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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 COMPONENTS_FEEDBACK_FEEDBACK_UPLOADER_H_
#define COMPONENTS_FEEDBACK_FEEDBACK_UPLOADER_H_
#include <queue>
#include <string>
#include "base/basictypes.h"
#include "base/files/file_util.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/sequenced_worker_pool.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
namespace feedback {
typedef base::Callback<void(const std::string&)> ReportDataCallback;
class FeedbackReport;
// FeedbackUploader is used to add a feedback report to the queue of reports
// being uploaded. In case uploading a report fails, it is written to disk and
// tried again when it's turn comes up next in the queue.
class FeedbackUploader : public base::SupportsWeakPtr<FeedbackUploader> {
public:
FeedbackUploader(const base::FilePath& path,
base::SequencedWorkerPool* pool);
FeedbackUploader(const base::FilePath& path,
base::SequencedWorkerPool* pool,
const std::string& url);
virtual ~FeedbackUploader();
// Queues a report for uploading.
virtual void QueueReport(const std::string& data);
base::FilePath GetFeedbackReportsPath() { return report_path_; }
bool QueueEmpty() const { return reports_queue_.empty(); }
protected:
friend class FeedbackUploaderTest;
struct ReportsUploadTimeComparator {
bool operator()(const scoped_refptr<FeedbackReport>& a,
const scoped_refptr<FeedbackReport>& b) const;
};
void Init();
// Dispatches the report to be uploaded.
virtual void DispatchReport(const std::string& data) = 0;
// Update our timer for uploading the next report.
void UpdateUploadTimer();
// Requeue this report with a delay.
void RetryReport(const std::string& data);
void QueueReportWithDelay(const std::string& data, base::TimeDelta delay);
void setup_for_test(const ReportDataCallback& dispatch_callback,
const base::TimeDelta& retry_delay);
base::FilePath report_path_;
// Timer to upload the next report at.
base::OneShotTimer<FeedbackUploader> upload_timer_;
// Priority queue of reports prioritized by the time the report is supposed
// to be uploaded at.
std::priority_queue<scoped_refptr<FeedbackReport>,
std::vector<scoped_refptr<FeedbackReport> >,
ReportsUploadTimeComparator> reports_queue_;
ReportDataCallback dispatch_callback_;
base::TimeDelta retry_delay_;
std::string url_;
base::SequencedWorkerPool* pool_;
DISALLOW_COPY_AND_ASSIGN(FeedbackUploader);
};
} // namespace feedback
#endif // COMPONENTS_FEEDBACK_FEEDBACK_UPLOADER_H_
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