public void handleRequest()

in apm-sniffer/apm-sdk-plugin/undertow-plugins/undertow-2.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/undertow/v2x/handler/TracingHandler.java [48:91]

44 lines of code
6 McCabe index (conditional complexity)


    public void handleRequest(HttpServerExchange exchange) throws Exception {
        final HeaderMap headers = exchange.getRequestHeaders();
        final ContextCarrier carrier = new ContextCarrier();
        CarrierItem items = carrier.items();
        while (items.hasNext()) {
            items = items.next();
            items.setHeadValue(headers.getFirst(items.getHeadKey()));
        }
        String operationName;
        if (null == template) {
            operationName = exchange.getRequestPath();
        } else {
            operationName = template;
        }
        final AbstractSpan span = ContextManager.createEntrySpan(exchange.getRequestMethod() + ":" + operationName, carrier);
        Tags.URL.set(span, exchange.getRequestURL());
        Tags.HTTP.METHOD.set(span, exchange.getRequestMethod().toString());
        span.setComponent(ComponentsDefine.UNDERTOW);
        SpanLayer.asHttp(span);
        try {
            span.prepareForAsync();
            exchange.addExchangeCompleteListener(new ExchangeCompletionListener() {
                @Override
                public void exchangeEvent(HttpServerExchange httpServerExchange, NextListener nextListener) {
                    nextListener.proceed();
                    Tags.HTTP_RESPONSE_STATUS_CODE.set(span, httpServerExchange.getStatusCode());
                    if (httpServerExchange.getStatusCode() >= 400) {
                        span.errorOccurred();
                    }
                    span.asyncFinish();
                }
            });
        } catch (Throwable e) {
            ContextManager.activeSpan().log(e);
        }
        try {
            next.handleRequest(exchange);
        } catch (Throwable e) {
            span.log(e);
        } finally {
            ContextManager.stopSpan(span);
            ContextManager.getRuntimeContext().remove(Constants.FORWARD_REQUEST_FLAG);
        }
    }