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mdb: refactor to use new mctx stuff

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This commit is contained in:
Brian Picciano 2019-02-02 21:56:32 -05:00
parent f783b62f6f
commit 608eb90274
1 changed files with 22 additions and 17 deletions
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39
mdb/mdb.go
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@ -3,18 +3,13 @@
package mdb
import (
"context"
"github.com/mediocregopher/mediocre-go-lib/mcfg"
"github.com/mediocregopher/mediocre-go-lib/mctx"
"github.com/mediocregopher/mediocre-go-lib/mlog"
"github.com/mediocregopher/mediocre-go-lib/mrun"
"google.golang.org/api/option"
)
// DefaultGCEProject can be set before any of the Cfg* functions are called for
// GCE services, and will be used as the default value for the "project"
// configuration parameter for each service.
var DefaultGCEProject string
// GCE wraps configuration parameters commonly used for interacting with GCE
// services.
type GCE struct {
@ -22,14 +17,24 @@ type GCE struct {
CredFile string
}
// CfgGCE configures and returns a GCE instance which will be usable once Run is
// called on the passed in Cfg instance.
func CfgGCE(cfg *mcfg.Cfg) *GCE {
proj := cfg.ParamString("project", DefaultGCEProject, "name of GCE project")
credFile := cfg.ParamString("cred-file", "", "path to GCE credientials json file, if any")
// MGCE returns a GCE instance which will be initialized and configured when the
// start event is triggered on ctx (see mrun.Start). defaultProject is used as
// the default value for the mcfg parameter this function creates.
func MGCE(ctx mctx.Context, defaultProject string) *GCE {
ctx = mctx.ChildOf(ctx, "gce")
credFile := mcfg.String(ctx, "cred-file", "", "Path to GCE credientials JSON file, if any")
var project *string
const projectUsage = "Name of GCE project to use"
if defaultProject == "" {
project = mcfg.RequiredString(ctx, "project", projectUsage)
} else {
project = mcfg.String(ctx, "project", defaultProject, projectUsage)
}
var gce GCE
cfg.Start.Then(func(ctx context.Context) error {
gce.Project = *proj
mrun.OnStart(ctx, func(mctx.Context) error {
gce.Project = *project
gce.CredFile = *credFile
return nil
})
@ -46,9 +51,9 @@ func (gce *GCE) ClientOptions() []option.ClientOption {
return opts
}
// KV implements the mlog.KVer interface
func (gce *GCE) KV() mlog.KV {
// KV implements the mlog.KVer interface.
func (gce *GCE) KV() map[string]interface{} {
return mlog.KV{
"project": gce.Project,
"gceProject": gce.Project,
}
}