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package org.apache.thrift.async;

import java.util.concurrent.CompletableFuture;

/**
 * A simple adapter that bridges {@link AsyncMethodCallback} with {@link
 * CompletableFuture}-returning style clients. Compiler generated code will invoke this adapter to
 * implement {@code FutureClient}s.
 *
 * @param  return type (can be {@link Void}).
 */
public final class AsyncMethodFutureAdapter implements AsyncMethodCallback {

  private AsyncMethodFutureAdapter() {}

  public static  AsyncMethodFutureAdapter create() {
    return new AsyncMethodFutureAdapter<>();
  }

  private final CompletableFuture future = new CompletableFuture<>();

  public CompletableFuture getFuture() {
    return future;
  }

  @Override
  public void onComplete(T response) {
    future.complete(response);
  }

  @Override
  public void onError(Exception exception) {
    future.completeExceptionally(exception);
  }
}