788d3b6365
In preparation to libchrome uprev, fork off non-protobuf code from Chromium's metrics component into platform2/metrics. The current version of Chromium's metrics component has been significantly refactored and pieces of functionality that Chromium OS was dependant on (e.g. MetricsLogBase class) has been removed completely. So, taking the r293518 version we have been using for a while and putting it as part of platform2/metrics now. BUG=None TEST=FEATURES=test emerge-link metrics Change-Id: Ib46ac1dff2e2b9cc881e4787b3c6b6250f0bf9c4 Reviewed-on: https://chromium-review.googlesource.com/234635 Tested-by: Alex Vakulenko <avakulenko@chromium.org> Reviewed-by: Bertrand Simonnet <bsimonnet@chromium.org> Commit-Queue: Alex Vakulenko <avakulenko@chromium.org> Trybot-Ready: Alex Vakulenko <avakulenko@chromium.org>
48 lines
1.7 KiB
C++
48 lines
1.7 KiB
C++
// Copyright 2014 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef METRICS_SERIALIZATION_SERIALIZATION_UTILS_H_
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#define METRICS_SERIALIZATION_SERIALIZATION_UTILS_H_
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#include <string>
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#include "base/memory/scoped_ptr.h"
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#include "base/memory/scoped_vector.h"
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namespace metrics {
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class MetricSample;
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// Metrics helpers to serialize and deserialize metrics collected by
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// ChromeOS.
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namespace SerializationUtils {
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// Deserializes a sample passed as a string and return a sample.
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// The return value will either be a scoped_ptr to a Metric sample (if the
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// deserialization was successful) or a NULL scoped_ptr.
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scoped_ptr<MetricSample> ParseSample(const std::string& sample);
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// Reads all samples from a file and truncate the file when done.
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void ReadAndTruncateMetricsFromFile(const std::string& filename,
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ScopedVector<MetricSample>* metrics);
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// Serializes a sample and write it to filename.
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// The format for the message is:
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// message_size, serialized_message
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// where
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// * message_size is the total length of the message (message_size +
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// serialized_message) on 4 bytes
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// * serialized_message is the serialized version of sample (using ToString)
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//
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// NB: the file will never leave the device so message_size will be written
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// with the architecture's endianness.
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bool WriteMetricToFile(const MetricSample& sample, const std::string& filename);
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// Maximum length of a serialized message
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static const int kMessageMaxLength = 1024;
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} // namespace SerializationUtils
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} // namespace metrics
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#endif // METRICS_SERIALIZATION_SERIALIZATION_UTILS_H_
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