working metadata parser

mapblockaccessor/logger.go

@@ -0,0 +1,10 @@
+package mapblockaccessor
+
+import (
+  "github.com/sirupsen/logrus"
+)
+
+var log *logrus.Entry
+func init(){
+	log = logrus.WithFields(logrus.Fields{"prefix": "mapblockaccessor"})
+}

mapblockaccessor/mapblockaccessor_test.go

@@ -7,6 +7,7 @@ import (
 	"mapserver/db"
 	"os"
 	"testing"
+	"github.com/sirupsen/logrus"
 )
 
 func copy(src, dst string) error {
@@ -55,6 +56,7 @@ func GetTestDatabase() db.DBAccessor {
 }
 
 func TestSimpleAccess(t *testing.T) {
+	logrus.SetLevel(logrus.DebugLevel)
 	a := GetTestDatabase()
 	cache := NewMapBlockAccessor(a)
 	mb, err := cache.GetMapBlock(coords.NewMapBlockCoords(0, 0, 0))

mapblockparser/logger.go

@@ -0,0 +1,10 @@
+package mapblockparser
+
+import (
+  "github.com/sirupsen/logrus"
+)
+
+var log *logrus.Entry
+func init(){
+	log = logrus.WithFields(logrus.Fields{"prefix": "mapblockaccessor"})
+}

mapblockparser/metadata.go

@@ -8,6 +8,7 @@ import (
 	"io"
 	"strconv"
 	"strings"
+	"github.com/sirupsen/logrus"
 )
 
 const (
@@ -49,9 +50,16 @@ func parseMetadata(mapblock *MapBlock, data []byte) (int, error) {
 
 	metadata := buf.Bytes()
 
+	log.WithFields(logrus.Fields{"metadata-length": len(metadata)}).Debug("Parsing metadata")
+
 	offset := 0
 	version := metadata[offset]
 
+	if version == 0 {
+		//No data?
+		return cr.Count, nil
+	}
+
 	if version != 2 {
 		return 0, errors.New("Wrong metadata version: " + strconv.Itoa(int(version)))
 	}