteFrameSize = frame.getMaxFrameSize().getValue() > Integer.MAX_VALUE ? Integer.MAX_VALUE : (int) frame.getMaxFrameSize().getValue();
Milliseconds idleTimeout = frame.getIdleTimeOut();
if (idleTimeout != null) {
heartBeatDelay = idleTimeout.getValue() / 2;
if (heartBeatDelay > 0) {
heartBeatSender = new TimerListener() {
public void performTimeAction(TimerEvent evt) {
dispatch(new POSendHeartBeat(null));
}
};
TimerRegistry.Singleton().addTimerListener(heartBeatDelay, heartBeatSender);
}
}
}
public void visit(BeginFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
try {
int remoteChannel = frame.getChannel();
if (frame.getRemoteChannel() != null) {
Session session = myConnection.getSessionForLocalChannel(frame.getRemoteChannel().getValue());
if (session != null) {
myConnection.mapSessionToRemoteChannel(session, remoteChannel);
session.setRemoteChannel(remoteChannel);
session.dispatch(new POSessionFrameReceived(frame));
} else if (pTracer.isEnabled())
pTracer.trace(toString(), ", invalid channel (no associated session): " + remoteChannel);
} else if (pTracer.isEnabled()) pTracer.trace(toString(), ", local channel field not set");
} catch (Exception e) {
e.printStackTrace();
}
}
public void visit(AttachFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
}
public void visit(FlowFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
}
public void visit(TransferFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
}
public void visit(DispositionFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
}
public void visit(DetachFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
}
public void visit(EndFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
if (frame.getError() == null)
dispatchSession(frame.getChannel(), new POSessionFrameReceived(frame));
else {
Session session = myConnection.getSessionForRemoteChannel(frame.getChannel());
if (session != null)
session.remoteEnd(frame.getError());
}
}
public void visit(CloseFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
// Async remote close due to error
if (frame.getError() != null) {
if (myConnection.getExceptionListener() != null)
myConnection.getExceptionListener().onException(new ConnectionClosedException(frame.getError().getDescription().getValue()));
new Thread(() -> myConnection.cancel()).start();
} else {
remoteClose = frame;
checkBothSidesClosed();
}
}
public void visit(SaslMechanismsFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
saslMechanisms = frame;
checkStartSaslInit();
}
public void visit(SaslInitFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
}
public void visit(SaslChallengeFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
try {
byte[] response = saslClient.evaluateChallenge(frame.getChallenge().getValue());
SaslResponseFrame responseFrame = new SaslResponseFrame(0);
responseFrame.setResponse(new AMQPBinary(response));
outboundHandler.send(responseFrame);
} catch (SaslException e) {
e.printStackTrace();
authPO.setSuccess(false);
authPO.setException(e.toString());
authPO.getSemaphore().notifySingleWaiter();
}
}
public void visit(SaslResponseFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
}
public void visit(SaslOutcomeFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
SaslCode code = frame.getMycode();
if (code.getValue() == SaslCode.OK.getValue())
authPO.setSuccess(true);
else {
authPO.setSuccess(false);
authPO.setException("AuthenticationException: SASLOutcome code=" + code.getValue());
}
authPO.getSemaphore().notifySingleWaiter();
}
public void visit(HeartbeatFrame frame) {
if (pTracer.isEnabled()) pTracer.trace(toString(), ", visit=" + frame);
}
public String toString() {
return "ConnectionVisitor";
}
}
private class CBHandler implements CallbackHandler {
String username = null;
String password = null;
private CBHandler(String username, String password) {
this.username = username;
this.password = password;
}
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
for (int i = 0; i < callbacks.length; i++) {
if (callbacks[i] instanceof NameCallback) {
NameCallback nc = (NameCallback) callbacks[i];
nc.setName(username);
} else if (callbacks[i] instanceof PasswordCallback) {
// prompt the user for sensitive information
PasswordCallback pc = (PasswordCallback) callbacks[i];
pc.setPassword(password.toCharArray());
} else if (callbacks[i] instanceof RealmCallback) {
RealmCallback rc = (RealmCallback) callbacks[i];
rc.setText(remoteHostname);
} else {
throw new UnsupportedCallbackException(callbacks[i], "Unrecognized Callback");
}
}
}
}
private class Disconnecter extends Thread {
String condition;
String description;
private Disconnecter(String condition, String description) {
this.condition = condition;
this.description = description;
}
public void run() {
myConnection.close(condition, description);
}
}
}
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