AwsSupport.java

package org.eluder.logback.ext.aws.core;

/*
 * #[license]
 * logback-ext-aws-core
 * %%
 * Copyright (C) 2014 - 2015 Tapio Rautonen
 * %%
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * %[license]
 */

import com.amazonaws.ClientConfiguration;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSCredentialsProvider;
import com.amazonaws.auth.AWSCredentialsProviderChain;
import com.amazonaws.auth.EnvironmentVariableCredentialsProvider;
import com.amazonaws.auth.InstanceProfileCredentialsProvider;
import com.amazonaws.auth.SystemPropertiesCredentialsProvider;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.internal.StaticCredentialsProvider;

public class AwsSupport {

    public AWSCredentialsProvider getCredentials() {
        return getCredentials(null);
    }

    public AWSCredentialsProvider getCredentials(AWSCredentials credentials) {
        return new AWSCredentialsProviderChain(
                new EnvironmentVariableCredentialsProvider(),
                new SystemPropertiesCredentialsProvider(),
                new StaticCredentialsProvider(credentials == null ? new NullCredentials() : credentials),
                new ProfileCredentialsProvider(),
                new InstanceProfileCredentialsProvider()
        );
    }

    public ClientConfiguration getClientConfiguration() {
        return new ClientConfiguration();
    }

    private static class NullCredentials implements AWSCredentials {
        @Override
        public String getAWSAccessKeyId() {
            return null;
        }

        @Override
        public String getAWSSecretKey() {
            return null;
        }
    }
}