default void after(ServerWebExchange exchange) {
        long currentTimeMillis = System.currentTimeMillis();
        long startTime = (long) exchange.getAttributes().get(Constants.PLUGIN_START_TIME + named());
        LOG.debug("shenyu traceId:{}, plugin named:{}, cost:{}", exchange.getLogPrefix(), named(), currentTimeMillis - startTime);
        exchange.getAttributes().remove(Constants.PLUGIN_START_TIME + named());
    }
Plugin after operation.

@param exchange context
shenyu-plugin/shenyu-plugin-api/src/main/java/org/apache/shenyu/plugin/api/ShenyuPlugin.java