com.hazelcast.replicatedmap.impl.operation.IsEmptyOperation Maven / Gradle / Ivy

/*
 * Copyright (c) 2008-2020, 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 com.hazelcast.replicatedmap.impl.operation;

import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.replicatedmap.impl.ReplicatedMapService;
import com.hazelcast.replicatedmap.impl.record.ReplicatedRecordStore;
import com.hazelcast.spi.impl.operationservice.ReadonlyOperation;

import java.io.IOException;
import java.util.Collection;

public class IsEmptyOperation extends AbstractNamedSerializableOperation implements ReadonlyOperation {

    private String name;

    private transient boolean response;

    public IsEmptyOperation() {
    }

    public IsEmptyOperation(String name) {
        this.name = name;
    }

    @Override
    public void run() throws Exception {
        ReplicatedMapService service = getService();
        Collection stores = service.getAllReplicatedRecordStores(name);
        for (ReplicatedRecordStore store : stores) {
            if (!store.isEmpty()) {
                response = false;
                return;
            }
        }
        response = true;
    }

    @Override
    public Object getResponse() {
        return response;
    }

    @Override
    protected void writeInternal(ObjectDataOutput out) throws IOException {
        out.writeUTF(name);
    }

    @Override
    protected void readInternal(ObjectDataInput in) throws IOException {
        name = in.readUTF();
    }

    @Override
    public int getClassId() {
        return ReplicatedMapDataSerializerHook.IS_EMPTY;
    }

    @Override
    public String getName() {
        return name;
    }
}