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.beam.runners.dataflow.worker.windmill;
  
  import java.io.IOException;
  import java.util.Set;
  import org.apache.beam.runners.dataflow.worker.windmill.client.WindmillStream.CommitWorkStream;
  import org.apache.beam.runners.dataflow.worker.windmill.client.WindmillStream.GetDataStream;
  import org.apache.beam.runners.dataflow.worker.windmill.client.WindmillStream.GetWorkStream;
  import org.apache.beam.runners.dataflow.worker.windmill.work.WorkItemReceiver;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableSet;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.net.HostAndPort;
  
  /**
   * Implementation of a WindmillServerStub which communicates with a Windmill appliance server.
   *
   * @implNote This is only for use in Streaming Appliance. Please do not change the name or path of
   *     this class as this will break JNI.
   */
  @SuppressWarnings({
    "nullness" // TODO(https://github.com/apache/beam/issues/20497)
  })
  public class WindmillServerBase extends WindmillServerStub {
  
    /** Pointer to the underlying native windmill client object. */
    private final long nativePointer;
  
    protected WindmillServerBase(String host) {
      this.nativePointer = create(host);
    }
  
    @Override
    protected void finalize() {
      destroy(nativePointer);
    }
  
    @Override
    public void setWindmillServiceEndpoints(Set<HostAndPort> endpoints) {
      // This class is used for windmill appliance and local runner tests.
    }
  
    @Override
    public ImmutableSet<HostAndPort> getWindmillServiceEndpoints() {
      return ImmutableSet.of();
    }
  
    @Override
    public Windmill.GetWorkResponse getWork(Windmill.GetWorkRequest workRequest) {
      try {
        byte[] requestBytes = workRequest.toByteArray();
        return Windmill.GetWorkResponse.newBuilder()
            .mergeFrom(getWorkImpl(nativePointer, requestBytes, requestBytes.length))
            .build();
      } catch (IOException e) {
        throw new RuntimeException("Proto deserialization failed: " + e);
      }
    }
  
    @Override
    public Windmill.GetDataResponse getData(Windmill.GetDataRequest dataRequest) {
      try {
        byte[] requestBytes = dataRequest.toByteArray();
        return Windmill.GetDataResponse.newBuilder()
            .mergeFrom(getDataImpl(nativePointer, requestBytes, requestBytes.length))
            .build();
      } catch (IOException e) {
        throw new RuntimeException("Proto deserialization failed: " + e);
      }
    }
  
    @Override
    public Windmill.CommitWorkResponse commitWork(Windmill.CommitWorkRequest commitRequest) {
      try {
        byte[] requestBytes = commitRequest.toByteArray();
        return Windmill.CommitWorkResponse.newBuilder()
            .mergeFrom(commitWorkImpl(nativePointer, requestBytes, requestBytes.length))
            .build();
      } catch (IOException e) {
        throw new RuntimeException("Proto deserialization failed: " + e);
      }
    }
  
    @Override
    public Windmill.GetConfigResponse getConfig(Windmill.GetConfigRequest configRequest) {
      try {
        byte[] requestBytes = configRequest.toByteArray();
        return Windmill.GetConfigResponse.newBuilder()
            .mergeFrom(getConfigImpl(nativePointer, requestBytes, requestBytes.length))
            .build();
      } catch (IOException e) {
        throw new RuntimeException("Proto deserialization failed: " + e);
      }
    }
  
    @Override
    public Windmill.ReportStatsResponse reportStats(Windmill.ReportStatsRequest statsRequest) {
      try {
        byte[] requestBytes = statsRequest.toByteArray();
        return Windmill.ReportStatsResponse.newBuilder()
            .mergeFrom(reportStatsImpl(nativePointer, requestBytes, requestBytes.length))
            .build();
      } catch (IOException e) {
        throw new RuntimeException("Proto deserialization failed: " + e);
      }
    }
  
    @Override
    public GetWorkStream getWorkStream(Windmill.GetWorkRequest request, WorkItemReceiver receiver) {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public GetDataStream getDataStream() {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public CommitWorkStream commitWorkStream() {
      throw new UnsupportedOperationException();
    }
  
    /** Native methods for interacting with the underlying native windmill client code. */
    private native long create(String host);
  
    private native void destroy(long nativePointer);
  
    private native byte[] getWorkImpl(long nativePointer, byte[] workRequest, int requestSize);
  
    private native byte[] getDataImpl(long nativePointer, byte[] dataRequest, int requestSize);
  
    private native byte[] commitWorkImpl(long nativePointer, byte[] commitRequest, int requestSize);
  
    private native byte[] getConfigImpl(long nativePointer, byte[] configRequest, int requestSize);
  
    private native byte[] reportStatsImpl(
        long nativePointer, byte[] reportStatsRequest, int requestSize);
  }
  