// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

#include "kudu/consensus/log_metrics.h"

#include "kudu/util/metrics.h"

METRIC_DEFINE_counter(tablet, log_bytes_logged, "Bytes Written to WAL",
                      kudu::MetricUnit::kBytes,
                      "Number of bytes logged since service start",
                      kudu::MetricLevel::kDebug);

METRIC_DEFINE_histogram(tablet, log_sync_latency, "Log Sync Latency",
                        kudu::MetricUnit::kMicroseconds,
                        "Microseconds spent on synchronizing the log segment file",
                        kudu::MetricLevel::kInfo,
                        60000000LU, 2);

METRIC_DEFINE_histogram(tablet, log_append_latency, "Log Append Latency",
                        kudu::MetricUnit::kMicroseconds,
                        "Microseconds spent on appending to the log segment file",
                        kudu::MetricLevel::kInfo,
                        60000000LU, 2);

METRIC_DEFINE_histogram(tablet, log_group_commit_latency, "Log Group Commit Latency",
                        kudu::MetricUnit::kMicroseconds,
                        "Microseconds spent on committing an entire group",
                        kudu::MetricLevel::kDebug,
                        60000000LU, 2);

METRIC_DEFINE_histogram(tablet, log_roll_latency, "Log Roll Latency",
                        kudu::MetricUnit::kMicroseconds,
                        "Microseconds spent on rolling over to a new log segment file",
                        kudu::MetricLevel::kDebug,
                        60000000LU, 2);

METRIC_DEFINE_histogram(tablet, log_entry_batches_per_group, "Log Group Commit Batch Size",
                        kudu::MetricUnit::kRequests,
                        "Number of log entry batches in a group commit group",
                        kudu::MetricLevel::kDebug,
                        1024, 2);

namespace kudu {
namespace log {

#define MINIT(x) x(METRIC_log_##x.Instantiate(metric_entity))
LogMetrics::LogMetrics(const scoped_refptr<MetricEntity>& metric_entity)
    : MINIT(bytes_logged),
      MINIT(sync_latency),
      MINIT(append_latency),
      MINIT(group_commit_latency),
      MINIT(roll_latency),
      MINIT(entry_batches_per_group) {
}
#undef MINIT

} // namespace log
} // namespace kudu