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package parallelai.spyglass.hbase;
import java.io.IOException;
import cascading.tap.SinkMode;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.mapred.RecordWriter;
import org.apache.hadoop.mapred.Reporter;
/**
* Convert Reduce output (key, value) to (HStoreKey, KeyedDataArrayWritable)
* and write to an HBase table
*/
public class HBaseRecordWriter
implements RecordWriter<ImmutableBytesWritable, Put> {
private HTable m_table;
private SinkMode m_sinkMode = SinkMode.UPDATE;
/**
* Instantiate a TableRecordWriter with the HBase HClient for writing.
*
* @param table
*/
public HBaseRecordWriter(HTable table) {
m_table = table;
}
public void close(Reporter reporter)
throws IOException {
m_table.close();
}
public void setSinkMode(SinkMode sinkMode) {
m_sinkMode = sinkMode;
}
public void write(ImmutableBytesWritable key,
Put value) throws IOException {
switch(m_sinkMode) {
case UPDATE:
m_table.put(new Put(value));
break;
case REPLACE:
m_table.delete(new Delete(value.getRow()));
break;
default:
throw new IOException("Unknown Sink Mode : " + m_sinkMode);
}
}
}
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