org.aegis.app.sample.s3.blobsample1.java Source code

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Here is the source code for org.aegis.app.sample.s3.blobsample1.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.aegis.app.sample.s3;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.Iterables.contains;

import java.io.IOException;
import java.util.Map;
import java.util.Set;

import org.jclouds.ContextBuilder;
import org.jclouds.apis.ApiMetadata;
import org.jclouds.apis.Apis;
import org.jclouds.blobstore.BlobStore;
import org.jclouds.blobstore.BlobStoreContext;
import org.jclouds.blobstore.domain.Blob;
import org.jclouds.blobstore.domain.StorageMetadata;
import org.jclouds.providers.ProviderMetadata;
import org.jclouds.providers.Providers;
import org.jclouds.rest.RestContext;
import org.jclouds.s3.S3AsyncClient;
import org.jclouds.s3.S3Client;

import com.google.common.base.Charsets;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Maps;
import com.google.common.io.ByteSource;

/**
 * Demonstrates the use of {@link BlobStore}.
 * 
 * Usage is: java MainApp \"provider\" \"identity\" \"credential\"
 * \"containerName\"
 */
@SuppressWarnings("deprecation")
public class blobsample1 {

    public static final Map<String, ApiMetadata> allApis = Maps.uniqueIndex(Apis.viewableAs(BlobStoreContext.class),
            Apis.idFunction());

    public static final Map<String, ProviderMetadata> appProviders = Maps
            .uniqueIndex(Providers.viewableAs(BlobStoreContext.class), Providers.idFunction());

    public static final Set<String> allKeys = ImmutableSet
            .copyOf(Iterables.concat(appProviders.keySet(), allApis.keySet()));

    public static int PARAMETERS = 4;
    public static String INVALID_SYNTAX = "Invalid number of parameters. Syntax is: \"provider\" \"identity\" \"credential\" \"containerName\" ";

    public static void main(String[] args) throws IOException {
        if (args.length < PARAMETERS)
            throw new IllegalArgumentException(INVALID_SYNTAX);

        // Args
        String provider = args[0];

        // note that you can check if a provider is present ahead of time
        checkArgument(contains(allKeys, provider), "provider %s not in supported list: %s", provider, allKeys);

        String identity = args[1];
        String credential = args[2];
        String containerName = args[3];

        // Init
        BlobStoreContext context = ContextBuilder.newBuilder(provider).credentials(identity, credential)
                .buildView(BlobStoreContext.class);

        try {
            // Create Container
            BlobStore blobStore = context.getBlobStore();
            blobStore.createContainerInLocation(null, containerName);
            String blobName = "test";
            ByteSource payload = ByteSource.wrap("testdata".getBytes(Charsets.UTF_8));

            // List Container Metadata
            for (StorageMetadata resourceMd : blobStore.list()) {
                if (containerName.equals(resourceMd.getName())) {
                    System.out.println(resourceMd);
                }
            }

            // Add Blob
            Blob blob = blobStore.blobBuilder(blobName).payload(payload).contentLength(payload.size()).build();
            blobStore.putBlob(containerName, blob);

            // Use Provider API
            if (context.getBackendType().getRawType().equals(RestContext.class)) {
                RestContext<?, ?> rest = context.unwrap();
                Object object = null;
                if (rest.getApi() instanceof S3Client) {
                    RestContext<S3Client, S3AsyncClient> providerContext = context.unwrap();
                    object = providerContext.getApi().headObject(containerName, blobName);
                }
                if (object != null) {
                    System.out.println(object);
                }
            }
        } catch (Exception e) {
            System.err.println("error: " + e.getMessage());
        } finally {
            // Close connecton
            context.close();
            System.exit(0);
        }
    }
}