/**
* 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.stress.operations;
import com.yammer.metrics.core.TimerContext;
import org.apache.cassandra.stress.Session;
import org.apache.cassandra.stress.util.CassandraClient;
import org.apache.cassandra.stress.util.Operation;
import org.apache.cassandra.db.ColumnFamilyType;
import org.apache.cassandra.thrift.*;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.List;
public class CounterGetter extends Operation
{
public CounterGetter(Session client, int index)
{
super(client, index);
}
public void run(CassandraClient client) throws IOException
{
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)
{
runSuperCounterGetter(predicate, client);
}
else
{
runCounterGetter(predicate, client);
}
}
private void runSuperCounterGetter(SlicePredicate predicate, Cassandra.Client client) throws IOException
{
byte[] rawKey = generateKey();
ByteBuffer key = ByteBuffer.wrap(rawKey);
for (int j = 0; j < session.getSuperColumns(); j++)
{
String superColumn = 'S' + Integer.toString(j);
ColumnParent parent = new ColumnParent("SuperCounter1").setSuper_column(superColumn.getBytes());
TimerContext context = session.latency.time();
boolean success = false;
String exceptionMessage = null;
for (int t = 0; t < session.getRetryTimes(); t++)
{
if (success)
break;
try
{
List<ColumnOrSuperColumn> counters;
counters = client.get_slice(key, parent, predicate, session.getConsistencyLevel());
success = (counters.size() != 0);
}
catch (Exception e)
{
exceptionMessage = getExceptionMessage(e);
success = false;
}
}
if (!success)
{
error(String.format("Operation [%d] retried %d times - error reading counter key %s %s%n",
index,
session.getRetryTimes(),
new String(rawKey),
(exceptionMessage == null) ? "" : "(" + exceptionMessage + ")"));
}
session.operations.getAndIncrement();
session.keys.getAndIncrement();
context.stop();
}
}
private void runCounterGetter(SlicePredicate predicate, Cassandra.Client client) throws IOException
{
ColumnParent parent = new ColumnParent("Counter1");
byte[] key = generateKey();
ByteBuffer keyBuffer = ByteBuffer.wrap(key);
TimerContext context = session.latency.time();
boolean success = false;
String exceptionMessage = null;
for (int t = 0; t < session.getRetryTimes(); t++)
{
if (success)
break;
try
{
List<ColumnOrSuperColumn> counters;
counters = client.get_slice(keyBuffer, parent, predicate, session.getConsistencyLevel());
success = (counters.size() != 0);
}
catch (Exception e)
{
exceptionMessage = getExceptionMessage(e);
success = false;
}
}
if (!success)
{
error(String.format("Operation [%d] retried %d times - error reading counter key %s %s%n",
index,
session.getRetryTimes(),
new String(key),
(exceptionMessage == null) ? "" : "(" + exceptionMessage + ")"));
}
session.operations.getAndIncrement();
session.keys.getAndIncrement();
context.stop();
}
}