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Google Api eXtensions for Java (gRPC)
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/*
 * Copyright 2017 Google LLC
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google LLC nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 */
package com.google.api.gax.grpc;

import com.google.api.gax.rpc.ApiCallContext;
import com.google.api.gax.rpc.ApiException;
import com.google.api.gax.rpc.BidiStreamingCallable;
import com.google.api.gax.rpc.ClientStream;
import com.google.api.gax.rpc.ClientStreamReadyObserver;
import com.google.api.gax.rpc.ResponseObserver;
import com.google.api.gax.rpc.StatusCode;
import java.util.Set;

/**
 * Transforms all {@code Throwable}s thrown during a call into an instance of {@link ApiException}.
 *
 * Package-private for internal use.
 */
final class GrpcExceptionBidiStreamingCallable
    extends BidiStreamingCallable {
  private final BidiStreamingCallable innerCallable;
  private final GrpcApiExceptionFactory exceptionFactory;

  GrpcExceptionBidiStreamingCallable(
      BidiStreamingCallable innerCallable,
      Set retryableCodes) {
    this.innerCallable = innerCallable;
    this.exceptionFactory = new GrpcApiExceptionFactory(retryableCodes);
  }

  @Override
  public ClientStream internalCall(
      final ResponseObserver responseObserver,
      ClientStreamReadyObserver onReady,
      ApiCallContext context) {
    return innerCallable.internalCall(
        new ExceptionResponseObserver<>(responseObserver, exceptionFactory), onReady, context);
  }
}