package com.btoddb.fastpersitentqueue;
/*
* #%L
* fast-persistent-queue
* %%
* Copyright (C) 2014 btoddb.com
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
import com.btoddb.fastpersitentqueue.exceptions.FpqException;
import com.eaio.uuid.UUID;
import org.slf4j.Logger;
import java.io.EOFException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
/**
* Created by burrb009 on 4/6/14.
*/
public class Utils {
public static void writeUuidToFile(RandomAccessFile raFile, UUID uuid) throws IOException {
raFile.writeLong(uuid.getTime());
raFile.writeLong(uuid.getClockSeqAndNode());
}
public static UUID readUuidFromFile(RandomAccessFile raFile) throws IOException {
return new UUID(raFile.readLong(), raFile.readLong());
}
public static void writeInt(RandomAccessFile raFile, int num) throws IOException {
ByteBuffer bb = ByteBuffer.allocate(4);
bb.putInt(num);
raFile.write(bb.array());
}
public static int readInt(RandomAccessFile raFile) throws IOException {
byte[] theBytes = new byte[4];
int count = raFile.read(theBytes);
if (4 == count) {
return ByteBuffer.wrap(theBytes).getInt();
}
else {
throw new EOFException("not enough data to satisfy read of int value");
}
}
public static void writeLong(RandomAccessFile raFile, long num) throws IOException {
ByteBuffer bb = ByteBuffer.allocate(8);
bb.putLong(num);
raFile.write(bb.array());
}
public static long readLong(RandomAccessFile raFile) throws IOException {
byte[] theBytes = new byte[8];
int count = raFile.read(theBytes);
if (8 == count) {
return ByteBuffer.wrap(theBytes).getLong();
}
else {
throw new EOFException("not enough data to satisfy read of long value");
}
}
public static void logAndThrow(Logger logger, String msg) throws FpqException {
logger.error(msg);
throw new FpqException(msg);
}
public static void logAndThrow(Logger logger, String msg, Exception e) throws FpqException {
logger.error(msg, e);
throw new FpqException(msg, e);
}
}