| 1 | /** |
| 2 | * |
| 3 | * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com> |
| 4 | * |
| 5 | * ==================================================================== |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * 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, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | * ==================================================================== |
| 18 | */ |
| 19 | package org.jclouds.blobstore.internal; |
| 20 | |
| 21 | import static com.google.common.collect.Iterables.transform; |
| 22 | import static com.google.common.collect.Lists.newArrayList; |
| 23 | import static org.jclouds.io.Payloads.newPayload; |
| 24 | |
| 25 | import java.io.File; |
| 26 | import java.io.IOException; |
| 27 | import java.io.InputStream; |
| 28 | import java.util.Collection; |
| 29 | import java.util.Map; |
| 30 | |
| 31 | import javax.inject.Inject; |
| 32 | import javax.inject.Provider; |
| 33 | |
| 34 | import org.jclouds.blobstore.BlobMap; |
| 35 | import org.jclouds.blobstore.BlobStore; |
| 36 | import org.jclouds.blobstore.InputStreamMap; |
| 37 | import org.jclouds.blobstore.domain.Blob; |
| 38 | import org.jclouds.blobstore.domain.BlobBuilder; |
| 39 | import org.jclouds.blobstore.options.ListContainerOptions; |
| 40 | import org.jclouds.blobstore.strategy.ContainsValueInListStrategy; |
| 41 | import org.jclouds.blobstore.strategy.GetBlobsInListStrategy; |
| 42 | import org.jclouds.blobstore.strategy.PutBlobsStrategy; |
| 43 | import org.jclouds.blobstore.strategy.internal.ListContainerAndRecurseThroughFolders; |
| 44 | import org.jclouds.crypto.Crypto; |
| 45 | import org.jclouds.io.Payload; |
| 46 | import org.jclouds.io.Payloads; |
| 47 | import org.jclouds.io.payloads.ByteArrayPayload; |
| 48 | import org.jclouds.io.payloads.FilePayload; |
| 49 | import org.jclouds.io.payloads.InputStreamPayload; |
| 50 | import org.jclouds.io.payloads.StringPayload; |
| 51 | |
| 52 | import com.google.common.annotations.VisibleForTesting; |
| 53 | import com.google.common.base.Function; |
| 54 | import com.google.common.base.Throwables; |
| 55 | |
| 56 | /** |
| 57 | * Map representation of a live connection to a BlobStore. All put operations will result in ETag |
| 58 | * calculation. If this is not desired, use {@link BlobMap} instead. |
| 59 | * |
| 60 | * @author Adrian Cole |
| 61 | * |
| 62 | * @see BlobStore |
| 63 | * @see InputStreamMap |
| 64 | * @see BaseBlobMap |
| 65 | */ |
| 66 | public class InputStreamMapImpl extends BaseBlobMap<InputStream> implements InputStreamMap { |
| 67 | protected final Crypto crypto; |
| 68 | |
| 69 | @Inject |
| 70 | public InputStreamMapImpl(BlobStore connection, Provider<BlobBuilder> blobBuilders, |
| 71 | GetBlobsInListStrategy getAllBlobs, ListContainerAndRecurseThroughFolders listStrategy, |
| 72 | ContainsValueInListStrategy containsValueStrategy, PutBlobsStrategy putBlobsStrategy, String containerName, |
| 73 | ListContainerOptions options, Crypto crypto) { |
| 74 | super(connection, getAllBlobs, containsValueStrategy, putBlobsStrategy, listStrategy, containerName, options); |
| 75 | this.crypto = crypto; |
| 76 | } |
| 77 | |
| 78 | @Override |
| 79 | public InputStream get(Object o) { |
| 80 | String realKey = prefixer.apply(o.toString()); |
| 81 | Blob blob = blobstore.getBlob(containerName, realKey); |
| 82 | return getInputStreamOrNull(blob); |
| 83 | } |
| 84 | |
| 85 | private InputStream getInputStreamOrNull(Blob blob) { |
| 86 | return blob != null ? blob.getPayload() != null ? blob.getPayload().getInput() : null : null; |
| 87 | } |
| 88 | |
| 89 | @Override |
| 90 | public InputStream remove(Object o) { |
| 91 | InputStream old = get(o); |
| 92 | String realKey = prefixer.apply(o.toString()); |
| 93 | blobstore.removeBlob(containerName, realKey); |
| 94 | return old; |
| 95 | } |
| 96 | |
| 97 | @Override |
| 98 | public Collection<InputStream> values() { |
| 99 | return newArrayList(transform(getAllBlobs.execute(containerName, options), new Function<Blob, InputStream>() { |
| 100 | public InputStream apply(Blob from) { |
| 101 | return getInputStreamOrNull(from); |
| 102 | } |
| 103 | })); |
| 104 | } |
| 105 | |
| 106 | @Override |
| 107 | public void putAll(Map<? extends String, ? extends InputStream> map) { |
| 108 | putAllInternal(map); |
| 109 | } |
| 110 | |
| 111 | @Override |
| 112 | public void putAllBytes(Map<? extends String, ? extends byte[]> map) { |
| 113 | putAllInternal(map); |
| 114 | } |
| 115 | |
| 116 | @Override |
| 117 | public void putAllFiles(Map<? extends String, ? extends File> map) { |
| 118 | putAllInternal(map); |
| 119 | } |
| 120 | |
| 121 | @Override |
| 122 | public void putAllStrings(Map<? extends String, ? extends String> map) { |
| 123 | putAllInternal(map); |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * submits requests to add all objects and collects the results later. All values will have eTag |
| 128 | * calculated first. As a side-effect of this, the content will be copied into a byte []. |
| 129 | * |
| 130 | * @see S3Client#put(String, Blob) |
| 131 | */ |
| 132 | @VisibleForTesting |
| 133 | void putAllInternal(Map<? extends String, ? extends Object> map) { |
| 134 | putBlobsStrategy.execute(containerName, |
| 135 | transform(map.entrySet(), new Function<Map.Entry<? extends String, ? extends Object>, Blob>() { |
| 136 | @Override |
| 137 | public Blob apply(Map.Entry<? extends String, ? extends Object> from) { |
| 138 | String name = from.getKey(); |
| 139 | Object value = from.getValue(); |
| 140 | return newBlobWithMD5(name, value); |
| 141 | } |
| 142 | |
| 143 | })); |
| 144 | } |
| 145 | |
| 146 | @VisibleForTesting |
| 147 | Blob newBlobWithMD5(String name, Object value) { |
| 148 | Blob blob = blobstore.blobBuilder(prefixer.apply(name)).payload(newPayload(value)).build(); |
| 149 | try { |
| 150 | Payloads.calculateMD5(blob, crypto.md5()); |
| 151 | } catch (IOException e) { |
| 152 | Throwables.propagate(e); |
| 153 | } |
| 154 | return blob; |
| 155 | } |
| 156 | |
| 157 | @Override |
| 158 | public InputStream putString(String key, String value) { |
| 159 | return putInternal(key, new StringPayload(value)); |
| 160 | } |
| 161 | |
| 162 | @Override |
| 163 | public InputStream putFile(String key, File value) { |
| 164 | return putInternal(key, new FilePayload(value)); |
| 165 | } |
| 166 | |
| 167 | @Override |
| 168 | public InputStream putBytes(String key, byte[] value) { |
| 169 | return putInternal(key, new ByteArrayPayload(value)); |
| 170 | } |
| 171 | |
| 172 | @Override |
| 173 | public InputStream put(String key, InputStream value) { |
| 174 | return putInternal(key, new InputStreamPayload(value)); |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * calculates eTag before adding the object to s3. As a side-effect of this, the content will be |
| 179 | * copied into a byte []. * |
| 180 | * |
| 181 | * @see S3Client#put(String, Blob) |
| 182 | */ |
| 183 | @VisibleForTesting |
| 184 | InputStream putInternal(String name, Payload payload) { |
| 185 | InputStream returnVal = containsKey(name) ? get(name) : null; |
| 186 | Blob blob = newBlobWithMD5(name, payload); |
| 187 | blobstore.putBlob(containerName, blob); |
| 188 | return returnVal; |
| 189 | } |
| 190 | |
| 191 | } |