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package parallelai.spyglass.hbase;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.lang.SerializationUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.mapred.InputSplit;
public class HBaseMultiInputSplit implements InputSplit,
Comparable<HBaseMultiInputSplit>, Serializable {
private final Log LOG = LogFactory.getLog(HBaseMultiInputSplit.class);
private List<HBaseTableSplit> splits = new ArrayList<HBaseTableSplit>();
private String regionLocation = null;
/** default constructor */
private HBaseMultiInputSplit() {
}
public HBaseMultiInputSplit(String regionLocation) {
this.regionLocation = regionLocation;
}
/** @return the region's hostname */
public String getRegionLocation() {
LOG.debug("REGION GETTER : " + regionLocation);
return this.regionLocation;
}
@Override
public void readFields(DataInput in) throws IOException {
LOG.debug("READ ME : " + in.toString());
int s = Bytes.toInt(Bytes.readByteArray(in));
for (int i = 0; i < s; i++) {
HBaseTableSplit hbts = (HBaseTableSplit) SerializationUtils
.deserialize(Bytes.readByteArray(in));
splits.add(hbts);
}
LOG.debug("READ and CREATED : " + this);
}
@Override
public void write(DataOutput out) throws IOException {
LOG.debug("WRITE : " + this);
Bytes.writeByteArray(out, Bytes.toBytes(splits.size()));
for (HBaseTableSplit hbts : splits) {
Bytes.writeByteArray(out, SerializationUtils.serialize(hbts));
}
LOG.debug("WROTE : " + out.toString());
}
@Override
public String toString() {
StringBuffer str = new StringBuffer();
str.append("HBaseMultiSplit : ");
for (HBaseTableSplit hbt : splits) {
str.append(" [" + hbt.toString() + "]");
}
return str.toString();
}
@Override
public int compareTo(HBaseMultiInputSplit o) {
// TODO: Make this comparison better
return (splits.size() - o.splits.size());
}
@Override
public long getLength() throws IOException {
return splits.size();
}
@Override
public String[] getLocations() throws IOException {
LOG.debug("REGION ARRAY : " + regionLocation);
return new String[] { this.regionLocation };
}
public void addSplit(HBaseTableSplit hbt) throws IOException {
if (hbt.getRegionLocation().equals(regionLocation))
splits.add(hbt);
else
throw new IOException("HBaseTableSplit Region Location "
+ hbt.getRegionLocation()
+ " does NOT match MultiSplit Region Location " + regionLocation);
}
public List<HBaseTableSplit> getSplits() {
return splits;
}
}
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