private void processFile()

in modules/transports/core/vfs/src/main/java/org/apache/synapse/transport/vfs/VFSTransportListener.java [463:593]
104 lines of code
22 McCabe index (conditional complexity)

    private void processFile(PollTableEntry entry, FileObject file) throws AxisFault {

        try {
            FileContent content = file.getContent();
            String fileName = file.getName().getBaseName();
            String filePath = file.getName().getPath();

            metrics.incrementBytesReceived(content.getSize());

            Map<String, Object> transportHeaders = new HashMap<String, Object>();
            transportHeaders.put(VFSConstants.FILE_PATH, filePath);
            transportHeaders.put(VFSConstants.FILE_NAME, fileName);

            try {
                transportHeaders.put(VFSConstants.FILE_LENGTH, content.getSize());
                transportHeaders.put(VFSConstants.LAST_MODIFIED, content.getLastModifiedTime());
            } catch (FileSystemException ignore) {}

            MessageContext msgContext = entry.createMessageContext();
            
            String contentType = entry.getContentType();
            if (BaseUtils.isBlank(contentType)) {
                if (file.getName().getExtension().toLowerCase().endsWith(".xml")) {
                    contentType = "text/xml";
                } else if (file.getName().getExtension().toLowerCase().endsWith(".txt")) {
                    contentType = "text/plain";
                }
            } else {
                // Extract the charset encoding from the configured content type and
                // set the CHARACTER_SET_ENCODING property as e.g. SOAPBuilder relies on this.
                String charSetEnc = null;
                try {
                    if (contentType != null) {
                        charSetEnc = new ContentType(contentType).getParameter("charset");
                    }
                } catch (ParseException ex) {
                    // ignore
                }
                msgContext.setProperty(Constants.Configuration.CHARACTER_SET_ENCODING, charSetEnc);
            }

            // if the content type was not found, but the service defined it.. use it
            if (contentType == null) {
                if (entry.getContentType() != null) {
                    contentType = entry.getContentType();
                } else if (VFSUtils.getProperty(
                    content, BaseConstants.CONTENT_TYPE) != null) {
                    contentType =
                        VFSUtils.getProperty(content, BaseConstants.CONTENT_TYPE);
                }
            }

            // remove CLIENT_API_NON_BLOCKING to avoid Thread switching at the Sender level and allow
            // same Thread to be used till the message is delivered through the endpoint
            msgContext.removeProperty(msgContext.CLIENT_API_NON_BLOCKING);

            // does the service specify a default reply file URI ?
            String replyFileURI = entry.getReplyFileURI();
            if (replyFileURI != null) {
                msgContext.setProperty(Constants.OUT_TRANSPORT_INFO,
                        new VFSOutTransportInfo(replyFileURI, entry.isFileLockingEnabled()));
            }

            // Determine the message builder to use
            Builder builder;
            if (contentType == null) {
                log.debug("No content type specified. Using SOAP builder.");
                builder = new SOAPBuilder();
            } else {
                int index = contentType.indexOf(';');
                String type = index > 0 ? contentType.substring(0, index) : contentType;
                builder = BuilderUtil.getBuilderFromSelector(type, msgContext);
                if (builder == null) {
                    if (log.isDebugEnabled()) {
                        log.debug("No message builder found for type '" + type +
                                "'. Falling back to SOAP.");
                    }
                    builder = new SOAPBuilder();
                }
            }

            // set the message payload to the message context
            InputStream in;
            ManagedDataSource dataSource;
            if (builder instanceof DataSourceMessageBuilder && entry.isStreaming()) {
                in = null;
                dataSource = ManagedDataSourceFactory.create(
                        new FileObjectDataSource(file, contentType));
            } else {
                in = new AutoCloseInputStream(content.getInputStream());
                dataSource = null;
            }
            
            try {
                OMElement documentElement;
                if (in != null) {
                    documentElement = builder.processDocument(in, contentType, msgContext);
                } else {
                    documentElement = ((DataSourceMessageBuilder)builder).processDocument(
                            dataSource, contentType, msgContext);
                }
                msgContext.setEnvelope(TransportUtils.createSOAPEnvelope(documentElement));
                
                handleIncomingMessage(
                    msgContext,
                    transportHeaders,
                    null, //* SOAP Action - not applicable *//
                    contentType
                );
            } finally {
                if (dataSource != null) {
                    dataSource.destroy();
                }
            }

            if (log.isDebugEnabled()) {
                log.debug("Processed file : " + file + " of Content-type : " + contentType);
            }

        } catch (FileSystemException e) {
            handleException("Error reading file content or attributes : " + file, e);
            
        } finally {
            try {
                // As per the Commons-VFS API docs, this will also close the underlying
                // FileContent object and any open streams.
                file.close();
            } catch (FileSystemException ignored) {
            }
        }
    }