/**
* Copyright (c) 2012, University of Konstanz, Distributed Systems Group All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or other materials provided with the
* distribution. * Neither the name of the University of Konstanz nor the names of its contributors may be used to
* endorse or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
*
*/
package org.jscsi.initiator.example;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Random;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import org.jscsi.exception.ConfigurationException;
import org.jscsi.exception.NoSuchSessionException;
import org.jscsi.exception.TaskExecutionException;
import org.jscsi.initiator.Configuration;
import org.jscsi.initiator.Initiator;
/**
* Example 3, Reading and Writing data multi-threaded to multiple targets.
*
* @author Sebastian Graf, University of Konstanz
*
*/
public class MultiThreadedReadWrite {
public static void main (final String[] args) throws NoSuchSessionException , TaskExecutionException , ConfigurationException , InterruptedException , ExecutionException {
// init of test structures
int numBlocks = 50;
int address = 12345;
final ByteBuffer writeData1 = ByteBuffer.allocate(512 * numBlocks);
final ByteBuffer readData1 = ByteBuffer.allocate(512 * numBlocks);
final ByteBuffer writeData2 = ByteBuffer.allocate(512 * numBlocks);
final ByteBuffer readData2 = ByteBuffer.allocate(512 * numBlocks);
Random random = new Random(System.currentTimeMillis());
random.nextBytes(writeData1.array());
random.nextBytes(writeData2.array());
// init of initiator and the session
String target1 = "testing-xen2-disk1";
String target2 = "testing-xen2-disk2";
Initiator initiator = new Initiator(Configuration.create());
initiator.createSession(target1);
initiator.createSession(target2);
// writing the first target multithreaded
final Future<Void> write1 = initiator.multiThreadedWrite(target1, writeData1, address, writeData1.capacity());
// writing the second target multithreaded
final Future<Void> write2 = initiator.multiThreadedWrite(target2, writeData2, address, writeData2.capacity());
// Blocking until writes are concluded
write1.get();
write2.get();
// Getting the data from the first target multithreaded
final Future<Void> read1 = initiator.multiThreadedRead(target1, readData1, address, readData1.capacity());
// Getting the data from the second target multithreaded
final Future<Void> read2 = initiator.multiThreadedRead(target2, readData2, address, readData2.capacity());
// Blocking until reads are concluded
read1.get();
read2.get();
// closing the targets
initiator.closeSession(target1);
initiator.closeSession(target2);
// correctness check
if (!Arrays.equals(writeData1.array(), readData1.array()) || !Arrays.equals(writeData2.array(), readData2.array())) { throw new IllegalStateException("Data read must be equal to the data written"); }
}
}