onl.area51.filesystem.s3.AbstractS3Action.java Source code

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Here is the source code for onl.area51.filesystem.s3.AbstractS3Action.java

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/*
 * Copyright 2016 peter.
 *
 * 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
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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 onl.area51.filesystem.s3;

import com.amazonaws.AmazonClientException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import java.util.Map;
import java.util.Objects;
import onl.area51.filesystem.FileSystemUtils;
import onl.area51.filesystem.io.FileSystemIO;

/**
 *
 * @author peter
 */
public abstract class AbstractS3Action {

    public static final String BUCKET = "bucket";
    public static final String BUCKET_READ = "bucket.read";
    private final FileSystemIO delegate;
    private final AmazonS3 s3;
    private final String bucketName;

    public AbstractS3Action(FileSystemIO delegate, Map<String, ?> env) {
        this.delegate = delegate;

        AWSCredentials credentials;
        try {
            credentials = new ProfileCredentialsProvider().getCredentials();
        } catch (Exception ex) {
            throw new AmazonClientException("Cannot load the credentials from the credential profiles file. "
                    + "Please make sure that your credentials file is at the correct "
                    + "location (~/.aws/credentials), and is in valid format.", ex);
        }

        s3 = new AmazonS3Client(credentials);
        Region region = Region.getRegion(Regions.EU_WEST_1);
        s3.setRegion(region);

        String n = FileSystemUtils.get(env, BUCKET_READ);
        if (n == null || n.trim().isEmpty()) {
            n = FileSystemUtils.get(env, BUCKET);
        }
        bucketName = Objects.requireNonNull(n, BUCKET + " or " + BUCKET_READ + " is not defined");
    }

    protected final FileSystemIO getDelegate() {
        return delegate;
    }

    protected final String getBucketName() {
        return bucketName;
    }

    protected final AmazonS3 getS3() {
        return s3;
    }

}