Added system log uploader.

chrome/browser/chromeos/policy/system_log_uploader.h

+// Copyright (c) 2015 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_CHROMEOS_POLICY_SYSTEM_LOG_UPLOADER_H_
+#define CHROME_BROWSER_CHROMEOS_POLICY_SYSTEM_LOG_UPLOADER_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/ref_counted_memory.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/time/time.h"
+#include "chrome/browser/chromeos/policy/system_log_upload_job.h"
+
+namespace base {
+class SequencedTaskRunner;
+}
+
+namespace policy {
+
+// Class responsible for periodically uploading system logs.
+class SystemLogUploader {
+ public:
+  explicit SystemLogUploader(
+      const scoped_refptr<base::SequencedTaskRunner>& task_runner);
+
+  virtual ~SystemLogUploader();
+
+  // Returns the time of the last upload attempt, or Time(0) if no upload has
+  // ever happened.
+  base::Time last_upload_attempt() const { return last_upload_attempt_; }
+
+ private:
+  // Creates the system log upload job during every scheduled log upload,
+  // that invokes |succeeded_callabck| or |failed_callback| according to the
+  // server response on the system log upload.
+  virtual SystemLogUploadJob* CreateSystemLogUploadJob(
+      const base::Closure& succeeded_callback,
+      const base::Closure& failed_callback);
+
+  // Callbacks handle success and failure results of upload, destroy the upload
+  // job.
+  void OnSuccess();
+  void OnFailure();
+
+  // Starts upload system logs, creates upload job.
+  void StartLogUpload();
+
+  // Helper method that figures out when the next system log upload should
+  // be scheduled.
+  void ScheduleNextSystemLogUpload(base::TimeDelta frequency);
+
+  // The number of consequent retries after the failed uploads.
+  int retry_count_;
+
+  // How long to wait between system log uploads.
+  base::TimeDelta upload_frequency_;
+
+  // The time the last upload attempt was performed.
+  base::Time last_upload_attempt_;
+
+  // TaskRunner used for scheduling upload tasks.
+  const scoped_refptr<base::SequencedTaskRunner> task_runner_;
+
+  // The upload job that is re-created every time when the upload starts.
+  scoped_ptr<SystemLogUploadJob> upload_job_;
+
+  // Note: This should remain the last member so it'll be destroyed and
+  // invalidate the weak pointers before any other members are destroyed.
+  base::WeakPtrFactory<SystemLogUploader> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(SystemLogUploader);
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_CHROMEOS_POLICY_SYSTEM_LOG_UPLOADER_H_