nl.topicus.jdbc.shaded.com.google.api.gax.rpc.OperationCallable Maven / Gradle / Ivy

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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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package nl.topicus.jdbc.shaded.com.google.api.gax.rpc;

import nl.topicus.jdbc.shaded.com.google.api.core.ApiFuture;
import nl.topicus.jdbc.shaded.com.google.api.core.BetaApi;
import nl.topicus.jdbc.shaded.com.google.api.gax.longrunning.OperationFuture;

/**
 * An OperationCallable is an immutable object which is capable of initiating RPC calls to
 * long-running API methods and returning an {@link OperationFuture} to manage the polling of the
 * Operation and getting the response.
 *
 * It is considered advanced usage for a user to create an OperationCallable themselves. This
 * class is intended to be created by a generated client class, and configured by instances of
 * OperationCallSettings.Builder which are exposed through the client settings class.
 */
@BetaApi("The surface for long-running operations is not stable yet and may change in the future.")
public abstract class OperationCallable {

  protected OperationCallable() {}

  /**
   * Initiates an operation asynchronously.
   *
   * @param request The request to initiate the operation.
   * @param context {@link ApiCallContext} to make the call with
   * @return {@link OperationFuture} for the call result
   */
  public abstract OperationFuture futureCall(
      RequestT request, ApiCallContext context);

  /**
   * Same as {@link #futureCall(Object, ApiCallContext)}, with a null context.
   *
   * @param request request
   * @return {@link ApiFuture} for the call result
   */
  public OperationFuture futureCall(RequestT request) {
    return futureCall(request, null);
  }

  /**
   * Perform a call synchronously.
   *
   * @param request The request to initiate the operation.
   * @param context {@link ApiCallContext} to make the call with
   * @return the call result
   * @throws ApiException if there is any bad status in the response.
   * @throws RuntimeException if there is any other exception unrelated to bad status.
   */
  public ResponseT call(RequestT request, ApiCallContext context) {
    return ApiExceptions.callAndTranslateApiException(futureCall(request, context));
  }

  /**
   * Same as {@link #call(Object, ApiCallContext)}, with a null context.
   *
   * @param request The request to initiate the operation.
   * @return the call result
   * @throws ApiException if there is any bad status in the response.
   * @throws RuntimeException if there is any other exception unrelated to bad status.
   */
  public ResponseT call(RequestT request) {
    return ApiExceptions.callAndTranslateApiException(futureCall(request));
  }

  /**
   * Creates a new {@link OperationFuture} to watch an operation that has been initiated previously.
   * Note: This is not type-safe at static time; the result type can only be checked once the
   * operation finishes.
   *
   * @param operationName The name of the operation to resume.
   * @param context {@link ApiCallContext} to make the call with
   * @return {@link OperationFuture} for the call result.
   */
  public abstract OperationFuture resumeFutureCall(
      String operationName, ApiCallContext context);

  /**
   * Creates a new {@link OperationFuture} to watch an operation that has been initiated previously.
   * Note: This is not type-safe at static time; the result type can only be checked once the
   * operation finishes.
   *
   * @param operationName The name of the operation to resume.
   * @return {@link OperationFuture} for the call result.
   */
  public OperationFuture resumeFutureCall(String operationName) {
    return resumeFutureCall(operationName, null);
  }

  /**
   * Sends a cancellation request to the server for the operation with name {@code operationName}.
   *
   * @param operationName The name of the operation to cancel.
   * @param context {@link ApiCallContext} to make the call with
   * @return the future which completes once the operation is canceled on the server side.
   */
  public abstract ApiFuture cancel(String operationName, ApiCallContext context);

  /**
   * Sends a cancellation request to the server for the operation with name {@code operationName}.
   *
   * @param operationName The name of the operation to cancel.
   * @return the future which completes once the operation is canceled on the server side.
   */
  public ApiFuture cancel(String operationName) {
    return cancel(operationName, null);
  }

  /**
   * Returns a new {@code OperationCallable} with an {@link ApiCallContext} that is used as a
   * default when none is supplied in individual calls.
   *
   * @param defaultCallContext the default {@link ApiCallContext}.
   */
  public OperationCallable withDefaultCallContext(
      final ApiCallContext defaultCallContext) {
    return new OperationCallable() {
      @Override
      public OperationFuture futureCall(
          RequestT request, ApiCallContext thisCallContext) {
        return OperationCallable.this.futureCall(
            request, defaultCallContext.merge(thisCallContext));
      }

      @Override
      public OperationFuture resumeFutureCall(
          String operationName, ApiCallContext thisCallContext) {
        return OperationCallable.this.resumeFutureCall(
            operationName, defaultCallContext.merge(thisCallContext));
      }

      @Override
      public ApiFuture cancel(String operationName, ApiCallContext thisCallContext) {
        return OperationCallable.this.cancel(
            operationName, defaultCallContext.merge(thisCallContext));
      }
    };
  }
}