public static void deleteTable(
String tableId, boolean insertDeletes, Credentials credentials, ZooLock lock)
throws AccumuloException, IOException {
Scanner ms =
new ScannerImpl(
HdfsZooInstance.getInstance(), credentials, MetadataTable.ID, Authorizations.EMPTY);
Text tableIdText = new Text(tableId);
BatchWriter bw =
new BatchWriterImpl(
HdfsZooInstance.getInstance(),
credentials,
MetadataTable.ID,
new BatchWriterConfig()
.setMaxMemory(1000000)
.setMaxLatency(120000l, TimeUnit.MILLISECONDS)
.setMaxWriteThreads(2));
// scan metadata for our table and delete everything we find
Mutation m = null;
ms.setRange(new KeyExtent(tableIdText, null, null).toMetadataRange());
// insert deletes before deleting data from metadata... this makes the code fault tolerant
if (insertDeletes) {
ms.fetchColumnFamily(DataFileColumnFamily.NAME);
TabletsSection.ServerColumnFamily.DIRECTORY_COLUMN.fetch(ms);
for (Entry<Key, Value> cell : ms) {
Key key = cell.getKey();
if (key.getColumnFamily().equals(DataFileColumnFamily.NAME)) {
FileRef ref = new FileRef(VolumeManagerImpl.get(), key);
bw.addMutation(createDeleteMutation(tableId, ref.meta().toString()));
}
if (TabletsSection.ServerColumnFamily.DIRECTORY_COLUMN.hasColumns(key)) {
bw.addMutation(createDeleteMutation(tableId, cell.getValue().toString()));
}
}
bw.flush();
ms.clearColumns();
}
for (Entry<Key, Value> cell : ms) {
Key key = cell.getKey();
if (m == null) {
m = new Mutation(key.getRow());
if (lock != null) putLockID(lock, m);
}
if (key.getRow().compareTo(m.getRow(), 0, m.getRow().length) != 0) {
bw.addMutation(m);
m = new Mutation(key.getRow());
if (lock != null) putLockID(lock, m);
}
m.putDelete(key.getColumnFamily(), key.getColumnQualifier());
}
if (m != null) bw.addMutation(m);
bw.close();
}
