Database Reference
In-Depth Information
//start and finish are the range of columns--here, all
SlicePredicate predicate = new SlicePredicate();
SliceRange sliceRange = new SliceRange();
sliceRange.setStart(new byte[0]);
sliceRange.setFinish(new byte[0]);
predicate.setSlice_range(sliceRange);
LOG.debug("Complete Row:");
// read all columns in the row
ColumnParent parent = new ColumnParent(cfName);
List<ColumnOrSuperColumn> results =
client.get_slice(userIDKey,
parent, predicate, CL);
//loop over columns, outputting values
for (ColumnOrSuperColumn result : results) {
Column column = result.column;
LOG.debug(new String(column.name, UTF8) + " : "
+ new String(column.value, UTF8));
}
tf.close();
LOG.debug("All done.");
}
}
Running this example will output the following:
DEBUG 14:02:09,572 Inserting row for key 1
DEBUG 14:02:09,580 Row insert done.
DEBUG 14:02:09,580 Reading Name Column:
DEBUG 14:02:09,585 Column name: name
DEBUG 14:02:09,586 Column value: George Clinton
DEBUG 14:02:09,586 Column timestamp: 1284325329569
DEBUG 14:02:09,589 Complete Row:
DEBUG 14:02:09,594 age : 69
DEBUG 14:02:09,594 name : George Clinton
DEBUG 14:02:09,594 All done.
NOTE
This isn't Cassandra-specific, but in Java you can easily get a more user-friendly representation of
a date by wrapping the
long
timestamp output with a new
Date
object, like this:
new
Date(col.timestamp);
.
