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Code Issues Wiki Activity

[fix] Bug 287158: [terminal][telnet] Connect worker is giving up to early

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This commit is contained in:
Uwe Stieber 2009-08-20 10:03:58 +00:00
parent 874606fed5
commit f43b89df95
1 changed files with 66 additions and 33 deletions
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99
terminal/org.eclipse.tm.terminal.telnet/src/org/eclipse/tm/internal/terminal/telnet/TelnetConnectWorker.java
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@ -1,5 +1,5 @@
/*******************************************************************************
* Copyright (c) 2003, 2007 Wind River Systems, Inc. and others.
* Copyright (c) 2003, 2009 Wind River Systems, Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
@ -11,8 +11,9 @@
* Helmut Haigermoser and Ted Williams.
*
* Contributors:
* Michael Scharf (Wind River) - extracted from TerminalControl
* Michael Scharf (Wind River) - extracted from TerminalControl
* Martin Oberhuber (Wind River) - fixed copyright headers and beautified
* Uwe Stieber (Wind River) - [287158][terminal][telnet] Connect worker is giving up to early
*******************************************************************************/
package org.eclipse.tm.internal.terminal.telnet;
@ -35,43 +36,75 @@ class TelnetConnectWorker extends Thread {
fControl.setState(TerminalState.CONNECTING);
}
public void run() {
try {
int nTimeout = fConn.getTelnetSettings().getTimeout() * 1000;
String strHost = fConn.getTelnetSettings().getHost();
int nPort = fConn.getTelnetSettings().getNetworkPort();
InetSocketAddress address = new InetSocketAddress(strHost, nPort);
Socket socket=new Socket();
// Retry the connect with after a little pause in case the
// remote telnet server isn't ready. ConnectExceptions might
// happen if the telnet server process did not initialized itself.
// This is seen especially if the telnet server is a process
// providing it's input and output via a built in telnet server.
int remaining = 10;
socket.connect(address, nTimeout);
while (remaining >= 0) {
// Pause before we re-try if the remaining tries are less than the initial value
if (remaining < 10) try { Thread.sleep(500); } catch (InterruptedException e) { /* ignored on purpose */ }
// This next call causes reads on the socket to see TCP urgent data
// inline with the rest of the non-urgent data. Without this call, TCP
// urgent data is silently dropped by Java. This is required for
// TELNET support, because when the TELNET server sends "IAC DM", the
// IAC byte is TCP urgent data. If urgent data is silently dropped, we
// only see the DM, which looks like an ISO Latin-1 '�' character.
try {
int nTimeout = fConn.getTelnetSettings().getTimeout() * 1000;
String strHost = fConn.getTelnetSettings().getHost();
int nPort = fConn.getTelnetSettings().getNetworkPort();
InetSocketAddress address = new InetSocketAddress(strHost, nPort);
Socket socket=new Socket();
socket.setOOBInline(true);
fConn.setSocket(socket);
socket.connect(address, nTimeout);
TelnetConnection connection=new TelnetConnection(fConn, socket);
socket.setKeepAlive(true);
fConn.setTelnetConnection(connection);
connection.start();
fControl.setState(TerminalState.CONNECTED);
// If we get to this point, the connect succeeded and we will
// force the remaining counter to be 0.
remaining = 0;
} catch (UnknownHostException ex) {
String txt="Unknown host: " + ex.getMessage(); //$NON-NLS-1$
connectFailed(txt,"Unknown host: " + ex.getMessage() + "\n"); //$NON-NLS-1$ //$NON-NLS-2$
} catch (SocketTimeoutException socketTimeoutException) {
connectFailed(socketTimeoutException.getMessage(), "Connection Error!\n" + socketTimeoutException.getMessage()); //$NON-NLS-1$
} catch (ConnectException connectException) {
connectFailed(connectException.getMessage(),"Connection refused!"); //$NON-NLS-1$
} catch (Exception exception) {
Logger.logException(exception);
// This next call causes reads on the socket to see TCP urgent data
// inline with the rest of the non-urgent data. Without this call, TCP
// urgent data is silently dropped by Java. This is required for
// TELNET support, because when the TELNET server sends "IAC DM", the
// IAC byte is TCP urgent data. If urgent data is silently dropped, we
// only see the DM, which looks like an ISO Latin-1 '�' character.
connectFailed(exception.getMessage(),""); //$NON-NLS-1$
socket.setOOBInline(true);
fConn.setSocket(socket);
TelnetConnection connection=new TelnetConnection(fConn, socket);
socket.setKeepAlive(true);
fConn.setTelnetConnection(connection);
connection.start();
fControl.setState(TerminalState.CONNECTED);
} catch (UnknownHostException ex) {
// No re-try in case of UnknownHostException, there is no indication that
// the DNS will fix itself
remaining = 0;
//Construct error message and signal failed
String txt="Unknown host: " + ex.getMessage(); //$NON-NLS-1$
connectFailed(txt,"Unknown host: " + ex.getMessage() + "\n"); //$NON-NLS-1$ //$NON-NLS-2$
} catch (SocketTimeoutException socketTimeoutException) {
// Time out occurred. No re-try in this case either. Time out can
// be increased by the user. Multiplying the timeout with the remaining
// counter is not desired.
remaining = 0;
// Construct error message and signal failed
connectFailed(socketTimeoutException.getMessage(), "Connection Error!\n" + socketTimeoutException.getMessage()); //$NON-NLS-1$
} catch (ConnectException connectException) {
// In case of a ConnectException, do a re-try. The server could have been
// simply not ready yet and the worker would give up to early.
if (remaining == 0) connectFailed(connectException.getMessage(),"Connection refused!"); //$NON-NLS-1$
} catch (Exception exception) {
// Any other exception on connect. No re-try in this case either
remaining = 0;
// Log the exception
Logger.logException(exception);
// And signal failed
connectFailed(exception.getMessage(),""); //$NON-NLS-1$
} finally {
remaining--;
}
}
}