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95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
/*
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*
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* Copyright 2017 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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// Package connectivity defines connectivity semantics.
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// For details, see https://github.com/grpc/grpc/blob/master/doc/connectivity-semantics-and-api.md.
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package connectivity
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import (
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"google.golang.org/grpc/grpclog"
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)
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var logger = grpclog.Component("core")
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// State indicates the state of connectivity.
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// It can be the state of a ClientConn or SubConn.
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type State int
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func (s State) String() string {
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switch s {
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case Idle:
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return "IDLE"
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case Connecting:
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return "CONNECTING"
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case Ready:
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return "READY"
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case TransientFailure:
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return "TRANSIENT_FAILURE"
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case Shutdown:
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return "SHUTDOWN"
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default:
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logger.Errorf("unknown connectivity state: %d", s)
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return "INVALID_STATE"
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}
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}
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const (
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// Idle indicates the ClientConn is idle.
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Idle State = iota
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// Connecting indicates the ClientConn is connecting.
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Connecting
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// Ready indicates the ClientConn is ready for work.
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Ready
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// TransientFailure indicates the ClientConn has seen a failure but expects to recover.
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TransientFailure
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// Shutdown indicates the ClientConn has started shutting down.
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Shutdown
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)
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// ServingMode indicates the current mode of operation of the server.
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//
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// Only xDS enabled gRPC servers currently report their serving mode.
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type ServingMode int
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const (
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// ServingModeStarting indicates that the server is starting up.
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ServingModeStarting ServingMode = iota
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// ServingModeServing indicates that the server contains all required
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// configuration and is serving RPCs.
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ServingModeServing
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// ServingModeNotServing indicates that the server is not accepting new
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// connections. Existing connections will be closed gracefully, allowing
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// in-progress RPCs to complete. A server enters this mode when it does not
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// contain the required configuration to serve RPCs.
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ServingModeNotServing
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)
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func (s ServingMode) String() string {
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switch s {
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case ServingModeStarting:
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return "STARTING"
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case ServingModeServing:
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return "SERVING"
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case ServingModeNotServing:
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return "NOT_SERVING"
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default:
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logger.Errorf("unknown serving mode: %d", s)
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return "INVALID_MODE"
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}
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}
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