org.kuali.maven.wagon.auth.AuthenticationInfoCredentialsProvider Maven / Gradle / Ivy

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* forked from org.kuali.maven.wagons:maven-s3-wagon This project is an implementation of a multi-threaded Wagon provider for accessing Amazon's Simple Storage Service (S3). It enables Maven to download files from and deploy files to S3. It draws heavily from code developed by Ben Hale at SpringSource

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/**
 * Copyright 2010-2015 The Kuali Foundation
 *
 * Licensed under the Educational Community 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
 *
 * http://www.opensource.org/licenses/ecl2.php
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License 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 org.kuali.maven.wagon.auth;

import org.apache.maven.wagon.authentication.AuthenticationInfo;

import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSCredentialsProvider;
import com.google.common.base.Optional;

public final class AuthenticationInfoCredentialsProvider implements AWSCredentialsProvider {

	public AuthenticationInfoCredentialsProvider(Optional auth) {
		Assert.notNull(auth);
		this.auth = auth;
	}

	private final Optional auth;

	public AWSCredentials getCredentials() {
		if (!auth.isPresent()) {
			throw new IllegalStateException(getAuthenticationErrorMessage());
		}
		String accessKey = auth.get().getUserName();
		String secretKey = auth.get().getPassword();
		Assert.noBlanksWithMsg(getAuthenticationErrorMessage(), accessKey, secretKey);
		return new AwsCredentials(accessKey, secretKey);
	}

	public void refresh() {
		// no-op
	}

	protected String getAuthenticationErrorMessage() {
		StringBuffer sb = new StringBuffer();
		sb.append("The S3 wagon needs AWS Access Key set as the username and AWS Secret Key set as the password. eg:\n");
		sb.append("\n");
		sb.append("  my.server\n");
		sb.append("  [AWS Access Key ID]\n");
		sb.append("  [AWS Secret Access Key]\n");
		sb.append("\n");
		return sb.toString();
	}

}