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/*
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* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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* Main log server engine.
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* Process log requests from multiple clients simultaneously.
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*
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*/
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/**
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@file server.cpp
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*/
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#include "server.h"
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CLogServer* CLogServer::NewL()
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/**
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* @return - Instance of the log server
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*/
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{
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CLogServer * server = new (ELeave) CLogServer();
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CleanupStack::PushL(server);
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server->ConstructL();
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// CServer base class call
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server->StartL(KFileLogrerServerName);
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CleanupStack::Pop(server);
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return server;
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}
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void CLogServer::ConstructL()
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/**
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* Second phase construction
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*/
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{
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User::LeaveIfError(Fs().Connect());
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}
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CLogServer::CLogServer() : CServer2(EPriorityStandard,ESharableSessions)
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/**
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* Constructor
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*/
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{
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}
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CLogServer::~CLogServer()
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/**
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* Destructor
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*/
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{
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// Close the array of control structures
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LogControl().Close();
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Fs().Close();
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}
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CSession2* CLogServer::NewSessionL(const TVersion& /*aVersion*/,const RMessage2& /*aMessage*/) const
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/**
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* @param RMessage - RMessage for the session open
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*/
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{
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// Just create the session
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CLogSession* session = new (ELeave) CLogSession();
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return session;
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}
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void CLogServer::ControlComplete(CLogFileControl& aControl)
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/**
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* @param aControl - Logfile control class reference
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*
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* Checks to see if this control session can be removed
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*/
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{
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// Check session count and the data buffers on the queue
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if(aControl.SessionCount() || !aControl.QueueEmpty())
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return;
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// There are no subsessions mapped to the logfile control class and
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// no data buffers on its write queue
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// Loop through the server's control array and remove it then delete it
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TInt i;
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for(i=0;i<LogControl().Count();i++)
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{
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if(&aControl == LogControl()[i])
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{
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// Done
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LogControl().Remove(i);
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delete &aControl;
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break;
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}
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}
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// If it's the last one then exit the server
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if(!LogControl().Count())
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CActiveScheduler::Stop();
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}
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///////
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CLogSession::CLogSession()
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/**
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* Constructor
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*/
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{
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}
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CLogSession::~CLogSession()
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/**
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* Destructor
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*/
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{
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// Check for null
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// Session close without a createlog call leaves iControl null
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if(!iControl)
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return;
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// A logfile control structure can have multiple server sessions
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// decrement its server session count
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iControl->RemoveSession();
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CLogServer* p=(CLogServer*) Server();
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// Shuts Down the server if this is the last open session
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p->ControlComplete(*iControl);
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}
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void CLogSession::ServiceL(const RMessage2& aMessage)
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/**
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* @param aMessage - Function and data for the session
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*/
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{
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switch(aMessage.Function())
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{
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// API CreateLog() call
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case RFileFlogger::ECreateLog :
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{
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// Sanity check to make sure it's not been called multiple times
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if(iControl)
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{
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aMessage.Complete(KErrInUse);
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break;
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}
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// Get the filepath
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// size policed on the client side
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TBuf<KMaxLoggerFilePath> logFilePath;
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// Read it
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aMessage.ReadL(0,logFilePath);
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// Get the log mode in the second argument
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RFileFlogger::TLogMode logMode;
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logMode = (RFileFlogger::TLogMode)aMessage.Int1();
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// Get a pointer to the parent server
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CLogServer* server=(CLogServer*) Server();
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// For compare's convert the whole path to lower case
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logFilePath.LowerCase();
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// Get rid of leading and trailing spaces.
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logFilePath.Trim();
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// Loop the through the server's logfile control class list
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// to see if there's a match.
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TInt i;
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for(i=0;i<server->LogControl().Count();i++)
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{
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if(server->LogControl()[i]->LogFile() == logFilePath)
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// This file's already in open so we don't have to open it
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break;
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}
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TInt err = KErrNone;
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// Check the count
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if(i < server->LogControl().Count())
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// Map this session to an existing logfile control class in the list
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iControl = server->LogControl()[i];
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else
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{
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// Create a new logfile control class
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// creates/opens the logfile
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TRAP(err,iControl = CLogFileControl::NewL(*server,logFilePath,logMode));
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if(!err)
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{ // nancy
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// find out the type of output format and assign to this new created control
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TInt error = logFilePath.Find(_L(".xml"));
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if(error==KErrNotFound) iControl->SetLogType(CLogFileControl::ETxt);
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else iControl->SetLogType(CLogFileControl::EXml);
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// end nancy
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// Append it to the logfile control class list
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server->LogControl().Append(iControl);
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}
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}
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if(!err)
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// Increment its session count
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iControl->AddSession();
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aMessage.Complete(err);
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}
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break;
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// One of the API write calls
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case RFileFlogger::EWriteLog :
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{
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// Sanity check
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if(!iControl)
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{
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aMessage.Complete(KErrNotFound);
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break;
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}
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// Data can be any size
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// Get the length from second argument
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TInt bufferLength = aMessage.Int1();
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// Get a heap buffer of the right size
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HBufC8* buffer = HBufC8::NewLC(bufferLength);
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TPtr8 ptr(buffer->Des());
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// read the data
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aMessage.ReadL(0,ptr);
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// Get a buffer control class contructed with the heap data
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// takes ownership
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CLogBuffer* logBuffer = new (ELeave) CLogBuffer(*buffer);
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CleanupStack::Pop(buffer);
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// Add it to the logfile control class buffer queue
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iControl->AddLogBuffer(*logBuffer);
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if(!iControl->IsActive())
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// AO is idle, kick into life
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iControl->Kick();
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aMessage.Complete(KErrNone);
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}
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break;
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default:
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break;
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}
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}
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///////
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CLogFileControl* CLogFileControl::NewL(CLogServer& aParent, const TDesC& aLogFilePath,RFileFlogger::TLogMode aMode)
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/**
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* @param aParent - Server reference for callback
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* @param aLogFilePath - Full path and filename of the logfile
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* @param aMode - Overwrite or Append
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*
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* First phase construction for logfile control class
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*/
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{
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CLogFileControl* self = new (ELeave) CLogFileControl(aParent,aLogFilePath);
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CleanupStack::PushL(self);
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self->ConstructL(aMode);
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CleanupStack::Pop();
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return self;
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}
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CLogFileControl::CLogFileControl(CLogServer& aParent,const TDesC& aLogFilePath) :
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iParent(aParent),
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iLogFileName(aLogFilePath),
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iTransmitted(EFalse)
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/**
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* @param aParent - Server reference for callback
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* @param aLogFilePath - Full path and filename of the logfile
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*
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* Constructor - Safe initialisation
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*/
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{
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iQueue.SetOffset(CLogBuffer::LinkOffset());
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}
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void CLogFileControl::ConstructL(RFileFlogger::TLogMode aMode)
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/**
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* @param aMode - Overwrite or Append
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*
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* Second phase construction - Create or open the logfile
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*/
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{
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if(aMode == RFileFlogger::ELogModeOverWrite)
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// In overwrite mode replace
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User::LeaveIfError(iLogFile.Replace(iParent.Fs(),iLogFileName,EFileWrite));
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else
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{
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// For append try open then replace
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TInt err = iLogFile.Open(iParent.Fs(),iLogFileName,EFileWrite);
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if(err != KErrNone)
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// Bomb out if replace fails
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User::LeaveIfError(iLogFile.Replace(iParent.Fs(),iLogFileName,EFileWrite));
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else
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{
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// Open worked. Position at EOF
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TInt pos;
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iLogFile.Size(pos);
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User::LeaveIfError(iLogFile.Seek(ESeekEnd,pos));
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}
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}
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}
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CLogFileControl::~CLogFileControl()
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/**
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* Destructor
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* The server maintains a list of these classes and will not destruct one if there
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* is data on its queue
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* Destructor just closes the file handle.
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*/
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{
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iLogFile.Close();
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}
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void CLogFileControl::RunL()
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/**
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* Main File writing pump
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* Called on write completion or Kick() by the session that accepts the data
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*/
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{
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#if (defined _DEBUG)
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_LIT(KPanic,"LogEng RunL()");
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#endif
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__ASSERT_DEBUG(iStatus.Int() == KErrNone,User::Panic(KPanic,iStatus.Int()));
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// Check to see if this is the result of write completion
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if(iTransmitted)
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{
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// Write completed
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// Remove the buffer at the head of the queue and free it
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CLogBuffer* buffer = iQueue.First();
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iQueue.Remove(*buffer);
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delete buffer;
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}
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// Check to see if there's more on the queue
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if(!iQueue.IsEmpty())
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{
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// There is so write the head of the queue
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CLogBuffer* buffer = iQueue.First();
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SetActive();
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// Set the flag to say we've transmitted
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iTransmitted = ETrue;
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// ------------------------------------
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if(iLogFormat==ETxt) WriteTxt(buffer->Buf());
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else WriteXml(buffer->Buf());
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}
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else
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{
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// Nothing on the queue
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iTransmitted = EFalse;
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// Call into the server to check if this resource can be freed
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iParent.ControlComplete(*this);
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}
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}
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void CLogFileControl::WriteXml(const TDesC8 &aDes)
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/**
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* @param aDes - send a aDes string in xml format to a log file
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*/
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{
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/*--------- Maintaince Warning: -----------------------------------
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******* the fomat of below is sensible from client original format.
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******* Any change should match actual string formated from client.
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******* Double check the code on client side
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* The current assumtion of format:
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* First string values are seperated by sign " - " and extra pair of fields are
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* seperated from main log message by long unusual string "LogFieldsRequiredBeingAddedToAboveLogMessage"
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* The \t used to seperate field name and field value and \r\n used to seperate
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* each other from those pairs of field
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* \t\t\t\t\t\t is used to end of whole string
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--------------------------------------------------------------------------------*/
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_LIT8(KxmlHeader,"<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\r\n<LOGFILE>");
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//The order of variables:
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// time - aTime
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// Severity - aSeverity
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// Thread - aThread
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// Filename - aFilename
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// Linenumber - aLinenumber
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// Text - aText
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// Start of string retrive/deformating
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HBufC8* pBuf1 = HBufC8::NewL(KMaxLoggerLineLength*2); //(aDes.Length()+200);
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if(!pBuf1)
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{
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return; // no memory
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}
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TPtr8 aPtr(pBuf1->Des()); // used for searching
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TPtr8 alogbuf(pBuf1->Des()); //used for final log
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aPtr.Append(aDes);
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TPtrC8 SearchBuf;
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TInt aCount[8];
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aCount[0]=0;
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TInt posI(0);
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// retrive log message:
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// Retrive common part of log message:
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for(TInt i = 1; i<6; i++)
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{
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SearchBuf.Set(aPtr.Mid(posI));
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aCount[i]=SearchBuf.Find(KSeperation8)+posI;
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posI=aCount[i]+3;
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if(aCount[i]<aCount[i-1]) return; // wrong format string from client
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}
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// seperating common log message and extra log fields will be easy for future maintaince.
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TLogField8* alogField = new TLogField8[6]; // the common part of log message for both
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// with and without extra log fields
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if(!alogField) return; // no memory
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TLogField8* extralogField=NULL; // only applied to extra log fields
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TInt alength=0; // a length of array of extra log fields
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alogField[0].iLogTag8.Copy(_L8("TIME"));
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alogField[1].iLogTag8.Copy(_L8("SEVERITY"));
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alogField[2].iLogTag8.Copy(_L8("THREAD"));
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alogField[3].iLogTag8.Copy(_L8("FILENAME"));
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alogField[4].iLogTag8.Copy(_L8("LINENUMBER"));
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alogField[5].iLogTag8.Copy(_L8("TEXT"));
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alogField[0].iLogValue8.Copy(aPtr.Mid(aCount[0],aCount[1]-aCount[0]));
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for(TInt i=1; i<5; i++)
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{
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alogField[i].iLogValue8.Copy(aPtr.Mid(aCount[i]+3,aCount[i+1]-aCount[i]-3));
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}
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SearchBuf.Set(aPtr.Mid(posI));
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aCount[6]=SearchBuf.Find(_L8("LogFieldsRequiredBeingAddedToAboveLogMessage"))+posI;
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if(aCount[6]<posI) // no addtional fields. Find return value is KErrNotFound or >0
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{
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TInt currentLength = alogField[5].iLogValue8.Length() ;
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//this sentence will append the log info without buffer limit.
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TInt newAppendLength = aDes.Length()-aCount[5]-5;
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//The max length for log buff in this
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TInt bufferLeft = alogField[5].iLogValue8.MaxLength() - currentLength;
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|
428 |
// get the smaller one between the two
|
|
429 |
TInt enabledLength = bufferLeft > newAppendLength ? newAppendLength : bufferLeft ;
|
|
430 |
alogField[5].iLogValue8.Copy(aPtr.Mid(aCount[5]+3,enabledLength));
|
|
431 |
//alogField[5].iLogValue8.Copy(aPtr.Mid(aCount[5]+3,aDes.Length()-aCount[5]-5));
|
|
432 |
}
|
|
433 |
else
|
|
434 |
{
|
|
435 |
alogField[5].iLogValue8.Copy(aPtr.Mid(aCount[5]+3,aCount[6]-aCount[5]-5));
|
|
436 |
posI=aCount[6]+45; //45 is from the length of long string and a tab
|
|
437 |
SearchBuf.Set(aPtr.Mid(posI));
|
|
438 |
aCount[7]=SearchBuf.Find(_L8("\r\n"))+posI;
|
|
439 |
TLex8 lex(aPtr.Mid(posI,aCount[7]-posI)); // get the length
|
|
440 |
TInt err=lex.Val(alength);
|
|
441 |
if (err) alength=0; // ignor the extra log fields. Let the log go
|
|
442 |
|
|
443 |
// Retrive the extra log fields
|
|
444 |
extralogField = new TLogField8[alength];
|
|
445 |
if(!extralogField) return; // no memory
|
|
446 |
for(TInt i=0; i<alength; i++)
|
|
447 |
{
|
|
448 |
aCount[6]=aCount[7]+2;
|
|
449 |
SearchBuf.Set(aPtr.Mid(aCount[6]));
|
|
450 |
aCount[7]=SearchBuf.Find(_L8("\t"))+aCount[6];
|
|
451 |
extralogField[i].iLogTag8.Copy(aPtr.Mid(aCount[6],aCount[7]-aCount[6]));
|
|
452 |
aCount[6]=aCount[7]+1;
|
|
453 |
SearchBuf.Set(aPtr.Mid(aCount[6]));
|
|
454 |
aCount[7]=SearchBuf.Find(_L8("\r\n"))+aCount[6];
|
|
455 |
extralogField[i].iLogValue8.Copy(aPtr.Mid(aCount[6],aCount[7]-aCount[6]));
|
|
456 |
}
|
|
457 |
}
|
|
458 |
|
|
459 |
// Start to organize an XML format:
|
|
460 |
TInt afileSize;
|
|
461 |
_LIT(KLogMutex, "LoggingServerMutex");
|
|
462 |
RMutex mutex;
|
|
463 |
TInt r = mutex.CreateGlobal(KLogMutex);
|
|
464 |
if(r==KErrAlreadyExists)
|
|
465 |
r = mutex.OpenGlobal(KLogMutex);
|
|
466 |
|
|
467 |
if(!r) mutex.Wait(); // if still failed, let logging go
|
|
468 |
//without bother the mutex
|
|
469 |
|
|
470 |
iLogFile.Size(afileSize);
|
|
471 |
if(afileSize<12) // 12 is from charters of "\r\n</LOGFILE>"
|
|
472 |
//It shoud happened once at the beginning of the file
|
|
473 |
// such as overwrite mode
|
|
474 |
{
|
|
475 |
afileSize=12; // used for lock position
|
|
476 |
alogbuf.Copy(KxmlHeader);
|
|
477 |
}
|
|
478 |
alogbuf.Append(_L8("\r\n<MESSAGE>\r\n"));
|
|
479 |
for(TInt i=0; i<6; i++)
|
|
480 |
{
|
|
481 |
alogbuf.Append(_L8(" <"));
|
|
482 |
alogbuf.Append(alogField[i].iLogTag8);
|
|
483 |
alogbuf.Append(_L8(">"));
|
|
484 |
alogbuf.Append(alogField[i].iLogValue8);
|
|
485 |
alogbuf.Append(_L8("</"));
|
|
486 |
alogbuf.Append(alogField[i].iLogTag8);
|
|
487 |
alogbuf.Append(_L8(">\r\n"));
|
|
488 |
}
|
|
489 |
for(TInt i=0; i<alength; i++)
|
|
490 |
{
|
|
491 |
alogbuf.Append(_L8(" <"));
|
|
492 |
alogbuf.Append(extralogField[i].iLogTag8);
|
|
493 |
alogbuf.Append(_L8(">"));
|
|
494 |
alogbuf.Append(extralogField[i].iLogValue8);
|
|
495 |
alogbuf.Append(_L8("</"));
|
|
496 |
alogbuf.Append(extralogField[i].iLogTag8);
|
|
497 |
alogbuf.Append(_L8(">\r\n"));
|
|
498 |
}
|
|
499 |
|
|
500 |
alogbuf.Append(_L8("</MESSAGE>"));
|
|
501 |
alogbuf.Append(_L8("\r\n</LOGFILE>"));
|
|
502 |
|
|
503 |
iLogFile.Write(afileSize-12,alogbuf,iStatus);
|
|
504 |
iLogFile.Flush();
|
|
505 |
|
|
506 |
if(!r)
|
|
507 |
{
|
|
508 |
mutex.Signal();
|
|
509 |
mutex.Close();
|
|
510 |
}
|
|
511 |
|
|
512 |
if(extralogField) delete[] extralogField;
|
|
513 |
delete[] alogField;
|
|
514 |
delete pBuf1;
|
|
515 |
|
|
516 |
}
|
|
517 |
|
|
518 |
void CLogFileControl::WriteTxt(const TDesC8 &aDes)
|
|
519 |
/**
|
|
520 |
* @param aDes - send a aDes string in xml format to a log file
|
|
521 |
*/
|
|
522 |
{
|
|
523 |
/*--------- Maintaince Warning for aLogBuffer -----------------------------------
|
|
524 |
******* the fomat of below is sensible from client original format.
|
|
525 |
******* Any change should match actual string formated from client.
|
|
526 |
******* Double check the code on client side
|
|
527 |
|
|
528 |
* The current assumtion of format:
|
|
529 |
* First string values are seperated by sign " - " and extra pair of fields are
|
|
530 |
* seperated from main log message by long unusual string "LogFieldsRequiredBeingAddedToAboveLogMessage"
|
|
531 |
* The \t used to seperate field name and field value and \r\n used to seperate
|
|
532 |
* each other from those pairs of field
|
|
533 |
--------------------------------------------------------------------------------*/
|
|
534 |
iLogFile.Write(aDes,iStatus);
|
|
535 |
}
|
|
536 |
///////
|
|
537 |
CLogBuffer::CLogBuffer(HBufC8& aLogBuffer) : iLogBuffer(aLogBuffer)
|
|
538 |
/**
|
|
539 |
* @param aLogBuffer - Heap descriptor. This class takes ownership
|
|
540 |
* Constructor
|
|
541 |
*/
|
|
542 |
{
|
|
543 |
}
|
|
544 |
|
|
545 |
CLogBuffer::~CLogBuffer()
|
|
546 |
/**
|
|
547 |
* Destructor
|
|
548 |
* This class owns a heap buffer so just free it
|
|
549 |
*/
|
|
550 |
{
|
|
551 |
delete &iLogBuffer;
|
|
552 |
}
|