woshishitou commented on issue #6900:
URL: https://github.com/apache/skywalking/issues/6900#issuecomment-833425033
`
package com.example.gatewaydemo.filter;
import org.apache.skywalking.apm.toolkit.trace.TraceContext;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;
@Configuration
public class FilterConfig {
@Bean
public GlobalFilter b() {
return new BFilter();
}
public class BFilter implements GlobalFilter, Ordered {
@Override
public Mono<Void> filter(ServerWebExchange exchange,
GatewayFilterChain chain) {
// The value here is N/A
exchange.getResponse().getHeaders().set("tid",
TraceContext.traceId());
return chain.filter(exchange).then(Mono.fromRunnable(() ->
{
// The value here is also N/A
String traceId2 = TraceContext.traceId();
System.out.println("traceId:" + traceId2);
}));
}
@Override
public int getOrder() {
return 1;
}
}
}
`
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