Java中的分布式跟踪
Java中实现分布式跟踪通常需要使用一些外部库或框架,如Zipkin、Jaeger等。以下是一个使用Brave库进行分布式跟踪的简单示例。
首先,添加Brave的依赖到你的项目中:
<dependency>
<groupId>io.zipkin.brave</groupId>
<artifactId>brave-instrumentation-spring-web</artifactId>
<version>5.12.1</version>
</dependency>
接下来,配置Brave的Tracing实例:
import brave.Tracing;
import brave.context.log4j2.ThreadContextCurrentTraceContext;
import brave.sampler.Sampler;
import zipkin2.reporter.AsyncReporter;
import zipkin2.reporter.okhttp3.OkHttpSender;
public class TracingConfiguration {
public static Tracing tracing() {
// 指定Zipkin服务地址
String zipkinUrl = "http://localhost:9411";
// 创建一个发送器,用于将tracing数据发送到Zipkin服务器
OkHttpSender sender = OkHttpSender.create(zipkinUrl);
// 创建一个异步报告器,用于异步发送tracing数据
AsyncReporter<Span> reporter = AsyncReporter.builder(sender)
.build(SpanBytesEncoder.JSON_V2);
// 创建Tracing实例,并设置采样策略为接受所有请求(实际情况可以根据需要调整)
Tracing tracing = Tracing.newBuilder()
.localServiceName("my-service") // 设置服务名
.currentTraceContext(ThreadContextCurrentTraceContext.create())
.spanReporter(reporter)
.sampler(Sampler.ALWAYS_SAMPLE) // 采样所有请求
.build();
return tracing;
}
}
最后,在Spring应用中使用Brave的拦截器:
import brave.spring.web.TracingClientHttpRequestInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
import java.util.Collections;
@Configuration
public class WebConfig {
private final TracingClientHttpRequestInterceptor tracingInterceptor;
public WebConfig(TracingClientHttpRequestInterceptor tracingInterceptor) {
this.tracingInterceptor = tracingInterceptor;
}
@Bean
public RestTemplate restTemplate() {
RestTemplate restTemplate = new RestTemplate();
restTemplate.setInterceptors(Collections.singletonList(tracingInterceptor));
return restTemplate;
}
}
这样,你就可以通
评论已关闭