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// Copyright (c) 2012 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 CHROME_BROWSER_GOOGLE_APIS_OPERATION_RUNNER_H_
#define CHROME_BROWSER_GOOGLE_APIS_OPERATION_RUNNER_H_
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/google_apis/gdata_errorcode.h"
class Profile;
namespace net {
class URLRequestContextGetter;
}
namespace google_apis {
class AuthenticatedOperationInterface;
class AuthService;
class OperationRegistry;
// Helper class that runs AuthenticatedOperationInterface objects, handling
// retries and authentication.
class OperationRunner {
public:
// |url_request_context_getter| is used to perform authentication with
// AuthService.
//
// |scopes| specifies OAuth2 scopes.
//
// |custom_user_agent| will be used for the User-Agent header in HTTP
// requests issued through the operation runner if the value is not empty.
OperationRunner(Profile* profile,
net::URLRequestContextGetter* url_request_context_getter,
const std::vector<std::string>& scopes,
const std::string& custom_user_agent);
virtual ~OperationRunner();
AuthService* auth_service() { return auth_service_.get(); }
OperationRegistry* operation_registry() {
return operation_registry_.get();
}
// Prepares the object for use.
virtual void Initialize();
// Cancels all in-flight operations.
void CancelAll();
// Starts an operation implementing the AuthenticatedOperationInterface
// interface, and makes the operation retry upon authentication failures by
// calling back to RetryOperation.
void StartOperationWithRetry(AuthenticatedOperationInterface* operation);
private:
// Called when the access token is fetched.
void OnAccessTokenFetched(
const base::WeakPtr<AuthenticatedOperationInterface>& operation,
GDataErrorCode error,
const std::string& access_token);
// Clears any authentication token and retries the operation, which forces
// an authentication token refresh.
void RetryOperation(AuthenticatedOperationInterface* operation);
Profile* profile_; // Not owned.
scoped_ptr<AuthService> auth_service_;
scoped_ptr<OperationRegistry> operation_registry_;
const std::string custom_user_agent_;
// Note: This should remain the last member so it'll be destroyed and
// invalidate its weak pointers before any other members are destroyed.
base::WeakPtrFactory<OperationRunner> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(OperationRunner);
};
} // namespace google_apis
#endif // CHROME_BROWSER_GOOGLE_APIS_OPERATION_RUNNER_H_
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