| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.beam.examples.complete.game.injector; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import com.google.api.client.googleapis.auth.oauth2.GoogleCredential; |
| import com.google.api.client.googleapis.json.GoogleJsonResponseException; |
| import com.google.api.client.googleapis.util.Utils; |
| import com.google.api.client.http.HttpRequestInitializer; |
| import com.google.api.client.http.HttpStatusCodes; |
| import com.google.api.client.http.HttpTransport; |
| import com.google.api.client.json.JsonFactory; |
| import com.google.api.services.pubsub.Pubsub; |
| import com.google.api.services.pubsub.PubsubScopes; |
| import com.google.api.services.pubsub.model.Topic; |
| import java.io.IOException; |
| |
| class InjectorUtils { |
| |
| private static final String APP_NAME = "injector"; |
| |
| /** |
| * Builds a new Pubsub client and returns it. |
| */ |
| public static Pubsub getClient(final HttpTransport httpTransport, |
| final JsonFactory jsonFactory) |
| throws IOException { |
| checkNotNull(httpTransport); |
| checkNotNull(jsonFactory); |
| GoogleCredential credential = |
| GoogleCredential.getApplicationDefault(httpTransport, jsonFactory); |
| if (credential.createScopedRequired()) { |
| credential = credential.createScoped(PubsubScopes.all()); |
| } |
| if (credential.getClientAuthentication() != null) { |
| System.out.println("\n***Warning! You are not using service account credentials to " |
| + "authenticate.\nYou need to use service account credentials for this example," |
| + "\nsince user-level credentials do not have enough pubsub quota,\nand so you will run " |
| + "out of PubSub quota very quickly.\nSee " |
| + "https://developers.google.com/identity/protocols/application-default-credentials."); |
| System.exit(1); |
| } |
| HttpRequestInitializer initializer = |
| new RetryHttpInitializerWrapper(credential); |
| return new Pubsub.Builder(httpTransport, jsonFactory, initializer) |
| .setApplicationName(APP_NAME) |
| .build(); |
| } |
| |
| /** |
| * Builds a new Pubsub client with default HttpTransport and |
| * JsonFactory and returns it. |
| */ |
| public static Pubsub getClient() throws IOException { |
| return getClient(Utils.getDefaultTransport(), |
| Utils.getDefaultJsonFactory()); |
| } |
| |
| |
| /** |
| * Returns the fully qualified topic name for Pub/Sub. |
| */ |
| public static String getFullyQualifiedTopicName( |
| final String project, final String topic) { |
| return String.format("projects/%s/topics/%s", project, topic); |
| } |
| |
| /** |
| * Create a topic if it doesn't exist. |
| */ |
| public static void createTopic(Pubsub client, String fullTopicName) |
| throws IOException { |
| try { |
| client.projects().topics().get(fullTopicName).execute(); |
| } catch (GoogleJsonResponseException e) { |
| if (e.getStatusCode() == HttpStatusCodes.STATUS_CODE_NOT_FOUND) { |
| Topic topic = client.projects().topics() |
| .create(fullTopicName, new Topic()) |
| .execute(); |
| System.out.printf("Topic %s was created.\n", topic.getName()); |
| } |
| } |
| } |
| } |