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cef/libcef/browser_appcache_system.cc

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// Copyright (c) 2009 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 "browser_appcache_system.h"
#include "base/lock.h"
#include "base/task.h"
#include "base/waitable_event.h"
#include "webkit/appcache/appcache_interceptor.h"
#include "webkit/appcache/web_application_cache_host_impl.h"
#include "browser_resource_loader_bridge.h"
using WebKit::WebApplicationCacheHost;
using WebKit::WebApplicationCacheHostClient;
using appcache::WebApplicationCacheHostImpl;
using appcache::AppCacheBackendImpl;
using appcache::AppCacheInterceptor;
// BrowserFrontendProxy --------------------------------------------------------
// Proxies method calls from the backend IO thread to the frontend UI thread.
class BrowserFrontendProxy
: public base::RefCountedThreadSafe<BrowserFrontendProxy>,
public appcache::AppCacheFrontend {
public:
explicit BrowserFrontendProxy(BrowserAppCacheSystem* appcache_system)
: system_(appcache_system) {
}
void clear_appcache_system() { system_ = NULL; }
virtual void OnCacheSelected(int host_id, int64 cache_id ,
appcache::Status status) {
if (!system_)
return;
if (system_->is_io_thread())
system_->ui_message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
this, &BrowserFrontendProxy::OnCacheSelected,
host_id, cache_id, status));
else if (system_->is_ui_thread())
system_->frontend_impl_.OnCacheSelected(host_id, cache_id, status);
else
NOTREACHED();
}
virtual void OnStatusChanged(const std::vector<int>& host_ids,
appcache::Status status) {
if (!system_)
return;
if (system_->is_io_thread())
system_->ui_message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
this, &BrowserFrontendProxy::OnStatusChanged, host_ids, status));
else if (system_->is_ui_thread())
system_->frontend_impl_.OnStatusChanged(host_ids, status);
else
NOTREACHED();
}
virtual void OnEventRaised(const std::vector<int>& host_ids,
appcache::EventID event_id) {
if (!system_)
return;
if (system_->is_io_thread())
system_->ui_message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
this, &BrowserFrontendProxy::OnEventRaised, host_ids, event_id));
else if (system_->is_ui_thread())
system_->frontend_impl_.OnEventRaised(host_ids, event_id);
else
NOTREACHED();
}
private:
BrowserAppCacheSystem* system_;
};
// BrowserBackendProxy --------------------------------------------------------
// Proxies method calls from the frontend UI thread to the backend IO thread.
class BrowserBackendProxy
: public base::RefCountedThreadSafe<BrowserBackendProxy>,
public appcache::AppCacheBackend {
public:
explicit BrowserBackendProxy(BrowserAppCacheSystem* appcache_system)
: system_(appcache_system), event_(true, false) {
get_status_callback_.reset(
NewCallback(this, &BrowserBackendProxy::GetStatusCallback));
start_update_callback_.reset(
NewCallback(this, &BrowserBackendProxy::StartUpdateCallback));
swap_cache_callback_.reset(
NewCallback(this, &BrowserBackendProxy::SwapCacheCallback));
}
virtual void RegisterHost(int host_id) {
if (system_->is_ui_thread()) {
system_->io_message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
this, &BrowserBackendProxy::RegisterHost, host_id));
} else if (system_->is_io_thread()) {
system_->backend_impl_->RegisterHost(host_id);
} else {
NOTREACHED();
}
}
virtual void UnregisterHost(int host_id) {
if (system_->is_ui_thread()) {
system_->io_message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
this, &BrowserBackendProxy::UnregisterHost, host_id));
} else if (system_->is_io_thread()) {
system_->backend_impl_->UnregisterHost(host_id);
} else {
NOTREACHED();
}
}
virtual void SelectCache(int host_id,
const GURL& document_url,
const int64 cache_document_was_loaded_from,
const GURL& manifest_url) {
if (system_->is_ui_thread()) {
system_->io_message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
this, &BrowserBackendProxy::SelectCache, host_id, document_url,
cache_document_was_loaded_from, manifest_url));
} else if (system_->is_io_thread()) {
system_->backend_impl_->SelectCache(host_id, document_url,
cache_document_was_loaded_from,
manifest_url);
} else {
NOTREACHED();
}
}
virtual void MarkAsForeignEntry(int host_id, const GURL& document_url,
int64 cache_document_was_loaded_from) {
if (system_->is_ui_thread()) {
system_->io_message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
this, &BrowserBackendProxy::MarkAsForeignEntry, host_id, document_url,
cache_document_was_loaded_from));
} else if (system_->is_io_thread()) {
system_->backend_impl_->MarkAsForeignEntry(
host_id, document_url,
cache_document_was_loaded_from);
} else {
NOTREACHED();
}
}
virtual appcache::Status GetStatus(int host_id) {
if (system_->is_ui_thread()) {
status_result_ = appcache::UNCACHED;
event_.Reset();
system_->io_message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
this, &BrowserBackendProxy::GetStatus, host_id));
event_.Wait();
} else if (system_->is_io_thread()) {
system_->backend_impl_->GetStatusWithCallback(
host_id, get_status_callback_.get(), NULL);
} else {
NOTREACHED();
}
return status_result_;
}
virtual bool StartUpdate(int host_id) {
if (system_->is_ui_thread()) {
bool_result_ = false;
event_.Reset();
system_->io_message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
this, &BrowserBackendProxy::StartUpdate, host_id));
event_.Wait();
} else if (system_->is_io_thread()) {
system_->backend_impl_->StartUpdateWithCallback(
host_id, start_update_callback_.get(), NULL);
} else {
NOTREACHED();
}
return bool_result_;
}
virtual bool SwapCache(int host_id) {
if (system_->is_ui_thread()) {
bool_result_ = false;
event_.Reset();
system_->io_message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
this, &BrowserBackendProxy::SwapCache, host_id));
event_.Wait();
} else if (system_->is_io_thread()) {
system_->backend_impl_->SwapCacheWithCallback(
host_id, swap_cache_callback_.get(), NULL);
} else {
NOTREACHED();
}
return bool_result_;
}
void GetStatusCallback(appcache::Status status, void* param) {
status_result_ = status;
event_.Signal();
}
void StartUpdateCallback(bool result, void* param) {
bool_result_ = result;
event_.Signal();
}
void SwapCacheCallback(bool result, void* param) {
bool_result_ = result;
event_.Signal();
}
void SignalEvent() {
event_.Signal();
}
private:
BrowserAppCacheSystem* system_;
base::WaitableEvent event_;
bool bool_result_;
appcache::Status status_result_;
scoped_ptr<appcache::GetStatusCallback> get_status_callback_;
scoped_ptr<appcache::StartUpdateCallback> start_update_callback_;
scoped_ptr<appcache::SwapCacheCallback> swap_cache_callback_;
};
// BrowserAppCacheSystem --------------------------------------------------------
// This class only works for a single process browser.
static const int kSingleProcessId = 1;
// A not so thread safe singleton, but should work for test_shell.
BrowserAppCacheSystem* BrowserAppCacheSystem::instance_ = NULL;
BrowserAppCacheSystem::BrowserAppCacheSystem()
: io_message_loop_(NULL), ui_message_loop_(NULL),
ALLOW_THIS_IN_INITIALIZER_LIST(
backend_proxy_(new BrowserBackendProxy(this))),
ALLOW_THIS_IN_INITIALIZER_LIST(
frontend_proxy_(new BrowserFrontendProxy(this))),
backend_impl_(NULL), service_(NULL) {
DCHECK(!instance_);
instance_ = this;
}
BrowserAppCacheSystem::~BrowserAppCacheSystem() {
DCHECK(!io_message_loop_ && !backend_impl_ && !service_);
frontend_proxy_->clear_appcache_system(); // in case a task is in transit
instance_ = NULL;
}
void BrowserAppCacheSystem::InitOnUIThread(
const FilePath& cache_directory) {
DCHECK(!ui_message_loop_);
DCHECK(!cache_directory.empty());
ui_message_loop_ = MessageLoop::current();
cache_directory_ = cache_directory;
}
void BrowserAppCacheSystem::InitOnIOThread(URLRequestContext* request_context) {
if (!is_initailized_on_ui_thread())
return;
DCHECK(!io_message_loop_);
io_message_loop_ = MessageLoop::current();
io_message_loop_->AddDestructionObserver(this);
// Recreate and initialize per each IO thread.
service_ = new appcache::AppCacheService();
backend_impl_ = new appcache::AppCacheBackendImpl();
service_->Initialize(cache_directory_);
service_->set_request_context(request_context);
backend_impl_->Initialize(service_, frontend_proxy_.get(), kSingleProcessId);
AppCacheInterceptor::EnsureRegistered();
}
WebApplicationCacheHost* BrowserAppCacheSystem::CreateCacheHostForWebKit(
WebApplicationCacheHostClient* client) {
if (!is_initailized_on_ui_thread())
return NULL;
DCHECK(is_ui_thread());
// The IO thread needs to be running for this system to work.
BrowserResourceLoaderBridge::EnsureIOThread();
if (!is_initialized())
return NULL;
return new WebApplicationCacheHostImpl(client, backend_proxy_.get());
}
void BrowserAppCacheSystem::SetExtraRequestBits(
URLRequest* request, int host_id, ResourceType::Type resource_type) {
if (is_initialized()) {
DCHECK(is_io_thread());
AppCacheInterceptor::SetExtraRequestInfo(
request, service_, kSingleProcessId, host_id, resource_type);
}
}
void BrowserAppCacheSystem::GetExtraResponseBits(
URLRequest* request, int64* cache_id, GURL* manifest_url) {
if (is_initialized()) {
DCHECK(is_io_thread());
AppCacheInterceptor::GetExtraResponseInfo(
request, cache_id, manifest_url);
}
}
void BrowserAppCacheSystem::WillDestroyCurrentMessageLoop() {
DCHECK(is_io_thread());
DCHECK(backend_impl_->hosts().empty());
io_message_loop_ = NULL;
delete backend_impl_;
delete service_;
backend_impl_ = NULL;
service_ = NULL;
// Just in case the main thread is waiting on it.
backend_proxy_->SignalEvent();
}
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