package org.apache.cassandra.stress.operations;
/*
*
* 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.
*
*/
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Collections;
import java.util.List;
import org.apache.cassandra.db.ColumnFamilyType;
import org.apache.cassandra.stress.Session;
import org.apache.cassandra.stress.util.CassandraClient;
import org.apache.cassandra.stress.util.Operation;
import org.apache.cassandra.thrift.Compression;
import org.apache.cassandra.thrift.CqlResult;
import org.apache.cassandra.thrift.CqlRow;
import org.apache.cassandra.utils.ByteBufferUtil;
public class CqlIndexedRangeSlicer extends Operation
{
private static List<ByteBuffer> values = null;
private static String cqlQuery = null;
public CqlIndexedRangeSlicer(Session client, int idx)
{
super(client, idx);
}
public void run(CassandraClient client) throws IOException
{
if (session.getColumnFamilyType() == ColumnFamilyType.Super)
throw new RuntimeException("Super columns are not implemented for CQL");
if (values == null)
values = generateValues();
if (cqlQuery == null)
{
StringBuilder query = new StringBuilder("SELECT FIRST ").append(session.getColumnsPerKey())
.append(" ''..'' FROM Standard1 USING CONSISTENCY ").append(session.getConsistencyLevel())
.append(" WHERE C1=").append(getUnQuotedCqlBlob(values.get(1).array()))
.append(" AND KEY > ? LIMIT ").append(session.getKeysPerCall());
cqlQuery = query.toString();
}
String format = "%0" + session.getTotalKeysLength() + "d";
String startOffset = String.format(format, 0);
int expectedPerValue = session.getNumKeys() / values.size(), received = 0;
while (received < expectedPerValue)
{
long start = System.currentTimeMillis();
boolean success = false;
String exceptionMessage = null;
CqlResult results = null;
String formattedQuery = null;
List<String> queryParms = Collections.singletonList(getUnQuotedCqlBlob(startOffset));
for (int t = 0; t < session.getRetryTimes(); t++)
{
if (success)
break;
try
{
if (session.usePreparedStatements())
{
Integer stmntId = getPreparedStatement(client, cqlQuery);
results = client.execute_prepared_cql_query(stmntId, queryParamsAsByteBuffer(queryParms));
}
else
{
if (formattedQuery == null)
formattedQuery = formatCqlQuery(cqlQuery, queryParms);
results = client.execute_cql_query(ByteBuffer.wrap(formattedQuery.getBytes()), Compression.NONE);
}
success = (results.rows.size() != 0);
}
catch (Exception e)
{
exceptionMessage = getExceptionMessage(e);
success = false;
}
}
if (!success)
{
error(String.format("Operation [%d] retried %d times - error executing indexed range query with offset %s %s%n",
index,
session.getRetryTimes(),
startOffset,
(exceptionMessage == null) ? "" : "(" + exceptionMessage + ")"));
}
received += results.rows.size();
// convert max key found back to an integer, and increment it
startOffset = String.format(format, (1 + getMaxKey(results.rows)));
session.operations.getAndIncrement();
session.keys.getAndAdd(results.rows.size());
session.latency.getAndAdd(System.currentTimeMillis() - start);
}
}
/**
* Get maximum key from CqlRow list
* @param rows list of the CqlRow objects
* @return maximum key value of the list
*/
private int getMaxKey(List<CqlRow> rows)
{
int maxKey = ByteBufferUtil.toInt(rows.get(0).key);
for (CqlRow row : rows)
{
int currentKey = ByteBufferUtil.toInt(row.key);
if (currentKey > maxKey)
maxKey = currentKey;
}
return maxKey;
}
}