ApplicationV8::V8Context* ApplicationV8::enterContext () {
CONDITION_LOCKER(guard, _contextCondition);
while (_freeContexts.empty() && ! _stopping) {
LOGGER_DEBUG("waiting for unused V8 context");
guard.wait();
}
// in case we are in the shutdown phase, do not enter a context!
// the context might have been deleted by the shutdown
if (_stopping) {
return 0;
}
LOGGER_TRACE("found unused V8 context");
V8Context* context = _freeContexts.back();
assert(context != 0);
assert(context->_isolate != 0);
_freeContexts.pop_back();
_busyContexts.insert(context);
context->_locker = new v8::Locker(context->_isolate);
context->_isolate->Enter();
context->_context->Enter();
context->handleGlobalContextMethods();
return context;
}
ApplicationV8::V8Context* ApplicationV8::enterContext (TRI_vocbase_s* vocbase,
triagens::rest::HttpRequest* request,
bool initialise,
bool allowUseDatabase) {
CONDITION_LOCKER(guard, _contextCondition);
while (_freeContexts.empty() && ! _stopping) {
LOG_DEBUG("waiting for unused V8 context");
guard.wait();
}
// in case we are in the shutdown phase, do not enter a context!
// the context might have been deleted by the shutdown
if (_stopping) {
return 0;
}
LOG_TRACE("found unused V8 context");
V8Context* context = _freeContexts.back();
assert(context != 0);
assert(context->_isolate != 0);
_freeContexts.pop_back();
_busyContexts.insert(context);
context->_locker = new v8::Locker(context->_isolate);
context->_isolate->Enter();
context->_context->Enter();
// set the current database
v8::HandleScope scope;
TRI_v8_global_t* v8g = (TRI_v8_global_t*) context->_isolate->GetData();
v8g->_vocbase = vocbase;
v8g->_allowUseDatabase = allowUseDatabase;
LOG_TRACE("entering V8 context %d", (int) context->_id);
context->handleGlobalContextMethods();
if (_developmentMode && ! initialise) {
v8::HandleScope scope;
TRI_ExecuteJavaScriptString(context->_context,
v8::String::New("require(\"internal\").resetEngine()"),
v8::String::New("global context method"),
false);
}
return context;
}
void ApplicationV8::addGlobalContextMethod (string const& method) {
CONDITION_LOCKER(guard, _contextCondition);
for (vector<V8Context*>::iterator i = _freeContexts.begin(); i != _freeContexts.end(); ++i) {
V8Context* context = *i;
context->addGlobalContextMethod(method);
}
for (vector<V8Context*>::iterator i = _dirtyContexts.begin(); i != _dirtyContexts.end(); ++i) {
V8Context* context = *i;
context->addGlobalContextMethod(method);
}
for (set<V8Context*>::iterator i = _busyContexts.begin(); i != _busyContexts.end(); ++i) {
V8Context* context = *i;
context->addGlobalContextMethod(method);
}
}
ApplicationV8::V8Context* ApplicationV8::enterContext (std::string const& name,
TRI_vocbase_t* vocbase,
bool allowUseDatabase) {
CONDITION_LOCKER(guard, _contextCondition);
while (_freeContexts[name].empty() && ! _stopping) {
LOG_DEBUG("waiting for unused V8 context");
auto currentThread = triagens::rest::DispatcherThread::currentDispatcherThread;
if (currentThread != nullptr) {
triagens::rest::DispatcherThread::currentDispatcherThread->blockThread();
}
guard.wait();
if (currentThread != nullptr) {
triagens::rest::DispatcherThread::currentDispatcherThread->unblockThread();
}
}
// in case we are in the shutdown phase, do not enter a context!
// the context might have been deleted by the shutdown
if (_stopping) {
return nullptr;
}
LOG_TRACE("found unused V8 context");
TRI_ASSERT(! _freeContexts[name].empty());
V8Context* context = _freeContexts[name].back();
TRI_ASSERT(context != nullptr);
auto isolate = context->isolate;
TRI_ASSERT(isolate != nullptr);
_freeContexts[name].pop_back();
_busyContexts[name].insert(context);
context->_locker = new v8::Locker(isolate);
context->isolate->Enter();
v8::HandleScope scope(isolate);
auto localContext = v8::Local<v8::Context>::New(isolate, context->_context);
localContext->Enter();
{
v8::Context::Scope contextScope(localContext);
TRI_ASSERT(context->_locker->IsLocked(isolate));
TRI_ASSERT(v8::Locker::IsLocked(isolate));
TRI_GET_GLOBALS();
// initialize the context data
v8g->_query = nullptr;
v8g->_vocbase = vocbase;
v8g->_allowUseDatabase = allowUseDatabase;
TRI_UseVocBase(vocbase);
LOG_TRACE("entering V8 context %d", (int) context->_id);
context->handleGlobalContextMethods();
}
return context;
}
