/**
* Method to execute a Delete mutation operation on Hypertable. A delete is implemented by
* Hypertable as a put that inserts tombstone values.
*
* @param tableName
* @param delete
* @throws ClientException
* @throws TException
*/
public void delete(String tableName, Delete delete) throws ClientException, TException {
long mutator = client.mutator_open(ns, tableName, 0, 0);
for (int i = 0; i < delete._getCells().size(); i++) {
Cell c = delete._getCells().get(i);
if (c.getKey().isSetRevision()) {
int revs = (int) c.getKey().getRevision();
System.out.println(revs);
String cfam = c.getKey().getColumn_family();
String cqual = c.getKey().getColumn_qualifier();
c.getKey().setRevisionIsSet(false);
List<Result> res =
this.scan(
tableName, new Scan(delete.getRowkey()).addColumn(cfam, cqual).setRevisions(revs));
if (!res.isEmpty()) {
System.out.println(res.get(0).getValueRevisions(cfam, cqual));
for (Long ts : res.get(0).getTimestampRevisions(cfam, cqual))
delete.deleteColumn(cfam, cqual, ts);
}
delete._getCells().remove(i--);
}
}
try {
if (delete._getCells().size() > 1) client.mutator_set_cells(mutator, delete._getCells());
else if (delete._getCells().size() == 1)
client.mutator_set_cell(mutator, delete._getCells().get(0));
} finally {
client.mutator_close(mutator);
}
}
/**
* Method to execute a Scan operation on Hypertable.
*
* @param tablename
* @param scan
* @return
* @throws ClientException
* @throws TException
*/
public List<Result> scan(String tablename, Scan scan) throws ClientException, TException {
long scanner = client.scanner_open(ns, tablename, scan._getScanSpec());
HashMap<String, List<Cell>> buckets = new HashMap<String, List<Cell>>();
try {
List<Cell> cells = client.scanner_get_cells(scanner);
while (cells.size() > 0) {
for (Cell cell : cells) {
String row = cell.getKey().getRow();
if (buckets.get(row) == null) buckets.put(row, new LinkedList<Cell>());
buckets.get(row).add(cell);
}
cells = client.scanner_get_cells(scanner);
}
} finally {
client.scanner_close(scanner);
}
List<Result> reslist = new LinkedList<Result>();
for (String row : buckets.keySet()) {
reslist.add(new Result(row, buckets.get(row)));
}
return reslist;
}
