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DynamoDbDataContextFactory.java
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DynamoDbDataContextFactory.java
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/**
* 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.metamodel.dynamodb;
import org.apache.metamodel.DataContext;
import org.apache.metamodel.factory.AbstractDataContextFactory;
import org.apache.metamodel.factory.DataContextFactory;
import org.apache.metamodel.factory.DataContextProperties;
import org.apache.metamodel.factory.ResourceFactoryRegistry;
import org.apache.metamodel.util.SimpleTableDef;
import com.amazonaws.auth.AWSCredentialsProvider;
import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDB;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientBuilder;
/**
* {@link DataContextFactory} for DynamoDB
*/
public class DynamoDbDataContextFactory extends AbstractDataContextFactory {
@Override
protected String getType() {
return "dynamodb";
}
@Override
public DataContext create(DataContextProperties properties, ResourceFactoryRegistry resourceFactoryRegistry) {
final AmazonDynamoDBClientBuilder clientBuilder =
AmazonDynamoDBClientBuilder.standard().withCredentials(getCredentials(properties));
final Object region = properties.toMap().get("region");
if (region instanceof String) {
clientBuilder.setRegion((String) region);
}
final AmazonDynamoDB client = clientBuilder.build();
final SimpleTableDef[] tableDefs = properties.getTableDefs();
return new DynamoDbDataContext(client, tableDefs);
}
private AWSCredentialsProvider getCredentials(DataContextProperties properties) {
if (properties.getUsername() != null) {
final BasicAWSCredentials credentials =
new BasicAWSCredentials(properties.getUsername(), properties.getPassword());
return new AWSStaticCredentialsProvider(credentials);
} else {
return DefaultAWSCredentialsProviderChain.getInstance();
}
}
}