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OrientDBClient.java
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Sat, Aug 3, 16:27

OrientDBClient.java
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/**
* Copyright (c) 2012 - 2015 YCSB contributors. All rights reserved.
*
* 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
*
* 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. See accompanying
* LICENSE file.
*/
/**
* OrientDB client binding for YCSB.
*
* Submitted by Luca Garulli on 5/10/2012.
*
*/
package com.yahoo.ycsb.db;
import com.orientechnologies.orient.core.config.OGlobalConfiguration;
import com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx;
import com.orientechnologies.orient.core.db.record.OIdentifiable;
import com.orientechnologies.orient.core.dictionary.ODictionary;
import com.orientechnologies.orient.core.index.OIndexCursor;
import com.orientechnologies.orient.core.intent.OIntentMassiveInsert;
import com.orientechnologies.orient.core.record.ORecordInternal;
import com.orientechnologies.orient.core.record.impl.ODocument;
import com.yahoo.ycsb.ByteIterator;
import com.yahoo.ycsb.DB;
import com.yahoo.ycsb.DBException;
import com.yahoo.ycsb.Status;
import com.yahoo.ycsb.StringByteIterator;
import java.util.HashMap;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.Set;
import java.util.Vector;
/**
* OrientDB client for YCSB framework.
*
* Properties to set:
*
* orientdb.url=local:C:/temp/databases or remote:localhost:2424 <br>
* orientdb.database=ycsb <br>
* orientdb.user=admin <br>
* orientdb.password=admin <br>
*
* @author Luca Garulli
*
*/
public class OrientDBClient extends DB {
private static final String CLASS = "usertable";
private ODatabaseDocumentTx db;
private ODictionary<ORecordInternal<?>> dictionary;
/**
* Initialize any state for this DB. Called once per DB instance; there is one DB instance per client thread.
*/
public void init() throws DBException {
// initialize OrientDB driver
Properties props = getProperties();
String url;
if (System.getProperty("os.name").toLowerCase().contains("win"))
url = props.getProperty("orientdb.url", "plocal:C:/temp/databases/ycsb");
else
url = props.getProperty("orientdb.url", "plocal:/temp/databases/ycsb");
String user = props.getProperty("orientdb.user", "admin");
String password = props.getProperty("orientdb.password", "admin");
Boolean newdb = Boolean.parseBoolean(props.getProperty("orientdb.newdb", "false"));
try {
System.out.println("OrientDB loading database url = " + url);
OGlobalConfiguration.STORAGE_KEEP_OPEN.setValue(false);
db = new ODatabaseDocumentTx(url);
if (db.exists()) {
db.open(user, password);
if (newdb) {
System.out.println("OrientDB drop and recreate fresh db");
db.drop();
db.create();
}
} else {
System.out.println("OrientDB database not found, create fresh db");
db.create();
}
System.out.println("OrientDB connection created with " + url);
dictionary = db.getMetadata().getIndexManager().getDictionary();
if (!db.getMetadata().getSchema().existsClass(CLASS))
db.getMetadata().getSchema().createClass(CLASS);
db.declareIntent(new OIntentMassiveInsert());
} catch (Exception e1) {
System.err.println("Could not initialize OrientDB connection pool for Loader: " + e1.toString());
e1.printStackTrace();
return;
}
}
@Override
public void cleanup() throws DBException {
if (db != null) {
db.close();
db = null;
}
}
@Override
/**
* Insert a record in the database. Any field/value pairs in the specified values HashMap will be written into the record with the specified
* record key.
*
* @param table The name of the table
* @param key The record key of the record to insert.
* @param values A HashMap of field/value pairs to insert in the record
* @return Zero on success, a non-zero error code on error. See this class's description for a discussion of error codes.
*/
public Status insert(String table, String key, HashMap<String, ByteIterator> values) {
try {
final ODocument document = new ODocument(CLASS);
for (Entry<String, String> entry : StringByteIterator.getStringMap(values).entrySet())
document.field(entry.getKey(), entry.getValue());
document.save();
dictionary.put(key, document);
return Status.OK;
} catch (Exception e) {
e.printStackTrace();
}
return Status.ERROR;
}
@Override
/**
* Delete a record from the database.
*
* @param table The name of the table
* @param key The record key of the record to delete.
* @return Zero on success, a non-zero error code on error. See this class's description for a discussion of error codes.
*/
public Status delete(String table, String key) {
try {
dictionary.remove(key);
return Status.OK;
} catch (Exception e) {
e.printStackTrace();
}
return Status.ERROR;
}
@Override
/**
* Read a record from the database. Each field/value pair from the result will be stored in a HashMap.
*
* @param table The name of the table
* @param key The record key of the record to read.
* @param fields The list of fields to read, or null for all of them
* @param result A HashMap of field/value pairs for the result
* @return Zero on success, a non-zero error code on error or "not found".
*/
public Status read(String table, String key, Set<String> fields, HashMap<String, ByteIterator> result) {
try {
final ODocument document = dictionary.get(key);
if (document != null) {
if (fields != null)
for (String field : fields)
result.put(field, new StringByteIterator((String) document.field(field)));
else
for (String field : document.fieldNames())
result.put(field, new StringByteIterator((String) document.field(field)));
return Status.OK;
}
} catch (Exception e) {
e.printStackTrace();
}
return Status.ERROR;
}
@Override
/**
* Update a record in the database. Any field/value pairs in the specified values HashMap will be written into the record with the specified
* record key, overwriting any existing values with the same field name.
*
* @param table The name of the table
* @param key The record key of the record to write.
* @param values A HashMap of field/value pairs to update in the record
* @return Zero on success, a non-zero error code on error. See this class's description for a discussion of error codes.
*/
public Status update(String table, String key, HashMap<String, ByteIterator> values) {
try {
final ODocument document = dictionary.get(key);
if (document != null) {
for (Entry<String, String> entry : StringByteIterator.getStringMap(values).entrySet())
document.field(entry.getKey(), entry.getValue());
document.save();
return Status.OK;
}
} catch (Exception e) {
e.printStackTrace();
}
return Status.ERROR;
}
@Override
/**
* Perform a range scan for a set of records in the database. Each field/value pair from the result will be stored in a HashMap.
*
* @param table The name of the table
* @param startkey The record key of the first record to read.
* @param recordcount The number of records to read
* @param fields The list of fields to read, or null for all of them
* @param result A Vector of HashMaps, where each HashMap is a set field/value pairs for one record
* @return Zero on success, a non-zero error code on error. See this class's description for a discussion of error codes.
*/
public Status scan(String table, String startkey, int recordcount, Set<String> fields, Vector<HashMap<String, ByteIterator>> result) {
try {
final OIndexCursor entries = dictionary.getIndex().iterateEntriesMajor(startkey, true, true);
while (entries.hasNext()) {
final Entry<Object, OIdentifiable> entry = entries.nextEntry();
final ODocument document = entry.getValue().getRecord();
final HashMap<String, ByteIterator> map = new HashMap<String, ByteIterator>();
result.add(map);
for (String field : fields)
map.put(field, new StringByteIterator((String) document.field(field)));
}
return Status.OK;
} catch (Exception e) {
e.printStackTrace();
}
return Status.ERROR;
}
}

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