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  * Copyright 2013-2015 Amazon Technologies, Inc.
  * 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:
 * 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.regions;
Enumeration of region names
public enum Regions {

The default region that new customers in the US are encouraged to use when using AWS services for the first time.
    public static final Regions DEFAULT_REGION = ;
    private final String name;
    private Regions(String name) {
        this. = name;

The name of this region, used in the regions.xml file to identify it.
    public String getName() {
        return ;

Returns a region enum corresponding to the given region name.

regionName The name of the region. Ex.: eu-west-1
Region enum representing the given region name.
    public static Regions fromName(String regionName) {
        for (Regions region : Regions.values()) {
            if (regionName.equals(region.getName())) {
                return region;
        throw new IllegalArgumentException("Cannot create enum from " + regionName + " value!");

Returns a Region object representing the region the application is running in, when running in EC2. If this method is called from a non-EC2 environment, it will return null.
    public static Region getCurrentRegion() {
        try {
            final String region = EC2MetadataUtils.getEC2InstanceRegion();
            if (region != null)
                return Region.getRegion(fromName(region));
        } catch (AmazonClientException e) {
                "Ignoring failure to retrieve the region: " + e.getMessage());
        return null;
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