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/*
KSysGuard, the KDE System Guard
Copyright (c) 1999 - 2001 Chris Schlaeger <[email protected]>
This program is free software; you can redistribute it and/or
modify it under the terms of version 2 of the GNU General Public
License as published by the Free Software Foundation.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdlib.h>
#include <kdebug.h>
#include <klocale.h>
#include <kpassdlg.h>
#include "SensorClient.h"
#include "SensorManager.h"
#include "SensorAgent.h"
/**
This can be used to debug communication problems with the daemon.
Should be set to 0 in any production version.
*/
#define SA_TRACE 0
using namespace KSGRD;
SensorAgent::SensorAgent( SensorManager *sm )
: mSensorManager( sm )
{
/* SensorRequests migrate from the inputFIFO to the processingFIFO. So
* we only have to delete them when they are removed from the
* processingFIFO. */
mInputFIFO.setAutoDelete( false );
mProcessingFIFO.setAutoDelete( true );
mDaemonOnLine = false;
mTransmitting = false;
mState = 0;
}
SensorAgent::~SensorAgent()
{
}
bool SensorAgent::sendRequest( const QString &req, SensorClient *client, int id )
{
/* The request is registered with the FIFO so that the answer can be
* routed back to the requesting client. */
mInputFIFO.prepend( new SensorRequest( req, client, id ) );
#if SA_TRACE
kdDebug(1215) << "-> " << req << "(" << mInputFIFO.count() << "/"
<< mProcessingFIFO.count() << ")" << endl;
#endif
executeCommand();
return false;
}
void SensorAgent::processAnswer( const QString &buffer )
{
#if SA_TRACE
kdDebug(1215) << "<- " << buffer << endl;
#endif
for ( uint i = 0; i < buffer.length(); i++ ) {
if ( buffer[ i ] == '\033' ) {
mState = ( mState + 1 ) & 1;
if ( !mErrorBuffer.isEmpty() && mState == 0 ) {
if ( mErrorBuffer == "RECONFIGURE\n" )
emit reconfigure( this );
else {
/* We just received the end of an error message, so we
* can display it. */
SensorMgr->notify( i18n( "Message from %1:\n%2" )
.arg( mHostName )
.arg( mErrorBuffer ) );
}
mErrorBuffer = QString::null;
}
} else if ( mState == 0 ) // receiving to answerBuffer
mAnswerBuffer += buffer[ i ];
else // receiving to errorBuffer
mErrorBuffer += buffer[ i ];
}
int end;
// And now the real information
while ( ( end = mAnswerBuffer.find( "\nksysguardd> " ) ) >= 0 ) {
#if SA_TRACE
kdDebug(1215) << "<= " << mAnswerBuffer.left( end )
<< "(" << mInputFIFO.count() << "/"
<< mProcessingFIFO.count() << ")" << endl;
#endif
if ( !mDaemonOnLine ) {
/* First '\nksysguardd> ' signals that the daemon is
* ready to serve requests now. */
mDaemonOnLine = true;
#if SA_TRACE
kdDebug(1215) << "Daemon now online!" << endl;
#endif
mAnswerBuffer = QString::null;
break;
}
// remove pending request from FIFO
SensorRequest* req = mProcessingFIFO.last();
if ( !req ) {
kdDebug(1215) << "ERROR: Received answer but have no pending "
<< "request! : " << mAnswerBuffer.left( end ) << endl;
mAnswerBuffer = QString::null;
} else {
if ( !req->client() ) {
/* The client has disappeared before receiving the answer
* to his request. */
} else {
if ( mAnswerBuffer.left( end ) == "UNKNOWN COMMAND" ) {
/* Notify client that the sensor seems to be no longer
* available. */
req->client()->sensorLost( req->id() );
} else {
// Notify client of newly arrived answer.
req->client()->answerReceived( req->id(), mAnswerBuffer.left( end ) );
}
}
mProcessingFIFO.removeLast();
}
// chop off the processed part of the answer buffer
mAnswerBuffer.remove( 0, end + strlen( "\nksysguardd> " ) );
}
executeCommand();
}
void SensorAgent::executeCommand()
{
/* This function is called whenever there is a chance that we have a
* command to pass to the daemon. But the command many only be send
* if the daemon is online and there is no other command currently
* being sent. */
if ( mDaemonOnLine && txReady() && !mInputFIFO.isEmpty() ) {
// take oldest request for input FIFO
SensorRequest* req = mInputFIFO.last();
mInputFIFO.removeLast();
#if SA_TRACE
kdDebug(1215) << ">> " << req->request().ascii() << "(" << mInputFIFO.count()
<< "/" << mProcessingFIFO.count() << ")" << endl;
#endif
// send request to daemon
QString cmdWithNL = req->request() + "\n";
if ( writeMsg( cmdWithNL.ascii(), cmdWithNL.length() ) )
mTransmitting = true;
else
kdDebug(1215) << "SensorAgent::writeMsg() failed" << endl;
// add request to processing FIFO
mProcessingFIFO.prepend( req );
}
}
void SensorAgent::disconnectClient( SensorClient *client )
{
for ( SensorRequest *req = mInputFIFO.first(); req; req = mInputFIFO.next() )
if ( req->client() == client )
req->setClient( 0 );
for ( SensorRequest *req = mProcessingFIFO.first(); req; req = mProcessingFIFO.next() )
if ( req->client() == client )
req->setClient( 0 );
}
SensorManager *SensorAgent::sensorManager()
{
return mSensorManager;
}
void SensorAgent::setDaemonOnLine( bool value )
{
mDaemonOnLine = value;
}
bool SensorAgent::daemonOnLine() const
{
return mDaemonOnLine;
}
void SensorAgent::setTransmitting( bool value )
{
mTransmitting = value;
}
bool SensorAgent::transmitting() const
{
return mTransmitting;
}
void SensorAgent::setHostName( const QString &hostName )
{
mHostName = hostName;
}
const QString &SensorAgent::hostName() const
{
return mHostName;
}
SensorRequest::SensorRequest( const QString &request, SensorClient *client, int id )
: mRequest( request ), mClient( client ), mId( id )
{
}
SensorRequest::~SensorRequest()
{
}
void SensorRequest::setRequest( const QString &request )
{
mRequest = request;
}
QString SensorRequest::request() const
{
return mRequest;
}
void SensorRequest::setClient( SensorClient *client )
{
mClient = client;
}
SensorClient *SensorRequest::client()
{
return mClient;
}
void SensorRequest::setId( int id )
{
mId = id;
}
int SensorRequest::id()
{
return mId;
}
#include "SensorAgent.moc"
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