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MongoDBSchemaManager.java
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MongoDBSchemaManager.java
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/*******************************************************************************
* * Copyright 2012 Impetus Infotech.
* *
* * 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.
******************************************************************************/
package com.impetus.client.mongodb.schemamanager;
import java.net.UnknownHostException;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.impetus.kundera.PersistenceProperties;
import com.impetus.kundera.client.ClientType;
import com.impetus.kundera.configure.schema.SchemaGenerationException;
import com.impetus.kundera.configure.schema.TableInfo;
import com.impetus.kundera.configure.schema.api.AbstractSchemaManager;
import com.impetus.kundera.configure.schema.api.SchemaManager;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.Mongo;
import com.mongodb.MongoException;
/**
* The Class MongoDBSchemaManager manages auto schema operation
* {@code ScheamOperationType} for mongoDb database.
*
* @author Kuldeep.kumar
*
*/
public class MongoDBSchemaManager extends AbstractSchemaManager implements SchemaManager
{
/** The m. */
private Mongo m;
/** The db. */
private DB db;
/** The coll. */
private DBCollection coll;
/** The Constant logger. */
private static final Logger logger = LoggerFactory.getLogger(MongoDBSchemaManager.class);
public MongoDBSchemaManager(ClientType client)
{
super(client);
}
@Override
/**
* Export schema handles the handleOperation method.
*/
public void exportSchema()
{
super.exportSchema();
}
/**
* update method update schema and table for the list of tableInfos
*
* @param tableInfos
* list of TableInfos.
*/
protected void update(List<TableInfo> tableInfos)
{
// Do nothing as by default mongo handles it.
}
/**
* create method creates schema and table for the list of tableInfos.
*
* @param tableInfos
* list of TableInfos.
*/
protected void create(List<TableInfo> tableInfos)
{
// Do nothing as by default mongo handles it.
}
/**
* create_drop method creates schema and table for the list of tableInfos.
*
* @param tableInfos
* list of TableInfos.
*/
protected void create_drop(List<TableInfo> tableInfos)
{
create(tableInfos);
}
/**
* validate method validate schema and table for the list of tableInfos.
*
* @param tableInfos
* list of TableInfos.
*/
protected void validate(List<TableInfo> tableInfos)
{
// List<String> dbNames = m.getDatabaseNames();
// boolean found = false;
// for (String dbName : dbNames)
// {
// if (dbName.equalsIgnoreCase(databaseName))
// {
// found = true;
// }
// }
// if (!found)
// {
// logger.error("database " + databaseName + "does not exist");
// throw new SchemaGenerationException("mongoDb", databaseName);
// }
// else
// {
db = m.getDB(databaseName);
// }
if (db == null)
{
logger.error("database " + databaseName + "does not exist");
throw new SchemaGenerationException("mongoDb", databaseName);
}
else
{
for (TableInfo tableInfo : tableInfos)
{
if (!db.collectionExists(tableInfo.getTableName()))
{
logger.error("Collection " + tableInfo.getTableName() + "does not exist in db " + db.getName());
throw new SchemaGenerationException("mongoDb", databaseName, tableInfo.getTableName());
}
}
}
}
/**
* drop schema method drop the table
*/
public void dropSchema()
{
if (operation != null && operation.equalsIgnoreCase("create-drop"))
{
for (TableInfo tableInfo : tableInfos)
{
coll = db.getCollection(tableInfo.getTableName());
coll.drop();
}
}
db = null;
}
/**
* initiate client method initiates the client.
*
* @return boolean value ie client started or not.
*
*/
protected boolean initiateClient()
{
if (kundera_client.equalsIgnoreCase("MongoDB"))
{
int localport = Integer.parseInt(port);
try
{
m = new Mongo(host, localport);
db = m.getDB(puMetadata.getProperties().getProperty(PersistenceProperties.KUNDERA_KEYSPACE));
}
catch (UnknownHostException e)
{
logger.error("database host cannot be resolved caused by" + e.getMessage());
throw new SchemaGenerationException(e, "mongoDb");
}
catch (MongoException e)
{
throw new SchemaGenerationException(e);
}
return true;
}
return false;
}
}