001/* 002 * (C) Copyright 2018 Nuxeo (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Florent Guillaume 018 */ 019package org.nuxeo.runtime.aws; 020 021import static org.apache.commons.lang3.StringUtils.defaultString; 022 023import org.nuxeo.runtime.api.Framework; 024 025import com.amazonaws.SdkClientException; 026import com.amazonaws.regions.AwsRegionProvider; 027import com.amazonaws.regions.DefaultAwsRegionProviderChain; 028 029/** 030 * AWS Region Provider that uses Nuxeo configuration, or uses the default AWS chain as a fallback. 031 * 032 * @since 10.3 033 */ 034public class NuxeoAWSRegionProvider extends AwsRegionProvider { 035 036 protected static final AwsRegionProvider INSTANCE = new NuxeoAWSRegionProvider(); 037 038 protected static final AwsRegionProvider DEFAULT = new DefaultAwsRegionProviderChain(); 039 040 protected static final String DEFAULT_REGION = "us-east-1"; 041 042 public static AwsRegionProvider getInstance() { 043 return INSTANCE; 044 } 045 046 @Override 047 public String getRegion() { 048 AWSConfigurationService service = Framework.getService(AWSConfigurationService.class); 049 if (service != null) { 050 String region = service.getAWSRegion(); 051 if (region != null) { 052 return region; 053 } 054 } 055 String region; 056 try { 057 region = DEFAULT.getRegion(); 058 } catch (SdkClientException e) { 059 // the DefaultAwsRegionProviderChain throws when there's no provider instead of defaulting to null 060 region = null; 061 } 062 return defaultString(region, DEFAULT_REGION); 063 } 064 065}