com.google.firebase.internal.ApiClientUtils 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.

The newest version!

/*
 * Copyright 2019 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 com.google.api.client.googleapis.util.Utils;
import com.google.api.client.http.HttpRequestFactory;
import com.google.api.client.http.HttpResponse;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.common.collect.ImmutableList;
import com.google.firebase.FirebaseApp;

import java.io.IOException;

/**
 * A set of shared utilities for using the Google API client.
 */
public class ApiClientUtils {

  static final RetryConfig DEFAULT_RETRY_CONFIG = RetryConfig.builder()
      .setMaxRetries(4)
      .setRetryStatusCodes(ImmutableList.of(503))
      .setMaxIntervalMillis(60 * 1000)
      .build();

  private ApiClientUtils() { }

  /**
   * Creates a new {@code HttpRequestFactory} which provides authorization (OAuth2), timeouts and
   * automatic retries.
   *
   * @param app {@link FirebaseApp} from which to obtain authorization credentials.
   * @return A new {@code HttpRequestFactory} instance.
   */
  public static HttpRequestFactory newAuthorizedRequestFactory(FirebaseApp app) {
    return newAuthorizedRequestFactory(app, DEFAULT_RETRY_CONFIG);
  }

  /**
   * Creates a new {@code HttpRequestFactory} which provides authorization (OAuth2), timeouts and
   * automatic retries.
   *
   * @param app {@link FirebaseApp} from which to obtain authorization credentials.
   * @param retryConfig {@link RetryConfig} instance or null to disable retries.
   * @return A new {@code HttpRequestFactory} instance.
   */
  public static HttpRequestFactory newAuthorizedRequestFactory(
      FirebaseApp app, @Nullable RetryConfig retryConfig) {
    HttpTransport transport = app.getOptions().getHttpTransport();
    return transport.createRequestFactory(new FirebaseRequestInitializer(app, retryConfig));
  }

  public static HttpRequestFactory newUnauthorizedRequestFactory(FirebaseApp app) {
    HttpTransport transport = app.getOptions().getHttpTransport();
    return transport.createRequestFactory();
  }

  public static void disconnectQuietly(HttpResponse response) {
    if (response != null) {
      try {
        response.disconnect();
      } catch (IOException ignored) {
        // ignored
      }
    }
  }

  public static JsonFactory getDefaultJsonFactory() {
    // Force using the Jackson2 parser for this project for now. Eventually we should switch
    // to Gson, but there are some issues that's preventing this migration at the moment.
    // See https://github.com/googleapis/google-api-java-client/issues/1779 for details.
    return JacksonFactory.getDefaultInstance();
  }

  public static HttpTransport getDefaultTransport() {
    return new ApacheHttp2Transport();
  }
}