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/*
* Copyright 2010-2015 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.s3.model;
import java.util.Arrays;
import java.util.List;
import java.util.regex.Pattern;
import com.amazonaws.regions.RegionUtils;
import com.amazonaws.services.s3.internal.Constants;
/**
* Specifies constants that define Amazon S3 Regions.
*
* Amazon S3 Regions allow the user to choose the geographical region where Amazon S3
* will store the buckets the user creates. Choose a Amazon S3 Region to optimize
* latency, minimize costs, or address regulatory requirements.
*
*
* Objects stored in a Amazon S3 Region never leave that region unless explicitly
* transferred to another region.
*
*/
public enum Region {
/**
* The US Standard Amazon S3 Region. This region
* uses Amazon S3 servers located in the United
* States.
*
* This is the default Amazon S3 Region. All requests sent to
* s3.amazonaws.com go
* to this region unless a location constraint is specified when creating a bucket.
* The US Standard Region automatically places
* data in either Amazon's east or west coast data centers depending on
* which one provides the lowest latency. The US Standard Region
* provides eventual consistency for all requests.
*
*/
US_Standard((String[])null),
/**
* The US-West (Northern California) Amazon S3 Region. This region uses Amazon S3
* servers located in Northern California.
*
* When using buckets in this region, set the client
* endpoint to s3-us-west-1.amazonaws.com on all requests to these
* buckets to reduce any latency experienced after the first
* hour of creating a bucket in this region.
*
*
* In Amazon S3, the US-West (Northern California) Region provides
* read-after-write consistency for PUTS of new objects in Amazon
* S3 buckets and eventual consistency for overwrite PUTS and DELETES.
*
*/
US_West("us-west-1"),
/**
* The US-West-2 (Oregon) Region. This region uses Amazon S3 servers located
* in Oregon.
*
* When using buckets in this region, set the client
* endpoint to s3-us-west-2.amazonaws.com on all requests to these buckets
* to reduce any latency experienced after the first hour of
* creating a bucket in this region.
*
*/
US_West_2("us-west-2"),
/**
* The US GovCloud Region. This region uses Amazon S3 servers located in the Northwestern
* region of the United States.
*/
US_GovCloud("s3-us-gov-west-1"),
/**
* The EU (Ireland) Amazon S3 Region. This region uses Amazon S3 servers located
* in Ireland.
*
* In Amazon S3, the EU (Ireland) Region provides read-after-write
* consistency for PUTS of new objects in Amazon S3 buckets and eventual
* consistency for overwrite PUTS and DELETES.
*
*/
EU_Ireland("eu-west-1","EU"),
/**
* The EU (Frankfurt) Amazon S3 Region. This region uses Amazon S3 servers located
* in Frankfurt.
*
* Note that to access S3 buckets in Frankfurt you must explicitly set the
* region on the AWS S3 Client you are working with.
*
* In Amazon S3, the EU (Franfkurt) Region provides read-after-write
* consistency for PUTS of new objects in Amazon S3 buckets and eventual
* consistency for overwrite PUTS and DELETES.
*
*/
EU_Frankfurt("eu-central-1"),
/**
* The Asia Pacific (Singapore) Region. This region uses Amazon S3 servers located
* in Singapore.
*
* When using buckets in this region, set the client
* endpoint to s3-ap-southeast-1.amazonaws.com on all requests to these buckets
* to reduce any latency experienced after the first hour of
* creating a bucket in this region.
*
*/
AP_Singapore("ap-southeast-1"),
/**
* The Asia Pacific (Sydney) Region. This region uses Amazon S3 servers
* located in Sydney, Australia.
*
* When using buckets in this region, set the client endpoint to
* s3-ap-southeast-2.amazonaws.com on all requests to these buckets
* to reduce any latency experienced after the first hour of creating a
* bucket in this region.
*
*/
AP_Sydney("ap-southeast-2"),
/**
* The Asia Pacific (Tokyo) Region. This region uses Amazon S3 servers
* located in Tokyo.
*
* When using buckets in this region, set the client endpoint to
* s3-ap-northeast-1.amazonaws.com on all requests to these
* buckets to reduce any latency experienced after the first hour of
* creating a bucket in this region.
*
*/
AP_Tokyo("ap-northeast-1"),
/**
* The South America (Sao Paulo) Region. This region uses Amazon S3 servers
* located in Sao Paulo.
*
* When using buckets in this region, set the client endpoint to
* s3-sa-east-1.amazonaws.com on all requests to these buckets
* to reduce any latency experienced after the first hour of creating a
* bucket in this region.
*
*/
SA_SaoPaulo("sa-east-1"),
/**
* The China (Beijing) Region. This region uses Amazon S3 servers
* located in Beijing.
*
* When using buckets in this region, you must set the client endpoint to
* s3.cn-north-1.amazonaws.com.cn.
*/
CN_Beijing("cn-north-1");
/**
* Used to extract the S3 regional id from an S3 end point.
* Note this pattern will not match the S3 US standard endpoint by intent.
*/
public static final Pattern S3_REGIONAL_ENDPOINT_PATTERN = Pattern.compile("s3-([^.]+)\\.amazonaws\\.com");
/** The list of ID's representing each region. */
private final List regionIds;
/**
* Constructs a new region with the specified region ID's.
*
* @param regionIds
* The list of ID's representing the S3 region.
*/
private Region(String... regionIds) {
this.regionIds = regionIds != null ? Arrays.asList(regionIds) : null;
}
/*
* (non-Javadoc)
*
* @see java.lang.Enum#toString()
*/
@Override
public String toString() {
return getFirstRegionId0();
}
/**
* Returns the first region id or null for {@link #US_Standard}.
*/
public String getFirstRegionId() {
return getFirstRegionId0();
}
private String getFirstRegionId0() {
return this.regionIds == null || regionIds.size() == 0
? null : this.regionIds.get(0);
}
/**
* Returns the Amazon S3 Region enumeration value representing the specified Amazon
* S3 Region ID string. If specified string doesn't map to a known Amazon S3
* Region, then an IllegalArgumentException is thrown.
*
* @param s3RegionId
* The Amazon S3 region ID string.
*
* @return The Amazon S3 Region enumeration value representing the specified Amazon
* S3 Region ID.
*
* @throws IllegalArgumentException
* If the specified value does not map to one of the known
* Amazon S3 regions.
*/
public static Region fromValue(final String s3RegionId) throws IllegalArgumentException
{
if (s3RegionId == null || s3RegionId.equals("US"))
return Region.US_Standard;
for (Region region : Region.values()) {
List regionIds = region.regionIds;
if (regionIds != null && regionIds.contains(s3RegionId))
return region;
}
throw new IllegalArgumentException(
"Cannot create enum from " + s3RegionId + " value!");
}
/**
* Returns the respective AWS region.
*/
public com.amazonaws.regions.Region toAWSRegion() {
String s3regionId = getFirstRegionId();
if ( s3regionId == null ) { // US Standard
return RegionUtils.getRegionByEndpoint(Constants.S3_HOSTNAME);
} else {
return RegionUtils.getRegion(s3regionId);
}
}
}