/* * Copyright 2018 Google Inc. All Rights Reserved. * * 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.cloud.bigquery.connector.common; import com.google.api.gax.core.FixedCredentialsProvider; import com.google.auth.Credentials; import com.google.cloud.bigquery.storage.v1.BigQueryReadClient; import com.google.cloud.bigquery.storage.v1.BigQueryReadSettings; import javax.inject.Inject; import java.io.IOException; import java.io.Serializable; import java.io.UncheckedIOException; /** * Since Guice recommends to avoid injecting closeable resources (see * https://github.com/google/guice/wiki/Avoid-Injecting-Closable-Resources), this factory creates * short lived clients that can be closed independently. */ public class BigQueryReadClientFactory implements Serializable { private final Credentials credentials; // using the user agent as HeaderProvider is not serializable private final UserAgentHeaderProvider userAgentHeaderProvider; @Inject public BigQueryReadClientFactory(BigQueryCredentialsSupplier bigQueryCredentialsSupplier, UserAgentHeaderProvider userAgentHeaderProvider) { // using Guava's optional as it is serializable this.credentials = bigQueryCredentialsSupplier.getCredentials(); this.userAgentHeaderProvider = userAgentHeaderProvider; } BigQueryReadClient createBigQueryReadClient() { try { BigQueryReadSettings.Builder clientSettings = BigQueryReadSettings.newBuilder() .setTransportChannelProvider( BigQueryReadSettings.defaultGrpcTransportProviderBuilder() .setHeaderProvider(userAgentHeaderProvider) .build()) .setCredentialsProvider(FixedCredentialsProvider.create(credentials)); return BigQueryReadClient.create(clientSettings.build()); } catch (IOException e) { throw new UncheckedIOException("Error creating BigQueryStorageClient", e); } } }