m: implement NewServiceCtx, use it in totp-proxy

This commit is contained in:
Brian Picciano 2019-02-02 19:27:28 -05:00
parent 15b84cb173
commit 6adfbdbcfb
3 changed files with 76 additions and 6 deletions

View File

@ -29,7 +29,7 @@ import (
)
func main() {
ctx := mctx.New()
ctx := m.NewServiceCtx()
logger := mlog.From(ctx)
cookieName := mcfg.String(ctx, "cookie-name", "_totp_proxy", "String to use as the name for cookies")
cookieTimeout := mcfg.Duration(ctx, "cookie-timeout", mtime.Duration{1 * time.Hour}, "Timeout for cookies")

32
m/m.go
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@ -24,11 +24,33 @@ func CfgSource() mcfg.Source {
}
}
// TODO Create a function, `NewService() mctx.Context` which preloads the
// context with log-level param. Will one day also add debug server. Problem
// comes because mlog isn't quite designed right and setting log-level from
// config won't propagate changes to child contexts which have already called
// mlog.From.
// NewServiceCtx returns a Context which should be used as the root Context when
// creating long running services, such as an RPC service or database.
//
// The returned Context will automatically handle setting up global
// configuration parameters like "log-level", as well as an http endpoint where
// debug information about the running process can be accessed.
//
// TODO set up the debug endpoint.
func NewServiceCtx() mctx.Context {
ctx := mctx.New()
// set up log level handling
logLevelStr := mcfg.String(ctx, "log-level", "info", "Maximum log level which will be printed.")
mrun.OnStart(ctx, func(mctx.Context) error {
logLevel := mlog.LevelFromString(*logLevelStr)
if logLevel == nil {
return merr.New("invalid log level", "log-level", *logLevelStr)
}
mlog.CtxSetAll(ctx, func(_ mctx.Context, logger *mlog.Logger) *mlog.Logger {
logger.SetMaxLevel(logLevel)
return logger
})
return nil
})
return ctx
}
// Run performs the work of populating configuration parameters, triggering the
// start event, waiting for an interrupt, and then triggering the stop event.

48
m/m_test.go Normal file
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@ -0,0 +1,48 @@
package m
import (
"encoding/json"
. "testing"
"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"
"github.com/mediocregopher/mediocre-go-lib/mtest/massert"
)
func TestServiceCtx(t *T) {
t.Run("log-level", func(t *T) {
ctx := NewServiceCtx()
// pull the Logger out of the ctx and set the Handler on it, so we can check
// the log level
var msgs []mlog.Message
logger := mlog.From(ctx)
logger.SetHandler(func(msg mlog.Message) error {
msgs = append(msgs, msg)
return nil
})
// create a child Context before running to ensure it the change propagates
// correctly.
ctxA := mctx.ChildOf(ctx, "A")
params := mcfg.ParamValues{{Name: "log-level", Value: json.RawMessage(`"DEBUG"`)}}
if err := mcfg.Populate(ctx, params); err != nil {
t.Fatal(err)
} else if err := mrun.Start(ctx); err != nil {
t.Fatal(err)
}
mlog.From(ctxA).Info("foo")
mlog.From(ctxA).Debug("bar")
massert.Fatal(t, massert.All(
massert.Len(msgs, 2),
massert.Equal(msgs[0].Level.String(), "INFO"),
massert.Equal(msgs[0].Description.String(), "(/A) foo"),
massert.Equal(msgs[1].Level.String(), "DEBUG"),
massert.Equal(msgs[1].Description.String(), "(/A) bar"),
))
})
}