Java tutorial
/* * 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.jclouds.blobstore.strategy.internal; import javax.inject.Named; import javax.inject.Singleton; import org.jclouds.blobstore.BlobStore; import org.jclouds.blobstore.domain.StorageType; import org.jclouds.blobstore.reference.BlobStoreConstants; import org.jclouds.blobstore.strategy.MkdirStrategy; import com.google.common.io.ByteSource; import com.google.inject.Inject; /** * Key-value implementations of BlobStore, such as S3, do not have directories. In following the * rackspace cloud files project, we use an empty object '#{dirpath}' with content type set to * 'application/directory'. */ @Singleton public class MarkerFileMkdirStrategy implements MkdirStrategy { @Inject(optional = true) @Named(BlobStoreConstants.PROPERTY_BLOBSTORE_DIRECTORY_SUFFIX) protected String directorySuffix = ""; private final BlobStore blobStore; @Inject MarkerFileMkdirStrategy(BlobStore blobStore) { this.blobStore = blobStore; } public void execute(String containerName, String directory) { blobStore.putBlob(containerName, blobStore.blobBuilder(directory + directorySuffix).type(StorageType.RELATIVE_PATH) .payload(ByteSource.empty()).contentLength(0L).contentType("application/directory") .build()); } }