remove shutdowncalled and itmut

db/db.go

@@ -8,7 +8,6 @@ import (
 	"encoding/hex"
 	"fmt"
 	"os"
-	"sync"
 	"time"
 
 	"github.com/lbryio/herald.go/db/prefixes"
@@ -61,11 +60,9 @@ type ReadOnlyDBColumnFamily struct {
 	FilteredStreams        map[string][]byte
 	FilteredChannels       map[string][]byte
 	OpenIterators          map[string][]chan struct{}
-	ItMut                  sync.RWMutex
 	Grp                    *stop.Group
 	ShutdownChan           chan struct{}
 	DoneChan               chan struct{}
-	ShutdownCalled         bool
 	Cleanup                func()
 }
 
@@ -606,9 +603,7 @@ func GetDBColumnFamilies(name string, secondayPath string, cfNames []string) (*R
 		Height:           0,
 		Headers:          nil,
 		OpenIterators:    make(map[string][]chan struct{}),
-		ItMut:            sync.RWMutex{},
 		ShutdownChan:     make(chan struct{}, 1),
-		ShutdownCalled:   false,
 		DoneChan:         make(chan struct{}, 1),
 	}
 
@@ -678,26 +673,7 @@ func (db *ReadOnlyDBColumnFamily) Unwind() {
 
 // Shutdown shuts down the db.
 func (db *ReadOnlyDBColumnFamily) Shutdown() {
-	db.ShutdownCalled = true
 	db.Grp.StopAndWait()
-	// log.Println("Sending message to ShutdownChan...")
-	// db.ShutdownChan <- struct{}{}
-	// log.Println("Locking iterator mutex...")
-	// db.ItMut.Lock()
-	// log.Println("Setting ShutdownCalled to true...")
-	// db.ShutdownCalled = true
-	// log.Println("Notifying iterators to shutdown...")
-	// for _, it := range db.OpenIterators {
-	// 	it[1] <- struct{}{}
-	// }
-	// log.Println("Waiting for iterators to shutdown...")
-	// for _, it := range db.OpenIterators {
-	// 	<-it[0]
-	// }
-	// log.Println("Unlocking iterator mutex...")
-	// db.ItMut.Unlock()
-	// log.Println("Sending message to DoneChan...")
-	// <-db.DoneChan
 	log.Println("Calling cleanup...")
 	db.Cleanup()
 	log.Println("Leaving Shutdown...")

db/db_test.go

@@ -7,7 +7,6 @@ import (
 	"log"
 	"os"
 	"strings"
-	"sync"
 	"testing"
 
 	dbpkg "github.com/lbryio/herald.go/db"
@@ -95,10 +94,8 @@ func OpenAndFillTmpDBColumnFamlies(filePath string) (*dbpkg.ReadOnlyDBColumnFami
 		Height:           0,
 		Headers:          nil,
 		OpenIterators:    make(map[string][]chan struct{}),
-		ItMut:            sync.RWMutex{},
 		ShutdownChan:     make(chan struct{}, 1),
 		DoneChan:         make(chan struct{}, 1),
-		ShutdownCalled:   false,
 	}
 
 	// err = dbpkg.ReadDBState(myDB) //TODO: Figure out right place for this