ohnosequences.ivy.S3Resource.java Source code

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Here is the source code for ohnosequences.ivy.S3Resource.java

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/*
 * Copyright 2004-2007 the original author or authors.
 *
 * 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 ohnosequences.ivy;

import java.io.InputStream;

import com.amazonaws.AmazonServiceException;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.ObjectMetadata;
import org.apache.ivy.plugins.repository.Resource;

/**
 * A Resource implementation that extracts its data from an S3 resource.
 * 
 * @author Ben Hale
 * @author Evdokim Kovach
 */
public class S3Resource implements Resource {

    private S3Repository s3Repo;

    private String bucket;

    private String key;

    private boolean exists;

    private long contentLength;

    private long lastModified;

    private String name;

    public S3Resource(S3Repository s3Repo, String uri) {
        this.s3Repo = s3Repo;
        initializeS3(uri);
        initalizeResource();
        this.name = uri;
    }

    public Resource clone(String newUri) {
        return new S3Resource(s3Repo, newUri);
    }

    public boolean exists() {
        return exists;
    }

    public long getContentLength() {
        return contentLength;
    }

    public long getLastModified() {
        return lastModified;
    }

    public String getName() {
        return name;
    }

    public boolean isLocal() {
        return false;
    }

    public InputStream openStream() {
        try {
            return s3Repo.getS3Client().getObject(bucket, key).getObjectContent();
        } catch (AmazonServiceException e) {
            throw new S3RepositoryException(e);
        }
    }

    private void initializeS3(String uri) {
        this.bucket = S3Utils.getBucket(uri);
        this.key = S3Utils.getKey(uri);
    }

    private void initalizeResource() {
        try {
            // System.out.println("trying to resolve bucket=" + bucket + " key=" + key);
            ObjectMetadata metadata = s3Repo.getS3Client().getObjectMetadata(bucket, key);

            this.exists = true;
            this.contentLength = metadata.getContentLength();
            this.lastModified = metadata.getLastModified().getTime();

        } catch (AmazonServiceException e) {
            this.exists = false;
            this.contentLength = 0;
            this.lastModified = 0;
            this.name = "";
        }
    }

}