public void run()

in modules/transports/core/nhttp/src/main/java/org/apache/synapse/transport/nhttp/ClientWorker.java [192:320]
100 lines of code
16 McCabe index (conditional complexity)

    public void run() {
        // to support Sandesha.. if there isn't a response message context, we cannot read any
        // response and populate it with the soap envelope
        if (responseMsgCtx == null) {
            return;
        }

        try {
            if (in != null) {
                Header cType = response.getFirstHeader(HTTP.CONTENT_TYPE);
                String contentType;
                if (cType != null) {
                    // This is the most common case - Most of the time servers send the Content-Type
                    contentType = cType.getValue();
                } else {
                    // Server hasn't sent the header - Try to infer the content type
                    contentType = inferContentType();
                }

                String charSetEnc = BuilderUtil.getCharSetEncoding(contentType);
                if (charSetEnc == null) {
                    charSetEnc = MessageContext.DEFAULT_CHAR_SET_ENCODING;
                }

                responseMsgCtx.setProperty(
                        Constants.Configuration.CHARACTER_SET_ENCODING, charSetEnc);

                // workaround for Axis2 TransportUtils.createSOAPMessage() issue, where a response
                // of content type "text/xml" is thought to be REST if !MC.isServerSide(). This
                // question is still under debate and due to the timelines, I am commiting this
                // workaround as Axis2 1.2 is about to be released and Synapse 1.0
                responseMsgCtx.setServerSide(false);
                SOAPEnvelope envelope;
                try {
                    envelope = TransportUtils.createSOAPMessage(
                            responseMsgCtx,
                            HTTPTransportUtils.handleGZip(responseMsgCtx, in),
                            contentType);

                } catch (OMException e) {
                    // handle non SOAP and POX/REST payloads (probably text/html)
                    String errorMessage = "Unexpected response received. HTTP response code : "
                        + this.response.getStatusLine().getStatusCode() + " HTTP status : "
                        + this.response.getStatusLine().getReasonPhrase() + " exception : "
                        + e.getMessage();

                    log.warn(errorMessage);
                    if (log.isDebugEnabled()) {
                        log.debug(errorMessage, e);
                        log.debug("Creating the SOAPFault to be injected...");
                    }
                    SOAPFactory factory = OMAbstractFactory.getSOAP11Factory();
                    envelope = factory.getDefaultFaultEnvelope();
                    SOAPFaultDetail detail = factory.createSOAPFaultDetail();
                    detail.setText(errorMessage);
                    envelope.getBody().getFault().setDetail(detail);
                    SOAPFaultReason reason = factory.createSOAPFaultReason();
                    reason.setText(errorMessage);
                    envelope.getBody().getFault().setReason(reason);
                    SOAPFaultCode code = factory.createSOAPFaultCode();
                    code.setText(Integer.toString(this.response.getStatusLine().getStatusCode()));
                    envelope.getBody().getFault().setCode(code);
                }
                responseMsgCtx.setServerSide(true);
                responseMsgCtx.setEnvelope(envelope);

            } else {
                // there is no response entity-body
                responseMsgCtx.setProperty(NhttpConstants.NO_ENTITY_BODY, Boolean.TRUE);
                responseMsgCtx.setEnvelope(OMAbstractFactory.getSOAP11Factory().getDefaultEnvelope());
            }

            // copy the HTTP status code as a message context property with the key HTTP_SC to be
            // used at the sender to set the propper status code when passing the message
            int statusCode = this.response.getStatusLine().getStatusCode();
            responseMsgCtx.setProperty(NhttpConstants.HTTP_SC, statusCode);
            if (statusCode >= 400) {
                responseMsgCtx.setProperty(NhttpConstants.FAULT_MESSAGE, NhttpConstants.TRUE);
            }
            responseMsgCtx.setProperty(NhttpConstants.NON_BLOCKING_TRANSPORT, true);
            if (endpointURLPrefix != null) {
                responseMsgCtx.setProperty(NhttpConstants.ENDPOINT_PREFIX, endpointURLPrefix);
            }

            // process response received
            try {
                AxisEngine.receive(responseMsgCtx);
            } catch (AxisFault af) {
                 // This will be reached if an exception is thrown within an Axis2 handler
                String errorMessage = "Fault processing response message through Axis2: " +
                        af.getMessage();

                log.warn(errorMessage);
                if (log.isDebugEnabled()) {
                    log.debug(errorMessage, af);
                    log.debug("Directly invoking SynapseCallbackReceiver after setting " +
                            "error properties");
                }

                responseMsgCtx.setProperty(
                        NhttpConstants.SENDING_FAULT, Boolean.TRUE);
                responseMsgCtx.setProperty(
                        NhttpConstants.ERROR_CODE, NhttpConstants.RESPONSE_PROCESSING_FAILURE);
                responseMsgCtx.setProperty(
                        NhttpConstants.ERROR_MESSAGE, errorMessage.split("\n")[0]);
                responseMsgCtx.setProperty(
                        NhttpConstants.ERROR_DETAIL, JavaUtils.stackToString(af));
                responseMsgCtx.setProperty(
                        NhttpConstants.ERROR_EXCEPTION, af);
                responseMsgCtx.getAxisOperation().getMessageReceiver().receive(responseMsgCtx);
            }

        } catch (AxisFault af) {
            log.error("Fault creating response SOAP envelope", af);
        } catch (XMLStreamException e) {
            log.error("Error creating response SOAP envelope", e);
        } catch (IOException e) {
            log.error("Error closing input stream from which message was read", e);

        } finally {
            // this is the guaranteed location to close the RESPONSE_SOURCE_CHANNEL that was used
            // to read the response back from the server.
            try {
                if (in != null) {
                    in.close();
                }
            } catch (IOException ignore) {}
        }
    }