org.jclouds.blobstore.GetPath.java Source code

Introduction

Here is the source code for org.jclouds.blobstore.GetPath.java

Source

/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds licenses this file
 * to you 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 org.jclouds.blobstore;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.util.Map.Entry;

import org.jclouds.blobstore.util.BlobStoreUtils;
import org.jclouds.domain.Credentials;
import org.jclouds.http.HttpUtils;

import com.google.common.io.ByteStreams;
import com.google.common.io.Closeables;

/**
 * 
 * Usage is: java GetPath blobstore://identity:key@service/container/path destinationPath
 * 
 * @author Adrian Cole
 */
public class GetPath {

    public static String INVALID_SYNTAX = "Invalid parameters. Syntax is: blobstore://identity:key@service/container/path destinationPath";

    public static void main(String... args) throws IOException {
        if (args.length < 2)
            throw new IllegalArgumentException(INVALID_SYNTAX);
        URI uri;
        try {
            uri = HttpUtils.createUri(args[0]);
            checkArgument(uri.getScheme().equals("blobstore"), "wrong scheme");
        } catch (IllegalArgumentException e) {
            throw new IllegalArgumentException(String.format("%s%n%s", e.getMessage(), INVALID_SYNTAX));
        }
        checkArgument(args[1] != null, String.format("destination must be specified%n%s", INVALID_SYNTAX));

        File destinationDir = new File(args[1]);
        destinationDir.mkdirs();

        String provider = uri.getHost();
        Credentials creds = Credentials.parse(uri);

        BlobStoreContext context = new BlobStoreContextFactory().createContext(provider, creds.identity,
                creds.credential);

        String path = uri.getPath();
        if (path.startsWith("/"))
            path = path.substring(1);
        String container = BlobStoreUtils.parseContainerFromPath(path);
        String directory = BlobStoreUtils.parsePrefixFromPath(path);
        copyDirectoryToDestination(context, container, directory, destinationDir);
    }

    private static void copyDirectoryToDestination(BlobStoreContext context, String container, String directory,
            File destinationDir) throws FileNotFoundException, IOException {
        InputStream input = null;

        try {
            checkState(context.getBlobStore().containerExists(container),
                    String.format("source container %s does not exist", directory, container));
            checkState(context.getBlobStore().directoryExists(container, directory),
                    String.format("source directory %s does not exist in container %s", directory, container));

            String path = container + "/" + directory;
            InputStreamMap map = context.createInputStreamMap(path);
            System.out.printf("fetching %d entries from %s %s%n", map.size(),
                    context.getProviderSpecificContext().getIdentity(), path);
            for (Entry<String, InputStream> entry : map.entrySet()) {
                System.out.printf("getting file: %s/%s%n", path, entry.getKey());
                input = entry.getValue();
                File file = new File(destinationDir, entry.getKey());
                OutputStream out = new FileOutputStream(file);
                ByteStreams.copy(input, out);
                out.flush();
                out.close();
            }

        } finally {
            // Close connection
            Closeables.closeQuietly(input);
        }
    }

}