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ca37294995
Summary: Introduce a framework that allows recording structured log events which are encoded as JSON and piped to a configured command line program. Reviewed By: pkaush Differential Revision: D18025183 fbshipit-source-id: ab6b4d510a905a30252f2cff85d107a0d32d149e
60 lines
1.5 KiB
C++
60 lines
1.5 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This software may be used and distributed according to the terms of the
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* GNU General Public License version 2.
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*/
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#include "eden/fs/telemetry/StructuredLogger.h"
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#include <time.h>
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#include <random>
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namespace {
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/**
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* The log database populates the time field automatically.
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*/
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constexpr bool kExplicitTimeField = true;
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uint32_t generateSessionId() {
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std::random_device rd;
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std::uniform_int_distribution<uint32_t> u;
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return u(rd);
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}
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/**
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* Returns a random, process-stable positive integer in the range of [0,
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* UINT32_MAX]
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*/
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uint32_t getSessionId() {
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static auto sessionId = generateSessionId();
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return sessionId;
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}
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} // namespace
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namespace facebook {
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namespace eden {
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StructuredLogger::StructuredLogger(bool enabled, SessionInfo sessionInfo)
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: enabled_{enabled},
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sessionId_{getSessionId()},
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sessionInfo_{std::move(sessionInfo)} {}
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DynamicEvent StructuredLogger::populateDefaultFields(const char* type) {
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DynamicEvent event;
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if (kExplicitTimeField) {
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event.addInt("time", ::time(nullptr));
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}
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event.addInt("session_id", sessionId_);
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event.addString("type", type);
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event.addString("user", sessionInfo_.username);
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event.addString("host", sessionInfo_.hostname);
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event.addString("os", sessionInfo_.os);
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event.addString("osver", sessionInfo_.osVersion);
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event.addString("edenver", sessionInfo_.edenVersion);
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return event;
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}
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} // namespace eden
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} // namespace facebook
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