forked from uber/ringpop-go
/
meta.go
75 lines (63 loc) · 2.58 KB
/
meta.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
// Copyright (c) 2015 Uber Technologies, Inc.
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package thrift
import (
"errors"
"runtime"
"strings"
"github.com/uber/tchannel-go"
"github.com/uber/tchannel-go/thrift/gen-go/meta"
)
// HealthFunc is the interface for custom health endpoints.
// ok is whether the service health is OK, and message is optional additional information for the health result.
type HealthFunc func(ctx Context) (ok bool, message string)
// healthHandler implements the default health check enpoint.
type metaHandler struct {
healthFn HealthFunc
}
// newMetaHandler return a new HealthHandler instance.
func newMetaHandler() *metaHandler {
return &metaHandler{healthFn: defaultHealth}
}
// Health returns true as default Health endpoint.
func (h *metaHandler) Health(ctx Context) (*meta.HealthStatus, error) {
ok, message := h.healthFn(ctx)
if message == "" {
return &meta.HealthStatus{Ok: ok}, nil
}
return &meta.HealthStatus{Ok: ok, Message: &message}, nil
}
func (h *metaHandler) ThriftIDL(ctx Context) (*meta.ThriftIDLs, error) {
// TODO(prashant): Add thriftIDL to the generated code.
return nil, errors.New("unimplemented")
}
func (h *metaHandler) VersionInfo(ctx Context) (*meta.VersionInfo, error) {
return &meta.VersionInfo{
Language: "go",
LanguageVersion: strings.TrimPrefix(runtime.Version(), "go"),
Version: tchannel.VersionInfo,
}, nil
}
func defaultHealth(ctx Context) (bool, string) {
return true, ""
}
// SetHandler sets customized handler for health endpoint.
func (h *metaHandler) setHandler(f HealthFunc) {
h.healthFn = f
}