com.amazonaws.services.dynamodbv2.endpointdiscovery.AmazonDynamoDBEndpointCache Maven / Gradle / Ivy
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The AWS Java SDK for Amazon DynamoDB module holds the client classes that are used for communicating with Amazon DynamoDB Service
/*
* Copyright 2016-2021 Amazon.com, Inc. or its affiliates. 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. A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.amazonaws.services.dynamodbv2.endpointdiscovery;
import com.amazonaws.endpointdiscovery.EndpointDiscoveryRefreshCache;
import com.amazonaws.endpointdiscovery.Constants;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDB;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.net.URI;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import javax.annotation.Generated;
@Generated("com.amazonaws:aws-java-sdk-code-generator")
public class AmazonDynamoDBEndpointCache extends EndpointDiscoveryRefreshCache {
private static final Log log = LogFactory.getLog(AmazonDynamoDBEndpointCache.class);
public AmazonDynamoDBEndpointCache(AmazonDynamoDB client) {
super(new AmazonDynamoDBEndpointCacheLoader(client));
}
@Override
public URI get(String key, boolean required, URI defaultEndpoint) {
URI endpoint = cache.get(key);
if (endpoint != null) {
return endpoint;
} else {
if (!required) {
cache.put(key, defaultEndpoint);
}
return discoverEndpoint(key, required, defaultEndpoint);
}
}
@Override
public URI put(String key, Map endpointDetails, URI defaultEndpoint) {
URI discoveredEndpoint = URI.create(String.format("%s://%s", defaultEndpoint.getScheme(), endpointDetails.get(Constants.ENDPOINT)));
cache.put(key, discoveredEndpoint);
loadAndScheduleEvict(key, Long.valueOf(endpointDetails.get(Constants.CACHE_PERIOD)), TimeUnit.MINUTES);
log.debug("Cached new endpoint from service: " + discoveredEndpoint.toASCIIString());
log.debug("Cached endpoint TTL: " + endpointDetails.get(Constants.CACHE_PERIOD) + " minutes");
return discoveredEndpoint;
}
}