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data.go
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data.go
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// Copyright (c) 2008-2018, Hazelcast, Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License")
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package internal
import (
"encoding/binary"
"math"
"github.com/ahmetmircik/hazelcast-go-client/internal/util/murmur"
"github.com/ahmetmircik/hazelcast-go-client/serialization"
)
const (
typeOffset = 4
DataOffset = 8
heapDataOverhead = 8
)
type Data struct {
Payload []byte
}
// NewData return serialization Data with the given payload.
func NewData(payload []byte) serialization.Data {
return &Data{payload}
}
func (d *Data) Buffer() []byte {
return d.Payload
}
func (d *Data) GetType() int32 {
if d.TotalSize() == 0 {
return 0
}
return int32(binary.BigEndian.Uint32(d.Payload[typeOffset:]))
}
func (d *Data) TotalSize() int {
if d.Payload == nil {
return 0
}
return len(d.Payload)
}
func (d *Data) DataSize() int {
return int(math.Max(float64(d.TotalSize()-heapDataOverhead), 0))
}
func (d *Data) GetPartitionHash() int32 {
return murmur.Default3A(d.Payload, DataOffset, d.DataSize())
}