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.atmos.internal; import static com.google.common.base.Preconditions.checkNotNull; import static com.google.common.util.concurrent.Futures.immediateFailedFuture; import static com.google.common.util.concurrent.Futures.immediateFuture; import java.io.IOException; import java.net.URI; import java.util.concurrent.ExecutionException; import javax.inject.Inject; import javax.inject.Named; import org.jclouds.Constants; import org.jclouds.atmos.AtmosAsyncClient; import org.jclouds.atmos.blobstore.functions.BlobMetadataToObject; import org.jclouds.atmos.blobstore.functions.BlobToObject; import org.jclouds.atmos.blobstore.functions.ListOptionsToBlobStoreListOptions; import org.jclouds.atmos.blobstore.functions.ObjectToBlob; import org.jclouds.atmos.blobstore.functions.ResourceMetadataListToDirectoryEntryList; import org.jclouds.atmos.domain.AtmosObject; import org.jclouds.atmos.domain.BoundedSet; import org.jclouds.atmos.domain.DirectoryEntry; import org.jclouds.atmos.domain.SystemMetadata; import org.jclouds.atmos.domain.UserMetadata; import org.jclouds.atmos.options.ListOptions; import org.jclouds.atmos.options.PutOptions; import org.jclouds.blobstore.LocalAsyncBlobStore; import org.jclouds.blobstore.domain.Blob; import org.jclouds.blobstore.domain.BlobMetadata; import org.jclouds.blobstore.functions.HttpGetOptionsListToGetOptions; import org.jclouds.http.options.GetOptions; import org.jclouds.lifecycle.Closer; import com.google.common.base.Function; import com.google.common.base.Throwables; import com.google.common.util.concurrent.Futures; import com.google.common.util.concurrent.ListenableFuture; import com.google.common.util.concurrent.ListeningExecutorService; /** * Implementation of {@link AtmosAsyncClient} which keeps all data in a local Map object. * * @author Adrian Cole */ public class StubAtmosAsyncClient implements AtmosAsyncClient { private final HttpGetOptionsListToGetOptions httpGetOptionsConverter; private final LocalAsyncBlobStore blobStore; private final AtmosObject.Factory objectProvider; private final ObjectToBlob object2Blob; private final BlobToObject blob2Object; private final BlobMetadataToObject blob2ObjectInfo; private final ListOptionsToBlobStoreListOptions container2ContainerListOptions; private final ResourceMetadataListToDirectoryEntryList resource2ObjectList; private final ListeningExecutorService userExecutor; private final Closer closer; @Inject private StubAtmosAsyncClient(LocalAsyncBlobStore blobStore, AtmosObject.Factory objectProvider, HttpGetOptionsListToGetOptions httpGetOptionsConverter, ObjectToBlob object2Blob, BlobToObject blob2Object, BlobMetadataToObject blob2ObjectInfo, ListOptionsToBlobStoreListOptions container2ContainerListOptions, @Named(Constants.PROPERTY_USER_THREADS) ListeningExecutorService userExecutor, ResourceMetadataListToDirectoryEntryList resource2ContainerList, Closer closer) { this.blobStore = blobStore; this.objectProvider = objectProvider; this.httpGetOptionsConverter = httpGetOptionsConverter; this.object2Blob = checkNotNull(object2Blob, "object2Blob"); this.blob2Object = checkNotNull(blob2Object, "blob2Object"); this.blob2ObjectInfo = checkNotNull(blob2ObjectInfo, "blob2ObjectInfo"); this.container2ContainerListOptions = checkNotNull(container2ContainerListOptions, "container2ContainerListOptions"); this.resource2ObjectList = checkNotNull(resource2ContainerList, "resource2ContainerList"); this.userExecutor = userExecutor; this.closer = checkNotNull(closer, "closer"); } @Override public ListenableFuture<URI> createDirectory(String directoryName, PutOptions... options) { final String container; final String path; if (directoryName.indexOf('/') != -1) { container = directoryName.substring(0, directoryName.indexOf('/')); path = directoryName.substring(directoryName.indexOf('/') + 1); } else { container = directoryName; path = null; } return Futures.transform(blobStore.createContainerInLocation(null, container), new Function<Boolean, URI>() { public URI apply(Boolean from) { if (path != null) { Blob blob = blobStore.blobBuilder(path + "/").payload("") .contentType("application/directory").build(); blobStore.putBlob(container, blob); } return URI.create("http://stub/containers/" + container); } }, userExecutor); } @Override public ListenableFuture<URI> createFile(String parent, AtmosObject object, PutOptions... options) { final String uri = "http://stub/containers/" + parent + "/" + object.getContentMetadata().getName(); String file = object.getContentMetadata().getName(); String container = parent; if (parent.indexOf('/') != -1) { container = parent.substring(0, parent.indexOf('/')); String path = parent.substring(parent.indexOf('/') + 1); if (!path.equals("")) object.getContentMetadata().setName(path + "/" + file); } Blob blob = object2Blob.apply(object); return Futures.transform(blobStore.putBlob(container, blob), new Function<String, URI>() { public URI apply(String from) { return URI.create(uri); } }, userExecutor); } @Override public ListenableFuture<Void> deletePath(String path) { if (path.indexOf('/') == path.length() - 1) { // chop off the trailing slash return Futures.transform(blobStore.deleteContainerIfEmpty(path.substring(0, path.length() - 1)), new Function<Boolean, Void>() { public Void apply(Boolean from) { return null; } }, userExecutor); } else { String container = path.substring(0, path.indexOf('/')); path = path.substring(path.indexOf('/') + 1); return blobStore.removeBlob(container, path); } } @Override public ListenableFuture<SystemMetadata> getSystemMetadata(String path) { throw new UnsupportedOperationException(); } @Override public ListenableFuture<UserMetadata> getUserMetadata(String path) { if (path.indexOf('/') == -1) throw new UnsupportedOperationException(); else { String container = path.substring(0, path.indexOf('/')); path = path.substring(path.indexOf('/') + 1); return Futures.transform(blobStore.blobMetadata(container, path), new Function<BlobMetadata, UserMetadata>() { public UserMetadata apply(BlobMetadata from) { return blob2ObjectInfo.apply(from).getUserMetadata(); } }, userExecutor); } } @Override public ListenableFuture<AtmosObject> headFile(String path) { String container = path.substring(0, path.indexOf('/')); path = path.substring(path.indexOf('/') + 1); try { return Futures.transform(blobStore.getBlob(container, path), blob2Object, userExecutor); } catch (Exception e) { return immediateFailedFuture(Throwables.getRootCause(e)); } } @Override public ListenableFuture<BoundedSet<? extends DirectoryEntry>> listDirectories(ListOptions... optionsList) { // org.jclouds.blobstore.options.ListOptions options = container2ContainerListOptions // .apply(optionsList); return Futures.transform(blobStore.list(), resource2ObjectList, userExecutor); } @Override public ListenableFuture<BoundedSet<? extends DirectoryEntry>> listDirectory(String directoryName, ListOptions... optionsList) { org.jclouds.blobstore.options.ListContainerOptions options = container2ContainerListOptions .apply(optionsList); String container = directoryName; if (directoryName.indexOf('/') != -1) { container = directoryName.substring(0, directoryName.indexOf('/')); String path = directoryName.substring(directoryName.indexOf('/') + 1); if (!path.equals("")) options.inDirectory(path); } return Futures.transform(blobStore.list(container, options), resource2ObjectList, userExecutor); } @Override public AtmosObject newObject() { return this.objectProvider.create(null); } @Override public ListenableFuture<Boolean> pathExists(final String path) { if (path.indexOf('/') == path.length() - 1) { // chop off the trailing slash return blobStore.containerExists(path.substring(0, path.length() - 1)); } else { String container = path.substring(0, path.indexOf('/')); String blobName = path.substring(path.indexOf('/') + 1); try { return immediateFuture(blobStore.blobMetadata(container, blobName).get() != null); } catch (InterruptedException e) { return immediateFailedFuture(e); } catch (ExecutionException e) { return immediateFailedFuture(e); } } } @Override public ListenableFuture<AtmosObject> readFile(String path, GetOptions... options) { String container = path.substring(0, path.indexOf('/')); String blobName = path.substring(path.indexOf('/') + 1); org.jclouds.blobstore.options.GetOptions getOptions = httpGetOptionsConverter.apply(options); return Futures.transform(blobStore.getBlob(container, blobName, getOptions), blob2Object, userExecutor); } @Override public ListenableFuture<Void> updateFile(String parent, AtmosObject object, PutOptions... options) { throw new UnsupportedOperationException(); } @Override public ListenableFuture<Boolean> isPublic(String path) { throw new UnsupportedOperationException(); } @Override public void close() throws IOException { closer.close(); } }