Examples with View bftsmart.reconfiguration.views.View used on opensource projects

Example 1 with View

use of bftsmart.reconfiguration.views.View in project aware by bergerch.

the class ServiceProxy method invoke.

/**
 * This method sends a request to the replicas, and returns the related reply.
 * If the servers take more than invokeTimeout seconds the method returns null.
 * This method is thread-safe.
 *
 * @param request Request to be sent
 * @param reqType ORDERED_REQUEST/UNORDERED_REQUEST/UNORDERED_HASHED_REQUEST for normal requests, and RECONFIG for
 *        reconfiguration requests.
 *
 * @return The reply from the replicas related to request
 */
public byte[] invoke(byte[] request, TOMMessageType reqType) {
    try {
        canSendLock.lock();
        // Clean all statefull data to prepare for receiving next replies
        Arrays.fill(replies, null);
        receivedReplies = 0;
        response = null;
        replyQuorum = getReplyQuorum();
        // Send the request to the replicas, and get its ID
        reqId = generateRequestId(reqType);
        operationId = generateOperationId();
        requestType = reqType;
        replyServer = -1;
        hashResponseController = null;
        if (requestType == TOMMessageType.UNORDERED_HASHED_REQUEST) {
            replyServer = getRandomlyServerId();
            logger.debug("[" + this.getClass().getName() + "] replyServerId(" + replyServer + ") " + "pos(" + getViewManager().getCurrentViewPos(replyServer) + ")");
            hashResponseController = new HashResponseController(getViewManager().getCurrentViewPos(replyServer), getViewManager().getCurrentViewProcesses().length);
            TOMMessage sm = new TOMMessage(getProcessId(), getSession(), reqId, operationId, request, getViewManager().getCurrentViewId(), requestType);
            sm.setReplyServer(replyServer);
            TOMulticast(sm);
        } else {
            TOMulticast(request, reqId, operationId, reqType);
        }
        logger.debug("Sending request (" + reqType + ") with reqId=" + reqId);
        logger.debug("Expected number of matching replies: " + replyQuorum);
        // by the client side communication system
        try {
            if (reqType == TOMMessageType.UNORDERED_HASHED_REQUEST) {
                if (!this.sm.tryAcquire(invokeUnorderedHashedTimeout, TimeUnit.SECONDS)) {
                    logger.info("######## UNORDERED HASHED REQUEST TIMOUT ########");
                    canSendLock.unlock();
                    return invoke(request, TOMMessageType.ORDERED_REQUEST);
                }
            } else {
                if (!this.sm.tryAcquire(invokeTimeout, TimeUnit.SECONDS)) {
                    logger.info("###################TIMEOUT#######################");
                    logger.info("Reply timeout for reqId=" + reqId + ", Replies received: " + receivedReplies);
                    canSendLock.unlock();
                    return null;
                }
            }
        } catch (InterruptedException ex) {
            logger.error("Problem aquiring semaphore", ex);
        }
        logger.debug("Response extracted = " + response);
        byte[] ret = null;
        if (response == null) {
            // the response can be null if n-f replies are received but there isn't
            // a replyQuorum of matching replies
            logger.debug("Received n-f replies and no response could be extracted.");
            canSendLock.unlock();
            if (reqType == TOMMessageType.UNORDERED_REQUEST || reqType == TOMMessageType.UNORDERED_HASHED_REQUEST) {
                // invoke the operation again, whitout the read-only flag
                logger.debug("###################RETRY#######################");
                return invokeOrdered(request);
            } else {
                throw new RuntimeException("Received n-f replies without f+1 of them matching.");
            }
        } else {
            // ******* EDUARDO BEGIN **************//
            if (reqType == TOMMessageType.ORDERED_REQUEST) {
                // Reply to a normal request!
                if (response.getViewID() == getViewManager().getCurrentViewId()) {
                    // return the response
                    ret = response.getContent();
                } else {
                    // if(response.getViewID() > getViewManager().getCurrentViewId())
                    // updated view received
                    reconfigureTo((View) TOMUtil.getObject(response.getContent()));
                    canSendLock.unlock();
                    return invoke(request, reqType);
                }
            } else if (reqType == TOMMessageType.UNORDERED_REQUEST || reqType == TOMMessageType.UNORDERED_HASHED_REQUEST) {
                if (response.getViewID() == getViewManager().getCurrentViewId()) {
                    // return the response
                    ret = response.getContent();
                } else {
                    canSendLock.unlock();
                    return invoke(request, TOMMessageType.ORDERED_REQUEST);
                }
            } else {
                if (response.getViewID() > getViewManager().getCurrentViewId()) {
                    // Reply to a reconfigure request!
                    logger.debug("Reconfiguration request' reply received!");
                    Object r = TOMUtil.getObject(response.getContent());
                    if (r instanceof View) {
                        // did not executed the request because it is using an outdated view
                        reconfigureTo((View) r);
                        canSendLock.unlock();
                        return invoke(request, reqType);
                    } else if (r instanceof ReconfigureReply) {
                        // reconfiguration executed!
                        reconfigureTo(((ReconfigureReply) r).getView());
                        ret = response.getContent();
                    } else {
                        logger.debug("Unknown response type");
                    }
                } else {
                    logger.debug("Unexpected execution flow");
                }
            }
        }
        return ret;
    } finally {
        // always release lock
        if (canSendLock.isHeldByCurrentThread())
            canSendLock.unlock();
    }
}

Example 2 with View

use of bftsmart.reconfiguration.views.View in project aware by bergerch.

the class StateManager method enoughViews.

protected boolean enoughViews(View view) {
    Collection<View> views = senderViews.values();
    int counter = 0;
    for (View v : views) {
        if (view.equals(v)) {
            counter++;
        }
    }
    boolean result = counter > SVController.getQuorum();
    return result;
}

Example 3 with View

use of bftsmart.reconfiguration.views.View in project aware by bergerch.

the class ReconfigurationTest method run.

public void run(int id) {
    /* ServiceProxy proxy = new ServiceProxy(id);
        
        ReconfigureRequest request = new ReconfigureRequest(id);
        request.setProperty("f","1");
        
        System.out.println("Going to send a reconf!!!");
        
        byte[] reply = proxy.invoke(TOMUtil.getBytes(request), ReconfigurationManager.TOM_RECONFIG_REQUEST, false);
        
        ReconfigureReply r = (ReconfigureReply)TOMUtil.getObject(reply);*/
    Reconfiguration rec = new Reconfiguration(id, "", null);
    // rec.setReconfiguration(ReconfigurationManager.CHANGE_F,"1");
    rec.setF(2);
    ReconfigureReply r = rec.execute();
    View v = r.getView();
    System.out.println("New view f: " + v.getF());
    rec.close();
}

Example 4 with View

use of bftsmart.reconfiguration.views.View in project bftsmart by blockchain-jd-com.

the class ConsensusTest_ method createClient.

/**
 * 准备共识客户端
 */
public void createClient(int nodeNum) {
    TOMConfiguration config = loadClientConfig(nodeNum);
    latestView = new View(0, config.getInitialView(), config.getF(), addresses.toArray(new NodeNetwork[addresses.size()]));
    ViewStorage viewStorage = new MemoryBasedViewStorage(latestView);
    clientProxy = new AsynchServiceProxy(config, viewStorage);
    Random random = new Random();
    bytes = new byte[4];
    random.nextBytes(bytes);
}

Example 5 with View

use of bftsmart.reconfiguration.views.View in project bftsmart by blockchain-jd-com.

the class Synchronizer method startSynchronization.

// this method is called when a timeout occurs or when a STOP message is
// recevied
private synchronized void startSynchronization(LeaderRegencyPropose regencyPropose) {
    LOGGER.info("(Synchronizer.startSynchronization) [{}] -> I am proc {}, initialize synchr phase", this.execManager.getTOMLayer().getRealName(), controller.getStaticConf().getProcessId());
    // Ask to start the synchronizations phase if enough messages have been received
    // already
    final int proposedRegencyId = regencyPropose.getRegency().getId();
    // 如果此时已经处于选举进程，则不作后续处理；
    if (!lcManager.isInProgress()) {
        // 对非领导者而言，如果请求是有当前执政期的领导者节点主动触发的，并计入自己的一票；
        LeaderRegency currentRegency = lcManager.getCurrentRegency();
        if ((!tom.isLeader()) && regencyPropose.getSender() == currentRegency.getLeaderId() && regencyPropose.getRegency().getId() == currentRegency.getId() + 1) {
            // 这是来自当前执政期领导者的主动选举提议；
            // 进一步校验视图的一致性；
            // 基于当前视图预测下一个执政期（即：当前执政期Id + 1），校验预测结果与来自远程的领导者的提议是否一致；
            // 如果一致，则直接投赞成票，并主动发出 STOP_APPEND 消息；
            View currentView = controller.getCurrentView();
            LeaderRegencyPropose nextRegencyPropose = LeaderRegencyPropose.chooseFromView(currentRegency.getId() + 1, currentView, this.getCurrentId());
            if (regencyPropose.isViewEquals(currentView) && nextRegencyPropose.getRegency().getLeaderId() == regencyPropose.getRegency().getLeaderId()) {
                lcManager.addStop(nextRegencyPropose);
                // 发送 STOP_APPEND 消息；
                sendSTOP_APPEND(nextRegencyPropose);
            }
        }
        if (lcManager.isUpToBeginQuorum(proposedRegencyId)) {
            beginElection(regencyPropose);
        }
    }
    // Did the synchronization phase really started?
    // LCManager有两种状态：
    // 1: 进入“选举中”状态；
    // 2：在本次“选举周期”下并发地收到其它节点的 STOPDATA 消息，完成了本次轮选举；
    ElectionResult electionResult = lcManager.generateQuorumElectionResult(proposedRegencyId);
    if (lcManager.isInProgress(proposedRegencyId) && electionResult != null) {
        commitElection(proposedRegencyId);
    }
// End of: if (canSendStopData && lcManager.getNextReg() >
// lcManager.getLastReg());
}