springcloud gateway内置了19种过滤器工厂,我们可以根据不同的业务场景选择使用.当然,gateway也是支持实现自定义过滤器的.接下来,我们自定义一个filter用来统计每次请求的耗时.
相关依赖配置详见上一篇文章.
1.编写MyFilter
public class MyFilter implements GatewayFilter,Ordered {
private static final String REQUEST_TIME_BEGIN = "requestTimeBegin";
@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
//记录请求开始时间
exchange.getAttributes().put(REQUEST_TIME_BEGIN, System.currentTimeMillis());
return chain.filter(exchange).then(Mono.fromRunnable(new Runnable() {
@Override
public void run() {
Long startTime = exchange.getAttribute(REQUEST_TIME_BEGIN);
if (startTime != null) {
//打印
System.out.println(exchange.getRequest().getURI() + " 耗时" + (System.currentTimeMillis() - startTime));
}
}
}));
}
@Ove