/**
* 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.
*/
//Cleversafe open-source code header - Version 1.1 - December 1, 2006
//
//Cleversafe Dispersed Storage(TM) is software for secure, private and
//reliable storage of the world's data using information dispersal.
//
//Copyright (C) 2005-2007 Cleversafe, Inc.
//
//This program is free software; you can redistribute it and/or
//modify it under the terms of the GNU General Public License
//as published by the Free Software Foundation; either version 2
//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 General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
//USA.
//
//Contact Information:
// Cleversafe, 10 W. 35th Street, 16th Floor #84,
// Chicago IL 60616
// email: licensing@cleversafe.org
//
//END-OF-HEADER
//-----------------------
//@author: John Quigley <jquigley@cleversafe.com>
//@date: January 1, 2008
//---------------------
package org.jscsi.scsi.tasks.buffered;
import java.nio.ByteBuffer;
import java.util.HashMap;
import java.util.Map;
import org.jscsi.scsi.protocol.Command;
import org.jscsi.scsi.protocol.cdb.CDB;
import org.jscsi.scsi.protocol.cdb.Inquiry;
import org.jscsi.scsi.protocol.cdb.ModeSense10;
import org.jscsi.scsi.protocol.cdb.ModeSense6;
import org.jscsi.scsi.protocol.cdb.Read10;
import org.jscsi.scsi.protocol.cdb.Read12;
import org.jscsi.scsi.protocol.cdb.Read16;
import org.jscsi.scsi.protocol.cdb.Read6;
import org.jscsi.scsi.protocol.cdb.ReadCapacity10;
import org.jscsi.scsi.protocol.cdb.ReadCapacity16;
import org.jscsi.scsi.protocol.cdb.TestUnitReady;
import org.jscsi.scsi.protocol.cdb.Write10;
import org.jscsi.scsi.protocol.cdb.Write12;
import org.jscsi.scsi.protocol.cdb.Write16;
import org.jscsi.scsi.protocol.cdb.Write6;
import org.jscsi.scsi.protocol.inquiry.InquiryDataRegistry;
import org.jscsi.scsi.protocol.mode.ModePageRegistry;
import org.jscsi.scsi.protocol.sense.exceptions.IllegalRequestException;
import org.jscsi.scsi.protocol.sense.exceptions.InvalidCommandOperationCodeException;
import org.jscsi.scsi.tasks.Task;
import org.jscsi.scsi.tasks.TaskFactory;
import org.jscsi.scsi.tasks.lu.InquiryTask;
import org.jscsi.scsi.tasks.lu.ModeSenseTask;
import org.jscsi.scsi.tasks.lu.TestUnitReadyTask;
import org.jscsi.scsi.transport.TargetTransportPort;
public class BufferedTaskFactory implements TaskFactory
{
private static Map<Class<? extends CDB>, Class<? extends BufferedTask>> tasks =
new HashMap<Class<? extends CDB>, Class<? extends BufferedTask>>();
private ByteBuffer buffer;
private int blockLength;
private ModePageRegistry modePageRegistry;
private InquiryDataRegistry inquiryDataRegistry;
static
{
BufferedTaskFactory.tasks.put(Read6.class, BufferedReadTask.class);
BufferedTaskFactory.tasks.put(Read10.class, BufferedReadTask.class);
BufferedTaskFactory.tasks.put(Read12.class, BufferedReadTask.class);
BufferedTaskFactory.tasks.put(Read16.class, BufferedReadTask.class);
BufferedTaskFactory.tasks.put(Write6.class, BufferedWriteTask.class);
BufferedTaskFactory.tasks.put(Write10.class, BufferedWriteTask.class);
BufferedTaskFactory.tasks.put(Write12.class, BufferedWriteTask.class);
BufferedTaskFactory.tasks.put(Write16.class, BufferedWriteTask.class);
BufferedTaskFactory.tasks.put(ReadCapacity10.class, BufferedReadCapacityTask.class);
BufferedTaskFactory.tasks.put(ReadCapacity16.class, BufferedReadCapacityTask.class);
}
public BufferedTaskFactory(
ByteBuffer buffer,
int blockLength,
ModePageRegistry modePageRegistry,
InquiryDataRegistry inquiryDataRegistry)
{
this.buffer = buffer;
this.blockLength = blockLength;
this.modePageRegistry = modePageRegistry;
this.inquiryDataRegistry = inquiryDataRegistry;
}
public Task getInstance(TargetTransportPort port, Command command)
throws IllegalRequestException
{
// check for basic commands
switch (command.getCommandDescriptorBlock().getOperationCode())
{
case ModeSense6.OPERATION_CODE :
case ModeSense10.OPERATION_CODE :
return new ModeSenseTask(port, command, modePageRegistry, inquiryDataRegistry);
case TestUnitReady.OPERATION_CODE :
return new TestUnitReadyTask(port, command, modePageRegistry, inquiryDataRegistry);
case Inquiry.OPERATION_CODE :
return new InquiryTask(port, command, modePageRegistry, inquiryDataRegistry);
}
Class<? extends BufferedTask> taskClass =
tasks.get(command.getCommandDescriptorBlock().getClass());
if (taskClass != null)
{
try
{
return taskClass.newInstance().load(buffer, blockLength, port, command,
modePageRegistry, inquiryDataRegistry);
}
catch (InstantiationException e)
{
throw new RuntimeException("Unable to instantiate class with default constructor"
+ taskClass.getName(), e);
}
catch (IllegalAccessException e)
{
throw new RuntimeException("Unable to instantiate class with default constructor"
+ taskClass.getName(), e);
}
}
else
{
throw new InvalidCommandOperationCodeException();
}
}
public String toString()
{
return "<BufferedTask block-size: " + this.blockLength + ", backing-store: ByteBuffer>";
}
public boolean respondsTo(Class<? extends CDB> cls)
{
return tasks.containsKey(cls);
}
}