/**
* 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 org.apache.cassandra.utils.ByteBufferUtil;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
public class MultiGetter extends Operation
{
public MultiGetter(Session client, int index)
{
super(client, index);
}
public void run(CassandraClient client) throws IOException
{
SlicePredicate predicate = new SlicePredicate().setSlice_range(new SliceRange(ByteBufferUtil.EMPTY_BYTE_BUFFER,
ByteBufferUtil.EMPTY_BYTE_BUFFER,
false, session.getColumnsPerKey()));
int offset = index * session.getKeysPerThread();
Map<ByteBuffer,List<ColumnOrSuperColumn>> results;
if (session.getColumnFamilyType() == ColumnFamilyType.Super)
{
List<ByteBuffer> keys = generateKeys(offset, offset + session.getKeysPerCall());
for (int j = 0; j < session.getSuperColumns(); j++)
{
ColumnParent parent = new ColumnParent("Super1").setSuper_column(ByteBufferUtil.bytes("S" + j));
TimerContext context = session.latency.time();
boolean success = false;
String exceptionMessage = null;
for (int t = 0; t < session.getRetryTimes(); t++)
{
if (success)
break;
try
{
results = client.multiget_slice(keys, parent, predicate, session.getConsistencyLevel());
success = (results.size() != 0);
}
catch (Exception e)
{
exceptionMessage = getExceptionMessage(e);
}
}
if (!success)
{
error(String.format("Operation [%d] retried %d times - error on calling multiget_slice for keys %s %s%n",
index,
session.getRetryTimes(),
keys,
(exceptionMessage == null) ? "" : "(" + exceptionMessage + ")"));
}
session.operations.getAndIncrement();
session.keys.getAndAdd(keys.size());
context.stop();
offset += session.getKeysPerCall();
}
}
else
{
ColumnParent parent = new ColumnParent("Standard1");
List<ByteBuffer> keys = generateKeys(offset, offset + session.getKeysPerCall());
TimerContext context = session.latency.time();
boolean success = false;
String exceptionMessage = null;
for (int t = 0; t < session.getRetryTimes(); t++)
{
if (success)
break;
try
{
results = client.multiget_slice(keys, parent, predicate, session.getConsistencyLevel());
success = (results.size() != 0);
}
catch (Exception e)
{
exceptionMessage = getExceptionMessage(e);
success = false;
}
}
if (!success)
{
error(String.format("Operation [%d] retried %d times - error on calling multiget_slice for keys %s %s%n",
index,
session.getRetryTimes(),
keys,
(exceptionMessage == null) ? "" : "(" + exceptionMessage + ")"));
}
session.operations.getAndIncrement();
session.keys.getAndAdd(keys.size());
context.stop();
offset += session.getKeysPerCall();
}
}
private List<ByteBuffer> generateKeys(int start, int limit)
{
List<ByteBuffer> keys = new ArrayList<ByteBuffer>();
for (int i = start; i < limit; i++)
{
keys.add(ByteBuffer.wrap(generateKey()));
}
return keys;
}
}