Examples with Listener org.apache.accumulo.server.master.LiveTServerSet.Listener used on opensource projects

Example 1 with Listener

use of org.apache.accumulo.server.master.LiveTServerSet.Listener in project accumulo by apache.

the class FindOfflineTablets method findOffline.

static int findOffline(ClientContext context, String tableName) throws AccumuloException, TableNotFoundException {
    final AtomicBoolean scanning = new AtomicBoolean(false);
    LiveTServerSet tservers = new LiveTServerSet(context, new Listener() {

        @Override
        public void update(LiveTServerSet current, Set<TServerInstance> deleted, Set<TServerInstance> added) {
            if (!deleted.isEmpty() && scanning.get())
                log.warn("Tablet servers deleted while scanning: {}", deleted);
            if (!added.isEmpty() && scanning.get())
                log.warn("Tablet servers added while scanning: {}", added);
        }
    });
    tservers.startListeningForTabletServerChanges();
    scanning.set(true);
    Iterator<TabletLocationState> zooScanner;
    try {
        zooScanner = new ZooTabletStateStore().iterator();
    } catch (DistributedStoreException e) {
        throw new AccumuloException(e);
    }
    int offline = 0;
    System.out.println("Scanning zookeeper");
    if ((offline = checkTablets(zooScanner, tservers)) > 0)
        return offline;
    if (RootTable.NAME.equals(tableName))
        return 0;
    System.out.println("Scanning " + RootTable.NAME);
    Iterator<TabletLocationState> rootScanner = new MetaDataTableScanner(context, MetadataSchema.TabletsSection.getRange(), RootTable.NAME);
    if ((offline = checkTablets(rootScanner, tservers)) > 0)
        return offline;
    if (MetadataTable.NAME.equals(tableName))
        return 0;
    System.out.println("Scanning " + MetadataTable.NAME);
    Range range = MetadataSchema.TabletsSection.getRange();
    if (tableName != null) {
        Table.ID tableId = Tables.getTableId(context.getInstance(), tableName);
        range = new KeyExtent(tableId, null, null).toMetadataRange();
    }
    try (MetaDataTableScanner metaScanner = new MetaDataTableScanner(context, range, MetadataTable.NAME)) {
        return checkTablets(metaScanner, tservers);
    }
}