/**
* Sweeps the mob files on one column family. It deletes the unused mob files and merges the small
* mob files into bigger ones.
*
* @param tableName The current table name in string format.
* @param familyName The column family name.
* @return 0 if success, 2 if job aborted with an exception, 3 if unable to start due to other
* compaction,4 if mr job was unsuccessful
* @throws IOException
* @throws InterruptedException
* @throws ClassNotFoundException
* @throws KeeperException
* @throws ServiceException
*/
int sweepFamily(String tableName, String familyName)
throws IOException, InterruptedException, ClassNotFoundException, KeeperException,
ServiceException {
Configuration conf = getConf();
// make sure the target HBase exists.
HBaseAdmin.checkHBaseAvailable(conf);
Connection connection = ConnectionFactory.createConnection(getConf());
Admin admin = connection.getAdmin();
try {
FileSystem fs = FileSystem.get(conf);
TableName tn = TableName.valueOf(tableName);
HTableDescriptor htd = admin.getTableDescriptor(tn);
HColumnDescriptor family = htd.getFamily(Bytes.toBytes(familyName));
if (family == null || !family.isMobEnabled()) {
throw new IOException("Column family " + familyName + " is not a MOB column family");
}
SweepJob job = new SweepJob(conf, fs);
// Run the sweeping
return job.sweep(tn, family);
} catch (Exception e) {
System.err.println("Job aborted due to exception " + e);
return 2; // job failed
} finally {
try {
admin.close();
} catch (IOException e) {
System.out.println("Failed to close the HBaseAdmin: " + e.getMessage());
}
try {
connection.close();
} catch (IOException e) {
System.out.println("Failed to close the connection: " + e.getMessage());
}
}
}
private static void createTable() throws Exception {
try {
Configuration configuration = HBaseConfiguration.create();
HBaseAdmin.checkHBaseAvailable(configuration);
Connection connection = ConnectionFactory.createConnection(configuration);
// Instantiating HbaseAdmin class
Admin admin = connection.getAdmin();
// Instantiating table descriptor class
HTableDescriptor stockTableDesc =
new HTableDescriptor(TableName.valueOf(Constants.STOCK_DATES_TABLE));
// Adding column families to table descriptor
HColumnDescriptor stock_0414 = new HColumnDescriptor(Constants.STOCK_DATES_CF);
stockTableDesc.addFamily(stock_0414);
// Execute the table through admin
if (!admin.tableExists(stockTableDesc.getTableName())) {
admin.createTable(stockTableDesc);
System.out.println("Stock table created !!!");
}
// Load hbase-site.xml
HBaseConfiguration.addHbaseResources(configuration);
} catch (ServiceException e) {
log.error("Error occurred while creating HBase tables", e);
throw new Exception("Error occurred while creating HBase tables", e);
}
}