com.amazonaws.services.s3.internal.UseArnRegionResolver Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of aws-java-sdk-s3 Show documentation
Show all versions of aws-java-sdk-s3 Show documentation
The AWS Java SDK for Amazon S3 module holds the client classes that are used for communicating with Amazon Simple Storage Service
The newest version!
/*
* Copyright 2010-2024 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.internal;
import com.amazonaws.annotation.SdkInternalApi;
import com.amazonaws.annotation.ThreadSafe;
import java.io.File;
import com.amazonaws.auth.profile.ProfilesConfigFile;
import com.amazonaws.auth.profile.internal.AwsProfileNameLoader;
import com.amazonaws.auth.profile.internal.BasicProfile;
import com.amazonaws.profile.path.AwsProfileFileLocationProvider;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Resolves the use arn region option for S3.
*/
@ThreadSafe
@SdkInternalApi
public final class UseArnRegionResolver {
private static final Log log = LogFactory.getLog(UseArnRegionResolver.class);
private static final String ENV_VAR = "AWS_S3_USE_ARN_REGION";
private static final String PROFILE_PROPERTY = "s3_use_arn_region";
private final AwsProfileFileLocationProvider configFileLocationProvider;
private final boolean useArnRegion;
private volatile String profileName;
private volatile ProfilesConfigFile configFile;
private volatile boolean profileLoadAttempted;
public UseArnRegionResolver() {
this(AwsProfileFileLocationProvider.DEFAULT_CONFIG_LOCATION_PROVIDER);
}
public UseArnRegionResolver(AwsProfileFileLocationProvider configFileLocationProvider) {
this.configFileLocationProvider = configFileLocationProvider;
this.useArnRegion = resolveUseArnRegion();
}
public boolean useArnRegion() {
return useArnRegion;
}
private boolean resolveUseArnRegion() {
String useArnRegionString = envVar();
if (useArnRegionString == null) {
useArnRegionString = profile();
}
return Boolean.valueOf(useArnRegionString);
}
private String envVar() {
return System.getenv(ENV_VAR);
}
private String profile() {
String loadedProfileName = getProfileName();
BasicProfile profile = getProfile(loadedProfileName);
if (profile == null) {
return null;
}
String val = profile.getPropertyValue(PROFILE_PROPERTY);
return val;
}
private String getProfileName() {
if (profileName == null) {
synchronized (this) {
if (profileName == null) {
profileName = AwsProfileNameLoader.INSTANCE.loadProfileName();
}
}
}
return profileName;
}
private BasicProfile getProfile(String profileName) {
ProfilesConfigFile profilesConfigFile = getProfilesConfigFile();
if (profilesConfigFile != null) {
return profilesConfigFile.getAllBasicProfiles().get(profileName);
}
return null;
}
// ProfilesConfigFile immediately loads the profiles at construction time
private ProfilesConfigFile getProfilesConfigFile() {
if (!profileLoadAttempted) {
synchronized (this) {
if (!profileLoadAttempted) {
File location = null;
try {
location = configFileLocationProvider.getLocation();
if (location != null) {
configFile = new ProfilesConfigFile(location);
}
} catch (Exception e) {
if (log.isWarnEnabled()) {
log.warn("Unable to load config file " + location, e);
}
} finally {
profileLoadAttempted = true;
}
}
}
}
return configFile;
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy