void Dispatcher::dispatch( const std::vector<NodePtr> &nodes ) const
{
// clear job directory, so that if our node validation fails,
// jobDirectory() won't return the result from the previous dispatch.
m_jobDirectory = "";
// validate the nodes we've been given
if ( nodes.empty() )
{
throw IECore::Exception( getName().string() + ": Must specify at least one node to dispatch." );
}
std::vector<ExecutableNodePtr> executables;
const ScriptNode *script = (*nodes.begin())->scriptNode();
for ( std::vector<NodePtr>::const_iterator nIt = nodes.begin(); nIt != nodes.end(); ++nIt )
{
const ScriptNode *currentScript = (*nIt)->scriptNode();
if ( !currentScript || currentScript != script )
{
throw IECore::Exception( getName().string() + ": Dispatched nodes must all belong to the same ScriptNode." );
}
if ( ExecutableNode *executable = runTimeCast<ExecutableNode>( nIt->get() ) )
{
executables.push_back( executable );
}
else if ( const Box *box = runTimeCast<const Box>( nIt->get() ) )
{
for ( RecursiveOutputPlugIterator plugIt( box ); plugIt != plugIt.end(); ++plugIt )
{
Node *sourceNode = plugIt->get()->source<Plug>()->node();
if ( ExecutableNode *executable = runTimeCast<ExecutableNode>( sourceNode ) )
{
executables.push_back( executable );
}
}
}
else
{
throw IECore::Exception( getName().string() + ": Dispatched nodes must be ExecutableNodes or Boxes containing ExecutableNodes." );
}
}
// create the job directory now, so it's available in preDispatchSignal().
const Context *context = Context::current();
m_jobDirectory = createJobDirectory( context );
// this object calls this->preDispatchSignal() in its constructor and this->postDispatchSignal()
// in its destructor, thereby guaranteeing that we always call this->postDispatchSignal().
DispatcherSignalGuard signalGuard( this, executables );
if ( signalGuard.cancelledByPreDispatch() )
{
return;
}
std::vector<FrameList::Frame> frames;
FrameListPtr frameList = frameRange( script, context );
frameList->asList( frames );
size_t i = 0;
ExecutableNode::Tasks tasks;
tasks.reserve( executables.size() * frames.size() );
for ( std::vector<FrameList::Frame>::const_iterator fIt = frames.begin(); fIt != frames.end(); ++fIt )
{
for ( std::vector<ExecutableNodePtr>::const_iterator nIt = executables.begin(); nIt != executables.end(); ++nIt, ++i )
{
ContextPtr frameContext = new Context( *context, Context::Borrowed );
frameContext->setFrame( *fIt );
tasks.push_back( ExecutableNode::Task( *nIt, frameContext ) );
}
}
TaskBatchPtr rootBatch = batchTasks( tasks );
if ( !rootBatch->requirements().empty() )
{
doDispatch( rootBatch.get() );
}
// inform the guard that the process has been completed, so it can pass this info to
// postDispatchSignal():
signalGuard.success();
}
void Dispatcher::dispatch( const std::vector<NodePtr> &nodes ) const
{
if ( nodes.empty() )
{
throw IECore::Exception( getName().string() + ": Must specify at least one node to dispatch." );
}
std::vector<ExecutableNodePtr> executables;
const ScriptNode *script = (*nodes.begin())->scriptNode();
for ( std::vector<NodePtr>::const_iterator nIt = nodes.begin(); nIt != nodes.end(); ++nIt )
{
const ScriptNode *currentScript = (*nIt)->scriptNode();
if ( !currentScript || currentScript != script )
{
throw IECore::Exception( getName().string() + ": Dispatched nodes must all belong to the same ScriptNode." );
}
if ( ExecutableNode *executable = runTimeCast<ExecutableNode>( nIt->get() ) )
{
executables.push_back( executable );
}
else if ( const Box *box = runTimeCast<const Box>( nIt->get() ) )
{
for ( RecursiveOutputPlugIterator plugIt( box ); plugIt != plugIt.end(); ++plugIt )
{
Node *sourceNode = plugIt->get()->source<Plug>()->node();
if ( ExecutableNode *executable = runTimeCast<ExecutableNode>( sourceNode ) )
{
executables.push_back( executable );
}
}
}
else
{
throw IECore::Exception( getName().string() + ": Dispatched nodes must be ExecutableNodes or Boxes containing ExecutableNodes." );
}
}
if ( preDispatchSignal()( this, executables ) )
{
/// \todo: communicate the cancellation to the user
return;
}
const Context *context = Context::current();
std::vector<FrameList::Frame> frames;
FrameListPtr frameList = frameRange( script, context );
frameList->asList( frames );
size_t i = 0;
ExecutableNode::Tasks tasks;
tasks.reserve( executables.size() * frames.size() );
for ( std::vector<FrameList::Frame>::const_iterator fIt = frames.begin(); fIt != frames.end(); ++fIt )
{
for ( std::vector<ExecutableNodePtr>::const_iterator nIt = executables.begin(); nIt != executables.end(); ++nIt, ++i )
{
ContextPtr frameContext = new Context( *context, Context::Borrowed );
frameContext->setFrame( *fIt );
tasks.push_back( ExecutableNode::Task( *nIt, frameContext ) );
}
}
TaskBatchPtr rootBatch = batchTasks( tasks );
if ( !rootBatch->requirements().empty() )
{
doDispatch( rootBatch.get() );
}
postDispatchSignal()( this, executables );
}