Examples with AggregateResponse org.apache.hadoop.hbase.shaded.protobuf.generated.AggregateProtos.AggregateResponse used on opensource projects

Example 6 with AggregateResponse

use of org.apache.hadoop.hbase.shaded.protobuf.generated.AggregateProtos.AggregateResponse in project hbase by apache.

the class AggregationClient method getStdArgs.

/**
 * It computes a global standard deviation for a given column and its value.
 * Standard deviation is square root of (average of squares -
 * average*average). From individual regions, it obtains sum, square sum and
 * number of rows. With these, the above values are computed to get the global
 * std.
 * @param table table to scan.
 * @param scan the HBase scan object to use to read data from HBase
 * @return standard deviations
 * @throws Throwable The caller is supposed to handle the exception as they are thrown
 *           & propagated to it.
 */
private <R, S, P extends Message, Q extends Message, T extends Message> Pair<List<S>, Long> getStdArgs(final Table table, final ColumnInterpreter<R, S, P, Q, T> ci, final Scan scan) throws Throwable {
    final AggregateRequest requestArg = validateArgAndGetPB(scan, ci, false);
    class StdCallback implements Batch.Callback<Pair<List<S>, Long>> {

        long rowCountVal = 0L;

        S sumVal = null, sumSqVal = null;

        public synchronized Pair<List<S>, Long> getStdParams() {
            List<S> l = new ArrayList<>(2);
            l.add(sumVal);
            l.add(sumSqVal);
            Pair<List<S>, Long> p = new Pair<>(l, rowCountVal);
            return p;
        }

        @Override
        public synchronized void update(byte[] region, byte[] row, Pair<List<S>, Long> result) {
            if (result.getFirst().size() > 0) {
                sumVal = ci.add(sumVal, result.getFirst().get(0));
                sumSqVal = ci.add(sumSqVal, result.getFirst().get(1));
                rowCountVal += result.getSecond();
            }
        }
    }
    StdCallback stdCallback = new StdCallback();
    table.coprocessorService(AggregateService.class, scan.getStartRow(), scan.getStopRow(), new Batch.Call<AggregateService, Pair<List<S>, Long>>() {

        @Override
        public Pair<List<S>, Long> call(AggregateService instance) throws IOException {
            RpcController controller = new AggregationClientRpcController();
            CoprocessorRpcUtils.BlockingRpcCallback<AggregateResponse> rpcCallback = new CoprocessorRpcUtils.BlockingRpcCallback<>();
            instance.getStd(controller, requestArg, rpcCallback);
            AggregateResponse response = rpcCallback.get();
            if (controller.failed()) {
                throw new IOException(controller.errorText());
            }
            Pair<List<S>, Long> pair = new Pair<>(new ArrayList<>(), 0L);
            if (response.getFirstPartCount() == 0) {
                return pair;
            }
            List<S> list = new ArrayList<>();
            for (int i = 0; i < response.getFirstPartCount(); i++) {
                ByteString b = response.getFirstPart(i);
                T t = getParsedGenericInstance(ci.getClass(), 4, b);
                S s = ci.getPromotedValueFromProto(t);
                list.add(s);
            }
            pair.setFirst(list);
            ByteBuffer bb = ByteBuffer.allocate(8).put(getBytesFromResponse(response.getSecondPart()));
            bb.rewind();
            pair.setSecond(bb.getLong());
            return pair;
        }
    }, stdCallback);
    return stdCallback.getStdParams();
}

Example 7 with AggregateResponse

use of org.apache.hadoop.hbase.shaded.protobuf.generated.AggregateProtos.AggregateResponse in project hbase by apache.

the class AggregationClient method rowCount.

/**
 * It gives the row count, by summing up the individual results obtained from
 * regions. In case the qualifier is null, FirstKeyValueFilter is used to
 * optimised the operation. In case qualifier is provided, I can't use the
 * filter as it may set the flag to skip to next row, but the value read is
 * not of the given filter: in this case, this particular row will not be
 * counted ==> an error.
 * @param table table to scan.
 * @param ci the user's ColumnInterpreter implementation
 * @param scan the HBase scan object to use to read data from HBase
 * @return <R, S>
 * @throws Throwable The caller is supposed to handle the exception as they are thrown
 *           & propagated to it.
 */
public <R, S, P extends Message, Q extends Message, T extends Message> long rowCount(final Table table, final ColumnInterpreter<R, S, P, Q, T> ci, final Scan scan) throws Throwable {
    final AggregateRequest requestArg = validateArgAndGetPB(scan, ci, true);
    class RowNumCallback implements Batch.Callback<Long> {

        private final AtomicLong rowCountL = new AtomicLong(0);

        public long getRowNumCount() {
            return rowCountL.get();
        }

        @Override
        public void update(byte[] region, byte[] row, Long result) {
            rowCountL.addAndGet(result.longValue());
        }
    }
    RowNumCallback rowNum = new RowNumCallback();
    table.coprocessorService(AggregateService.class, scan.getStartRow(), scan.getStopRow(), new Batch.Call<AggregateService, Long>() {

        @Override
        public Long call(AggregateService instance) throws IOException {
            RpcController controller = new AggregationClientRpcController();
            CoprocessorRpcUtils.BlockingRpcCallback<AggregateResponse> rpcCallback = new CoprocessorRpcUtils.BlockingRpcCallback<>();
            instance.getRowNum(controller, requestArg, rpcCallback);
            AggregateResponse response = rpcCallback.get();
            if (controller.failed()) {
                throw new IOException(controller.errorText());
            }
            byte[] bytes = getBytesFromResponse(response.getFirstPart(0));
            ByteBuffer bb = ByteBuffer.allocate(8).put(bytes);
            bb.rewind();
            return bb.getLong();
        }
    }, rowNum);
    return rowNum.getRowNumCount();
}

Example 8 with AggregateResponse

use of org.apache.hadoop.hbase.shaded.protobuf.generated.AggregateProtos.AggregateResponse in project hbase by apache.

the class AsyncAggregationClient method min.

public static <R, S, P extends Message, Q extends Message, T extends Message> CompletableFuture<R> min(AsyncTable<?> table, ColumnInterpreter<R, S, P, Q, T> ci, Scan scan) {
    CompletableFuture<R> future = new CompletableFuture<>();
    AggregateRequest req;
    try {
        req = validateArgAndGetPB(scan, ci, false);
    } catch (IOException e) {
        future.completeExceptionally(e);
        return future;
    }
    AbstractAggregationCallback<R> callback = new AbstractAggregationCallback<R>(future) {

        private R min;

        @Override
        protected void aggregate(RegionInfo region, AggregateResponse resp) throws IOException {
            if (resp.getFirstPartCount() > 0) {
                R result = getCellValueFromProto(ci, resp, 0);
                if (min == null || (result != null && ci.compare(min, result) > 0)) {
                    min = result;
                }
            }
        }

        @Override
        protected R getFinalResult() {
            return min;
        }
    };
    table.<AggregateService, AggregateResponse>coprocessorService(AggregateService::newStub, (stub, controller, rpcCallback) -> stub.getMin(controller, req, rpcCallback), callback).fromRow(nullToEmpty(scan.getStartRow()), scan.includeStartRow()).toRow(nullToEmpty(scan.getStopRow()), scan.includeStopRow()).execute();
    return future;
}

Example 9 with AggregateResponse

use of org.apache.hadoop.hbase.shaded.protobuf.generated.AggregateProtos.AggregateResponse in project hbase by apache.

the class AsyncAggregationClient method sumByRegion.

// the map key is the startRow of the region
private static <R, S, P extends Message, Q extends Message, T extends Message> CompletableFuture<NavigableMap<byte[], S>> sumByRegion(AsyncTable<?> table, ColumnInterpreter<R, S, P, Q, T> ci, Scan scan) {
    CompletableFuture<NavigableMap<byte[], S>> future = new CompletableFuture<NavigableMap<byte[], S>>();
    AggregateRequest req;
    try {
        req = validateArgAndGetPB(scan, ci, false);
    } catch (IOException e) {
        future.completeExceptionally(e);
        return future;
    }
    int firstPartIndex = scan.getFamilyMap().get(scan.getFamilies()[0]).size() - 1;
    AbstractAggregationCallback<NavigableMap<byte[], S>> callback = new AbstractAggregationCallback<NavigableMap<byte[], S>>(future) {

        private final NavigableMap<byte[], S> map = new TreeMap<>(Bytes.BYTES_COMPARATOR);

        @Override
        protected void aggregate(RegionInfo region, AggregateResponse resp) throws IOException {
            if (resp.getFirstPartCount() > 0) {
                map.put(region.getStartKey(), getPromotedValueFromProto(ci, resp, firstPartIndex));
            }
        }

        @Override
        protected NavigableMap<byte[], S> getFinalResult() {
            return map;
        }
    };
    table.<AggregateService, AggregateResponse>coprocessorService(AggregateService::newStub, (stub, controller, rpcCallback) -> stub.getMedian(controller, req, rpcCallback), callback).fromRow(nullToEmpty(scan.getStartRow()), scan.includeStartRow()).toRow(nullToEmpty(scan.getStopRow()), scan.includeStopRow()).execute();
    return future;
}

Example 10 with AggregateResponse

use of org.apache.hadoop.hbase.shaded.protobuf.generated.AggregateProtos.AggregateResponse in project hbase by apache.

the class AsyncAggregationClient method max.

public static <R, S, P extends Message, Q extends Message, T extends Message> CompletableFuture<R> max(AsyncTable<?> table, ColumnInterpreter<R, S, P, Q, T> ci, Scan scan) {
    CompletableFuture<R> future = new CompletableFuture<>();
    AggregateRequest req;
    try {
        req = validateArgAndGetPB(scan, ci, false);
    } catch (IOException e) {
        future.completeExceptionally(e);
        return future;
    }
    AbstractAggregationCallback<R> callback = new AbstractAggregationCallback<R>(future) {

        private R max;

        @Override
        protected void aggregate(RegionInfo region, AggregateResponse resp) throws IOException {
            if (resp.getFirstPartCount() > 0) {
                R result = getCellValueFromProto(ci, resp, 0);
                if (max == null || (result != null && ci.compare(max, result) < 0)) {
                    max = result;
                }
            }
        }

        @Override
        protected R getFinalResult() {
            return max;
        }
    };
    table.<AggregateService, AggregateResponse>coprocessorService(AggregateService::newStub, (stub, controller, rpcCallback) -> stub.getMax(controller, req, rpcCallback), callback).fromRow(nullToEmpty(scan.getStartRow()), scan.includeStartRow()).toRow(nullToEmpty(scan.getStopRow()), scan.includeStopRow()).execute();
    return future;
}