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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/service_worker/embedded_worker_instance.h"
#include "content/browser/service_worker/embedded_worker_registry.h"
#include "content/common/service_worker/embedded_worker_messages.h"
#include "ipc/ipc_message.h"
#include "url/gurl.h"
namespace content {
EmbeddedWorkerInstance::~EmbeddedWorkerInstance() {
registry_->RemoveWorker(process_id_, embedded_worker_id_);
}
ServiceWorkerStatusCode EmbeddedWorkerInstance::Start(
int64 service_worker_version_id,
const GURL& script_url) {
DCHECK(status_ == STOPPED);
if (!ChooseProcess())
return SERVICE_WORKER_ERROR_PROCESS_NOT_FOUND;
status_ = STARTING;
ServiceWorkerStatusCode status = registry_->StartWorker(
process_id_,
embedded_worker_id_,
service_worker_version_id,
script_url);
if (status != SERVICE_WORKER_OK) {
status_ = STOPPED;
process_id_ = -1;
}
return status;
}
ServiceWorkerStatusCode EmbeddedWorkerInstance::Stop() {
DCHECK(status_ == STARTING || status_ == RUNNING);
ServiceWorkerStatusCode status =
registry_->StopWorker(process_id_, embedded_worker_id_);
if (status == SERVICE_WORKER_OK)
status_ = STOPPING;
return status;
}
ServiceWorkerStatusCode EmbeddedWorkerInstance::SendMessage(
int request_id,
const IPC::Message& message) {
DCHECK(status_ == RUNNING);
return registry_->Send(process_id_,
new EmbeddedWorkerContextMsg_SendMessageToWorker(
thread_id_, embedded_worker_id_,
request_id, message));
}
void EmbeddedWorkerInstance::AddProcessReference(int process_id) {
ProcessRefMap::iterator found = process_refs_.find(process_id);
if (found == process_refs_.end())
found = process_refs_.insert(std::make_pair(process_id, 0)).first;
++found->second;
}
void EmbeddedWorkerInstance::ReleaseProcessReference(int process_id) {
ProcessRefMap::iterator found = process_refs_.find(process_id);
if (found == process_refs_.end()) {
NOTREACHED() << "Releasing unknown process ref " << process_id;
return;
}
if (--found->second == 0)
process_refs_.erase(found);
}
EmbeddedWorkerInstance::EmbeddedWorkerInstance(
EmbeddedWorkerRegistry* registry,
int embedded_worker_id)
: registry_(registry),
embedded_worker_id_(embedded_worker_id),
status_(STOPPED),
process_id_(-1),
thread_id_(-1) {
}
void EmbeddedWorkerInstance::OnStarted(int thread_id) {
// Stop is requested before OnStarted is sent back from the worker.
if (status_ == STOPPING)
return;
DCHECK(status_ == STARTING);
status_ = RUNNING;
thread_id_ = thread_id;
FOR_EACH_OBSERVER(Observer, observer_list_, OnStarted());
}
void EmbeddedWorkerInstance::OnStopped() {
status_ = STOPPED;
process_id_ = -1;
thread_id_ = -1;
FOR_EACH_OBSERVER(Observer, observer_list_, OnStopped());
}
void EmbeddedWorkerInstance::OnMessageReceived(int request_id,
const IPC::Message& message) {
FOR_EACH_OBSERVER(Observer, observer_list_,
OnMessageReceived(request_id, message));
}
void EmbeddedWorkerInstance::AddObserver(Observer* observer) {
observer_list_.AddObserver(observer);
}
void EmbeddedWorkerInstance::RemoveObserver(Observer* observer) {
observer_list_.RemoveObserver(observer);
}
bool EmbeddedWorkerInstance::ChooseProcess() {
DCHECK_EQ(-1, process_id_);
// Naive implementation; chooses a process which has the biggest number of
// associated providers (so that hopefully likely live longer).
ProcessRefMap::iterator max_ref_iter = process_refs_.end();
for (ProcessRefMap::iterator iter = process_refs_.begin();
iter != process_refs_.end(); ++iter) {
if (max_ref_iter == process_refs_.end() ||
max_ref_iter->second < iter->second)
max_ref_iter = iter;
}
if (max_ref_iter == process_refs_.end())
return false;
process_id_ = max_ref_iter->first;
return true;
}
} // namespace content
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