/* This file is part of VoltDB.
* Copyright (C) 2008-2017 VoltDB Inc.
*
* This program 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.
*
* This program 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 VoltDB. If not, see <http://www.gnu.org/licenses/>.
*/
package org.voltdb.client;
/* This file is part of VoltDB.
* Copyright (C) 2008-2017 VoltDB Inc.
*
* This program 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.
*
* This program 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 VoltDB. If not, see <http://www.gnu.org/licenses/>.
*/
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
/**
* Helper methods duplicated from MiscUtils to avoid linking with
* some of the stuff MiscUtils brings in.
*
*/
public class ClientUtils {
/**
* I heart commutativity
* @param buffer ByteBuffer assumed position is at end of data
* @return the cheesy checksum of this VoltTable
*/
public static final long cheesyBufferCheckSum(ByteBuffer buffer) {
final int mypos = buffer.position();
buffer.position(0);
long checksum = 0;
if (buffer.hasArray()) {
final byte bytes[] = buffer.array();
final int end = buffer.arrayOffset() + mypos;
for (int ii = buffer.arrayOffset(); ii < end; ii++) {
checksum += bytes[ii];
}
} else {
for (int ii = 0; ii < mypos; ii++) {
checksum += buffer.get();
}
}
buffer.position(mypos);
return checksum;
}
/**
* Serialize a file into bytes. Used to serialize catalog and deployment
* file for UpdateApplicationCatalog on the client.
*
* @param path
* @return a byte array of the file
* @throws IOException
* If there are errors reading the file
*/
public static byte[] fileToBytes(File path) throws IOException {
FileInputStream fin = new FileInputStream(path);
byte[] buffer = new byte[(int) fin.getChannel().size()];
try {
if (fin.read(buffer) == -1) {
throw new IOException("File " + path.getAbsolutePath() + " is empty");
}
} finally {
fin.close();
}
return buffer;
}
}