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72 lines
2.1 KiB
Go
72 lines
2.1 KiB
Go
/*
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*
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* Copyright 2018 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 envconfig contains grpc settings configured by environment variables.
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package envconfig
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import (
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"os"
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"strings"
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)
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const (
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prefix = "GRPC_GO_"
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retryStr = prefix + "RETRY"
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requireHandshakeStr = prefix + "REQUIRE_HANDSHAKE"
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)
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// RequireHandshakeSetting describes the settings for handshaking.
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type RequireHandshakeSetting int
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const (
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// RequireHandshakeHybrid (default, deprecated) indicates to not wait for
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// handshake before considering a connection ready, but wait before
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// considering successful.
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RequireHandshakeHybrid RequireHandshakeSetting = iota
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// RequireHandshakeOn (default after the 1.17 release) indicates to wait
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// for handshake before considering a connection ready/successful.
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RequireHandshakeOn
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// RequireHandshakeOff indicates to not wait for handshake before
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// considering a connection ready/successful.
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RequireHandshakeOff
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)
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var (
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// Retry is set if retry is explicitly enabled via "GRPC_GO_RETRY=on".
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Retry = strings.EqualFold(os.Getenv(retryStr), "on")
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// RequireHandshake is set based upon the GRPC_GO_REQUIRE_HANDSHAKE
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// environment variable.
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//
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// Will be removed after the 1.18 release.
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RequireHandshake RequireHandshakeSetting
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)
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func init() {
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switch strings.ToLower(os.Getenv(requireHandshakeStr)) {
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case "on":
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fallthrough
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default:
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RequireHandshake = RequireHandshakeOn
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case "off":
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RequireHandshake = RequireHandshakeOff
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case "hybrid":
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// Will be removed after the 1.17 release.
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RequireHandshake = RequireHandshakeHybrid
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}
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}
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