plasma-framework/runnermanager.cpp
Aaron J. Seigo df3892d06d avoid loading runners if the query is empty
svn path=/trunk/KDE/kdelibs/; revision=1029903
2009-10-01 00:58:24 +00:00

530 lines
15 KiB
C++

/*
* Copyright (C) 2006 Aaron Seigo <aseigo@kde.org>
* Copyright (C) 2007, 2009 Ryan P. Bitanga <ryan.bitanga@gmail.com>
* Copyright (C) 2008 Jordi Polo <mumismo@gmail.com>
*
* This program 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, or
* (at your option) any later version.
*
* 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 Library 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 "runnermanager.h"
#include <QMutex>
#include <QTimer>
#include <QCoreApplication>
#include <kdebug.h>
#include <kplugininfo.h>
#include <kservicetypetrader.h>
#include <kstandarddirs.h>
#include <solid/device.h>
#include <solid/deviceinterface.h>
#include <Weaver/DebuggingAids.h>
#include <Weaver/Thread.h>
#include <Weaver/ThreadWeaver.h>
#include "private/runnerjobs.h"
#include "querymatch.h"
using ThreadWeaver::Weaver;
using ThreadWeaver::Job;
namespace Plasma
{
/*****************************************************
* RunnerManager::Private class
*
*****************************************************/
class RunnerManagerPrivate
{
public:
RunnerManagerPrivate(RunnerManager *parent)
: q(parent),
deferredRun(0),
prepped(false),
teardownRequested(false)
{
matchChangeTimer.setSingleShot(true);
delayTimer.setSingleShot(true);
QObject::connect(&matchChangeTimer, SIGNAL(timeout()), q, SLOT(matchesChanged()));
QObject::connect(&context, SIGNAL(matchesChanged()), q, SLOT(scheduleMatchesChanged()));
QObject::connect(&delayTimer, SIGNAL(timeout()), q, SLOT(unblockJobs()));
}
~RunnerManagerPrivate()
{
KConfigGroup config = configGroup();
context.save(config);
}
void scheduleMatchesChanged()
{
matchChangeTimer.start(50);
}
void matchesChanged()
{
emit q->matchesChanged(context.matches());
}
void loadConfiguration()
{
KConfigGroup config = configGroup();
//The number of threads used scales with the number of processors.
const int numProcs =
qMax(Solid::Device::listFromType(Solid::DeviceInterface::Processor).count(), 1);
//This entry allows to define a hard upper limit independent of the number of processors.
const int maxThreads = config.readEntry("maxThreads", 16);
const int numThreads = qMin(maxThreads, 2 + ((numProcs - 1) * 2));
//kDebug() << "setting up" << numThreads << "threads for" << numProcs << "processors";
if (numThreads > Weaver::instance()->maximumNumberOfThreads()) {
Weaver::instance()->setMaximumNumberOfThreads(numThreads);
}
// Limit the number of instances of a single normal speed runner and all of the slow runners
// to half the number of threads
const int cap = qMax(2, numThreads/2);
DefaultRunnerPolicy::instance().setCap(cap);
context.restore(config);
}
KConfigGroup configGroup()
{
return conf.isValid() ? conf : KConfigGroup(KGlobal::config(), "PlasmaRunnerManager");
}
void loadRunners()
{
KConfigGroup config = configGroup();
KService::List offers = KServiceTypeTrader::self()->query("Plasma/Runner");
bool loadAll = config.readEntry("loadAll", false);
QStringList whiteList = config.readEntry("pluginWhiteList", QStringList());
KConfigGroup pluginConf(&config, "Plugins");
foreach (const KService::Ptr &service, offers) {
//kDebug() << "Loading runner: " << service->name() << service->storageId();
QString tryExec = service->property("TryExec", QVariant::String).toString();
//kDebug() << "TryExec is" << tryExec;
if (!tryExec.isEmpty() && KStandardDirs::findExe(tryExec).isEmpty()) {
// we don't actually have this application!
continue;
}
KPluginInfo description(service);
QString runnerName = description.pluginName();
description.load(pluginConf);
bool loaded = runners.contains(runnerName);
bool selected = loadAll ||
description.isPluginEnabled() && (whiteList.isEmpty() || whiteList.contains(runnerName));
if (selected) {
if (!loaded) {
QString api = service->property("X-Plasma-API").toString();
QString error;
AbstractRunner *runner = 0;
if (api.isEmpty()) {
QVariantList args;
args << service->storageId();
if (Plasma::isPluginVersionCompatible(KPluginLoader(*service).pluginVersion())) {
runner = service->createInstance<AbstractRunner>(q, args, &error);
}
} else {
//kDebug() << "got a script runner known as" << api;
runner = new AbstractRunner(q, service->storageId());
}
if (runner) {
kDebug() << "================= loading runner:" << service->name() << "=================";
/*
foreach (const RunnerSyntax &syntax, runner->syntaxes()) {
kDebug() << syntax.exampleQueriesWithTermDescription().join(", ") << " ==> " << syntax.description();
}
*/
runners.insert(runnerName, runner);
} else {
kDebug() << "failed to load runner:" << service->name()
<< ". error reported:" << error;
}
}
} else if (loaded) {
//Remove runner
AbstractRunner *runner = runners.take(runnerName);
kDebug() << "Removing runner: " << runnerName;
delete runner;
}
}
kDebug() << "All runners loaded, total:" << runners.count();
}
void jobDone(ThreadWeaver::Job *job)
{
FindMatchesJob *runJob = dynamic_cast<FindMatchesJob *>(job);
if (!runJob) {
return;
}
if (deferredRun.isEnabled() && runJob->runner() == deferredRun.runner()) {
//kDebug() << "job actually done, running now **************";
QueryMatch tmpRun = deferredRun;
deferredRun = QueryMatch(0);
tmpRun.run(context);
}
searchJobs.remove(runJob);
oldSearchJobs.remove(runJob);
delete runJob;
if (searchJobs.isEmpty() && context.matches().isEmpty()) {
// we finished our run, and there are no valid matches, and so no
// signal will have been sent out. so we need to emit the signal
// ourselves here
emit q->matchesChanged(context.matches());
}
checkTearDown();
}
void checkTearDown()
{
//kDebug() << prepped << teardownRequested << searchJobs.count() << oldSearchJobs.count();
if (!prepped || !teardownRequested) {
return;
}
if (searchJobs.isEmpty() && oldSearchJobs.isEmpty()) {
foreach (AbstractRunner *runner, runners) {
emit runner->teardown();
}
prepped = false;
teardownRequested = false;
}
}
void unblockJobs()
{
// WORKAROUND: Queue an empty job to force ThreadWeaver to awaken threads
// kDebug() << "- Unblocking jobs -" << endl;
DummyJob *dummy = new DummyJob(q);
Weaver::instance()->enqueue(dummy);
QObject::connect(dummy, SIGNAL(done(ThreadWeaver::Job*)), dummy, SLOT(deleteLater()));
}
// Delay in ms before slow runners are allowed to run
static const int slowRunDelay = 400;
RunnerManager *q;
QueryMatch deferredRun;
RunnerContext context;
QTimer matchChangeTimer;
QTimer delayTimer; // Timer to control when to run slow runners
QHash<QString, AbstractRunner*> runners;
QSet<FindMatchesJob*> searchJobs;
QSet<FindMatchesJob*> oldSearchJobs;
KConfigGroup conf;
bool loadAll : 1;
bool prepped : 1;
bool teardownRequested : 1;
};
/*****************************************************
* RunnerManager::Public class
*
*****************************************************/
RunnerManager::RunnerManager(QObject *parent)
: QObject(parent),
d(new RunnerManagerPrivate(this))
{
d->loadConfiguration();
//ThreadWeaver::setDebugLevel(true, 4);
}
RunnerManager::RunnerManager(KConfigGroup &c, QObject *parent)
: QObject(parent),
d(new RunnerManagerPrivate(this))
{
// Should this be really needed? Maybe d->loadConfiguration(c) would make
// more sense.
d->conf = KConfigGroup(&c, "PlasmaRunnerManager");
d->loadConfiguration();
//ThreadWeaver::setDebugLevel(true, 4);
}
RunnerManager::~RunnerManager()
{
if (!qApp->closingDown() && (!d->searchJobs.isEmpty() || !d->oldSearchJobs.isEmpty())) {
new DelayedJobCleaner(d->searchJobs + d->oldSearchJobs, Weaver::instance());
}
delete d;
}
void RunnerManager::reloadConfiguration()
{
d->loadConfiguration();
d->loadRunners();
}
void RunnerManager::setAllowedRunners(const QStringList &runners)
{
qDeleteAll(d->runners);
d->runners.clear();
KConfigGroup config = d->configGroup();
config.writeEntry("pluginWhiteList", runners);
}
QStringList RunnerManager::allowedRunners() const
{
KConfigGroup config = d->configGroup();
return config.readEntry("pluginWhiteList", QStringList());
}
AbstractRunner* RunnerManager::runner(const QString &name) const
{
if (d->runners.isEmpty()) {
d->loadRunners();
}
return d->runners.value(name, 0);
}
QList<AbstractRunner *> RunnerManager::runners() const
{
return d->runners.values();
}
RunnerContext* RunnerManager::searchContext() const
{
return &d->context;
}
//Reordering is here so data is not reordered till strictly needed
QList<QueryMatch> RunnerManager::matches() const
{
return d->context.matches();
}
void RunnerManager::run(const QString &id)
{
run(d->context.match(id));
}
void RunnerManager::run(const QueryMatch &match)
{
if (!match.isEnabled()) {
return;
}
//TODO: this function is not const as it may be used for learning
AbstractRunner *runner = match.runner();
foreach (FindMatchesJob *job, d->searchJobs) {
if (job->runner() == runner && !job->isFinished()) {
kDebug() << "deferred run";
d->deferredRun = match;
return;
}
}
if (d->deferredRun.isValid()) {
d->deferredRun = QueryMatch(0);
}
d->context.run(match);
}
QList<QAction*> RunnerManager::actionsForMatch(const QueryMatch &match)
{
AbstractRunner *runner = match.runner();
if (runner) {
return runner->actionsForMatch(match);
}
return QList<QAction*>();
}
void RunnerManager::setupMatchSession()
{
d->teardownRequested = false;
if (d->prepped) {
return;
}
d->prepped = true;
foreach (AbstractRunner *runner, d->runners) {
emit runner->prepare();
}
}
void RunnerManager::matchSessionComplete()
{
if (!d->prepped) {
return;
}
d->teardownRequested = true;
d->checkTearDown();
}
void RunnerManager::launchQuery(const QString &term)
{
launchQuery(term, QString());
}
void RunnerManager::launchQuery(const QString &untrimmedTerm, const QString &runnerName)
{
setupMatchSession();
QString term = untrimmedTerm.trimmed();
if (term.isEmpty()) {
reset();
return;
}
if (d->runners.isEmpty()) {
d->loadRunners();
}
if (d->context.query() == term) {
// we already are searching for this!
return;
}
reset();
// kDebug() << "runners searching for" << term << "on" << runnerName;
d->context.setQuery(term);
AbstractRunner::List runable;
//if the name is not empty we will launch only the specified runner
if (!runnerName.isEmpty()) {
AbstractRunner *r = runner(runnerName);
if (r) {
runable.append(r);
}
} else {
runable = d->runners.values();
}
foreach (Plasma::AbstractRunner *r, runable) {
if ((r->ignoredTypes() & d->context.type()) == 0) {
// kDebug() << "launching" << r->name();
FindMatchesJob *job = new FindMatchesJob(r, &d->context, Weaver::instance());
connect(job, SIGNAL(done(ThreadWeaver::Job*)), this, SLOT(jobDone(ThreadWeaver::Job*)));
if (r->speed() == AbstractRunner::SlowSpeed) {
job->setDelayTimer(&d->delayTimer);
}
Weaver::instance()->enqueue(job);
d->searchJobs.insert(job);
}
}
// Start timer to unblock slow runners
d->delayTimer.start(RunnerManagerPrivate::slowRunDelay);
}
bool RunnerManager::execQuery(const QString &term)
{
return execQuery(term, QString());
}
bool RunnerManager::execQuery(const QString &untrimmedTerm, const QString &runnerName)
{
QString term = untrimmedTerm.trimmed();
if (term.isEmpty()) {
reset();
return false;
}
if (d->runners.isEmpty()) {
d->loadRunners();
}
if (d->context.query() == term) {
// we already are searching for this!
emit matchesChanged(d->context.matches());
return false;
}
reset();
//kDebug() << "executing query about " << term << "on" << runnerName;
d->context.setQuery(term);
AbstractRunner *r = runner(runnerName);
if (!r) {
//kDebug() << "failed to find the runner";
return false;
}
if ((r->ignoredTypes() & d->context.type()) != 0) {
//kDebug() << "ignored!";
return false;
}
r->performMatch(d->context);
//kDebug() << "succeeded with" << d->context.matches().count() << "results";
emit matchesChanged(d->context.matches());
return true;
}
QString RunnerManager::query() const
{
return d->context.query();
}
void RunnerManager::reset()
{
// If ThreadWeaver is idle, it is safe to clear previous jobs
if (Weaver::instance()->isIdle()) {
qDeleteAll(d->searchJobs);
qDeleteAll(d->oldSearchJobs);
d->oldSearchJobs.clear();
} else {
Weaver::instance()->dequeue();
d->oldSearchJobs += d->searchJobs;
}
d->searchJobs.clear();
if (d->deferredRun.isEnabled()) {
//kDebug() << "job actually done, running now **************";
QueryMatch tmpRun = d->deferredRun;
d->deferredRun = QueryMatch(0);
tmpRun.run(d->context);
}
d->context.reset();
}
} // Plasma namespace
#include "runnermanager.moc"