Examples of com.fasterxml.clustermate.service.NodeStateStore

Package com.fasterxml.clustermate.service

Examples of com.fasterxml.clustermate.service.NodeStateStore

com.fasterxml.clustermate.service.NodeStateStore
Base class that defines operations for storing and retrieving persistent Node state information. Store is used for persisting enough state regarding peer-to-peer operations to reduce amount of re-synchronization needed when node instances are restarted; and typically should use the strongest possible persistence and consistency guarantees that the backing data store implementation can offer: rate of operations should be low.

        }


        LOG.info("Node definition used for this host: {}, found {} configured peer nodes",
            localDef, nodeDefs.size());
        
        final NodeStateStore nodes = _stores.getNodeStore();
        // Next: load state definitions from BDB
        List<ActiveNodeState> storedStates = nodes.readAll(_keyspace);
        LOG.info("Read {} persisted node entries from local store", storedStates.size());


        // First things first: find and update node for local node
        ActiveNodeState localAct = _remove(storedStates, localDef.getAddress());
        if (localAct == null) { // need to create?
            if (!_stuff.isRunningTests()) {
                LOG.warn("No persisted entry for local node: will create and store one");
            }
            localAct = new ActiveNodeState(localDef, _startTime);
        } else {
            // index may have changed; if so, override
            if (localAct.getIndex() != localDef.getIndex()) {
                LOG.warn("Node index of current node changed from {} to {} -- may change key range!",
                        localAct.getIndex(), localDef.getIndex());
                localAct = localAct.withIndex(localDef.getIndex());
            }
        }
        // one more thing: force dummy update on restart as well (official startup time too)
        localAct = localAct.withLastUpdated(_startTime);
        // Either way, need to update persisted version
        nodes.upsertEntry(localAct);
        
        // then merge entries; create/delete orphans
        Map<IpAndPort,ActiveNodeState> activeState = _mergeStates(nodes,
                localAct, nodeDefs, storedStates);

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        }


        LOG.info("Node definition used for this host: {}, found {} configured peer nodes",
            localDef, nodeDefs.size());
        
        final NodeStateStore nodes = _stores.getNodeStore();
        // Next: load state definitions from BDB
        List<ActiveNodeState> storedStates = nodes.readAll(_keyspace);
        LOG.info("Read {} persisted node entries from local store", storedStates.size());


        // First things first: find and update node for local node
        ActiveNodeState localAct = _remove(storedStates, localDef.getAddress());
        if (localAct == null) { // need to create?
            if (!_stuff.isRunningTests()) {
                LOG.warn("No persisted entry for local node: will create and store one");
            }
            localAct = new ActiveNodeState(localDef, _startTime);
        } else {
            // index may have changed; if so, override
            if (localAct.getIndex() != localDef.getIndex()) {
                LOG.warn("Node index of current node changed from {} to {} -- may change key range!",
                        localAct.getIndex(), localDef.getIndex());
                localAct = localAct.withIndex(localDef.getIndex());
            }
        }
        // one more thing: force dummy update on restart as well (official startup time too)
        localAct = localAct.withLastUpdated(_startTime);
        // Either way, need to update persisted version
        nodes.upsertEntry(localAct);
        
        // then merge entries; create/delete orphans
        Map<IpAndPort,ActiveNodeState> activeState = _mergeStates(nodes,
                localAct, nodeDefs, storedStates);

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        final IpAndPort endpoint = nodeStatus.getAddress();
        /* Ok: let's also see if we have old state information in the
         * local DB. If we do, we may be able to avoid syncing from
         * the beginning of time; and/or obtain actual key range.
         */
        NodeStateStore stateStore = _stores.getNodeStore();
        ActiveNodeState initialStatus = new ActiveNodeState(_localState, nodeStatus,
                _timeMaster.currentTimeMillis());
        // TODO: should perhaps also find by index + range?
        ActiveNodeState oldState = stateStore.findEntry(endpoint);


        ClusterPeerImpl<K,E> peer = null;
        // First common case: info was persisted earlier; we just "unthaw it"
        if (oldState != null) {
            if (oldState.equals(initialStatus)) {

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Related Classes of com.fasterxml.clustermate.service.NodeStateStore

com.fasterxml.clustermate.service.cluster.ClusterBootstrapper

com.fasterxml.clustermate.service.cluster.ClusterViewByServerImpl

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