// makeBaseQueue returns a new instance of baseQueue with the
// specified shouldQueue function to determine which replicas to queue
// and maxSize to limit the growth of the queue. Note that
// maxSize doesn't prevent new replicas from being added, it just
// limits the total size. Higher priority replicas can still be
// added; their addition simply removes the lowest priority replica.
func makeBaseQueue(
name string,
impl queueImpl,
store *Store,
gossip *gossip.Gossip,
cfg queueConfig,
) baseQueue {
bq := baseQueue{
name: name,
impl: impl,
store: store,
gossip: gossip,
queueConfig: cfg,
incoming: make(chan struct{}, 1),
}
bq.mu.Locker = new(syncutil.Mutex)
bq.mu.replicas = map[roachpb.RangeID]*replicaItem{}
bq.ctx = context.TODO()
// Prepend [name] to logs.
bq.ctx = log.WithLogTag(bq.ctx, name, nil)
bq.ctx = log.WithEventLog(bq.ctx, "queue", name)
bq.processMu = new(syncutil.Mutex)
return bq
}
// New creates an instance of a gossip node.
func New(
ctx context.Context,
rpcContext *rpc.Context,
grpcServer *grpc.Server,
resolvers []resolver.Resolver,
stopper *stop.Stopper,
registry *metric.Registry,
) *Gossip {
ctx = log.WithEventLog(ctx, "gossip", "gossip")
g := &Gossip{
ctx: ctx,
Connected: make(chan struct{}),
rpcContext: rpcContext,
server: newServer(ctx, stopper, registry),
outgoing: makeNodeSet(minPeers, metric.NewGauge(MetaConnectionsOutgoingGauge)),
bootstrapping: map[string]struct{}{},
disconnected: make(chan *client, 10),
stalledCh: make(chan struct{}, 1),
stallInterval: defaultStallInterval,
bootstrapInterval: defaultBootstrapInterval,
cullInterval: defaultCullInterval,
nodeDescs: map[roachpb.NodeID]*roachpb.NodeDescriptor{},
resolverAddrs: map[util.UnresolvedAddr]resolver.Resolver{},
bootstrapAddrs: map[util.UnresolvedAddr]struct{}{},
}
stopper.AddCloser(stop.CloserFn(func() {
log.FinishEventLog(ctx)
}))
registry.AddMetric(g.outgoing.gauge)
g.clientsMu.breakers = map[string]*circuit.Breaker{}
log.Infof(g.ctx, "initial resolvers: %s", resolvers)
g.SetResolvers(resolvers)
g.mu.Lock()
// Add ourselves as a SystemConfig watcher.
g.mu.is.registerCallback(KeySystemConfig, g.updateSystemConfig)
// Add ourselves as a node descriptor watcher.
g.mu.is.registerCallback(MakePrefixPattern(KeyNodeIDPrefix), g.updateNodeAddress)
g.mu.Unlock()
RegisterGossipServer(grpcServer, g.server)
return g
}