Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 86 insertions, 0 deletions

diff --git a/src/rocksdb/utilities/trace/replayer_impl.h b/src/rocksdb/utilities/trace/replayer_impl.h
new file mode 100644
index 000000000..367b0b51e
--- /dev/null
+++ b/src/rocksdb/utilities/trace/replayer_impl.h
@@ -0,0 +1,86 @@
+//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
+#pragma once
+#ifndef ROCKSDB_LITE
+
+#include <atomic>
+#include <functional>
+#include <memory>
+#include <mutex>
+#include <unordered_map>
+
+#include "rocksdb/db.h"
+#include "rocksdb/env.h"
+#include "rocksdb/status.h"
+#include "rocksdb/trace_reader_writer.h"
+#include "rocksdb/trace_record.h"
+#include "rocksdb/trace_record_result.h"
+#include "rocksdb/utilities/replayer.h"
+#include "trace_replay/trace_replay.h"
+
+namespace ROCKSDB_NAMESPACE {
+
+class ReplayerImpl : public Replayer {
+ public:
+  ReplayerImpl(DB* db, const std::vector<ColumnFamilyHandle*>& handles,
+               std::unique_ptr<TraceReader>&& reader);
+  ~ReplayerImpl() override;
+
+  using Replayer::Prepare;
+  Status Prepare() override;
+
+  using Replayer::Next;
+  Status Next(std::unique_ptr<TraceRecord>* record) override;
+
+  using Replayer::Execute;
+  Status Execute(const std::unique_ptr<TraceRecord>& record,
+                 std::unique_ptr<TraceRecordResult>* result) override;
+
+  using Replayer::Replay;
+  Status Replay(
+      const ReplayOptions& options,
+      const std::function<void(Status, std::unique_ptr<TraceRecordResult>&&)>&
+          result_callback) override;
+
+  using Replayer::GetHeaderTimestamp;
+  uint64_t GetHeaderTimestamp() const override;
+
+ private:
+  Status ReadHeader(Trace* header);
+  Status ReadTrace(Trace* trace);
+
+  // Generic function to execute a Trace in a thread pool.
+  static void BackgroundWork(void* arg);
+
+  std::unique_ptr<TraceReader> trace_reader_;
+  std::mutex mutex_;
+  std::atomic<bool> prepared_;
+  std::atomic<bool> trace_end_;
+  uint64_t header_ts_;
+  std::unique_ptr<TraceRecord::Handler> exec_handler_;
+  Env* env_;
+  // When reading the trace header, the trace file version can be parsed.
+  // Replayer will use different decode method to get the trace content based
+  // on different trace file version.
+  int trace_file_version_;
+};
+
+// Arguments passed to BackgroundWork() for replaying in a thread pool.
+struct ReplayerWorkerArg {
+  Trace trace_entry;
+  int trace_file_version;
+  // Handler to execute TraceRecord.
+  TraceRecord::Handler* handler;
+  // Callback function to report the error status and the timestamp of the
+  // TraceRecord (not the start/end timestamp of executing the TraceRecord).
+  std::function<void(Status, uint64_t)> error_cb;
+  // Callback function to report the trace execution status and operation
+  // execution status/result(s).
+  std::function<void(Status, std::unique_ptr<TraceRecordResult>&&)> result_cb;
+};
+
+}  // namespace ROCKSDB_NAMESPACE
+#endif  // ROCKSDB_LITE