map_values_with_predicate_codec.go

/*
 * Copyright (c) 2008-2021, 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 codec

import (
	"github.com/hazelcast/hazelcast-go-client/internal/proto"
	iserialization "github.com/hazelcast/hazelcast-go-client/internal/serialization"
)

const (
	// hex: 0x012700
	MapValuesWithPredicateCodecRequestMessageType = int32(75520)
	// hex: 0x012701
	MapValuesWithPredicateCodecResponseMessageType = int32(75521)

	MapValuesWithPredicateCodecRequestInitialFrameSize = proto.PartitionIDOffset + proto.IntSizeInBytes
)

// Queries the map based on the specified predicate and returns the values of matching entries.Specified predicate
// runs on all members in parallel. The collection is NOT backed by the map, so changes to the map are NOT reflected
// in the collection, and vice-versa. This method is always executed by a distributed query, so it may throw a
// QueryResultSizeExceededException if query result size limit is configured.

func EncodeMapValuesWithPredicateRequest(name string, predicate *iserialization.Data) *proto.ClientMessage {
	clientMessage := proto.NewClientMessageForEncode()
	clientMessage.SetRetryable(true)

	initialFrame := proto.NewFrameWith(make([]byte, MapValuesWithPredicateCodecRequestInitialFrameSize), proto.UnfragmentedMessage)
	clientMessage.AddFrame(initialFrame)
	clientMessage.SetMessageType(MapValuesWithPredicateCodecRequestMessageType)
	clientMessage.SetPartitionId(-1)

	EncodeString(clientMessage, name)
	EncodeData(clientMessage, predicate)

	return clientMessage
}

func DecodeMapValuesWithPredicateResponse(clientMessage *proto.ClientMessage) []*iserialization.Data {
	frameIterator := clientMessage.FrameIterator()
	// empty initial frame
	frameIterator.Next()

	return DecodeListMultiFrameForData(frameIterator)
}