/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cassandra.contrib.stress.operations;
import org.apache.cassandra.contrib.stress.util.OperationThread;
import org.apache.cassandra.db.ColumnFamilyType;
import org.apache.cassandra.thrift.*;
import org.apache.cassandra.utils.ByteBufferUtil;
import java.lang.AssertionError;
import java.nio.ByteBuffer;
import java.nio.charset.CharacterCodingException;
import java.util.List;
public class Reader extends OperationThread
{
public Reader(int index)
{
super(index);
}
public void run()
{
SliceRange sliceRange = new SliceRange();
// start/finish
sliceRange.setStart(new byte[] {}).setFinish(new byte[] {});
// reversed/count
sliceRange.setReversed(false).setCount(session.getColumnsPerKey());
// initialize SlicePredicate with existing SliceRange
SlicePredicate predicate = new SlicePredicate().setSlice_range(sliceRange);
if (session.getColumnFamilyType() == ColumnFamilyType.Super)
{
runSuperColumnReader(predicate);
}
else
{
runColumnReader(predicate);
}
}
private void runSuperColumnReader(SlicePredicate predicate)
{
for (int i = 0; i < session.getKeysPerThread(); i++)
{
ByteBuffer key = ByteBuffer.wrap(generateKey());
for (int j = 0; j < session.getSuperColumns(); j++)
{
String superColumn = 'S' + Integer.toString(j);
ColumnParent parent = new ColumnParent("Super1").setSuper_column(superColumn.getBytes());
long start = System.currentTimeMillis();
try
{
List<ColumnOrSuperColumn> columns;
columns = client.get_slice(key, parent, predicate, session.getConsistencyLevel());
if (columns.size() == 0)
{
System.err.printf("Key %s not found in Super Column %s.%n", ByteBufferUtil.string(key), superColumn);
if (!session.ignoreErrors())
break;
}
}
catch (Exception e)
{
try
{
System.err.printf("Error while reading Super Column %s key %s - %s%n", superColumn, ByteBufferUtil.string(key), getExceptionMessage(e));
}
catch (CharacterCodingException e1)
{
throw new AssertionError(e1); // keys are valid string
}
if (!session.ignoreErrors())
break;
}
session.operationCount.getAndIncrement(index);
session.keyCount.getAndIncrement(index);
session.latencies.getAndAdd(index, System.currentTimeMillis() - start);
}
}
}
private void runColumnReader(SlicePredicate predicate)
{
ColumnParent parent = new ColumnParent("Standard1");
for (int i = 0; i < session.getKeysPerThread(); i++)
{
byte[] key = generateKey();
ByteBuffer keyBuffer = ByteBuffer.wrap(key);
long start = System.currentTimeMillis();
try
{
List<ColumnOrSuperColumn> columns;
columns = client.get_slice(keyBuffer, parent, predicate, session.getConsistencyLevel());
if (columns.size() == 0)
{
System.err.println(String.format("Key %s not found.", new String(key)));
if (!session.ignoreErrors())
break;
}
}
catch (Exception e)
{
System.err.printf("Error while reading key %s - %s%n", new String(key), getExceptionMessage(e));
if (!session.ignoreErrors())
break;
}
session.operationCount.getAndIncrement(index);
session.keyCount.getAndIncrement(index);
session.latencies.getAndAdd(index, System.currentTimeMillis() - start);
}
}
}