Hulk did something

[bytom/vapor.git] / vendor / google.golang.org / grpc / connectivity / connectivity.go

diff --git a/vendor/google.golang.org/grpc/connectivity/connectivity.go b/vendor/google.golang.org/grpc/connectivity/connectivity.go
new file mode 100644 (file)
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+++ b/vendor/google.golang.org/grpc/connectivity/connectivity.go
@@ -0,0 +1,72 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package connectivity defines connectivity semantics.
+// For details, see https://github.com/grpc/grpc/blob/master/doc/connectivity-semantics-and-api.md.
+// All APIs in this package are experimental.
+package connectivity
+
+import (
+       "golang.org/x/net/context"
+       "google.golang.org/grpc/grpclog"
+)
+
+// State indicates the state of connectivity.
+// It can be the state of a ClientConn or SubConn.
+type State int
+
+func (s State) String() string {
+       switch s {
+       case Idle:
+               return "IDLE"
+       case Connecting:
+               return "CONNECTING"
+       case Ready:
+               return "READY"
+       case TransientFailure:
+               return "TRANSIENT_FAILURE"
+       case Shutdown:
+               return "SHUTDOWN"
+       default:
+               grpclog.Errorf("unknown connectivity state: %d", s)
+               return "Invalid-State"
+       }
+}
+
+const (
+       // Idle indicates the ClientConn is idle.
+       Idle State = iota
+       // Connecting indicates the ClienConn is connecting.
+       Connecting
+       // Ready indicates the ClientConn is ready for work.
+       Ready
+       // TransientFailure indicates the ClientConn has seen a failure but expects to recover.
+       TransientFailure
+       // Shutdown indicates the ClientConn has started shutting down.
+       Shutdown
+)
+
+// Reporter reports the connectivity states.
+type Reporter interface {
+       // CurrentState returns the current state of the reporter.
+       CurrentState() State
+       // WaitForStateChange blocks until the reporter's state is different from the given state,
+       // and returns true.
+       // It returns false if <-ctx.Done() can proceed (ctx got timeout or got canceled).
+       WaitForStateChange(context.Context, State) bool
+}