public void after(final ServerWebExchange exchange) {
        Map<String, Object> attributes = exchange.getAttributes();
        long currentTimeMillis = System.currentTimeMillis();
        long startTime = (long) attributes.get(Constants.CHAIN_START_TIME);
        LOG.debug("shenyu chain handle uri:{}, traceId:{}, cost:{}", exchange.getRequest().getPath(), exchange.getLogPrefix(), currentTimeMillis - startTime);
        attributes.remove(Constants.CHAIN_START_TIME);
    }
Plugin after operation.

@param exchange context
shenyu-web/src/main/java/org/apache/shenyu/web/handler/ShenyuWebHandler.java