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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_BASE_TELEMETRY_LOG_WRITER_H_
#define REMOTING_BASE_TELEMETRY_LOG_WRITER_H_
#include <string>
#include "base/containers/circular_deque.h"
#include "base/functional/callback.h"
#include "base/memory/scoped_refptr.h"
#include "base/threading/thread_checker.h"
#include "base/timer/timer.h"
#include "net/base/backoff_entry.h"
#include "remoting/base/chromoting_event.h"
#include "remoting/base/chromoting_event_log_writer.h"
#include "remoting/base/oauth_token_getter.h"
namespace network {
class SharedURLLoaderFactory;
} // namespace network
namespace remoting {
namespace apis {
namespace v1 {
class CreateEventRequest;
class CreateEventResponse;
} // namespace v1
} // namespace apis
class HttpStatus;
class ProtobufHttpClient;
// TelemetryLogWriter sends log entries (ChromotingEvent) to the telemetry
// server.
// Logs to be sent will be queued and sent when it is available. Logs failed
// to send will be retried for a few times and dropped if they still can't be
// sent.
// The log writer should be used entirely on one thread after it is created,
// unless otherwise noted.
class TelemetryLogWriter : public ChromotingEventLogWriter {
public:
explicit TelemetryLogWriter(std::unique_ptr<OAuthTokenGetter> token_getter);
TelemetryLogWriter(const TelemetryLogWriter&) = delete;
TelemetryLogWriter& operator=(const TelemetryLogWriter&) = delete;
~TelemetryLogWriter() override;
void Init(scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory);
// Push the log entry to the pending list and send out all the pending logs.
void Log(const ChromotingEvent& entry) override;
private:
void SendPendingEntries();
void DoSend(const apis::v1::CreateEventRequest& request);
void OnSendLogResult(const HttpStatus& status,
std::unique_ptr<apis::v1::CreateEventResponse> response);
// Returns true if there are no events sending or pending.
bool IsIdleForTesting();
THREAD_CHECKER(thread_checker_);
std::unique_ptr<OAuthTokenGetter> token_getter_;
std::unique_ptr<ProtobufHttpClient> http_client_;
net::BackoffEntry backoff_;
base::OneShotTimer backoff_timer_;
// Entries to be sent.
base::circular_deque<ChromotingEvent> pending_entries_;
// Entries being sent.
// These will be pushed back to pending_entries if error occurs.
base::circular_deque<ChromotingEvent> sending_entries_;
friend class TelemetryLogWriterTest;
};
} // namespace remoting
#endif // REMOTING_BASE_TELEMETRY_LOG_WRITER_H_
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