content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.arrow.flight;
  
  import static com.google.common.collect.ImmutableList.toImmutableList;
  import static org.apache.arrow.flight.FlightTestUtil.LOCALHOST;
  import static org.apache.arrow.flight.Location.forGrpcInsecure;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.util.Arrays;
  import java.util.List;
  import java.util.stream.Stream;
  import org.apache.arrow.memory.BufferAllocator;
  import org.apache.arrow.memory.RootAllocator;
  import org.apache.arrow.vector.IntVector;
  import org.apache.arrow.vector.VectorSchemaRoot;
  import org.apache.arrow.vector.types.pojo.ArrowType;
  import org.apache.arrow.vector.types.pojo.Field;
  import org.apache.arrow.vector.types.pojo.FieldType;
  import org.apache.arrow.vector.types.pojo.Schema;
  import org.junit.jupiter.api.Test;
  
  public class TestLargeMessage {
    /** Make sure a Flight client accepts large message payloads by default. */
    @Test
    public void getLargeMessage() throws Exception {
      try (final BufferAllocator a = new RootAllocator(Long.MAX_VALUE);
          final Producer producer = new Producer(a);
          final FlightServer s =
              FlightServer.builder(a, forGrpcInsecure(LOCALHOST, 0), producer).build().start()) {
  
        try (FlightClient client = FlightClient.builder(a, s.getLocation()).build()) {
          try (FlightStream stream = client.getStream(new Ticket(new byte[] {}));
              VectorSchemaRoot root = stream.getRoot()) {
            while (stream.next()) {
              for (final Field field : root.getSchema().getFields()) {
                int value = 0;
                final IntVector iv = (IntVector) root.getVector(field.getName());
                for (int i = 0; i < root.getRowCount(); i++) {
                  assertEquals(value, iv.get(i));
                  value++;
                }
              }
            }
          }
        }
      }
    }
  
    /** Make sure a Flight server accepts large message payloads by default. */
    @Test
    public void putLargeMessage() throws Exception {
      try (final BufferAllocator a = new RootAllocator(Long.MAX_VALUE);
          final Producer producer = new Producer(a);
          final FlightServer s =
              FlightServer.builder(a, forGrpcInsecure(LOCALHOST, 0), producer).build().start()) {
        try (FlightClient client = FlightClient.builder(a, s.getLocation()).build();
            BufferAllocator testAllocator = a.newChildAllocator("testcase", 0, Long.MAX_VALUE);
            VectorSchemaRoot root = generateData(testAllocator)) {
          final FlightClient.ClientStreamListener listener =
              client.startPut(FlightDescriptor.path("hello"), root, new AsyncPutListener());
          listener.putNext();
          listener.completed();
          listener.getResult();
        }
      }
    }
  
    private static VectorSchemaRoot generateData(BufferAllocator allocator) {
      final int size = 128 * 1024;
      final List<String> fieldNames =
          Arrays.asList("c1", "c2", "c3", "c4", "c5", "c6", "c7", "c8", "c9", "c10");
      final Stream<Field> fields =
          fieldNames.stream()
              .map(
                  fieldName ->
                      new Field(fieldName, FieldType.nullable(new ArrowType.Int(32, true)), null));
      final Schema schema = new Schema(fields.collect(toImmutableList()), null);
  
      final VectorSchemaRoot root = VectorSchemaRoot.create(schema, allocator);
      root.allocateNew();
      for (final String fieldName : fieldNames) {
        final IntVector iv = (IntVector) root.getVector(fieldName);
        iv.setValueCount(size);
        for (int i = 0; i < size; i++) {
          iv.set(i, i);
        }
      }
      root.setRowCount(size);
      return root;
    }
  
    private static class Producer implements FlightProducer, AutoCloseable {
      private final BufferAllocator allocator;
  
      Producer(BufferAllocator allocator) {
        this.allocator = allocator;
      }
  
      @Override
      public void getStream(CallContext context, Ticket ticket, ServerStreamListener listener) {
        try (VectorSchemaRoot root = generateData(allocator)) {
          listener.start(root);
          listener.putNext();
          listener.completed();
        }
      }
  
      @Override
      public void listFlights(
          CallContext context, Criteria criteria, StreamListener<FlightInfo> listener) {}
  
      @Override
      public FlightInfo getFlightInfo(CallContext context, FlightDescriptor descriptor) {
        return null;
      }
  
      @Override
      public Runnable acceptPut(
          CallContext context, FlightStream flightStream, StreamListener<PutResult> ackStream) {
        return () -> {
          try (VectorSchemaRoot root = flightStream.getRoot()) {
            while (flightStream.next()) {
              ;
            }
          }
        };
      }
  
      @Override
      public void doAction(CallContext context, Action action, StreamListener<Result> listener) {
        listener.onCompleted();
      }
  
      @Override
      public void listActions(CallContext context, StreamListener<ActionType> listener) {}
  
      @Override
      public void close() throws Exception {
        allocator.close();
      }
    }
  }
  