| 1 | /** |
| 2 | * Licensed to jclouds, Inc. (jclouds) under one or more |
| 3 | * contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. jclouds licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.jclouds.blobstore.config; |
| 20 | |
| 21 | import javax.inject.Inject; |
| 22 | import javax.inject.Provider; |
| 23 | |
| 24 | import org.jclouds.blobstore.domain.Blob; |
| 25 | import org.jclouds.blobstore.domain.MutableBlobMetadata; |
| 26 | import org.jclouds.blobstore.domain.internal.BlobImpl; |
| 27 | |
| 28 | import com.google.inject.AbstractModule; |
| 29 | import com.google.inject.Provides; |
| 30 | import com.google.inject.Scopes; |
| 31 | |
| 32 | /** |
| 33 | * Configures the domain object mappings needed for all Blob implementations |
| 34 | * |
| 35 | * @author Adrian Cole |
| 36 | */ |
| 37 | public class BlobStoreObjectModule extends AbstractModule { |
| 38 | |
| 39 | /** |
| 40 | * explicit factories are created here as it has been shown that Assisted Inject is extremely |
| 41 | * inefficient. http://code.google.com/p/google-guice/issues/detail?id=435 |
| 42 | */ |
| 43 | @Override |
| 44 | protected void configure() { |
| 45 | bind(Blob.Factory.class).to(BlobFactory.class).in(Scopes.SINGLETON); |
| 46 | } |
| 47 | |
| 48 | private static class BlobFactory implements Blob.Factory { |
| 49 | |
| 50 | @Inject |
| 51 | Provider<MutableBlobMetadata> metadataProvider; |
| 52 | |
| 53 | public Blob create(MutableBlobMetadata metadata) { |
| 54 | return new BlobImpl(metadata != null ? metadata : metadataProvider.get()); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | @Provides |
| 59 | Blob provideBlob(Blob.Factory factory) { |
| 60 | return factory.create(null); |
| 61 | } |
| 62 | |
| 63 | } |