Examples with AsyncTable org.apache.hadoop.hbase.client.AsyncTable used on opensource projects

Example 11 with AsyncTable

use of org.apache.hadoop.hbase.client.AsyncTable in project hbase by apache.

the class ClientMetaTableAccessor method getRegionLocation.

/**
 * Returns the HRegionLocation from meta for the given region
 * @param metaTable
 * @param regionName region we're looking for
 * @return HRegionLocation for the given region
 */
public static CompletableFuture<Optional<HRegionLocation>> getRegionLocation(AsyncTable<?> metaTable, byte[] regionName) {
    CompletableFuture<Optional<HRegionLocation>> future = new CompletableFuture<>();
    try {
        RegionInfo parsedRegionInfo = CatalogFamilyFormat.parseRegionInfoFromRegionName(regionName);
        addListener(metaTable.get(new Get(CatalogFamilyFormat.getMetaKeyForRegion(parsedRegionInfo)).addFamily(HConstants.CATALOG_FAMILY)), (r, err) -> {
            if (err != null) {
                future.completeExceptionally(err);
                return;
            }
            future.complete(getRegionLocations(r).map(locations -> locations.getRegionLocation(parsedRegionInfo.getReplicaId())));
        });
    } catch (IOException parseEx) {
        LOG.warn("Failed to parse the passed region name: " + Bytes.toStringBinary(regionName));
        future.completeExceptionally(parseEx);
    }
    return future;
}

Example 12 with AsyncTable

use of org.apache.hadoop.hbase.client.AsyncTable in project hbase by apache.

the class TestMasterRepairMode method testExistingCluster.

@Test
public void testExistingCluster() throws Exception {
    TableName testRepairMode = TableName.valueOf(name.getMethodName());
    TEST_UTIL.startMiniCluster();
    Table t = TEST_UTIL.createTable(testRepairMode, FAMILYNAME);
    Put p = new Put(Bytes.toBytes("r"));
    p.addColumn(FAMILYNAME, Bytes.toBytes("c"), new byte[0]);
    t.put(p);
    TEST_UTIL.shutdownMiniHBaseCluster();
    LOG.info("Starting master-only");
    enableMaintenanceMode();
    TEST_UTIL.startMiniHBaseCluster(StartTestingClusterOption.builder().numRegionServers(0).createRootDir(false).build());
    Connection conn = TEST_UTIL.getConnection();
    assertTrue(conn.getAdmin().isMasterInMaintenanceMode());
    try (Table table = conn.getTable(TableName.META_TABLE_NAME);
        ResultScanner scanner = table.getScanner(HConstants.TABLE_FAMILY);
        Stream<Result> results = StreamSupport.stream(scanner.spliterator(), false)) {
        assertTrue("Did not find user table records while reading hbase:meta", results.anyMatch(r -> Arrays.equals(r.getRow(), testRepairMode.getName())));
    }
    // use async table so we can set the timeout and retry value to let the operation fail fast
    AsyncTable<?> table = conn.toAsyncConnection().getTableBuilder(testRepairMode).setScanTimeout(5, TimeUnit.SECONDS).setMaxRetries(2).build();
    assertThrows("Should not be able to access user-space tables in repair mode.", Exception.class, () -> {
        try (ResultScanner scanner = table.getScanner(new Scan())) {
            scanner.next();
        }
    });
}