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// Copyright 2014 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.
#ifndef MOJO_SERVICE_MANAGER_BACKGROUND_SERVICE_LOADER_H_
#define MOJO_SERVICE_MANAGER_BACKGROUND_SERVICE_LOADER_H_
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_loop.h"
#include "base/threading/thread.h"
#include "mojo/service_manager/service_loader.h"
namespace mojo {
class ServiceManager;
// ServiceLoader implementation that creates a background thread and issues load
// requests there.
class MOJO_SERVICE_MANAGER_EXPORT BackgroundServiceLoader
: public ServiceLoader {
public:
BackgroundServiceLoader(scoped_ptr<ServiceLoader> real_loader,
const char* thread_name,
base::MessageLoop::Type message_loop_type);
virtual ~BackgroundServiceLoader();
// ServiceLoader overrides:
virtual void LoadService(ServiceManager* manager,
const GURL& url,
ScopedMessagePipeHandle shell_handle) OVERRIDE;
virtual void OnServiceError(ServiceManager* manager,
const GURL& url) OVERRIDE;
private:
class BackgroundLoader;
// These functions are exected on the background thread. They call through
// to |background_loader_| to do the actual loading.
// TODO: having this code take a |manager| is fragile (as ServiceManager isn't
// thread safe).
void LoadServiceOnBackgroundThread(
ServiceManager* manager,
const GURL& url,
ScopedMessagePipeHandle* shell_handle);
void OnServiceErrorOnBackgroundThread(ServiceManager* manager,
const GURL& url);
void ShutdownOnBackgroundThread();
scoped_ptr<ServiceLoader> loader_;
base::Thread thread_;
base::MessageLoop::Type message_loop_type_;
// Lives on |thread_|. Trivial interface that calls through to |loader_|.
BackgroundLoader* background_loader_;
DISALLOW_COPY_AND_ASSIGN(BackgroundServiceLoader);
};
} // namespace mojo
#endif // MOJO_SERVICE_MANAGER_BACKGROUND_SERVICE_LOADER_H_
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