Add metrics.

Cargo.toml

@@ -43,6 +43,7 @@ bytes = "1.2.1"
 cfg-if = "1.0.0"
 futures-core = "0.3.21"
 futures-util = "0.3.21"
+portable-atomic = { version = "0.3.13", features = ["float"] }
 prost = "0.11.0"
 prost-derive = "0.11.0"
 serde = { version = "1.0.143", features = ["derive"] }
@@ -68,6 +69,10 @@ required-features = ["mock"]
 name = "logging"
 required-features = ["mock"]
 
+[[test]]
+name = "metrics"
+required-features = ["mock"]
+
 [[example]]
 name = "simple_trace_report"
 path = "examples/simple_trace_report.rs"

README.md

@@ -47,13 +47,22 @@ the context after the span finished.
 
 LogRecord is the simple builder for the LogData, which is the Log format of Skywalking.
 
+## Metrics
+
+### Meter
+
+- **Counter** API represents a single monotonically increasing counter which automatically collects data and reports to the backend.
+- **Gauge** API represents a single numerical value.
+- **Histogram** API represents a summary sample observations with customized buckets.
+
 # Example
 
 ```rust, no_run
 use skywalking::{
     logging::{logger::Logger, record::{LogRecord, RecordType}},
     reporter::grpc::GrpcReporter,
     trace::tracer::Tracer,
+    metrics::{meter::Counter, metricer::Metricer},
 };
 use std::error::Error;
 use tokio::signal;
@@ -94,6 +103,18 @@ async fn handle_request(tracer: Tracer, logger: Logger) {
     // Auto report ctx when dropped.
 }
 
+async fn handle_metric(mut metricer: Metricer) {
+    let counter = metricer.register(
+        Counter::new("instance_trace_count")
+            .add_label("region", "us-west")
+            .add_label("az", "az-1"),
+    );
+
+    metricer.boot().await;
+
+    counter.increment(10.);
+}
+
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn Error>> {
     // Connect to skywalking oap server.
@@ -109,7 +130,10 @@ async fn main() -> Result<(), Box<dyn Error>> {
         .spawn();
 
     let tracer = Tracer::new("service", "instance", reporter.clone());
-    let logger = Logger::new("service", "instance", reporter);
+    let logger = Logger::new("service", "instance", reporter.clone());
+    let metricer = Metricer::new("service", "instance", reporter);
+
+    handle_metric(metricer).await;
 
     handle_request(tracer, logger).await;
 
@@ -167,7 +191,7 @@ For details, please refer to [prost-build:sourcing-protoc](https://docs.rs/prost
 
 # Release
 
-The SkyWalking committer(PMC included) could follow [this doc](Release-guide.md) to release an official version.
+The SkyWalking committer(PMC included) could follow [this doc](https://github.com/apache/skywalking-rust/blob/master/Release-guide.md) to release an official version.
 
 # License
 

build.rs

@@ -24,6 +24,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         .compile(
             &[
                 "./skywalking-data-collect-protocol/language-agent/Tracing.proto",
+                "./skywalking-data-collect-protocol/language-agent/Meter.proto",
                 "./skywalking-data-collect-protocol/logging/Logging.proto",
             ],
             &["./skywalking-data-collect-protocol"],

e2e/data/expected_context.yaml

@@ -146,3 +146,33 @@ logItems:
         value: DEBUG
     timestamp: gt 0
   serviceName: consumer
+
+meterItems:
+- serviceName: consumer
+  meterSize: 3
+  meters:
+  - meterId:
+      name: instance_trace_count
+      tags:
+      - name: region
+        value: us-west
+      - name: az
+        value: az-1
+    singleValue: 30.0
+  - meterId:
+      name: instance_trace_count
+      tags:
+      - name: region
+        value: us-east
+      - name: az
+        value: az-3
+    singleValue: 20.0
+  - meterId:
+      name: instance_trace_count
+      tags:
+      - name: region
+        value: us-north
+      - name: az
+        value: az-1
+    histogramBuckets: [10.0, 20.0, 30.0]
+    histogramValues: [1, 2, 0]

e2e/src/main.rs

@@ -25,6 +25,10 @@ use skywalking::{
         logger::{self, Logger},
         record::{LogRecord, RecordType},
     },
+    metrics::{
+        meter::{Counter, Gauge, Histogram},
+        metricer::Metricer,
+    },
     reporter::grpc::GrpcReporter,
     trace::{
         propagation::{
@@ -172,6 +176,33 @@ async fn run_consumer_service(host: [u8; 4]) {
     }
 }
 
+fn run_consumer_metric(mut metricer: Metricer) {
+    let counter = metricer.register(
+        Counter::new("instance_trace_count")
+            .add_label("region", "us-west")
+            .add_label("az", "az-1"),
+    );
+    metricer.register(
+        Gauge::new("instance_trace_count", || 20.)
+            .add_label("region", "us-east")
+            .add_label("az", "az-3"),
+    );
+    let histogram = metricer.register(
+        Histogram::new("instance_trace_count", vec![10., 20., 30.])
+            .add_label("region", "us-north")
+            .add_label("az", "az-1"),
+    );
+
+    counter.increment(10.);
+    counter.increment(20.);
+
+    histogram.add_value(10.);
+    histogram.add_value(29.);
+    histogram.add_value(20.);
+
+    metricer.boot();
+}
+
 #[derive(StructOpt)]
 #[structopt(name = "basic")]
 struct Opt {
@@ -187,7 +218,8 @@ async fn main() -> Result<(), Box<dyn Error>> {
 
     if opt.mode == "consumer" {
         tracer::set_global_tracer(Tracer::new("consumer", "node_0", reporter.clone()));
-        logger::set_global_logger(Logger::new("consumer", "node_0", reporter));
+        logger::set_global_logger(Logger::new("consumer", "node_0", reporter.clone()));
+        run_consumer_metric(Metricer::new("consumer", "node_0", reporter));
         run_consumer_service([0, 0, 0, 0]).await;
     } else if opt.mode == "producer" {
         tracer::set_global_tracer(Tracer::new("producer", "node_0", reporter.clone()));

examples/simple_metric_report.rs

@@ -0,0 +1,55 @@
+// 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.
+//
+
+use skywalking::{
+    metrics::{meter::Counter, metricer::Metricer},
+    reporter::grpc::GrpcReporter,
+};
+use std::error::Error;
+use tokio::signal;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn Error>> {
+    // Connect to skywalking oap server.
+    let reporter = GrpcReporter::connect("http://0.0.0.0:11800").await?;
+
+    // Spawn the reporting in background, with listening the graceful shutdown
+    // signal.
+    let handle = reporter
+        .reporting()
+        .await
+        .with_graceful_shutdown(async move {
+            signal::ctrl_c().await.expect("failed to listen for event");
+        })
+        .spawn();
+
+    // Do metrics.
+    let mut metricer = Metricer::new("service", "instance", reporter.clone());
+    let counter = metricer.register(
+        Counter::new("instance_trace_count")
+            .add_label("region", "us-west")
+            .add_label("az", "az-1"),
+    );
+
+    counter.increment(1.);
+
+    metricer.boot().await.unwrap();
+    handle.await.unwrap();
+
+    Ok(())
+}

src/common/system_time.rs

@@ -19,6 +19,7 @@ use cfg_if::cfg_if;
 pub(crate) enum TimePeriod {
     Start,
     Log,
+    Metric,
     End,
 }
 
@@ -28,6 +29,7 @@ cfg_if! {
             match period {
                 TimePeriod::Start => 1,
                 TimePeriod::Log => 10,
+                TimePeriod::Metric => 10,
                 TimePeriod::End => 100,
             }
         }

src/lib.rs

@@ -20,6 +20,7 @@
 pub mod common;
 pub(crate) mod error;
 pub mod logging;
+pub mod metrics;
 pub mod reporter;
 pub mod skywalking_proto;
 pub mod trace;

src/logging/logger.rs

@@ -22,8 +22,8 @@ use tokio::sync::OnceCell;
 static GLOBAL_LOGGER: OnceCell<Logger> = OnceCell::const_new();
 
 /// Set the global logger.
-pub fn set_global_logger(tracer: Logger) {
-    if GLOBAL_LOGGER.set(tracer).is_err() {
+pub fn set_global_logger(logger: Logger) {
+    if GLOBAL_LOGGER.set(logger).is_err() {
         panic!("global logger has setted")
     }
 }

src/logging/record.rs

@@ -55,16 +55,19 @@ impl LogRecord {
         Default::default()
     }
 
+    #[inline]
     pub fn custome_time(mut self, time: SystemTime) -> Self {
         self.time = Some(time);
         self
     }
 
+    #[inline]
     pub fn ignore_time(mut self) -> Self {
         self.is_ignore_time = true;
         self
     }
 
+    #[inline]
     pub fn endpoint(mut self, endpoint: impl ToString) -> Self {
         self.endpoint = endpoint.to_string();
         self