mdb/mbigtable: refactor to use new mctx/mlog/merr stuff

mdb/mbigtable/bigtable.go

@@ -7,10 +7,12 @@ import (
 	"strings"
 
 	"cloud.google.com/go/bigtable"
-	"github.com/mediocregopher/mediocre-go-lib/m"
 	"github.com/mediocregopher/mediocre-go-lib/mcfg"
+	"github.com/mediocregopher/mediocre-go-lib/mctx"
 	"github.com/mediocregopher/mediocre-go-lib/mdb"
+	"github.com/mediocregopher/mediocre-go-lib/merr"
 	"github.com/mediocregopher/mediocre-go-lib/mlog"
+	"github.com/mediocregopher/mediocre-go-lib/mrun"
 )
 
 func isErrAlreadyExists(err error) bool {
@@ -29,44 +31,60 @@ type Bigtable struct {
 	log *mlog.Logger
 }
 
-// Cfg configurs and returns a Bigtable instance which will be usable once
-// StartRun is called on the passed in Cfg instance.
+// MNew returns a Bigtable instance which will be initialized and configured
+// when the start event is triggered on ctx (see mrun.Start). The Bigtable
+// instance will have Close called on it when the stop event is triggered on ctx
+// (see mrun.Stop).
+//
+// gce is optional and can be passed in if there's an existing gce object which
+// should be used, otherwise a new one will be created with mdb.MGCE.
 //
 // defaultInstance can be given as the instance name to use as the default
 // parameter value. If empty the parameter will be required to be set.
-func Cfg(cfg *mcfg.Cfg, defaultInstance string) *Bigtable {
-	cfg = cfg.Child("bigtable")
-	var bt Bigtable
-	bt.gce = mdb.CfgGCE(cfg)
-	bt.log = m.Log(cfg, &bt)
+func MNew(ctx mctx.Context, gce *mdb.GCE, defaultInstance string) *Bigtable {
+	if gce == nil {
+		gce = mdb.MGCE(ctx, "")
+	}
+
+	ctx = mctx.ChildOf(ctx, "bigtable")
+	bt := &Bigtable{
+		gce: gce,
+		log: mlog.From(ctx),
+	}
+	bt.log.SetKV(bt)
 
 	var inst *string
 	{
-		name, descr := "instance", "name of the bigtable instance in the project to connect to"
+		const name, descr = "instance", "name of the bigtable instance in the project to connect to"
 		if defaultInstance != "" {
-			inst = cfg.ParamString(name, defaultInstance, descr)
+			inst = mcfg.String(ctx, name, defaultInstance, descr)
 		} else {
-			inst = cfg.ParamRequiredString(name, descr)
+			inst = mcfg.RequiredString(ctx, name, descr)
 		}
 	}
 
-	cfg.Start.Then(func(ctx context.Context) error {
+	mrun.OnStart(ctx, func(innerCtx mctx.Context) error {
 		bt.Instance = *inst
 		bt.log.Info("connecting to bigtable")
 		var err error
 		bt.Client, err = bigtable.NewClient(
-			ctx,
+			innerCtx,
 			bt.gce.Project, bt.Instance,
 			bt.gce.ClientOptions()...,
 		)
-		return mlog.ErrWithKV(err, &bt)
+		return merr.WithKV(err, bt.KV())
 	})
-	return &bt
+	mrun.OnStop(ctx, func(mctx.Context) error {
+		return bt.Client.Close()
+	})
+	return bt
 }
 
 // KV implements the mlog.KVer interface.
-func (bt *Bigtable) KV() mlog.KV {
-	return bt.gce.KV().Set("instance", bt.Instance)
+func (bt *Bigtable) KV() map[string]interface{} {
+	kv := bt.gce.KV()
+	kv["bigtableInstance"] = bt.Instance
+	return kv
 }
 
 // EnsureTable ensures that the given table exists and has (at least) the given
@@ -74,20 +92,20 @@ func (bt *Bigtable) KV() mlog.KV {
 //
 // This method requires admin privileges on the bigtable instance.
 func (bt *Bigtable) EnsureTable(ctx context.Context, name string, colFams ...string) error {
-	kv := bt.KV().Set("table", name)
+	kv := mlog.KV{"bigtableTable": name}
 	bt.log.Info("ensuring table", kv)
 
 	bt.log.Debug("creating admin client", kv)
 	adminClient, err := bigtable.NewAdminClient(ctx, bt.gce.Project, bt.Instance)
 	if err != nil {
-		return mlog.ErrWithKV(err, kv)
+		return merr.WithKV(err, bt.KV(), kv.KV())
 	}
 	defer adminClient.Close()
 
 	bt.log.Debug("creating bigtable table (if needed)", kv)
 	err = adminClient.CreateTable(ctx, name)
 	if err != nil && !isErrAlreadyExists(err) {
-		return mlog.ErrWithKV(err, kv)
+		return merr.WithKV(err, bt.KV(), kv.KV())
 	}
 
 	for _, colFam := range colFams {
@@ -95,7 +113,7 @@ func (bt *Bigtable) EnsureTable(ctx context.Context, name string, colFams ...str
 		bt.log.Debug("creating bigtable column family (if needed)", kv)
 		err := adminClient.CreateColumnFamily(ctx, name, colFam)
 		if err != nil && !isErrAlreadyExists(err) {
-			return mlog.ErrWithKV(err, kv)
+			return merr.WithKV(err, bt.KV(), kv.KV())
 		}
 	}
 

mdb/mbigtable/bigtable_test.go

@@ -1,37 +1,28 @@
 package mbigtable
 
 import (
-	"context"
 	. "testing"
 	"time"
 
 	"cloud.google.com/go/bigtable"
-	"github.com/mediocregopher/mediocre-go-lib/mcfg"
-	"github.com/mediocregopher/mediocre-go-lib/mdb"
 	"github.com/mediocregopher/mediocre-go-lib/mrand"
+	"github.com/mediocregopher/mediocre-go-lib/mtest"
 	"github.com/mediocregopher/mediocre-go-lib/mtest/massert"
 )
 
-var testBT *Bigtable
-
-func init() {
-	mdb.DefaultGCEProject = "test"
-	cfg := mcfg.New()
-	testBT = Cfg(cfg, "test")
-	cfg.StartTestRun()
-}
-
 func TestBasic(t *T) {
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-	defer cancel()
+	ctx := mtest.NewCtx()
+	mtest.SetEnv(ctx, "GCE_PROJECT", "testProject")
+	bt := MNew(ctx, nil, "testInstance")
 
+	mtest.Run(ctx, t, func() {
 		tableName := "test-" + mrand.Hex(8)
 		colFam := "colFam-" + mrand.Hex(8)
-	if err := testBT.EnsureTable(ctx, tableName, colFam); err != nil {
+		if err := bt.EnsureTable(ctx, tableName, colFam); err != nil {
 			t.Fatal(err)
 		}
 
-	table := testBT.Table(tableName)
+		table := bt.Table(tableName)
 		row := "row-" + mrand.Hex(8)
 		mut := bigtable.NewMutation()
 		mut.Set(colFam, "col", bigtable.Time(time.Now()), []byte("bar"))
@@ -49,4 +40,5 @@ func TestBasic(t *T) {
 			massert.Equal(colFam+":col", readColFam[0].Column),
 			massert.Equal([]byte("bar"), readColFam[0].Value),
 		))
+	})
 }