com.google.firebase.internal.CallableOperation Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of firebase-admin Show documentation

This is the official Firebase Admin Java SDK. Build extraordinary native JVM apps in minutes with Firebase. The Firebase platform can power your app’s backend, user authentication, static hosting, and more.

There is a newer version: 9.3.0

Show newest version

/*
 * Copyright 2017 Google Inc.
 *
 * Licensed 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 com.google.firebase.internal;

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.api.core.ApiFuture;
import com.google.firebase.FirebaseApp;
import com.google.firebase.ImplFirebaseTrampolines;
import java.util.concurrent.Callable;

/**
 * An operation that can be invoked synchronously or asynchronously. Subclasses can specify
 * the return type and a specific exception type to be thrown.
 */
public abstract class CallableOperation implements Callable {

  protected abstract T execute() throws V;

  @Override
  public final T call() throws V {
    return execute();
  }

  /**
   * Run this operation asynchronously on the main thread pool of the specified {@link FirebaseApp}.
   *
   * @param app A non-null {@link FirebaseApp}.
   * @return An {@code ApiFuture}.
   */
  public final ApiFuture callAsync(@NonNull FirebaseApp app) {
    checkNotNull(app);
    return ImplFirebaseTrampolines.submitCallable(app, this);
  }
}