Java tutorial
/* * 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.sdk.io.aws.dynamodb; import static org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions.checkArgument; import com.amazonaws.auth.AWSCredentialsProvider; import com.amazonaws.auth.AWSStaticCredentialsProvider; import com.amazonaws.auth.BasicAWSCredentials; import com.amazonaws.client.builder.AwsClientBuilder; import com.amazonaws.regions.Regions; import com.amazonaws.services.cloudwatch.AmazonCloudWatch; import com.amazonaws.services.cloudwatch.AmazonCloudWatchClientBuilder; import com.amazonaws.services.dynamodbv2.AmazonDynamoDB; import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientBuilder; import javax.annotation.Nullable; /** Basic implementation of {@link AwsClientsProvider} used by default in {@link DynamoDBIO}. */ public class BasicDynamoDBProvider implements AwsClientsProvider { private final String accessKey; private final String secretKey; private final Regions region; @Nullable private final String serviceEndpoint; BasicDynamoDBProvider(String accessKey, String secretKey, Regions region, @Nullable String serviceEndpoint) { checkArgument(accessKey != null, "accessKey can not be null"); checkArgument(secretKey != null, "secretKey can not be null"); checkArgument(region != null, "region can not be null"); this.accessKey = accessKey; this.secretKey = secretKey; this.region = region; this.serviceEndpoint = serviceEndpoint; } private AWSCredentialsProvider getCredentialsProvider() { return new AWSStaticCredentialsProvider(new BasicAWSCredentials(accessKey, secretKey)); } @Override public AmazonCloudWatch getCloudWatchClient() { AmazonCloudWatchClientBuilder clientBuilder = AmazonCloudWatchClientBuilder.standard() .withCredentials(getCredentialsProvider()); if (serviceEndpoint == null) { clientBuilder.withRegion(region); } else { clientBuilder.withEndpointConfiguration( new AwsClientBuilder.EndpointConfiguration(serviceEndpoint, region.getName())); } return clientBuilder.build(); } @Override public AmazonDynamoDB createDynamoDB() { return AmazonDynamoDBClientBuilder.standard().withCredentials(getCredentialsProvider()).withRegion(region) .build(); } }