Examples with DatabusRequest com.linkedin.databus2.core.container.request.DatabusRequest used on opensource projects

Example 21 with DatabusRequest

use of com.linkedin.databus2.core.container.request.DatabusRequest in project databus by linkedin.

the class ClientStateRequestProcessor method findV2Registration.

/**
   * Helper method to locate a databus V2 registration by its registration id. This method
   * can locate both top-level (registered by one of _dbusClient.registerXXX()) and
   * individual-partition (child) registration that are aggregated inside a top-level
   * MultiPartition registration.
   * 
   * Please note that this can traverse the registration tree which is 1 level deep. In
   * other words, it will not work when we have MultiPartition registrations aggregated
   * inside another MultiPartition registrations.
   * 
   * @param regId
   *          Registration Id to be located
   * @param request
   *          Databus Request corresponding to the REST call.
   * @return
   * @throws RequestProcessingException
   *           when the registration is not found.
   */
private DatabusRegistration findV2Registration(DatabusRequest request, String prefix) throws RequestProcessingException {
    String category = request.getParams().getProperty(DatabusRequest.PATH_PARAM_NAME);
    String registrationIdStr = category.substring(prefix.length());
    RegistrationId regId = new RegistrationId(registrationIdStr);
    Collection<DatabusRegistration> regs = _client.getAllRegistrations();
    if (null != regs) {
        for (DatabusRegistration r : regs) {
            if (regId.equals(r.getRegistrationId())) {
                return r;
            }
            /**
         * Important Note: There is an important implementation difference on which
         * registrations are stored in the global registration data-structure maintained
         * by the client (DatabusHttp[V3]ClientImpls) between V2 and V3.
         * 
         * 1. In the case of V2, only top-level registrations are stored in the global
         * data-structure (DatabusHttpClientImpl.regList 2. In the case of V3, all
         * registrations are stored in the global data-structure.
         * 
         * In the case of V3, this is needed so that all registrations can act on the
         * relay external view change. This can be refactored in the future by moving the
         * relay-external view change to registration impl ( reduce the complexity in
         * ClientImpl ). The V2 implementation did not have this logic and was following a
         * more intuitive structure of preserving the hierarchy. The below code handles
         * the discrepancy for V2.
         */
            if (r instanceof DatabusMultiPartitionRegistration) {
                Map<DbusPartitionInfo, DatabusRegistration> childRegs = ((DatabusMultiPartitionRegistration) r).getPartitionRegs();
                for (Entry<DbusPartitionInfo, DatabusRegistration> e : childRegs.entrySet()) {
                    if (regId.equals(e.getValue().getRegistrationId())) {
                        return e.getValue();
                    }
                }
            }
        }
    }
    throw new RequestProcessingException("Unable to find registration (" + regId + ") ");
}

Example 22 with DatabusRequest

use of com.linkedin.databus2.core.container.request.DatabusRequest in project databus by linkedin.

the class ClientStatsRequestProcessor method processOutboundHttpClientStats.

private void processOutboundHttpClientStats(DatabusRequest request) throws IOException, RequestProcessingException {
    String category = request.getParams().getProperty(DatabusRequest.PATH_PARAM_NAME);
    String client = category.substring(INBOUND_HTTP_RELAYS_PREFIX.length());
    DbusHttpTotalStats clientStats = _client.getHttpStatsCollector().getPeerStats(client);
    if (null == clientStats) {
        throw new InvalidRequestParamValueException(request.getName(), INBOUND_HTTP_RELAYS_PREFIX, client);
    }
    writeJsonObjectToResponse(clientStats, request);
    if (request.getRequestType() == HttpMethod.PUT || request.getRequestType() == HttpMethod.POST) {
        enableOrResetStatsMBean(clientStats, request);
    }
}

Example 23 with DatabusRequest

use of com.linkedin.databus2.core.container.request.DatabusRequest in project databus by linkedin.

the class DatabusRequestExecutionHandler method messageReceived.

@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
    if (e.getMessage() instanceof HttpRequest) {
        _httpRequest = (HttpRequest) e.getMessage();
        ctx.sendUpstream(e);
    }
    if (e.getMessage() instanceof DatabusRequest) {
        _dbusRequest = (DatabusRequest) e.getMessage();
        // If there is a physical partition stashed away, then restore it into the request now.
        if (ctx.getAttachment() != null && ctx.getAttachment() instanceof PhysicalPartition) {
            _dbusRequest.setCursorPartition((PhysicalPartition) (ctx.getAttachment()));
        }
        /*NettyStats nettyStats = _configManager.getNettyStats();
      boolean nettyStatsEnabled = nettyStats.isEnabled();
      CallCompletion callCompletion = nettyStatsEnabled ?
          nettyStats.getRequestHandler_writeResponse().startCall() :
          null;
      CallCompletion processRequestCompletion = null;*/
        try {
            if (LOG.isDebugEnabled()) {
                LOG.debug("Creating response for command [" + _dbusRequest.getId() + "] " + _dbusRequest.getName());
            }
            // Decide whether to close the connection or not.
            boolean keepAlive = isKeepAlive(_httpRequest);
            HttpResponse response = generateEmptyResponse();
            if (LOG.isDebugEnabled()) {
                //We are debugging -- let's add some more info to the response
                response.addHeader(DatabusHttpHeaders.DATABUS_REQUEST_ID_HEADER, Long.toString(_dbusRequest.getId()));
            }
            // Write the response.
            ChunkedBodyWritableByteChannel responseChannel = null;
            try {
                responseChannel = new ChunkedBodyWritableByteChannel(e.getChannel(), response);
                _dbusRequest.setResponseContent(responseChannel);
                if (LOG.isDebugEnabled()) {
                    LOG.debug("About to run command [" + _dbusRequest.getId() + "] " + _dbusRequest.getName());
                }
                //FIXME   DDS-305: Rework the netty stats collector to use event-based stats aggregation
                /*if (nettyStatsEnabled)
          {
            processRequestCompletion = nettyStats.getRequestHandler_processRequest().startCall();
          }*/
                Future<DatabusRequest> responseFuture = _processorRegistry.run(_dbusRequest);
                ServerContainer.RuntimeConfig config = _dbusRequest.getConfig();
                int timeoutMs = config.getRequestProcessingBudgetMs();
                boolean done = responseFuture.isDone();
                while (!done) {
                    try {
                        responseFuture.get(timeoutMs, TimeUnit.MILLISECONDS);
                        done = true;
                        ctx.setAttachment(_dbusRequest.getCursorPartition());
                    } catch (InterruptedException ie) {
                        done = responseFuture.isDone();
                    } catch (Exception ex) {
                        done = true;
                        _dbusRequest.setError(ex);
                        // On any error, clear any context saved. We will start afresh in a new request.
                        ctx.setAttachment(null);
                    //FIXME   DDS-305: Rework the netty stats collector to use event-based stats aggregation
                    /*if (null != processRequestCompletion)
              {
                processRequestCompletion.endCallWithError(ex);
                processRequestCompletion = null;
              }*/
                    }
                }
            } finally {
                if (null != responseChannel) {
                    if (LOG.isDebugEnabled()) {
                        //Add some more debugging info
                        long curTimeMs = System.currentTimeMillis();
                        responseChannel.addMetadata(DatabusHttpHeaders.DATABUS_REQUEST_LATENCY_HEADER, Long.toString(curTimeMs - _dbusRequest.getCreateTimestampMs()));
                    }
                    responseChannel.close();
                }
                if (null != _dbusRequest.getResponseThrowable()) {
                    ContainerStatisticsCollector statsCollector = _serverContainer.getContainerStatsCollector();
                    if (null != statsCollector) {
                        statsCollector.registerContainerError(_dbusRequest.getResponseThrowable());
                    }
                }
            }
            if (LOG.isDebugEnabled()) {
                LOG.debug("Done runing command [" + _dbusRequest.getId() + "] " + _dbusRequest.getName());
            }
            // Close the non-keep-alive or hard-failed connection after the write operation is done.
            if (!keepAlive || null == responseChannel) {
                e.getChannel().close();
            }
        //FIXME   DDS-305: Rework the netty stats collector to use event-based stats aggregation
        /*if (null != callCompletion)
        {
          callCompletion.endCall();
        }*/
        } catch (RuntimeException ex) {
            LOG.error("HttpRequestHandler.writeResponse error", ex);
            //FIXME   DDS-305: Rework the netty stats collector to use event-based stats aggregation
            /*if (null != callCompletion)
        {
          callCompletion.endCallWithError(ex);
        }*/
            ContainerStatisticsCollector statsCollector = _serverContainer.getContainerStatsCollector();
            if (null != statsCollector)
                statsCollector.registerContainerError(ex);
        }
    } else {
        //Pass on everything else
        ctx.sendUpstream(e);
    }
}

Example 24 with DatabusRequest

use of com.linkedin.databus2.core.container.request.DatabusRequest in project databus by linkedin.

the class UnknownCommandProcessor method run.

public Future<DatabusRequest> run(DatabusRequest request) {
    RequestProcessor processor = _processors.get(request.getName());
    if (null == processor) {
        processor = UNKOWN_COMMAND_PROCESSOR;
    }
    request.setProcessor(processor);
    ExecutorService procExecutor = processor.getExecutorService();
    if (null != procExecutor) {
        return procExecutor.submit(request);
    } else {
        request.call();
        return request;
    }
}

Example 25 with DatabusRequest

use of com.linkedin.databus2.core.container.request.DatabusRequest in project databus by linkedin.

the class ContainerOperationProcessor method process.

@Override
public DatabusRequest process(DatabusRequest request) throws IOException, RequestProcessingException {
    String action = request.getParams().getProperty(DatabusRequest.PATH_PARAM_NAME, "");
    if (action.equals("shutdown")) {
        String pid = Utils.getPid();
        String response = "{\"Container\":\"set-shutdown\",\"pid\":\"" + pid + "\"}";
        request.getResponseContent().write(ByteBuffer.wrap(response.getBytes(Charset.defaultCharset())));
        Thread runThread = new Thread(new Runnable() {

            @Override
            public void run() {
                _serverContainer.shutdown();
            }
        });
        runThread.start();
    } else if (action.equals("pause")) {
        _serverContainer.pause();
        request.getResponseContent().write(ByteBuffer.wrap("{\"Container\":\"set-pause\"}".getBytes(Charset.defaultCharset())));
    } else if (action.equals("resume")) {
        _serverContainer.resume();
        request.getResponseContent().write(ByteBuffer.wrap("{\"Container\":\"set-resume\"}".getBytes(Charset.defaultCharset())));
    } else if (action.equals("getpid")) {
        String pid = Utils.getPid();
        String response = "{\"pid\":\"" + pid + "\"}";
        request.getResponseContent().write(ByteBuffer.wrap(response.getBytes(Charset.defaultCharset())));
    } else {
        throw new InvalidRequestParamValueException(COMMAND_NAME, "request path", action);
    }
    return request;
}