Add stream sample and docs for how to run it
This commit is contained in:
Dave Syer
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/*
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* Copyright 2013-2015 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample;
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import java.util.Random;
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import lombok.SneakyThrows;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.cloud.sleuth.TraceManager;
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import org.springframework.scheduling.annotation.Async;
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import org.springframework.stereotype.Component;
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/**
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* @author Spencer Gibb
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*/
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@Component
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public class SampleBackground {
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@Autowired
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private TraceManager traceManager;
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@SneakyThrows
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@Async
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public void background() {
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final Random random = new Random();
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int millis = random.nextInt(1000);
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Thread.sleep(millis);
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this.traceManager.addAnnotation("background-sleep-millis", String.valueOf(millis));
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}
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}
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/*
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* Copyright 2013-2015 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample;
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import java.util.Random;
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import java.util.concurrent.Callable;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.context.embedded.EmbeddedServletContainerInitializedEvent;
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import org.springframework.cloud.sleuth.Span;
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import org.springframework.cloud.sleuth.Trace;
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import org.springframework.cloud.sleuth.TraceAccessor;
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import org.springframework.cloud.sleuth.TraceManager;
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import org.springframework.cloud.sleuth.sampler.AlwaysSampler;
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import org.springframework.context.ApplicationListener;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RestController;
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import org.springframework.web.client.RestTemplate;
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import lombok.SneakyThrows;
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import lombok.extern.slf4j.Slf4j;
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/**
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* @author Spencer Gibb
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*/
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@Slf4j
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@RestController
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public class SampleController implements
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ApplicationListener<EmbeddedServletContainerInitializedEvent> {
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@Autowired
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private RestTemplate restTemplate;
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@Autowired
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private TraceManager traceManager;
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@Autowired
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private TraceAccessor accessor;
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@Autowired
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private SampleBackground controller;
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private int port;
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@SneakyThrows
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@RequestMapping("/")
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public String hi() {
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final Random random = new Random();
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Thread.sleep(random.nextInt(1000));
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String s = this.restTemplate.getForObject("http://localhost:" + this.port
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+ "/hi2", String.class);
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return "hi/" + s;
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}
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@RequestMapping("/call")
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public Callable<String> call() {
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return new Callable<String>() {
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@Override
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public String call() throws Exception {
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final Random random = new Random();
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int millis = random.nextInt(1000);
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Thread.sleep(millis);
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SampleController.this.traceManager.addAnnotation("callable-sleep-millis", String.valueOf(millis));
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Span currentSpan = SampleController.this.accessor.getCurrentSpan();
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return "async hi: " + currentSpan;
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}
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};
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}
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@RequestMapping("/async")
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public String async() {
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this.controller.background();
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return "ho";
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}
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@SneakyThrows
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@RequestMapping("/hi2")
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public String hi2() {
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final Random random = new Random();
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int millis = random.nextInt(1000);
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Thread.sleep(millis);
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this.traceManager.addAnnotation("random-sleep-millis", String.valueOf(millis));
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return "hi2";
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}
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@SneakyThrows
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@RequestMapping("/traced")
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public String traced() {
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Trace trace = this.traceManager.startSpan("customTraceEndpoint",
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new AlwaysSampler(), null);
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final Random random = new Random();
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int millis = random.nextInt(1000);
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log.info("Sleeping for {} millis", millis);
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Thread.sleep(millis);
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this.traceManager.addAnnotation("random-sleep-millis", String.valueOf(millis));
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String s = this.restTemplate.getForObject("http://localhost:" + this.port
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+ "/call", String.class);
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this.traceManager.close(trace);
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return "traced/" + s;
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}
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@SneakyThrows
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@RequestMapping("/start")
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public String start() {
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final Random random = new Random();
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int millis = random.nextInt(1000);
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log.info("Sleeping for {} millis", millis);
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Thread.sleep(millis);
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this.traceManager.addAnnotation("random-sleep-millis", String.valueOf(millis));
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String s = this.restTemplate.getForObject("http://localhost:" + this.port
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+ "/call", String.class);
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return "start/" + s;
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}
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@Override
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public void onApplicationEvent(EmbeddedServletContainerInitializedEvent event) {
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this.port = event.getEmbeddedServletContainer().getPort();
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}
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}
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@@ -0,0 +1,51 @@
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/*
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* Copyright 2013-2015 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.cloud.sleuth.Sampler;
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import org.springframework.cloud.sleuth.sampler.AlwaysSampler;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.EnableAspectJAutoProxy;
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import org.springframework.scheduling.annotation.EnableAsync;
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/**
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* @author Spencer Gibb
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*/
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@SpringBootApplication
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@EnableAspectJAutoProxy(proxyTargetClass = true)
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@EnableAsync
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public class SampleSleuthApplication {
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public static final String CLIENT_NAME = "testApp";
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@Bean
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public Sampler<?> defaultSampler() {
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return new AlwaysSampler();
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}
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@Bean
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public SampleController sampleController() {
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return new SampleController();
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}
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public static void main(String[] args) {
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SpringApplication.run(SampleSleuthApplication.class, args);
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}
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}
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@@ -0,0 +1,14 @@
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server:
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port: 3379
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spring:
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application:
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name: testSleuthApp
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sleuth:
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log:
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json:
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enabled: true
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logging:
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pattern:
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level: '%clr([trace=%X{X-Trace-Id:-},span=%X{X-Span-Id:-}]){yellow} %5p'
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@@ -0,0 +1,18 @@
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package sample;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.boot.test.SpringApplicationConfiguration;
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import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
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import org.springframework.test.context.web.WebAppConfiguration;
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@RunWith(SpringJUnit4ClassRunner.class)
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@SpringApplicationConfiguration(classes = SampleSleuthApplication.class)
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@WebAppConfiguration
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public class SampleSleuthApplicationTests {
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@Test
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public void contextLoads() {
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}
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}
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