Java Code Examples for org.apache.hadoop.hbase.client.Get#readVersions()
The following examples show how to use
org.apache.hadoop.hbase.client.Get#readVersions() .
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Example 1
Source File: ThriftHBaseServiceHandler.java From hbase with Apache License 2.0 | 6 votes |
/** * Note: this public interface is slightly different from public Java APIs in regard to * handling of the qualifier. Here we differ from the public Java API in that null != byte[0]. * Rather, we respect qual == null as a request for the entire column family. If you want to * access the entire column family, use * {@link #getVer(ByteBuffer, ByteBuffer, ByteBuffer, int, Map)} with a {@code column} value * that lacks a {@code ':'}. */ public List<TCell> getVer(ByteBuffer tableName, ByteBuffer row, byte[] family, byte[] qualifier, int numVersions, Map<ByteBuffer, ByteBuffer> attributes) throws IOError { Table table = null; try { table = getTable(tableName); Get get = new Get(getBytes(row)); addAttributes(get, attributes); if (null == qualifier) { get.addFamily(family); } else { get.addColumn(family, qualifier); } get.readVersions(numVersions); Result result = table.get(get); return ThriftUtilities.cellFromHBase(result.rawCells()); } catch (IOException e) { LOG.warn(e.getMessage(), e); throw getIOError(e); } finally{ closeTable(table); } }
Example 2
Source File: ThriftHBaseServiceHandler.java From hbase with Apache License 2.0 | 6 votes |
/** * Note: this internal interface is slightly different from public APIs in regard to handling * of the qualifier. Here we differ from the public Java API in that null != byte[0]. Rather, * we respect qual == null as a request for the entire column family. The caller ( * {@link #getVerTs(ByteBuffer, ByteBuffer, ByteBuffer, long, int, Map)}) interface IS * consistent in that the column is parse like normal. */ protected List<TCell> getVerTs(ByteBuffer tableName, ByteBuffer row, byte[] family, byte[] qualifier, long timestamp, int numVersions, Map<ByteBuffer, ByteBuffer> attributes) throws IOError { Table table = null; try { table = getTable(tableName); Get get = new Get(getBytes(row)); addAttributes(get, attributes); if (null == qualifier) { get.addFamily(family); } else { get.addColumn(family, qualifier); } get.setTimeRange(0, timestamp); get.readVersions(numVersions); Result result = table.get(get); return ThriftUtilities.cellFromHBase(result.rawCells()); } catch (IOException e) { LOG.warn(e.getMessage(), e); throw getIOError(e); } finally{ closeTable(table); } }
Example 3
Source File: BackupSystemTable.java From hbase with Apache License 2.0 | 5 votes |
/** * Creates Get operation for a given backup id * @param backupId backup's ID * @return get operation * @throws IOException exception */ private Get createGetForBackupInfo(String backupId) throws IOException { Get get = new Get(rowkey(BACKUP_INFO_PREFIX, backupId)); get.addFamily(BackupSystemTable.SESSIONS_FAMILY); get.readVersions(1); return get; }
Example 4
Source File: BackupSystemTable.java From hbase with Apache License 2.0 | 5 votes |
/** * Creates Get operation to retrieve start code from backup system table * @return get operation * @throws IOException exception */ private Get createGetForStartCode(String rootPath) throws IOException { Get get = new Get(rowkey(START_CODE_ROW, rootPath)); get.addFamily(BackupSystemTable.META_FAMILY); get.readVersions(1); return get; }
Example 5
Source File: BackupSystemTable.java From hbase with Apache License 2.0 | 5 votes |
/** * Creates Get to retrieve incremental backup table set from backup system table * @return get operation * @throws IOException exception */ private Get createGetForIncrBackupTableSet(String backupRoot) throws IOException { Get get = new Get(rowkey(INCR_BACKUP_SET, backupRoot)); get.addFamily(BackupSystemTable.META_FAMILY); get.readVersions(1); return get; }
Example 6
Source File: TestCoprocessorScanPolicy.java From hbase with Apache License 2.0 | 5 votes |
@Override public void preGetOp(ObserverContext<RegionCoprocessorEnvironment> c, Get get, List<Cell> result) throws IOException { TableName tableName = c.getEnvironment().getRegion().getTableDescriptor().getTableName(); Long ttl = this.ttls.get(tableName); if (ttl != null) { get.setTimeRange(EnvironmentEdgeManager.currentTime() - ttl, get.getTimeRange().getMax()); } Integer version = this.versions.get(tableName); if (version != null) { get.readVersions(version); } }
Example 7
Source File: TestSerialization.java From hbase with Apache License 2.0 | 5 votes |
@Test public void testGet() throws Exception { byte[] row = Bytes.toBytes("row"); byte[] fam = Bytes.toBytes("fam"); byte[] qf1 = Bytes.toBytes("qf1"); long ts = System.currentTimeMillis(); int maxVersions = 2; Get get = new Get(row); get.addColumn(fam, qf1); get.setTimeRange(ts, ts + 1); get.readVersions(maxVersions); ClientProtos.Get getProto = ProtobufUtil.toGet(get); Get desGet = ProtobufUtil.toGet(getProto); assertTrue(Bytes.equals(get.getRow(), desGet.getRow())); Set<byte[]> set = null; Set<byte[]> desSet = null; for (Map.Entry<byte[], NavigableSet<byte[]>> entry : get.getFamilyMap().entrySet()) { assertTrue(desGet.getFamilyMap().containsKey(entry.getKey())); set = entry.getValue(); desSet = desGet.getFamilyMap().get(entry.getKey()); for (byte[] qualifier : set) { assertTrue(desSet.contains(qualifier)); } } assertEquals(get.getMaxVersions(), desGet.getMaxVersions()); TimeRange tr = get.getTimeRange(); TimeRange desTr = desGet.getTimeRange(); assertEquals(tr.getMax(), desTr.getMax()); assertEquals(tr.getMin(), desTr.getMin()); }
Example 8
Source File: TestRemoteTable.java From hbase with Apache License 2.0 | 5 votes |
@Test public void testMultiGet() throws Exception { ArrayList<Get> gets = new ArrayList<>(2); gets.add(new Get(ROW_1)); gets.add(new Get(ROW_2)); Result[] results = remoteTable.get(gets); assertNotNull(results); assertEquals(2, results.length); assertEquals(1, results[0].size()); assertEquals(2, results[1].size()); //Test Versions gets = new ArrayList<>(2); Get g = new Get(ROW_1); g.readVersions(3); gets.add(g); gets.add(new Get(ROW_2)); results = remoteTable.get(gets); assertNotNull(results); assertEquals(2, results.length); assertEquals(1, results[0].size()); assertEquals(3, results[1].size()); //404 gets = new ArrayList<>(1); gets.add(new Get(Bytes.toBytes("RESALLYREALLYNOTTHERE"))); results = remoteTable.get(gets); assertNotNull(results); assertEquals(0, results.length); gets = new ArrayList<>(3); gets.add(new Get(Bytes.toBytes("RESALLYREALLYNOTTHERE"))); gets.add(new Get(ROW_1)); gets.add(new Get(ROW_2)); results = remoteTable.get(gets); assertNotNull(results); assertEquals(2, results.length); }
Example 9
Source File: ThriftUtilities.java From hbase with Apache License 2.0 | 4 votes |
/** * Creates a {@link Get} (HBase) from a {@link TGet} (Thrift). * * This ignores any timestamps set on {@link TColumn} objects. * * @param in the <code>TGet</code> to convert * * @return <code>Get</code> object * * @throws IOException if an invalid time range or max version parameter is given */ public static Get getFromThrift(TGet in) throws IOException { Get out = new Get(in.getRow()); // Timestamp overwrites time range if both are set if (in.isSetTimestamp()) { out.setTimestamp(in.getTimestamp()); } else if (in.isSetTimeRange()) { out.setTimeRange(in.getTimeRange().getMinStamp(), in.getTimeRange().getMaxStamp()); } if (in.isSetMaxVersions()) { out.readVersions(in.getMaxVersions()); } if (in.isSetFilterString()) { ParseFilter parseFilter = new ParseFilter(); out.setFilter(parseFilter.parseFilterString(in.getFilterString())); } if (in.isSetAttributes()) { addAttributes(out,in.getAttributes()); } if (in.isSetAuthorizations()) { out.setAuthorizations(new Authorizations(in.getAuthorizations().getLabels())); } if (in.isSetConsistency()) { out.setConsistency(consistencyFromThrift(in.getConsistency())); } if (in.isSetTargetReplicaId()) { out.setReplicaId(in.getTargetReplicaId()); } if (in.isSetCacheBlocks()) { out.setCacheBlocks(in.isCacheBlocks()); } if (in.isSetStoreLimit()) { out.setMaxResultsPerColumnFamily(in.getStoreLimit()); } if (in.isSetStoreOffset()) { out.setRowOffsetPerColumnFamily(in.getStoreOffset()); } if (in.isSetExistence_only()) { out.setCheckExistenceOnly(in.isExistence_only()); } if (in.isSetColumns()) { for (TColumn column : in.getColumns()) { if (column.isSetQualifier()) { out.addColumn(column.getFamily(), column.getQualifier()); } else { out.addFamily(column.getFamily()); } } } if (in.isSetFilterBytes()) { out.setFilter(filterFromThrift(in.getFilterBytes())); } return out; }
Example 10
Source File: TestThriftConnection.java From hbase with Apache License 2.0 | 4 votes |
public void testMultiGet(Connection connection, String tableName) throws Exception { createTable(thriftAdmin, tableName); try (Table table = connection.getTable(TableName.valueOf(tableName))){ ArrayList<Get> gets = new ArrayList<>(2); gets.add(new Get(ROW_1)); gets.add(new Get(ROW_2)); Result[] results = table.get(gets); assertNotNull(results); assertEquals(2, results.length); assertEquals(1, results[0].size()); assertEquals(2, results[1].size()); //Test Versions gets = new ArrayList<>(2); Get g = new Get(ROW_1); g.readVersions(3); gets.add(g); Get get2 = new Get(ROW_2); get2.readVersions(3); gets.add(get2); results = table.get(gets); assertNotNull(results); assertEquals(2, results.length); assertEquals(1, results[0].size()); assertEquals(3, results[1].size()); gets = new ArrayList<>(1); gets.add(new Get(Bytes.toBytes("RESALLYREALLYNOTTHERE"))); results = table.get(gets); assertNotNull(results); assertTrue(results[0].isEmpty()); gets = new ArrayList<>(3); gets.add(new Get(Bytes.toBytes("RESALLYREALLYNOTTHERE"))); gets.add(new Get(ROW_1)); gets.add(new Get(ROW_2)); results = table.get(gets); assertNotNull(results); assertEquals(3, results.length); assertTrue(results[0].isEmpty()); } }
Example 11
Source File: RowResultGenerator.java From hbase with Apache License 2.0 | 4 votes |
public RowResultGenerator(final String tableName, final RowSpec rowspec, final Filter filter, final boolean cacheBlocks) throws IllegalArgumentException, IOException { try (Table table = RESTServlet.getInstance().getTable(tableName)) { Get get = new Get(rowspec.getRow()); if (rowspec.hasColumns()) { for (byte[] col : rowspec.getColumns()) { byte[][] split = CellUtil.parseColumn(col); if (split.length == 1) { get.addFamily(split[0]); } else if (split.length == 2) { get.addColumn(split[0], split[1]); } else { throw new IllegalArgumentException("Invalid column specifier."); } } } get.setTimeRange(rowspec.getStartTime(), rowspec.getEndTime()); get.readVersions(rowspec.getMaxVersions()); if (filter != null) { get.setFilter(filter); } get.setCacheBlocks(cacheBlocks); Result result = table.get(get); if (result != null && !result.isEmpty()) { valuesI = result.listCells().iterator(); } } catch (DoNotRetryIOException e) { // Warn here because Stargate will return 404 in the case if multiple // column families were specified but one did not exist -- currently // HBase will fail the whole Get. // Specifying multiple columns in a URI should be uncommon usage but // help to avoid confusion by leaving a record of what happened here in // the log. LOG.warn(StringUtils.stringifyException(e)); // Lets get the exception rethrown to get a more meaningful error message than 404 if (e instanceof AccessDeniedException) { throw e; } } }