public final void handleRequest()

in httpcore5/src/main/java/org/apache/hc/core5/http/nio/support/classic/AbstractClassicServerExchangeHandler.java [106:251]
122 lines of code
9 McCabe index (conditional complexity)

    public final void handleRequest(
            final HttpRequest request,
            final EntityDetails entityDetails,
            final ResponseChannel responseChannel,
            final HttpContext context) throws HttpException, IOException {
        final AtomicBoolean responseCommitted = new AtomicBoolean(false);

        final HttpResponse response = new BasicHttpResponse(HttpStatus.SC_OK);
        final HttpResponse responseWrapper = new HttpResponseWrapper(response){

            private void ensureNotCommitted() {
                Asserts.check(!responseCommitted.get(), "Response already committed");
            }

            @Override
            public void addHeader(final String name, final Object value) {
                ensureNotCommitted();
                super.addHeader(name, value);
            }

            @Override
            public void setHeader(final String name, final Object value) {
                ensureNotCommitted();
                super.setHeader(name, value);
            }

            @Override
            public void setVersion(final ProtocolVersion version) {
                ensureNotCommitted();
                super.setVersion(version);
            }

            @Override
            public void setCode(final int code) {
                ensureNotCommitted();
                super.setCode(code);
            }

            @Override
            public void setReasonPhrase(final String reason) {
                ensureNotCommitted();
                super.setReasonPhrase(reason);
            }

            @Override
            public void setLocale(final Locale locale) {
                ensureNotCommitted();
                super.setLocale(locale);
            }

        };

        final InputStream inputStream;
        if (entityDetails != null) {
            inputBuffer = new SharedInputBuffer(initialBufferSize);
            inputStream = new ContentInputStream(inputBuffer);
        } else {
            inputStream = null;
        }
        outputBuffer = new SharedOutputBuffer(initialBufferSize);

        final OutputStream outputStream = new ContentOutputStream(outputBuffer) {

            private void triggerResponse() throws IOException {
                try {
                    if (responseCommitted.compareAndSet(false, true)) {
                        responseChannel.sendResponse(response, new EntityDetails() {

                            @Override
                            public long getContentLength() {
                                return -1;
                            }

                            @Override
                            public String getContentType() {
                                final Header h = response.getFirstHeader(HttpHeaders.CONTENT_TYPE);
                                return h != null ? h.getValue() : null;
                            }

                            @Override
                            public String getContentEncoding() {
                                final Header h = response.getFirstHeader(HttpHeaders.CONTENT_ENCODING);
                                return h != null ? h.getValue() : null;
                            }

                            @Override
                            public boolean isChunked() {
                                return false;
                            }

                            @Override
                            public Set<String> getTrailerNames() {
                                return null;
                            }

                        }, context);
                    }
                } catch (final HttpException ex) {
                    throw new IOException(ex.getMessage(), ex);
                }
            }

            @Override
            public void close() throws IOException {
                triggerResponse();
                super.close();
            }

            @Override
            public void write(final byte[] b, final int off, final int len) throws IOException {
                triggerResponse();
                super.write(b, off, len);
            }

            @Override
            public void write(final byte[] b) throws IOException {
                triggerResponse();
                super.write(b);
            }

            @Override
            public void write(final int b) throws IOException {
                triggerResponse();
                super.write(b);
            }

        };

        if (state.compareAndSet(State.IDLE, State.ACTIVE)) {
            executor.execute(() -> {
                try {
                    handle(request, inputStream, responseWrapper, outputStream, context);
                    Closer.close(inputStream);
                    outputStream.close();
                } catch (final Exception ex) {
                    exception.compareAndSet(null, ex);
                    if (inputBuffer != null) {
                        inputBuffer.abort();
                    }
                    outputBuffer.abort();
                } finally {
                    state.set(State.COMPLETED);
                }
            });
        }
    }