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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.TreeSet;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.mapred.InputSplit;
import com.sun.tools.javac.resources.version;
import parallelai.spyglass.hbase.HBaseConstants.SourceMode;
public class HBaseTableSplit implements InputSplit, Comparable<HBaseTableSplit>, Serializable {
private final Log LOG = LogFactory.getLog(HBaseTableSplit.class);
private byte [] m_tableName = null;
private byte [] m_startRow = null;
private byte [] m_endRow = null;
private String m_regionLocation = null;
private TreeSet<String> m_keyList = null;
private SourceMode m_sourceMode = SourceMode.EMPTY;
private boolean m_endRowInclusive = true;
private int m_versions = 1;
private boolean m_useSalt = false;
/** default constructor */
public HBaseTableSplit() {
this(HConstants.EMPTY_BYTE_ARRAY, HConstants.EMPTY_BYTE_ARRAY,
HConstants.EMPTY_BYTE_ARRAY, "", SourceMode.EMPTY, false);
}
/**
* Constructor
* @param tableName
* @param startRow
* @param endRow
* @param location
*/
public HBaseTableSplit(final byte [] tableName, final byte [] startRow, final byte [] endRow,
final String location, final SourceMode sourceMode, final boolean useSalt) {
this.m_tableName = tableName;
this.m_startRow = startRow;
this.m_endRow = endRow;
this.m_regionLocation = location;
this.m_sourceMode = sourceMode;
this.m_useSalt = useSalt;
}
public HBaseTableSplit( final byte [] tableName, final TreeSet<String> keyList, int versions, final String location, final SourceMode sourceMode, final boolean useSalt ) {
this.m_tableName = tableName;
this.m_keyList = keyList;
this.m_versions = versions;
this.m_sourceMode = sourceMode;
this.m_regionLocation = location;
this.m_useSalt = useSalt;
}
/** @return table name */
public byte [] getTableName() {
return this.m_tableName;
}
/** @return starting row key */
public byte [] getStartRow() {
return this.m_startRow;
}
/** @return end row key */
public byte [] getEndRow() {
return this.m_endRow;
}
public boolean getEndRowInclusive() {
return m_endRowInclusive;
}
public void setEndRowInclusive(boolean isInclusive) {
m_endRowInclusive = isInclusive;
}
/** @return list of keys to get */
public TreeSet<String> getKeyList() {
return m_keyList;
}
public int getVersions() {
return m_versions;
}
/** @return get the source mode */
public SourceMode getSourceMode() {
return m_sourceMode;
}
public boolean getUseSalt() {
return m_useSalt;
}
/** @return the region's hostname */
public String getRegionLocation() {
LOG.debug("REGION GETTER : " + m_regionLocation);
return this.m_regionLocation;
}
public String[] getLocations() {
LOG.debug("REGION ARRAY : " + m_regionLocation);
return new String[] {this.m_regionLocation};
}
@Override
public long getLength() {
// Not clear how to obtain this... seems to be used only for sorting splits
return 0;
}
@Override
public void readFields(DataInput in) throws IOException {
LOG.debug("READ ME : " + in.toString());
this.m_tableName = Bytes.readByteArray(in);
this.m_regionLocation = Bytes.toString(Bytes.readByteArray(in));
this.m_sourceMode = SourceMode.valueOf(Bytes.toString(Bytes.readByteArray(in)));
this.m_useSalt = Bytes.toBoolean(Bytes.readByteArray(in));
switch(this.m_sourceMode) {
case SCAN_RANGE:
this.m_startRow = Bytes.readByteArray(in);
this.m_endRow = Bytes.readByteArray(in);
this.m_endRowInclusive = Bytes.toBoolean(Bytes.readByteArray(in));
break;
case GET_LIST:
this.m_versions = Bytes.toInt(Bytes.readByteArray(in));
this.m_keyList = new TreeSet<String>();
int m = Bytes.toInt(Bytes.readByteArray(in));
for( int i = 0; i < m; i++) {
this.m_keyList.add(Bytes.toString(Bytes.readByteArray(in)));
}
break;
}
LOG.debug("READ and CREATED : " + this);
}
@Override
public void write(DataOutput out) throws IOException {
LOG.debug("WRITE : " + this);
Bytes.writeByteArray(out, this.m_tableName);
Bytes.writeByteArray(out, Bytes.toBytes(this.m_regionLocation));
Bytes.writeByteArray(out, Bytes.toBytes(this.m_sourceMode.name()));
Bytes.writeByteArray(out, Bytes.toBytes(this.m_useSalt));
switch( this.m_sourceMode ) {
case SCAN_RANGE:
Bytes.writeByteArray(out, this.m_startRow);
Bytes.writeByteArray(out, this.m_endRow);
Bytes.writeByteArray(out, Bytes.toBytes(this.m_endRowInclusive));
break;
case GET_LIST:
Bytes.writeByteArray(out, Bytes.toBytes(m_versions));
Bytes.writeByteArray(out, Bytes.toBytes(this.m_keyList.size()));
for( String k: this.m_keyList ) {
Bytes.writeByteArray(out, Bytes.toBytes(k));
}
break;
}
LOG.debug("WROTE : " + out.toString());
}
@Override
public String toString() {
return String.format("Table Name (%s) Region (%s) Source Mode (%s) Start Key (%s) Stop Key (%s) Key List Size (%s) Versions (%s) Use Salt (%s)",
Bytes.toString(m_tableName), m_regionLocation, m_sourceMode, Bytes.toString(m_startRow), Bytes.toString(m_endRow),
(m_keyList != null) ? m_keyList.size() : "EMPTY", m_versions, m_useSalt);
}
@Override
public int compareTo(HBaseTableSplit o) {
switch(m_sourceMode) {
case SCAN_ALL:
case SCAN_RANGE:
return Bytes.compareTo(getStartRow(), o.getStartRow());
case GET_LIST:
return m_keyList.equals( o.getKeyList() ) ? 0 : -1;
default:
return -1;
}
}
}
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