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authorNathan Dench <ndenc2@gmail.com>2019-05-24 15:16:44 +1000
committerNathan Dench <ndenc2@gmail.com>2019-05-24 15:16:44 +1000
commit107c1cdb09c575aa2f61d97f48d8587eb6bada4c (patch)
treeca7d008643efc555c388baeaf1d986e0b6b3e28c /vendor/google.golang.org/grpc/internal/envconfig/envconfig.go
parent844b5a68d8af4791755b8f0ad293cc99f5959183 (diff)
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Upgrade to 0.12
Diffstat (limited to 'vendor/google.golang.org/grpc/internal/envconfig/envconfig.go')
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diff --git a/vendor/google.golang.org/grpc/internal/envconfig/envconfig.go b/vendor/google.golang.org/grpc/internal/envconfig/envconfig.go
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1/*
2 *
3 * Copyright 2018 gRPC authors.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 */
18
19// Package envconfig contains grpc settings configured by environment variables.
20package envconfig
21
22import (
23 "os"
24 "strings"
25)
26
27const (
28 prefix = "GRPC_GO_"
29 retryStr = prefix + "RETRY"
30 requireHandshakeStr = prefix + "REQUIRE_HANDSHAKE"
31)
32
33// RequireHandshakeSetting describes the settings for handshaking.
34type RequireHandshakeSetting int
35
36const (
37 // RequireHandshakeHybrid (default, deprecated) indicates to not wait for
38 // handshake before considering a connection ready, but wait before
39 // considering successful.
40 RequireHandshakeHybrid RequireHandshakeSetting = iota
41 // RequireHandshakeOn (default after the 1.17 release) indicates to wait
42 // for handshake before considering a connection ready/successful.
43 RequireHandshakeOn
44 // RequireHandshakeOff indicates to not wait for handshake before
45 // considering a connection ready/successful.
46 RequireHandshakeOff
47)
48
49var (
50 // Retry is set if retry is explicitly enabled via "GRPC_GO_RETRY=on".
51 Retry = strings.EqualFold(os.Getenv(retryStr), "on")
52 // RequireHandshake is set based upon the GRPC_GO_REQUIRE_HANDSHAKE
53 // environment variable.
54 //
55 // Will be removed after the 1.18 release.
56 RequireHandshake RequireHandshakeSetting
57)
58
59func init() {
60 switch strings.ToLower(os.Getenv(requireHandshakeStr)) {
61 case "on":
62 default:
63 RequireHandshake = RequireHandshakeOn
64 case "off":
65 RequireHandshake = RequireHandshakeOff
66 case "hybrid":
67 // Will be removed after the 1.17 release.
68 RequireHandshake = RequireHandshakeHybrid
69 }
70}