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

Example 1 with AtmosphereInterceptorWriter

use of org.atmosphere.runtime.AtmosphereInterceptorWriter 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 AtmosphereInterceptorWriter

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

the class SimpleRestInterceptor method inspect.

@Override
public Action inspect(final AtmosphereResource r) {
    if (AtmosphereResource.TRANSPORT.WEBSOCKET != r.transport() && AtmosphereResource.TRANSPORT.SSE != r.transport() && AtmosphereResource.TRANSPORT.POLLING != r.transport()) {
        LOG.debug("Skipping for non websocket request");
        return Action.CONTINUE;
    }
    if (AtmosphereResource.TRANSPORT.POLLING == r.transport()) {
        final String saruuid = (String) r.getRequest().getAttribute(ApplicationConfig.SUSPENDED_ATMOSPHERE_RESOURCE_UUID);
        final AtmosphereResponse suspendedResponse = suspendedResponses.get(saruuid);
        LOG.debug("Attaching a proxy writer to suspended response");
        r.getResponse().asyncIOWriter(new AtmosphereInterceptorWriter() {

            @Override
            public AsyncIOWriter write(AtmosphereResponse r, String data) throws IOException {
                suspendedResponse.write(data);
                suspendedResponse.flushBuffer();
                return this;
            }

            @Override
            public AsyncIOWriter write(AtmosphereResponse r, byte[] data) throws IOException {
                suspendedResponse.write(data);
                suspendedResponse.flushBuffer();
                return this;
            }

            @Override
            public AsyncIOWriter write(AtmosphereResponse r, byte[] data, int offset, int length) throws IOException {
                suspendedResponse.write(data, offset, length);
                suspendedResponse.flushBuffer();
                return this;
            }

            @Override
            public void close(AtmosphereResponse response) throws IOException {
            }
        });
        // REVISIT we need to keep this response's asyncwriter alive so that data can be written to the
        //   suspended response, but investigate if there is a better alternative.
        r.getResponse().destroyable(false);
        return Action.CONTINUE;
    }
    r.addEventListener(new AtmosphereResourceEventListenerAdapter() {

        @Override
        public void onSuspend(AtmosphereResourceEvent event) {
            final String srid = (String) event.getResource().getRequest().getAttribute(ApplicationConfig.SUSPENDED_ATMOSPHERE_RESOURCE_UUID);
            LOG.debug("Registrering suspended resource: {}", srid);
            suspendedResponses.put(srid, event.getResource().getResponse());
            AsyncIOWriter writer = event.getResource().getResponse().getAsyncIOWriter();
            if (writer == null) {
                writer = new AtmosphereInterceptorWriter();
                r.getResponse().asyncIOWriter(writer);
            }
            if (writer instanceof AtmosphereInterceptorWriter) {
                ((AtmosphereInterceptorWriter) writer).interceptor(interceptor);
            }
        }

        @Override
        public void onDisconnect(AtmosphereResourceEvent event) {
            super.onDisconnect(event);
            final String srid = (String) event.getResource().getRequest().getAttribute(ApplicationConfig.SUSPENDED_ATMOSPHERE_RESOURCE_UUID);
            LOG.debug("Unregistrering suspended resource: {}", srid);
            suspendedResponses.remove(srid);
        }
    });
    AtmosphereRequest request = r.getRequest();
    if (request.getAttribute(REQUEST_DISPATCHED) == null) {
        try {
            //REVISIT use a more efficient approach for the detached mode (i.e.,avoid reading the message into a string)
            // read the message entity and dispatch a service call
            String body = IOUtils.readEntirelyAsString(r).toString();
            LOG.debug("Request message: '{}'", body);
            if (body.length() == 0) {
                //TODO we might want to move this heartbeat scheduling after the handshake phase (if that is added)
                if ((AtmosphereResource.TRANSPORT.WEBSOCKET == r.transport() || AtmosphereResource.TRANSPORT.SSE == r.transport()) && request.getAttribute(HEARTBEAT_SCHEDULED) == null) {
                    r.suspend();
                    scheduleHeartbeat(r);
                    request.setAttribute(HEARTBEAT_SCHEDULED, "true");
                    return Action.SUSPEND;
                }
                return Action.CANCELLED;
            }
            AtmosphereRequest ar = createAtmosphereRequest(request, body);
            if (ar == null) {
                return Action.CANCELLED;
            }
            AtmosphereResponse response = r.getResponse();
            ar.localAttributes().put(REQUEST_DISPATCHED, "true");
            request.removeAttribute(FrameworkConfig.INJECTED_ATMOSPHERE_RESOURCE);
            response.request(ar);
            attachWriter(r);
            Action action = r.getAtmosphereConfig().framework().doCometSupport(ar, response);
            if (action.type() == Action.TYPE.SUSPEND) {
                ar.destroyable(false);
                response.destroyable(false);
            }
            return Action.CANCELLED;
        } catch (IOException | ServletException e) {
            LOG.error("Failed to process", e);
        }
    }
    return Action.CONTINUE;
}