Java DatabaseDescriptor.isReplacing方法代码示例

import org.apache.cassandra.config.DatabaseDescriptor; //导入方法依赖的package包/类
private void bootstrap(Collection<Token> tokens)
{
    isBootstrapMode = true;
    SystemKeyspace.updateTokens(tokens); // DON'T use setToken, that makes us part of the ring locally which is incorrect until we are done bootstrapping
    if (!DatabaseDescriptor.isReplacing())
    {
        // if not an existing token then bootstrap
        List<Pair<ApplicationState, VersionedValue>> states = new ArrayList<Pair<ApplicationState, VersionedValue>>();
        states.add(Pair.create(ApplicationState.TOKENS, valueFactory.tokens(tokens)));
        states.add(Pair.create(ApplicationState.STATUS, valueFactory.bootstrapping(tokens)));
        Gossiper.instance.addLocalApplicationStates(states);
        setMode(Mode.JOINING, "sleeping " + RING_DELAY + " ms for pending range setup", true);
        Uninterruptibles.sleepUninterruptibly(RING_DELAY, TimeUnit.MILLISECONDS);
    }
    else
    {
        // Dont set any state for the node which is bootstrapping the existing token...
        tokenMetadata.updateNormalTokens(tokens, FBUtilities.getBroadcastAddress());
        SystemKeyspace.removeEndpoint(DatabaseDescriptor.getReplaceAddress());
    }
    if (!Gossiper.instance.seenAnySeed())
        throw new IllegalStateException("Unable to contact any seeds!");
    setMode(Mode.JOINING, "Starting to bootstrap...", true);
    new BootStrapper(FBUtilities.getBroadcastAddress(), tokens, tokenMetadata).bootstrap(); // handles token update
    logger.info("Bootstrap completed! for the tokens {}", tokens);
}
 

import org.apache.cassandra.config.DatabaseDescriptor; //导入方法依赖的package包/类
private void bootstrap(Collection<Token> tokens)
{
    isBootstrapMode = true;
    SystemKeyspace.updateTokens(tokens); // DON'T use setToken, that makes us part of the ring locally which is incorrect until we are done bootstrapping
    if (!DatabaseDescriptor.isReplacing())
    {
        // if not an existing token then bootstrap
        // order is important here, the gossiper can fire in between adding these two states.  It's ok to send TOKENS without STATUS, but *not* vice versa.
        Gossiper.instance.addLocalApplicationState(ApplicationState.TOKENS, valueFactory.tokens(tokens));
        Gossiper.instance.addLocalApplicationState(ApplicationState.STATUS,
                                                   valueFactory.bootstrapping(tokens));
        setMode(Mode.JOINING, "sleeping " + RING_DELAY + " ms for pending range setup", true);
        Uninterruptibles.sleepUninterruptibly(RING_DELAY, TimeUnit.MILLISECONDS);
    }
    else
    {
        // Dont set any state for the node which is bootstrapping the existing token...
        tokenMetadata.updateNormalTokens(tokens, FBUtilities.getBroadcastAddress());
    }
    if (!Gossiper.instance.seenAnySeed())
        throw new IllegalStateException("Unable to contact any seeds!");
    setMode(Mode.JOINING, "Starting to bootstrap...", true);
    new BootStrapper(FBUtilities.getBroadcastAddress(), tokens, tokenMetadata).bootstrap(); // handles token update
    logger.info("Bootstrap completed! for the tokens {}", tokens);
}
 

import org.apache.cassandra.config.DatabaseDescriptor; //导入方法依赖的package包/类
private boolean useStrictSourcesForRanges(String keyspaceName)
{
    AbstractReplicationStrategy strat = Keyspace.open(keyspaceName).getReplicationStrategy();
    return !DatabaseDescriptor.isReplacing()
            && useStrictConsistency
            && tokens != null
            && metadata.getAllEndpoints().size() != strat.getReplicationFactor();
}
 

import org.apache.cassandra.config.DatabaseDescriptor; //导入方法依赖的package包/类
private void prepareToJoin() throws ConfigurationException
{
    if (!joined)
    {
        Map<ApplicationState, VersionedValue> appStates = new HashMap<>();

        if (DatabaseDescriptor.isReplacing() && !(Boolean.parseBoolean(System.getProperty("cassandra.join_ring", "true"))))
            throw new ConfigurationException("Cannot set both join_ring=false and attempt to replace a node");
        if (DatabaseDescriptor.getReplaceTokens().size() > 0 || DatabaseDescriptor.getReplaceNode() != null)
            throw new RuntimeException("Replace method removed; use cassandra.replace_address instead");
        if (DatabaseDescriptor.isReplacing())
        {
            if (SystemKeyspace.bootstrapComplete())
                throw new RuntimeException("Cannot replace address with a node that is already bootstrapped");
            if (!DatabaseDescriptor.isAutoBootstrap())
                throw new RuntimeException("Trying to replace_address with auto_bootstrap disabled will not work, check your configuration");
            bootstrapTokens = prepareReplacementInfo();
            appStates.put(ApplicationState.TOKENS, valueFactory.tokens(bootstrapTokens));
            appStates.put(ApplicationState.STATUS, valueFactory.hibernate(true));
        }
        else if (shouldBootstrap())
        {
            checkForEndpointCollision();
        }

        // have to start the gossip service before we can see any info on other nodes.  this is necessary
        // for bootstrap to get the load info it needs.
        // (we won't be part of the storage ring though until we add a counterId to our state, below.)
        // Seed the host ID-to-endpoint map with our own ID.
        UUID localHostId = SystemKeyspace.getLocalHostId();
        getTokenMetadata().updateHostId(localHostId, FBUtilities.getBroadcastAddress());
        appStates.put(ApplicationState.NET_VERSION, valueFactory.networkVersion());
        appStates.put(ApplicationState.HOST_ID, valueFactory.hostId(localHostId));
        appStates.put(ApplicationState.RPC_ADDRESS, valueFactory.rpcaddress(DatabaseDescriptor.getBroadcastRpcAddress()));
        appStates.put(ApplicationState.RELEASE_VERSION, valueFactory.releaseVersion());
        logger.info("Starting up server gossip");
        Gossiper.instance.register(this);
        Gossiper.instance.start(SystemKeyspace.incrementAndGetGeneration(), appStates); // needed for node-ring gathering.
        // gossip snitch infos (local DC and rack)
        gossipSnitchInfo();
        // gossip Schema.emptyVersion forcing immediate check for schema updates (see MigrationManager#maybeScheduleSchemaPull)
        Schema.instance.updateVersionAndAnnounce(); // Ensure we know our own actual Schema UUID in preparation for updates

        if (!MessagingService.instance().isListening())
            MessagingService.instance().listen(FBUtilities.getLocalAddress());
        LoadBroadcaster.instance.startBroadcasting();

        HintedHandOffManager.instance.start();
        BatchlogManager.instance.start();
    }
}