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/*
* 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.tuscany.nosqldatastore.hbase;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.tuscany.nosqldatastore.Database;
import org.apache.tuscany.nosqldatastore.Group;
import java.io.IOException;
public class HBaseDatatabase implements Database{
private HTable table;
private HBaseAdmin admin;
HBaseDatatabase(String dbname, HBaseAdmin admin){
Configuration conf = HBaseConfiguration.create();
try {
try{
HTableDescriptor descriptor = new HTableDescriptor(dbname);
admin.createTable(descriptor);
} catch (MasterNotRunningException e) {
e.printStackTrace();
} catch (ZooKeeperConnectionException e) {
e.printStackTrace();
} catch (TableExistsException e){
System.out.println("connected to existing database....");
} finally {
table = new HTable(conf,dbname);
System.out.println(new String(table.getTableName()));
this.admin = admin;
table.flushCommits();
}
}catch (IOException ex) {
ex.printStackTrace();
}
}
public Group createGroup(String groupId) {
HColumnDescriptor cf= new HColumnDescriptor(groupId.getBytes());
try {
admin.disableTable(table.getTableName());
admin.addColumn(table.getTableName(),cf);
admin.enableTable(table.getTableName());
} catch (IOException e) {
System.out.println("Error: Creating the group "+groupId);
e.printStackTrace();
}
Group group = new HBaseGroup(table, groupId);
return group;
}
public Group getGroup(String groupId) {
Group group = new HBaseGroup(table, groupId);
return group;
}
public void deleteGroup(String groupId) {
try {
admin.disableTable(table.getTableName());
admin.deleteColumn(table.getTableName(),groupId.getBytes());
admin.enableTable(table.getTableName());
} catch (IOException e) {
System.out.println("Error: Deleting the group "+groupId);
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
}
}
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