Examples with AsyncIOWriter org.atmosphere.runtime.AsyncIOWriter used on opensource projects

Example 1 with AsyncIOWriter

use of org.atmosphere.runtime.AsyncIOWriter in project atmosphere by Atmosphere.

the class SimpleRestInterceptor method attachWriter.

private void attachWriter(final AtmosphereResource r) {
    AtmosphereResponse res = r.getResponse();
    AsyncIOWriter writer = res.getAsyncIOWriter();
    if (writer instanceof AtmosphereInterceptorWriter) {
        ((AtmosphereInterceptorWriter) writer).interceptor(interceptor, 0);
    }
}

Example 2 with AsyncIOWriter

use of org.atmosphere.runtime.AsyncIOWriter in project atmosphere by Atmosphere.

the class HeartbeatInterceptor method inspect.

@Override
public Action inspect(final AtmosphereResource r) {
    final AtmosphereResourceImpl impl = AtmosphereResourceImpl.class.cast(r);
    final AtmosphereRequest request = impl.getRequest(false);
    final AtmosphereResponse response = impl.getResponse(false);
    // Check heartbeat
    if (clientHeartbeatFrequencyInSeconds > 0) {
        byte[] body = new byte[0];
        try {
            if (!request.getMethod().equalsIgnoreCase("GET")) {
                body = IOUtils.readEntirelyAsByte(r);
            }
        } catch (IOException e) {
            logger.warn("", e);
            cancelF(request);
            return Action.CONTINUE;
        }
        if (Arrays.equals(paddingBytes, body)) {
            // Dispatch an event to notify that a heartbeat has been intercepted
            // TODO: see https://github.com/Atmosphere/atmosphere/issues/1561
            final AtmosphereResourceEvent event = new HeartbeatAtmosphereResourceEvent(AtmosphereResourceImpl.class.cast(r));
            if (AtmosphereResourceHeartbeatEventListener.class.isAssignableFrom(r.getAtmosphereHandler().getClass())) {
                r.addEventListener(new AtmosphereResourceEventListenerAdapter.OnHeartbeat() {

                    @Override
                    public void onHeartbeat(AtmosphereResourceEvent event) {
                        AtmosphereResourceHeartbeatEventListener.class.cast(r.getAtmosphereHandler()).onHeartbeat(event);
                    }
                });
            }
            // Fire event
            r.notifyListeners(event);
            return Action.CANCELLED;
        }
        request.body(body);
    }
    if (Utils.webSocketMessage(r))
        return Action.CONTINUE;
    final int interval = extractHeartbeatInterval(impl);
    if (interval != 0) {
        if (!(Utils.pollableTransport(r.transport()) || r.transport() == AtmosphereResource.TRANSPORT.UNDEFINED)) {
            super.inspect(r);
            final boolean wasSuspended = r.isSuspended();
            // Otherwise, the listener will do the job
            if (wasSuspended) {
                clock(interval, r, request, response);
            }
            r.addEventListener(new Clock() {

                @Override
                public void onSuspend(AtmosphereResourceEvent event) {
                    // We did not clocked when this listener was added because connection was not already suspended
                    if (!wasSuspended) {
                        clock(interval, r, request, response);
                    }
                }

                @Override
                public void onResume(AtmosphereResourceEvent event) {
                    cancelF(request);
                }

                @Override
                public void onDisconnect(AtmosphereResourceEvent event) {
                    cancelF(request);
                }

                @Override
                public void onClose(AtmosphereResourceEvent event) {
                    cancelF(request);
                }
            });
        } else {
            return Action.CONTINUE;
        }
        final AsyncIOWriter writer = response.getAsyncIOWriter();
        if (!Utils.resumableTransport(r.transport()) && AtmosphereInterceptorWriter.class.isAssignableFrom(writer.getClass()) && request.getAttribute(INTERCEPTOR_ADDED) == null) {
            AtmosphereInterceptorWriter.class.cast(writer).interceptor(new AsyncIOInterceptorAdapter() {

                @Override
                public byte[] transformPayload(AtmosphereResponse response, byte[] responseDraft, byte[] data) throws IOException {
                    cancelF(request);
                    return responseDraft;
                }

                @Override
                public void postPayload(final AtmosphereResponse response, byte[] data, int offset, int length) {
                    logger.trace("Scheduling heartbeat for {}", r.uuid());
                    clock(interval, r, request, response);
                }
            });
            request.setAttribute(INTERCEPTOR_ADDED, Boolean.TRUE);
        }
    }
    return Action.CONTINUE;
}

Example 3 with AsyncIOWriter

use of org.atmosphere.runtime.AsyncIOWriter in project atmosphere by Atmosphere.

the class PaddingAtmosphereInterceptor method inspect.

@Override
public Action inspect(final AtmosphereResource r) {
    if (Utils.webSocketMessage(r))
        return Action.CONTINUE;
    final AtmosphereResponse response = r.getResponse();
    final AtmosphereRequest request = r.getRequest();
    String uuid = request.getHeader(HeaderConfig.X_ATMOSPHERE_TRACKING_ID);
    boolean padding = r.transport().equals(TRANSPORT.STREAMING) || r.transport().equals(TRANSPORT.LONG_POLLING);
    if (uuid != null && !uuid.equals("0") && r.transport().equals(TRANSPORT.WEBSOCKET) && request.getAttribute(INJECTED_ATMOSPHERE_RESOURCE) != null) {
        padding = true;
    }
    if (padding) {
        r.addEventListener(new ForcePreSuspend(response));
        super.inspect(r);
        AsyncIOWriter writer = response.getAsyncIOWriter();
        if (AtmosphereInterceptorWriter.class.isAssignableFrom(writer.getClass())) {
            AtmosphereInterceptorWriter.class.cast(writer).interceptor(new AsyncIOInterceptorAdapter() {

                private void padding() {
                    if (!r.isSuspended()) {
                        writePadding(response);
                        request.setAttribute("paddingWritten", "true");
                    }
                }

                @Override
                public void prePayload(AtmosphereResponse response, byte[] data, int offset, int length) {
                    padding();
                }

                @Override
                public void postPayload(AtmosphereResponse response, byte[] data, int offset, int length) {
                }
            });
        } else {
            logger.warn("Unable to apply {}. Your AsyncIOWriter must implement {}", getClass().getName(), AtmosphereInterceptorWriter.class.getName());
        }
    }
    return Action.CONTINUE;
}

Example 4 with AsyncIOWriter

use of org.atmosphere.runtime.AsyncIOWriter in project atmosphere by Atmosphere.

the class SSEAtmosphereInterceptor method inspect.

@Override
public Action inspect(final AtmosphereResource r) {
    if (Utils.webSocketMessage(r))
        return Action.CONTINUE;
    final AtmosphereResponse response = r.getResponse();
    final AtmosphereRequest request = r.getRequest();
    String accept = request.getHeader("Accept") == null ? "text/plain" : request.getHeader("Accept").trim();
    if (r.transport().equals(AtmosphereResource.TRANSPORT.SSE) || contentType.equalsIgnoreCase(accept)) {
        super.inspect(r);
        r.addEventListener(new P(response));
        AsyncIOWriter writer = response.getAsyncIOWriter();
        if (AtmosphereInterceptorWriter.class.isAssignableFrom(writer.getClass())) {
            AtmosphereInterceptorWriter.class.cast(writer).interceptor(new AsyncIOInterceptorAdapter() {

                private boolean padding() {
                    if (!r.isSuspended()) {
                        return writePadding(response);
                    }
                    return false;
                }

                @Override
                public void prePayload(AtmosphereResponse response, byte[] data, int offset, int length) {
                    boolean noPadding = padding();
                    // In that case, we must pad/protocol indenendently of the state of the AtmosphereResource
                    if (!noPadding || r.getRequest().getAttribute(CALLBACK_JAVASCRIPT_PROTOCOL) != null) {
                        // write other meta info such as (id, event, etc)?
                        response.write(DATA, true);
                    }
                }

                @Override
                public byte[] transformPayload(AtmosphereResponse response, byte[] responseDraft, byte[] data) throws IOException {
                    boolean noPadding = padding();
                    // In that case, we must pad/protocol indenendently of the state of the AtmosphereResource
                    if (!noPadding || r.getRequest().getAttribute(CALLBACK_JAVASCRIPT_PROTOCOL) != null) {
                        if (isMultilineData(responseDraft)) {
                            // return a padded multiline-data
                            return encodeMultilineData(responseDraft);
                        }
                    }
                    return responseDraft;
                }

                @Override
                public void postPayload(AtmosphereResponse response, byte[] data, int offset, int length) {
                    // In that case, we must pad/protocol indenendently of the state of the AtmosphereResource
                    if (r.isSuspended() || r.getRequest().getAttribute(CALLBACK_JAVASCRIPT_PROTOCOL) != null || r.getRequest().getAttribute(CONTAINER_RESPONSE) != null) {
                        response.write(END, true);
                    }
                    /**
                         * When used with https://github.com/remy/polyfills/blob/master/EventSource.js , we
                         * resume after every message.
                         */
                    String ua = r.getRequest().getHeader("User-Agent");
                    if (ua != null && ua.contains("MSIE")) {
                        try {
                            response.flushBuffer();
                        } catch (IOException e) {
                            logger.trace("", e);
                        }
                        r.resume();
                    }
                }
            });
        } else {
            logger.warn("Unable to apply {}. Your AsyncIOWriter must implement {}", getClass().getName(), AtmosphereInterceptorWriter.class.getName());
        }
    }
    return Action.CONTINUE;
}

Example 5 with AsyncIOWriter

use of org.atmosphere.runtime.AsyncIOWriter in project atmosphere by Atmosphere.

the class WebSocket method transform.

protected byte[] transform(AtmosphereResponse response, byte[] b, int offset, int length) throws IOException {
    AsyncIOWriter a = response.getAsyncIOWriter();
    // NOTE #1961 for now, create a new buffer par transform call and release it after the transform call.
    //      Alternatively, we may cache the buffer in thread-local and use it while this thread invokes
    //      multiple writes and release it when this thread invokes the close method.
    ByteArrayAsyncWriter buffer = new ByteArrayAsyncWriter();
    try {
        response.asyncIOWriter(buffer);
        invokeInterceptor(response, b, offset, length);
        return buffer.stream().toByteArray();
    } finally {
        buffer.close(null);
        response.asyncIOWriter(a);
    }
}