com.kromatik.dasshy.server.thrift.TUtils.java Source code

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Here is the source code for com.kromatik.dasshy.server.thrift.TUtils.java

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/**
 * Dasshy - Real time and Batch Analytics Open Source System
 * Copyright (C) 2016 Kromatik Solutions (http://kromatiksolutions.com)
 *
 * This file is part of Dasshy
 *
 * Dasshy is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * Dasshy is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with Dasshy.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.kromatik.dasshy.server.thrift;

import org.apache.thrift.TBase;
import org.apache.thrift.TException;
import org.apache.thrift.protocol.TCompactProtocol;
import org.apache.thrift.protocol.TJSONProtocol;
import org.apache.thrift.transport.TMemoryBuffer;

import java.io.UnsupportedEncodingException;

/**
 * Utility class for Thrift (de) serialization
 */
public class TUtils {

    /**
     * Private constructor for Utility classes
     */
    private TUtils() {
        // no-arg
    }

    /**
     * Serialize the thrift entity using Json protocol
     *
     * @param tEntity thrift entity
     * @return byte[]
     * @throws TException
     */
    public static byte[] serializeJson(final TBase tEntity) throws TException {
        final TMemoryBuffer memoryBuffer = new TMemoryBuffer(1);
        tEntity.write(new TJSONProtocol(memoryBuffer));
        memoryBuffer.flush();
        try {
            return memoryBuffer.toString("UTF-8").getBytes("UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new TException(e);
        } finally {
            memoryBuffer.close();
        }
    }

    /**
     * Deserialize into thrift entity using JSON protocol
     *
     * @param bytesEntity byte[] to deserialize
     * @param tBase       thrift entity
     * @throws TException
     */
    public static void deserializeJson(byte[] bytesEntity, final TBase tBase) throws TException {
        final TMemoryBuffer memoryBuffer = new TMemoryBuffer(bytesEntity.length);
        memoryBuffer.write(bytesEntity);
        tBase.read(new TJSONProtocol(memoryBuffer));
        memoryBuffer.close();
    }

    /**
     * Serialize the thrift entity using Compact protocol
     *
     * @param tEntity thrift entity
     * @return byte[]
     * @throws TException
     */
    public static byte[] serializeCompact(final TBase tEntity) throws TException {
        final TMemoryBuffer memoryBuffer = new TMemoryBuffer(1);
        tEntity.write(new TCompactProtocol(memoryBuffer));
        memoryBuffer.flush();
        try {
            return memoryBuffer.getArray();
        } finally {
            memoryBuffer.close();
        }
    }

    /**
     * Deserialize into thrift entity using Compact protocol
     *
     * @param bytesEntity byte[] to deserialize
     * @param tBase       thrift entity
     * @throws TException
     */
    public static void deserializeCompact(byte[] bytesEntity, final TBase tBase) throws TException {
        final TMemoryBuffer memoryBuffer = new TMemoryBuffer(bytesEntity.length);
        memoryBuffer.write(bytesEntity);
        tBase.read(new TCompactProtocol(memoryBuffer));
        memoryBuffer.close();
    }
}