CASSGO-29-refactor-packages-to-separate-fronend-api-to-backend-internal-api

Author: OleksiienkoMykyta

conn.go

@@ -1276,7 +1276,7 @@ func (c *Conn) prepareStatement(ctx context.Context, stmt string, tracer Tracer)
 				flight.preparedStatment = &preparedStatment{
 					// defensively copy as we will recycle the underlying buffer after we
 					// return.
-					id: copyBytes(x.preparedID),
+					id: internal.CopyBytes(x.preparedID),
 					// the type info's should _not_ have a reference to the framers read buffer,
 					// therefore we can just copy them directly.
 					request:  x.reqMeta,
@@ -1308,7 +1308,7 @@ func marshalQueryValue(typ TypeInfo, value interface{}, dst *queryValues) error
 		value = named.value
 	}
 
-	if _, ok := value.(unsetColumn); !ok {
+	if _, ok := value.(internal.UnsetColumn); !ok {
 		val, err := Marshal(typ, value)
 		if err != nil {
 			return err
@@ -1431,7 +1431,7 @@ func (c *Conn) executeQuery(ctx context.Context, qry *Query) *Iter {
 		if params.skipMeta {
 			if info != nil {
 				iter.meta = info.response
-				iter.meta.pagingState = copyBytes(x.meta.pagingState)
+				iter.meta.pagingState = internal.CopyBytes(x.meta.pagingState)
 			} else {
 				return &Iter{framer: framer, err: errors.New("gocql: did not receive metadata but prepared info is nil")}
 			}
@@ -1442,7 +1442,7 @@ func (c *Conn) executeQuery(ctx context.Context, qry *Query) *Iter {
 		if x.meta.morePages() && !qry.disableAutoPage {
 			newQry := new(Query)
 			*newQry = *qry
-			newQry.pageState = copyBytes(x.meta.pagingState)
+			newQry.pageState = internal.CopyBytes(x.meta.pagingState)
 			newQry.metrics = &queryMetrics{m: make(map[string]*hostMetrics)}
 
 			iter.next = &nextIter{

control.go

@@ -50,7 +50,7 @@ func init() {
 		panic(fmt.Sprintf("unable to seed random number generator: %v", err))
 	}
 
-	randr = rand.New(rand.NewSource(int64(readInt(b))))
+	randr = rand.New(rand.NewSource(int64(internal.ReadInt(b))))
 }
 
 const (

frame.go

@@ -28,6 +28,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"github.com/gocql/gocql/internal"
 	"io"
 	"io/ioutil"
 	"net"
@@ -36,16 +37,14 @@ import (
 	"time"
 )
 
-type unsetColumn struct{}
-
 // UnsetValue represents a value used in a query binding that will be ignored by Cassandra.
 //
 // By setting a field to the unset value Cassandra will ignore the write completely.
 // The main advantage is the ability to keep the same prepared statement even when you don't
 // want to update some fields, where before you needed to make another prepared statement.
 //
 // UnsetValue is only available when using the version 4 of the protocol.
-var UnsetValue = unsetColumn{}
+var UnsetValue = internal.UnsetColumn{}
 
 type namedValue struct {
 	name  string
@@ -331,10 +330,6 @@ var (
 
 const maxFrameHeaderSize = 9
 
-func readInt(p []byte) int32 {
-	return int32(p[0])<<24 | int32(p[1])<<16 | int32(p[2])<<8 | int32(p[3])
-}
-
 type frameHeader struct {
 	version  protoVersion
 	flags    byte
@@ -474,15 +469,15 @@ func readHeader(r io.Reader, p []byte) (head frameHeader, err error) {
 
 		head.stream = int(int16(p[2])<<8 | int16(p[3]))
 		head.op = frameOp(p[4])
-		head.length = int(readInt(p[5:]))
+		head.length = int(internal.ReadInt(p[5:]))
 	} else {
 		if len(p) != 8 {
 			return frameHeader{}, fmt.Errorf("not enough bytes to read header require 8 got: %d", len(p))
 		}
 
 		head.stream = int(int8(p[2]))
 		head.op = frameOp(p[3])
-		head.length = int(readInt(p[4:]))
+		head.length = int(internal.ReadInt(p[4:]))
 	}
 
 	return head, nil
@@ -647,7 +642,7 @@ func (f *framer) parseErrorFrame() frame {
 		stmtId := f.readShortBytes()
 		return &RequestErrUnprepared{
 			errorFrame:  errD,
-			StatementId: copyBytes(stmtId), // defensively copy
+			StatementId: internal.CopyBytes(stmtId), // defensively copy
 		}
 	case ErrCodeReadFailure:
 		res := &RequestErrReadFailure{
@@ -969,7 +964,7 @@ func (f *framer) parsePreparedMetadata() preparedMetadata {
 	}
 
 	if meta.flags&flagHasMorePages == flagHasMorePages {
-		meta.pagingState = copyBytes(f.readBytes())
+		meta.pagingState = internal.CopyBytes(f.readBytes())
 	}
 
 	if meta.flags&flagNoMetaData == flagNoMetaData {
@@ -1057,7 +1052,7 @@ func (f *framer) parseResultMetadata() resultMetadata {
 	meta.actualColCount = meta.colCount
 
 	if meta.flags&flagHasMorePages == flagHasMorePages {
-		meta.pagingState = copyBytes(f.readBytes())
+		meta.pagingState = internal.CopyBytes(f.readBytes())
 	}
 
 	if meta.flags&flagNoMetaData == flagNoMetaData {
@@ -1940,49 +1935,6 @@ func (f *framer) writeByte(b byte) {
 	f.buf = append(f.buf, b)
 }
 
-func appendBytes(p []byte, d []byte) []byte {
-	if d == nil {
-		return appendInt(p, -1)
-	}
-	p = appendInt(p, int32(len(d)))
-	p = append(p, d...)
-	return p
-}
-
-func appendShort(p []byte, n uint16) []byte {
-	return append(p,
-		byte(n>>8),
-		byte(n),
-	)
-}
-
-func appendInt(p []byte, n int32) []byte {
-	return append(p, byte(n>>24),
-		byte(n>>16),
-		byte(n>>8),
-		byte(n))
-}
-
-func appendUint(p []byte, n uint32) []byte {
-	return append(p, byte(n>>24),
-		byte(n>>16),
-		byte(n>>8),
-		byte(n))
-}
-
-func appendLong(p []byte, n int64) []byte {
-	return append(p,
-		byte(n>>56),
-		byte(n>>48),
-		byte(n>>40),
-		byte(n>>32),
-		byte(n>>24),
-		byte(n>>16),
-		byte(n>>8),
-		byte(n),
-	)
-}
-
 func (f *framer) writeCustomPayload(customPayload *map[string][]byte) {
 	if len(*customPayload) > 0 {
 		if f.proto < protoVersion4 {
@@ -1994,19 +1946,19 @@ func (f *framer) writeCustomPayload(customPayload *map[string][]byte) {
 
 // these are protocol level binary types
 func (f *framer) writeInt(n int32) {
-	f.buf = appendInt(f.buf, n)
+	f.buf = internal.AppendInt(f.buf, n)
 }
 
 func (f *framer) writeUint(n uint32) {
-	f.buf = appendUint(f.buf, n)
+	f.buf = internal.AppendUint(f.buf, n)
 }
 
 func (f *framer) writeShort(n uint16) {
-	f.buf = appendShort(f.buf, n)
+	f.buf = internal.AppendShort(f.buf, n)
 }
 
 func (f *framer) writeLong(n int64) {
-	f.buf = appendLong(f.buf, n)
+	f.buf = internal.AppendLong(f.buf, n)
 }
 
 func (f *framer) writeString(s string) {

helpers.go

@@ -26,6 +26,7 @@ package gocql
 
 import (
 	"fmt"
+	"github.com/gocql/gocql/internal"
 	"math/big"
 	"net"
 	"reflect"
@@ -176,7 +177,7 @@ func getCassandraType(name string, logger StdLogger) TypeInfo {
 			Elem:       getCassandraType(strings.TrimPrefix(name[:len(name)-1], "list<"), logger),
 		}
 	} else if strings.HasPrefix(name, "map<") {
-		names := splitCompositeTypes(strings.TrimPrefix(name[:len(name)-1], "map<"))
+		names := internal.SplitCompositeTypes(strings.TrimPrefix(name[:len(name)-1], "map<"))
 		if len(names) != 2 {
 			logger.Printf("Error parsing map type, it has %d subelements, expecting 2\n", len(names))
 			return NativeType{
@@ -189,7 +190,7 @@ func getCassandraType(name string, logger StdLogger) TypeInfo {
 			Elem:       getCassandraType(names[1], logger),
 		}
 	} else if strings.HasPrefix(name, "tuple<") {
-		names := splitCompositeTypes(strings.TrimPrefix(name[:len(name)-1], "tuple<"))
+		names := internal.SplitCompositeTypes(strings.TrimPrefix(name[:len(name)-1], "tuple<"))
 		types := make([]TypeInfo, len(names))
 
 		for i, name := range names {
@@ -207,34 +208,6 @@ func getCassandraType(name string, logger StdLogger) TypeInfo {
 	}
 }
 
-func splitCompositeTypes(name string) []string {
-	if !strings.Contains(name, "<") {
-		return strings.Split(name, ", ")
-	}
-	var parts []string
-	lessCount := 0
-	segment := ""
-	for _, char := range name {
-		if char == ',' && lessCount == 0 {
-			if segment != "" {
-				parts = append(parts, strings.TrimSpace(segment))
-			}
-			segment = ""
-			continue
-		}
-		segment += string(char)
-		if char == '<' {
-			lessCount++
-		} else if char == '>' {
-			lessCount--
-		}
-	}
-	if segment != "" {
-		parts = append(parts, strings.TrimSpace(segment))
-	}
-	return parts
-}
-
 func apacheToCassandraType(t string) string {
 	t = strings.Replace(t, apacheCassandraTypePrefix, "", -1)
 	t = strings.Replace(t, "(", "<", -1)
@@ -451,12 +424,6 @@ func (iter *Iter) MapScan(m map[string]interface{}) bool {
 	return false
 }
 
-func copyBytes(p []byte) []byte {
-	b := make([]byte, len(p))
-	copy(b, p)
-	return b
-}
-
 var failDNS = false
 
 func LookupIP(host string) ([]net.IP, error) {

internal/frame.go

@@ -0,0 +1,50 @@
+package internal
+
+type UnsetColumn struct{}
+
+func ReadInt(p []byte) int32 {
+	return int32(p[0])<<24 | int32(p[1])<<16 | int32(p[2])<<8 | int32(p[3])
+}
+
+func AppendBytes(p []byte, d []byte) []byte {
+	if d == nil {
+		return AppendInt(p, -1)
+	}
+	p = AppendInt(p, int32(len(d)))
+	p = append(p, d...)
+	return p
+}
+
+func AppendShort(p []byte, n uint16) []byte {
+	return append(p,
+		byte(n>>8),
+		byte(n),
+	)
+}
+
+func AppendInt(p []byte, n int32) []byte {
+	return append(p, byte(n>>24),
+		byte(n>>16),
+		byte(n>>8),
+		byte(n))
+}
+
+func AppendUint(p []byte, n uint32) []byte {
+	return append(p, byte(n>>24),
+		byte(n>>16),
+		byte(n>>8),
+		byte(n))
+}
+
+func AppendLong(p []byte, n int64) []byte {
+	return append(p,
+		byte(n>>56),
+		byte(n>>48),
+		byte(n>>40),
+		byte(n>>32),
+		byte(n>>24),
+		byte(n>>16),
+		byte(n>>8),
+		byte(n),
+	)
+}

internal/helpers.go

@@ -0,0 +1,37 @@
+package internal
+
+import "strings"
+
+func SplitCompositeTypes(name string) []string {
+	if !strings.Contains(name, "<") {
+		return strings.Split(name, ", ")
+	}
+	var parts []string
+	lessCount := 0
+	segment := ""
+	for _, char := range name {
+		if char == ',' && lessCount == 0 {
+			if segment != "" {
+				parts = append(parts, strings.TrimSpace(segment))
+			}
+			segment = ""
+			continue
+		}
+		segment += string(char)
+		if char == '<' {
+			lessCount++
+		} else if char == '>' {
+			lessCount--
+		}
+	}
+	if segment != "" {
+		parts = append(parts, strings.TrimSpace(segment))
+	}
+	return parts
+}
+
+func CopyBytes(p []byte) []byte {
+	b := make([]byte, len(p))
+	copy(b, p)
+	return b
+}