/*
 * 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.
 *
 */

syntax = "proto3";

option java_multiple_files = true;
option java_package = "org.apache.skywalking.oap.server.exporter.grpc";


service MetricExportService {
    rpc export (stream ExportMetricValue) returns (ExportResponse) {
    }

    rpc subscription (SubscriptionReq) returns (SubscriptionsResp) {
    }
}

message ExportMetricValue {
    string metricName = 1;
    string entityName = 2;
    string entityId = 3;
    int64 timeBucket = 4;
    EventType eventType = 5;
    repeated MetricValue metricValues = 6;
}

message SubscriptionsResp {
    repeated SubscriptionMetric metrics = 1;
}

message SubscriptionMetric {
    string metricName = 1;
    EventType eventType = 2;
}

enum EventType {
    // The metrics aggregated in this bulk, not include the existing persistent data.
    INCREMENT = 0;
    // Final result of the metrics at this moment.
    TOTAL = 1;
}

message SubscriptionReq {

}

message ExportResponse {
}

message MetricValue {
    // Could be empty, if it is not a labeled metric.
    repeated KeyValue labels = 1;
    int64 longValue = 2;
}

message KeyValue {
    string key = 1;
    string value = 2;
}
