Homec4science
Diffusion YCSB (async) Browse

R7507/tarantool/src/main/java/com/yahoo/ycsb/db/TarantoolClient.java
cf5d2ca5f554async

Last Change
Raw File

TarantoolClient.java
View Options

/**
* Copyright (c) 2014 - 2016 YCSB Contributors. All rights reserved.
* <p>
* Licensed 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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. See accompanying
* LICENSE file.
*/
package com.yahoo.ycsb.db;
import com.yahoo.ycsb.*;
import org.tarantool.TarantoolConnection16;
import org.tarantool.TarantoolConnection16Impl;
import org.tarantool.TarantoolException;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* YCSB binding for <a href="http://tarantool.org/">Tarantool</a>.
*/
public class TarantoolClient extends DB {
private static final Logger LOGGER = Logger.getLogger(TarantoolClient.class.getName());
private static final String HOST_PROPERTY = "tarantool.host";
private static final String PORT_PROPERTY = "tarantool.port";
private static final String SPACE_PROPERTY = "tarantool.space";
private static final String DEFAULT_HOST = "localhost";
private static final String DEFAULT_PORT = "3301";
private static final String DEFAULT_SPACE = "1024";
private TarantoolConnection16 connection;
private int spaceNo;
public void init() throws DBException {
Properties props = getProperties();
int port = Integer.parseInt(props.getProperty(PORT_PROPERTY, DEFAULT_PORT));
String host = props.getProperty(HOST_PROPERTY, DEFAULT_HOST);
spaceNo = Integer.parseInt(props.getProperty(SPACE_PROPERTY, DEFAULT_SPACE));
try {
this.connection = new TarantoolConnection16Impl(host, port);
} catch (Exception exc) {
throw new DBException("Can't initialize Tarantool connection", exc);
}
}
public void cleanup() throws DBException {
this.connection.close();
}
@Override
public Status insert(String table, String key, Map<String, ByteIterator> values) {
return replace(key, values, "Can't insert element");
}
private HashMap<String, ByteIterator> tupleConvertFilter(List<String> input, Set<String> fields) {
HashMap<String, ByteIterator> result = new HashMap<>();
if (input == null) {
return result;
}
for (int i = 1; i < input.toArray().length; i += 2) {
if (fields == null || fields.contains(input.get(i))) {
result.put(input.get(i), new StringByteIterator(input.get(i + 1)));
}
}
return result;
}
@Override
public Status read(String table, String key, Set<String> fields, Map<String, ByteIterator> result) {
try {
List<String> response = this.connection.select(this.spaceNo, 0, Arrays.asList(key), 0, 1, 0);
result = tupleConvertFilter(response, fields);
return Status.OK;
} catch (TarantoolException exc) {
LOGGER.log(Level.SEVERE, "Can't select element", exc);
return Status.ERROR;
} catch (NullPointerException exc) {
return Status.ERROR;
}
}
@Override
public Status scan(String table, String startkey,
int recordcount, Set<String> fields,
Vector<HashMap<String, ByteIterator>> result) {
List<List<String>> response;
try {
response = this.connection.select(this.spaceNo, 0, Arrays.asList(startkey), 0, recordcount, 6);
} catch (TarantoolException exc) {
LOGGER.log(Level.SEVERE, "Can't select range elements", exc);
return Status.ERROR;
} catch (NullPointerException exc) {
return Status.ERROR;
}
for (List<String> i : response) {
HashMap<String, ByteIterator> temp = tupleConvertFilter(i, fields);
if (!temp.isEmpty()) {
result.add((HashMap<String, ByteIterator>) temp.clone());
}
}
return Status.OK;
}
@Override
public Status delete(String table, String key) {
try {
this.connection.delete(this.spaceNo, Collections.singletonList(key));
} catch (TarantoolException exc) {
LOGGER.log(Level.SEVERE, "Can't delete element", exc);
return Status.ERROR;
} catch (NullPointerException e) {
return Status.ERROR;
}
return Status.OK;
}
@Override
public Status update(String table, String key, Map<String, ByteIterator> values) {
return replace(key, values, "Can't replace element");
}
private Status replace(String key, Map<String, ByteIterator> values, String exceptionDescription) {
int j = 0;
String[] tuple = new String[1 + 2 * values.size()];
tuple[0] = key;
for (Map.Entry<String, ByteIterator> i : values.entrySet()) {
tuple[j + 1] = i.getKey();
tuple[j + 2] = i.getValue().toString();
j += 2;
}
try {
this.connection.replace(this.spaceNo, tuple);
} catch (TarantoolException exc) {
LOGGER.log(Level.SEVERE, exceptionDescription, exc);
return Status.ERROR;
}
return Status.OK;
}
}
c4science · Help