Examples with RegionScanner org.apache.hadoop.hbase.regionserver.RegionScanner used on opensource projects

Example 46 with RegionScanner

use of org.apache.hadoop.hbase.regionserver.RegionScanner in project phoenix by apache.

the class LocalTable method getCurrentRowState.

@Override
public Result getCurrentRowState(Mutation m, Collection<? extends ColumnReference> columns, boolean ignoreNewerMutations) throws IOException {
    byte[] row = m.getRow();
    // need to use a scan here so we can get raw state, which Get doesn't provide.
    Scan s = IndexManagementUtil.newLocalStateScan(Collections.singletonList(columns));
    s.setStartRow(row);
    s.setStopRow(row);
    if (ignoreNewerMutations) {
        // Provides a means of client indicating that newer cells should not be considered,
        // enabling mutations to be replayed to partially rebuild the index when a write fails.
        // When replaying mutations we want the oldest timestamp (as anything newer we be replayed)
        long ts = getOldestTimestamp(m.getFamilyCellMap().values());
        s.setTimeRange(0, ts);
    }
    Region region = this.env.getRegion();
    RegionScanner scanner = region.getScanner(s);
    List<Cell> kvs = new ArrayList<Cell>(1);
    boolean more = scanner.next(kvs);
    assert !more : "Got more than one result when scanning" + " a single row in the primary table!";
    Result r = Result.create(kvs);
    scanner.close();
    return r;
}

Example 47 with RegionScanner

use of org.apache.hadoop.hbase.regionserver.RegionScanner in project phoenix by apache.

the class MetaDataEndpointImpl method buildDeletedSchema.

private PSchema buildDeletedSchema(byte[] key, ImmutableBytesPtr cacheKey, Region region, long clientTimeStamp) throws IOException {
    if (clientTimeStamp == HConstants.LATEST_TIMESTAMP) {
        return null;
    }
    Scan scan = MetaDataUtil.newTableRowsScan(key, clientTimeStamp, HConstants.LATEST_TIMESTAMP);
    scan.setFilter(new FirstKeyOnlyFilter());
    scan.setRaw(true);
    List<Cell> results = Lists.<Cell>newArrayList();
    try (RegionScanner scanner = region.getScanner(scan)) {
        scanner.next(results);
    }
    // HBase ignores the time range on a raw scan (HBASE-7362)
    if (!results.isEmpty() && results.get(0).getTimestamp() > clientTimeStamp) {
        Cell kv = results.get(0);
        if (kv.getTypeByte() == Type.Delete.getCode()) {
            Cache<ImmutableBytesPtr, PMetaDataEntity> metaDataCache = GlobalCache.getInstance(this.env).getMetaDataCache();
            PSchema schema = newDeletedSchemaMarker(kv.getTimestamp());
            metaDataCache.put(cacheKey, schema);
            return schema;
        }
    }
    return null;
}

Example 48 with RegionScanner

use of org.apache.hadoop.hbase.regionserver.RegionScanner in project phoenix by apache.

the class MetaDataEndpointImpl method buildFunctions.

private List<PFunction> buildFunctions(List<byte[]> keys, Region region, long clientTimeStamp, boolean isReplace, List<Mutation> deleteMutationsForReplace) throws IOException, SQLException {
    List<KeyRange> keyRanges = Lists.newArrayListWithExpectedSize(keys.size());
    for (byte[] key : keys) {
        byte[] stopKey = ByteUtil.concat(key, QueryConstants.SEPARATOR_BYTE_ARRAY);
        ByteUtil.nextKey(stopKey, stopKey.length);
        keyRanges.add(PVarbinary.INSTANCE.getKeyRange(key, true, stopKey, false));
    }
    Scan scan = new Scan();
    scan.setTimeRange(MIN_TABLE_TIMESTAMP, clientTimeStamp);
    ScanRanges scanRanges = ScanRanges.createPointLookup(keyRanges);
    scanRanges.initializeScan(scan);
    scan.setFilter(scanRanges.getSkipScanFilter());
    RegionScanner scanner = region.getScanner(scan);
    Cache<ImmutableBytesPtr, PMetaDataEntity> metaDataCache = GlobalCache.getInstance(this.env).getMetaDataCache();
    List<PFunction> functions = new ArrayList<PFunction>();
    PFunction function = null;
    try {
        for (int i = 0; i < keys.size(); i++) {
            function = null;
            function = getFunction(scanner, isReplace, clientTimeStamp, deleteMutationsForReplace);
            if (function == null) {
                return null;
            }
            byte[] functionKey = SchemaUtil.getFunctionKey(function.getTenantId() == null ? ByteUtil.EMPTY_BYTE_ARRAY : function.getTenantId().getBytes(), Bytes.toBytes(function.getFunctionName()));
            metaDataCache.put(new FunctionBytesPtr(functionKey), function);
            functions.add(function);
        }
        return functions;
    } finally {
        scanner.close();
    }
}

Example 49 with RegionScanner

use of org.apache.hadoop.hbase.regionserver.RegionScanner in project phoenix by apache.

the class MetaDataEndpointImpl method doDropSchema.

private MetaDataMutationResult doDropSchema(long clientTimeStamp, String schemaName, byte[] key, List<Mutation> schemaMutations, List<ImmutableBytesPtr> invalidateList) throws IOException, SQLException {
    PSchema schema = loadSchema(env, key, new ImmutableBytesPtr(key), clientTimeStamp, clientTimeStamp);
    boolean areTablesExists = false;
    if (schema == null) {
        return new MetaDataMutationResult(MutationCode.SCHEMA_NOT_FOUND, EnvironmentEdgeManager.currentTimeMillis(), null);
    }
    if (schema.getTimeStamp() < clientTimeStamp) {
        Region region = env.getRegion();
        Scan scan = MetaDataUtil.newTableRowsScan(SchemaUtil.getKeyForSchema(null, schemaName), MIN_TABLE_TIMESTAMP, clientTimeStamp);
        List<Cell> results = Lists.newArrayList();
        try (RegionScanner scanner = region.getScanner(scan)) {
            scanner.next(results);
            if (results.isEmpty()) {
                // Should not be possible
                return new MetaDataMutationResult(MutationCode.SCHEMA_NOT_FOUND, EnvironmentEdgeManager.currentTimeMillis(), null);
            }
            do {
                Cell kv = results.get(0);
                if (Bytes.compareTo(kv.getRowArray(), kv.getRowOffset(), kv.getRowLength(), key, 0, key.length) != 0) {
                    areTablesExists = true;
                    break;
                }
                results.clear();
                scanner.next(results);
            } while (!results.isEmpty());
        }
        if (areTablesExists) {
            return new MetaDataMutationResult(MutationCode.TABLES_EXIST_ON_SCHEMA, schema, EnvironmentEdgeManager.currentTimeMillis());
        }
        invalidateList.add(new ImmutableBytesPtr(key));
        return new MetaDataMutationResult(MutationCode.SCHEMA_ALREADY_EXISTS, schema, EnvironmentEdgeManager.currentTimeMillis());
    }
    return new MetaDataMutationResult(MutationCode.SCHEMA_NOT_FOUND, EnvironmentEdgeManager.currentTimeMillis(), null);
}

Example 50 with RegionScanner

use of org.apache.hadoop.hbase.regionserver.RegionScanner in project phoenix by apache.

the class MetaDataEndpointImpl method buildDeletedFunction.

private PFunction buildDeletedFunction(byte[] key, ImmutableBytesPtr cacheKey, Region region, long clientTimeStamp) throws IOException {
    if (clientTimeStamp == HConstants.LATEST_TIMESTAMP) {
        return null;
    }
    Scan scan = MetaDataUtil.newTableRowsScan(key, clientTimeStamp, HConstants.LATEST_TIMESTAMP);
    scan.setFilter(new FirstKeyOnlyFilter());
    scan.setRaw(true);
    List<Cell> results = Lists.<Cell>newArrayList();
    try (RegionScanner scanner = region.getScanner(scan)) {
        scanner.next(results);
    }
    // HBase ignores the time range on a raw scan (HBASE-7362)
    if (!results.isEmpty() && results.get(0).getTimestamp() > clientTimeStamp) {
        Cell kv = results.get(0);
        if (kv.getTypeByte() == Type.Delete.getCode()) {
            Cache<ImmutableBytesPtr, PMetaDataEntity> metaDataCache = GlobalCache.getInstance(this.env).getMetaDataCache();
            PFunction function = newDeletedFunctionMarker(kv.getTimestamp());
            metaDataCache.put(cacheKey, function);
            return function;
        }
    }
    return null;
}