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tdelibs/khtml/java/kjavaprocess.cpp

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/* This file is part of the KDE project
*
* Copyright (C) 2000 Richard Moore <rich@kde.org>
* 2000 Wynn Wilkes <wynnw@caldera.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "kjavaprocess.h"
#include <kdebug.h>
#include <kio/kprotocolmanager.h>
#include <tqtextstream.h>
#include <tqmap.h>
#include <config.h>
#include <unistd.h>
#include <tqptrlist.h>
class KJavaProcessPrivate
{
friend class KJavaProcess;
private:
TQString jvmPath;
TQString classPath;
TQString mainClass;
TQString extraArgs;
TQString classArgs;
TQPtrList<TQByteArray> BufferList;
TQMap<TQString, TQString> systemProps;
bool processKilled;
};
KJavaProcess::KJavaProcess() : KProcess()
{
d = new KJavaProcessPrivate;
d->BufferList.setAutoDelete( true );
d->processKilled = false;
javaProcess = this; //new KProcess();
connect( javaProcess, TQT_SIGNAL( wroteStdin( KProcess * ) ),
this, TQT_SLOT( slotWroteData() ) );
connect( javaProcess, TQT_SIGNAL( receivedStdout( int, int& ) ),
this, TQT_SLOT( slotReceivedData(int, int&) ) );
connect( javaProcess, TQT_SIGNAL( processExited (KProcess *) ),
this, TQT_SLOT( slotExited (KProcess *) ) );
d->jvmPath = "java";
d->mainClass = "-help";
}
KJavaProcess::~KJavaProcess()
{
if ( isRunning() )
{
kdDebug(6100) << "stopping java process" << endl;
stopJava();
}
//delete javaProcess;
delete d;
}
bool KJavaProcess::isRunning()
{
return javaProcess->isRunning();
}
bool KJavaProcess::startJava()
{
return invokeJVM();
}
void KJavaProcess::stopJava()
{
killJVM();
}
void KJavaProcess::setJVMPath( const TQString& path )
{
d->jvmPath = path;
}
void KJavaProcess::setClasspath( const TQString& classpath )
{
d->classPath = classpath;
}
void KJavaProcess::setSystemProperty( const TQString& name,
const TQString& value )
{
d->systemProps.insert( name, value );
}
void KJavaProcess::setMainClass( const TQString& className )
{
d->mainClass = className;
}
void KJavaProcess::setExtraArgs( const TQString& args )
{
d->extraArgs = args;
}
void KJavaProcess::setClassArgs( const TQString& args )
{
d->classArgs = args;
}
//Private Utility Functions used by the two send() methods
TQByteArray* KJavaProcess::addArgs( char cmd_code, const TQStringList& args )
{
//the buffer to store stuff, etc.
TQByteArray* const buff = new TQByteArray();
TQTextOStream output( *buff );
const char sep = 0;
//make space for the command size: 8 characters...
const TQCString space( " " );
output << space;
//write command code
output << cmd_code;
//store the arguments...
if( args.isEmpty() )
{
output << sep;
}
else
{
TQStringList::ConstIterator it = args.begin();
const TQStringList::ConstIterator itEnd = args.end();
for( ; it != itEnd; ++it )
{
if( !(*it).isEmpty() )
{
output << (*it).local8Bit();
}
output << sep;
}
}
return buff;
}
void KJavaProcess::storeSize( TQByteArray* buff )
{
const int size = buff->size() - 8; //subtract out the length of the size_str
const TQString size_str = TQString("%1").arg( size, 8 );
kdDebug(6100) << "KJavaProcess::storeSize, size = " << size_str << endl;
const char* size_ptr = size_str.latin1();
for( int i = 0; i < 8; ++i )
buff->at(i) = size_ptr[i];
}
void KJavaProcess::sendBuffer( TQByteArray* buff )
{
d->BufferList.append( buff );
if( d->BufferList.count() == 1)
{
popBuffer();
}
}
void KJavaProcess::send( char cmd_code, const TQStringList& args )
{
if( isRunning() )
{
TQByteArray* const buff = addArgs( cmd_code, args );
storeSize( buff );
kdDebug(6100) << "<KJavaProcess::send " << (int)cmd_code << endl;
sendBuffer( buff );
}
}
void KJavaProcess::send( char cmd_code, const TQStringList& args,
const TQByteArray& data )
{
if( isRunning() )
{
kdDebug(6100) << "KJavaProcess::send, qbytearray is size = " << data.size() << endl;
TQByteArray* const buff = addArgs( cmd_code, args );
const int cur_size = buff->size();
const int data_size = data.size();
buff->resize( cur_size + data_size );
memcpy( buff->data() + cur_size, data.data(), data_size );
storeSize( buff );
sendBuffer( buff );
}
}
void KJavaProcess::popBuffer()
{
TQByteArray* const buf = d->BufferList.first();
if( buf )
{
// DEBUG stuff...
// kdDebug(6100) << "Sending buffer to java, buffer = >>";
// for( unsigned int i = 0; i < buf->size(); i++ )
// {
// if( buf->at(i) == (char)0 )
// kdDebug(6100) << "<SEP>";
// else if( buf->at(i) > 0 && buf->at(i) < 10 )
// kdDebug(6100) << "<CMD " << (int) buf->at(i) << ">";
// else
// kdDebug(6100) << buf->at(i);
// }
// kdDebug(6100) << "<<" << endl;
//write the data
if ( !javaProcess->writeStdin( buf->data(),
buf->size() ) )
{
kdError(6100) << "Could not write command" << endl;
}
}
}
void KJavaProcess::slotWroteData( )
{
//do this here- we can't free the data until we know it went through
d->BufferList.removeFirst(); //this should delete it since we setAutoDelete(true)
kdDebug(6100) << "slotWroteData " << d->BufferList.count() << endl;
if ( !d->BufferList.isEmpty() )
{
popBuffer();
}
}
bool KJavaProcess::invokeJVM()
{
*javaProcess << d->jvmPath;
if( !d->classPath.isEmpty() )
{
*javaProcess << "-classpath";
*javaProcess << d->classPath;
}
//set the system properties, iterate through the qmap of system properties
TQMap<TQString,TQString>::ConstIterator it = d->systemProps.begin();
const TQMap<TQString,TQString>::ConstIterator itEnd = d->systemProps.end();
for( ; it != itEnd; ++it )
{
TQString currarg;
if( !it.key().isEmpty() )
{
currarg = "-D" + it.key();
if( !it.data().isEmpty() )
currarg += "=" + it.data();
}
if( !currarg.isEmpty() )
*javaProcess << currarg;
}
//load the extra user-defined arguments
if( !d->extraArgs.isEmpty() )
{
// BUG HERE: if an argument contains space (-Dname="My name")
// this parsing will fail. Need more sophisticated parsing -- use KShell?
const TQStringList args = TQStringList::split( " ", d->extraArgs );
TQStringList::ConstIterator it = args.begin();
const TQStringList::ConstIterator itEnd = args.end();
for ( ; it != itEnd; ++it )
*javaProcess << *it;
}
*javaProcess << d->mainClass;
if ( !d->classArgs.isNull() )
*javaProcess << d->classArgs;
kdDebug(6100) << "Invoking JVM now...with arguments = " << endl;
TQString argStr;
TQTextOStream stream( &argStr );
const TQValueList<TQCString> args = javaProcess->args();
qCopy( args.begin(), args.end(), TQTextOStreamIterator<TQCString>( stream, " " ) );
kdDebug(6100) << argStr << endl;
KProcess::Communication flags = (KProcess::Communication)
(KProcess::Stdin | KProcess::Stdout |
KProcess::NoRead);
const bool rval = javaProcess->start( KProcess::NotifyOnExit, flags );
if( rval )
javaProcess->resume(); //start processing stdout on the java process
else
killJVM();
return rval;
}
void KJavaProcess::killJVM()
{
d->processKilled = true;
disconnect( javaProcess, TQT_SIGNAL( receivedStdout( int, int& ) ),
this, TQT_SLOT( slotReceivedData(int, int&) ) );
javaProcess->kill();
}
void KJavaProcess::flushBuffers()
{
while ( !d->BufferList.isEmpty() ) {
if (innot)
slotSendData(0);
else
d->BufferList.removeFirst(); //note: AutoDelete is true
}
}
/* In this method, read one command and send it to the d->appletServer
* then return, so we don't block the event handling
*/
void KJavaProcess::slotReceivedData( int fd, int& len )
{
//read out the length of the message,
//read the message and send it to the applet server
char length[9] = { 0 };
const int num_bytes = ::read( fd, length, 8 );
if( !num_bytes )
{
len = 0;
return;
}
if( num_bytes == -1 )
{
kdError(6100) << "could not read 8 characters for the message length!!!!" << endl;
len = 0;
return;
}
const TQString lengthstr( length );
bool ok;
const int num_len = lengthstr.toInt( &ok );
if( !ok )
{
kdError(6100) << "could not parse length out of: " << lengthstr << endl;
len = num_bytes;
return;
}
//now parse out the rest of the message.
char* const msg = new char[num_len];
const int num_bytes_msg = ::read( fd, msg, num_len );
if( num_bytes_msg == -1 || num_bytes_msg != num_len )
{
kdError(6100) << "could not read the msg, num_bytes_msg = " << num_bytes_msg << endl;
delete[] msg;
len = num_bytes;
return;
}
TQByteArray qb;
emit received( qb.duplicate( msg, num_len ) );
delete[] msg;
len = num_bytes + num_bytes_msg;
}
void KJavaProcess::slotExited( KProcess *process )
{
if (process == javaProcess) {
int status = -1;
if (!d->processKilled) {
status = javaProcess->exitStatus();
}
kdDebug(6100) << "jvm exited with status " << status << endl;
emit exited(status);
}
}
#include "kjavaprocess.moc"