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map_entryprocessor_example.go
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map_entryprocessor_example.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 main
import (
"fmt"
"github.com/ahmetmircik/hazelcast-go-client"
"github.com/ahmetmircik/hazelcast-go-client/serialization"
)
const value = "value"
// EntryProcessor should be implemented on the server side.
// EntryProcessor should be registered to serialization.
func main() {
config := hazelcast.NewConfig()
processor := newSimpleEntryProcessor()
config.SerializationConfig().AddDataSerializableFactory(processor.identifiedFactory.factoryID, processor.identifiedFactory)
client, _ := hazelcast.NewClientWithConfig(config)
mp, _ := client.GetMap("testMap")
mp.Put("testKey", "testValue")
value, err := mp.ExecuteOnKey("testKey", processor)
if err != nil {
fmt.Println(err)
}
fmt.Println("after processing the new value is ", value)
newValue, _ := mp.Get("testingKey1")
fmt.Println("after processing the new value is ", newValue)
mp.Clear()
client.Shutdown()
}
type simpleEntryProcessor struct {
classID int32
value string
identifiedFactory *identifiedFactory
}
func newSimpleEntryProcessor() *simpleEntryProcessor {
processor := &simpleEntryProcessor{classID: 1, value: value}
identifiedFactory := &identifiedFactory{factoryID: 66, simpleEntryProcessor: processor}
processor.identifiedFactory = identifiedFactory
return processor
}
type identifiedFactory struct {
simpleEntryProcessor *simpleEntryProcessor
factoryID int32
}
func (idf *identifiedFactory) Create(id int32) serialization.IdentifiedDataSerializable {
if id == idf.simpleEntryProcessor.classID {
return &simpleEntryProcessor{classID: 1}
}
return nil
}
func (p *simpleEntryProcessor) ReadData(input serialization.DataInput) error {
p.value = input.ReadUTF()
return input.Error()
}
func (p *simpleEntryProcessor) WriteData(output serialization.DataOutput) error {
output.WriteUTF(p.value)
return nil
}
func (p *simpleEntryProcessor) FactoryID() int32 {
return p.identifiedFactory.factoryID
}
func (p *simpleEntryProcessor) ClassID() int32 {
return p.classID
}