diff options
Diffstat (limited to 'vendor/google.golang.org/grpc/balancer_conn_wrappers.go')
| -rw-r--r-- | vendor/google.golang.org/grpc/balancer_conn_wrappers.go | 68 |
1 files changed, 60 insertions, 8 deletions
diff --git a/vendor/google.golang.org/grpc/balancer_conn_wrappers.go b/vendor/google.golang.org/grpc/balancer_conn_wrappers.go index e4a95fd..c23f817 100644 --- a/vendor/google.golang.org/grpc/balancer_conn_wrappers.go +++ b/vendor/google.golang.org/grpc/balancer_conn_wrappers.go @@ -19,6 +19,7 @@ package grpc import ( + "fmt" "sync" "google.golang.org/grpc/balancer" @@ -73,7 +74,7 @@ func (b *scStateUpdateBuffer) load() { } } -// get returns the channel that receives a recvMsg in the buffer. +// get returns the channel that the scStateUpdate will be sent to. // // Upon receiving, the caller should call load to send another // scStateChangeTuple onto the channel if there is any. @@ -96,6 +97,9 @@ type ccBalancerWrapper struct { stateChangeQueue *scStateUpdateBuffer resolverUpdateCh chan *resolverUpdate done chan struct{} + + mu sync.Mutex + subConns map[*acBalancerWrapper]struct{} } func newCCBalancerWrapper(cc *ClientConn, b balancer.Builder, bopts balancer.BuildOptions) *ccBalancerWrapper { @@ -104,21 +108,34 @@ func newCCBalancerWrapper(cc *ClientConn, b balancer.Builder, bopts balancer.Bui stateChangeQueue: newSCStateUpdateBuffer(), resolverUpdateCh: make(chan *resolverUpdate, 1), done: make(chan struct{}), + subConns: make(map[*acBalancerWrapper]struct{}), } go ccb.watcher() ccb.balancer = b.Build(ccb, bopts) return ccb } -// watcher balancer functions sequencially, so the balancer can be implemeneted +// watcher balancer functions sequentially, so the balancer can be implemented // lock-free. func (ccb *ccBalancerWrapper) watcher() { for { select { case t := <-ccb.stateChangeQueue.get(): ccb.stateChangeQueue.load() + select { + case <-ccb.done: + ccb.balancer.Close() + return + default: + } ccb.balancer.HandleSubConnStateChange(t.sc, t.state) case t := <-ccb.resolverUpdateCh: + select { + case <-ccb.done: + ccb.balancer.Close() + return + default: + } ccb.balancer.HandleResolvedAddrs(t.addrs, t.err) case <-ccb.done: } @@ -126,6 +143,13 @@ func (ccb *ccBalancerWrapper) watcher() { select { case <-ccb.done: ccb.balancer.Close() + ccb.mu.Lock() + scs := ccb.subConns + ccb.subConns = nil + ccb.mu.Unlock() + for acbw := range scs { + ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain) + } return default: } @@ -165,31 +189,54 @@ func (ccb *ccBalancerWrapper) handleResolvedAddrs(addrs []resolver.Address, err } func (ccb *ccBalancerWrapper) NewSubConn(addrs []resolver.Address, opts balancer.NewSubConnOptions) (balancer.SubConn, error) { - grpclog.Infof("ccBalancerWrapper: new subconn: %v", addrs) + if len(addrs) <= 0 { + return nil, fmt.Errorf("grpc: cannot create SubConn with empty address list") + } + ccb.mu.Lock() + defer ccb.mu.Unlock() + if ccb.subConns == nil { + return nil, fmt.Errorf("grpc: ClientConn balancer wrapper was closed") + } ac, err := ccb.cc.newAddrConn(addrs) if err != nil { return nil, err } acbw := &acBalancerWrapper{ac: ac} + acbw.ac.mu.Lock() ac.acbw = acbw + acbw.ac.mu.Unlock() + ccb.subConns[acbw] = struct{}{} return acbw, nil } func (ccb *ccBalancerWrapper) RemoveSubConn(sc balancer.SubConn) { - grpclog.Infof("ccBalancerWrapper: removing subconn") acbw, ok := sc.(*acBalancerWrapper) if !ok { return } + ccb.mu.Lock() + defer ccb.mu.Unlock() + if ccb.subConns == nil { + return + } + delete(ccb.subConns, acbw) ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain) } func (ccb *ccBalancerWrapper) UpdateBalancerState(s connectivity.State, p balancer.Picker) { - grpclog.Infof("ccBalancerWrapper: updating state and picker called by balancer: %v, %p", s, p) + ccb.mu.Lock() + defer ccb.mu.Unlock() + if ccb.subConns == nil { + return + } ccb.cc.csMgr.updateState(s) ccb.cc.blockingpicker.updatePicker(p) } +func (ccb *ccBalancerWrapper) ResolveNow(o resolver.ResolveNowOption) { + ccb.cc.resolveNow(o) +} + func (ccb *ccBalancerWrapper) Target() string { return ccb.cc.target } @@ -202,9 +249,12 @@ type acBalancerWrapper struct { } func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) { - grpclog.Infof("acBalancerWrapper: UpdateAddresses called with %v", addrs) acbw.mu.Lock() defer acbw.mu.Unlock() + if len(addrs) <= 0 { + acbw.ac.tearDown(errConnDrain) + return + } if !acbw.ac.tryUpdateAddrs(addrs) { cc := acbw.ac.cc acbw.ac.mu.Lock() @@ -228,9 +278,11 @@ func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) { return } acbw.ac = ac + ac.mu.Lock() ac.acbw = acbw + ac.mu.Unlock() if acState != connectivity.Idle { - ac.connect(false) + ac.connect() } } } @@ -238,7 +290,7 @@ func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) { func (acbw *acBalancerWrapper) Connect() { acbw.mu.Lock() defer acbw.mu.Unlock() - acbw.ac.connect(false) + acbw.ac.connect() } func (acbw *acBalancerWrapper) getAddrConn() *addrConn { |