| // 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::context::tracer::Tracer; |
| use skywalking::reporter::grpc::GrpcReporter; |
| use std::error::Error; |
| use tokio::signal; |
| |
| async fn handle_request(tracer: Tracer) { |
| let mut ctx = tracer.create_trace_context(); |
| |
| { |
| // Generate an Entry Span when a request is received. |
| // An Entry Span is generated only once per context. |
| // Assign a variable name to guard the span not to be dropped immediately. |
| let _span = ctx.create_entry_span("op1"); |
| |
| // Something... |
| |
| { |
| // Generates an Exit Span when executing an RPC. |
| let _span2 = ctx.create_exit_span("op2", "remote_peer"); |
| |
| // Something... |
| |
| // Auto close span2 when dropped. |
| } |
| |
| // Auto close span when dropped. |
| } |
| |
| // Auto report ctx when dropped. |
| } |
| |
| #[tokio::main] |
| async fn main() -> Result<(), Box<dyn Error>> { |
| let reporter = GrpcReporter::connect("http://0.0.0.0:11800").await?; |
| let tracer = Tracer::new("service", "instance", reporter); |
| |
| tokio::spawn(handle_request(tracer.clone())); |
| |
| // Start to report. |
| let handle = tracer.reporting(async move { |
| let _ = signal::ctrl_c().await; |
| }); |
| |
| handle.await?; |
| |
| Ok(()) |
| } |