// Copyright 2016 PingCAP, Inc.
//
// Licensed 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,
// See the License for the specific language governing permissions and
// limitations under the License.

use prometheus::{exponential_buckets, HistogramVec, IntCounterVec};

lazy_static! {
    pub static ref ASYNC_REQUESTS_COUNTER_VEC: IntCounterVec = register_int_counter_vec!(
        "tikv_storage_engine_async_request_total",
        "Total number of engine asynchronous requests",
        &["type", "status"]
    ).unwrap();
    pub static ref ASYNC_REQUESTS_DURATIONS_VEC: HistogramVec = register_histogram_vec!(
        "tikv_storage_engine_async_request_duration_seconds",
        "Bucketed histogram of processing successful asynchronous requests.",
        &["type"],
        exponential_buckets(0.0005, 2.0, 20).unwrap()
    ).unwrap();
}
