Examples of org.jgroups.util.Digest$Entry

org.jgroups.util.Digest
Class keeping track of the lowest and highest sequence numbers delivered, and the highest sequence numbers received, per member. This class is immutable

            view.readFrom(in);
        }


        // 2. digest
        if((flags & DIGEST_PRESENT) == DIGEST_PRESENT) {
            digest=new Digest(view.getMembersRaw());
            digest.readFrom(in, false);
        }


        // 3. fail_reason
        if((flags & FAIL_REASON_PRESENT) == FAIL_REASON_PRESENT)

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        if(requester == null)
            return;


        log.debug("%s: received state request from %s", local_addr, requester);


        Digest digest=null;
        if(isDigestNeeded()) {
            try {
                punchHoleFor(requester);
                closeBarrierAndSuspendStable();
                digest=(Digest)down_prot.down(Event.GET_DIGEST_EVT);

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    protected boolean isJoinResponseValid(final JoinRsp rsp) {
        if(rsp.getFailReason() != null)
            throw new SecurityException(rsp.getFailReason());


        Digest tmp_digest=rsp.getDigest();
        if(tmp_digest == null || tmp_digest.capacity() == 0) {
            log.warn("%s: digest is empty: digest=%s", gms.local_addr, rsp.getDigest());
            return false;
        }


        if(!tmp_digest.contains(gms.local_addr)) {
            log.error("%s: digest in JOIN_RSP does not contain myself; join response: %s", gms.local_addr, rsp);
            return false;
        }


        if(rsp.getView() == null) {

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    void becomeSingletonMember(Address mbr) {
        View new_view=View.create(mbr, 0, mbr); // create singleton view with mbr as only member


        // set the initial digest (since I'm the first member)
        Digest initial_digest=new Digest(mbr, 0, 0);
        gms.installView(new_view, initial_digest);
        gms.becomeCoordinator(); // not really necessary - installView() should do it


        gms.getUpProtocol().up(new Event(Event.BECOME_SERVER));
        gms.getDownProtocol().down(new Event(Event.BECOME_SERVER));

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            }
            else if(empty) {
                if(!flushProtocolInStack) {
                    down_prot.down(new Event(Event.CLOSE_BARRIER));
                }
                Digest digest=(Digest)down_prot.down(new Event(Event.GET_DIGEST));
                if(log.isDebugEnabled())
                    log.debug("digest is " + digest + ", getting application state");
                try {
                    requestApplicationStates(sender, digest, !flushProtocolInStack);
                }

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    /** Set the digest and the send the state up to the application */
    void handleStateRsp(StateHeader hdr, byte[] state) {
        Address sender=hdr.sender;
        Digest tmp_digest=hdr.my_digest;
        String id=hdr.state_id;
        Address state_sender=hdr.sender;


        waiting_for_state_response=false;
        if(isDigestNeeded()){

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        }
    }


    private void handleFlushReconcile(Message msg, FlushHeader fh) {
        Address requester = msg.getSrc();
        Digest reconcileDigest = fh.digest;


        if (log.isDebugEnabled())
            log.debug("Received FLUSH_RECONCILE at " + localAddress + " passing digest to NAKACK "
                            + reconcileDigest);

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                if (log.isDebugEnabled())
                    log.debug("Received START_FLUSH at " + localAddress
                                    + " but not sending BLOCK up");
            }


            Digest digest = (Digest) down_prot.down(new Event(Event.GET_DIGEST));
            FlushHeader fhr = new FlushHeader(FlushHeader.FLUSH_COMPLETED, fh.viewID,fh.flushParticipants);
            fhr.addDigest(digest);


            Message msg = new Message(flushStarter);
            msg.putHeader(getName(), fhr);

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    private void onFlushCompleted(Address address, final FlushHeader header) {
        Message msg = null;
        boolean needsReconciliationPhase = false;
        boolean collision = false;
        Digest digest = header.digest;
        synchronized (sharedLock) {
            flushCompletedMap.put(address, digest);
            flushCompleted = flushCompletedMap.size() >= flushMembers.size()
                            && !flushMembers.isEmpty()
                            && flushCompletedMap.keySet().containsAll(flushMembers);


            collision = !flushNotCompletedMap.isEmpty();
            if (log.isDebugEnabled())
                log.debug("At " + localAddress + " FLUSH_COMPLETED from " + address + ",completed "
                                + flushCompleted + ",flushMembers " + flushMembers
                                + ",flushCompleted " + flushCompletedMap.keySet());


            needsReconciliationPhase = enable_reconciliation && flushCompleted && hasVirtualSynchronyGaps();
            if (needsReconciliationPhase) {


                Digest d = findHighestSequences();
                msg = new Message();
                msg.setFlag(Message.OOB);
                FlushHeader fh = new FlushHeader(FlushHeader.FLUSH_RECONCILE, currentViewId(),
                                flushMembers);
                reconcileOks.clear();

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    }


    private boolean hasVirtualSynchronyGaps() {
        ArrayList<Digest> digests = new ArrayList<Digest>();
        digests.addAll(flushCompletedMap.values());
        Digest firstDigest = digests.get(0);
        List<Digest> remainingDigests = digests.subList(1, digests.size());
        for (Digest digest : remainingDigests) {
            Digest diff = firstDigest.difference(digest);
            if (diff != Digest.EMPTY_DIGEST) {
                return true;
            }
        }
        return false;

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