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NCache Professional client for java.
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package com.alachisoft.ncache.client.internal.communication;

import Alachisoft.NCache.Common.Net.Address;
import com.alachisoft.ncache.common.protobuf.FragmentedResponseProtocol;
import com.alachisoft.ncache.common.protobuf.ResponseProtocol;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

//  Copyright (c) 2020 Alachisoft
//  
//  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


class ResponseIntegrator implements java.util.Comparator {
    private java.util.HashMap>> _serverMap = new java.util.HashMap<>();

    public final ResponseProtocol.Response AddResponseFragment(Address server, FragmentedResponseProtocol.FragmentedResponse responseFragment) {
        java.util.ArrayList responseList = null;
        java.util.HashMap> resposeTable = null;
        synchronized (this) {
            if (!_serverMap.containsKey(server)) {
                _serverMap.put(server, new java.util.HashMap<>());
            }

            resposeTable = _serverMap.get(server);

            if (!resposeTable.containsKey(responseFragment.getMessageId())) {
                resposeTable.put(responseFragment.getMessageId(), new java.util.ArrayList<>());
            }
        }

        responseList = resposeTable.get(responseFragment.getMessageId());
        responseList.add(responseFragment);

        if (responseList.size() == responseFragment.getTotalFragments()) {
            synchronized (this) {
                resposeTable.remove(responseFragment.getMessageId());
            }

            responseList.sort(this);
            ResponseProtocol.Response finalResponse = null;

            ByteArrayOutputStream stream = new ByteArrayOutputStream();

            try {
                for (FragmentedResponseProtocol.FragmentedResponse fragment : responseList) {
                    stream.write(fragment.getMessage().toByteArray(), 0, fragment.getMessage().toByteArray().length);
                }

                InputStream inputStream = new ByteArrayInputStream(stream.toByteArray());
                try {
                    finalResponse = ResponseProtocol.Response.parseFrom(inputStream);
                } catch (IOException e) {
                }
            } finally {
                try {
                    stream.close();
                } catch (IOException e) {
                }
            }
            return finalResponse;

        }

        return null;
    }

    public final void RemoveServer(Address server) {
        synchronized (this) {
            if (_serverMap.containsKey(server)) {
                _serverMap.remove(server);
            }
        }
    }

    @Override
    public int compare(FragmentedResponseProtocol.FragmentedResponse o1, FragmentedResponseProtocol.FragmentedResponse o2) {
        if (o1.getFragmentNo() < o2.getFragmentNo()) {
            return -1;
        }

        if (o1.getFragmentNo() > o2.getFragmentNo()) {
            return 1;
        }

        return 0;
    }
}