| /* |
| * 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.jdbc.service; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.hash.HashCode; |
| import com.google.common.hash.Hashing; |
| import com.google.common.hash.HashingInputStream; |
| import com.google.common.io.ByteStreams; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import com.google.inject.persist.Transactional; |
| import org.jclouds.blobstore.domain.Blob; |
| import org.jclouds.blobstore.domain.BlobAccess; |
| import org.jclouds.blobstore.domain.ContainerAccess; |
| import org.jclouds.jdbc.conversion.BlobToBlobEntity; |
| import org.jclouds.jdbc.entity.BlobEntity; |
| import org.jclouds.jdbc.entity.BlobEntityPK; |
| import org.jclouds.jdbc.entity.ChunkEntity; |
| import org.jclouds.jdbc.entity.ContainerEntity; |
| import org.jclouds.jdbc.entity.PayloadEntity; |
| import org.jclouds.jdbc.reference.JdbcConstants; |
| import org.jclouds.jdbc.repository.BlobRepository; |
| import org.jclouds.jdbc.repository.ChunkRepository; |
| import org.jclouds.jdbc.repository.ContainerRepository; |
| import org.jclouds.util.Closeables2; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Arrays; |
| import java.util.Date; |
| import java.util.List; |
| |
| import static com.google.common.io.BaseEncoding.base16; |
| |
| @Singleton |
| public class JdbcService { |
| |
| private static final String DIRECTORY_MD5 = Hashing.md5().hashBytes(new byte[0]).toString(); |
| |
| private final ContainerRepository containerRepository; |
| private final BlobRepository blobRepository; |
| private final ChunkRepository chunkRepository; |
| private final BlobToBlobEntity blobToBlobEntity; |
| |
| @Inject |
| JdbcService(ContainerRepository containerRepository, BlobRepository blobRepository, ChunkRepository chunkRepository, |
| BlobToBlobEntity blobToBlobEntity) { |
| this.containerRepository = containerRepository; |
| this.blobRepository = blobRepository; |
| this.chunkRepository = chunkRepository; |
| this.blobToBlobEntity = blobToBlobEntity; |
| } |
| |
| @Transactional |
| public void createContainer(String containerName, ContainerAccess access) { |
| containerRepository.create(ContainerEntity.builder().name(containerName).containerAccess(access).build()); |
| } |
| |
| @Transactional |
| public void createContainer(String containerName) { |
| createContainer(containerName, null); |
| } |
| |
| @Transactional |
| public List<ContainerEntity> findAllContainers() { |
| return containerRepository.findAllContainers(); |
| } |
| |
| @Transactional |
| public ContainerEntity findContainerByName(String containerName) { |
| return containerRepository.findContainerByName(containerName); |
| } |
| |
| @Transactional |
| public void deleteContainerByName(String containerName) { |
| containerRepository.deleteContainerByName(containerName); |
| } |
| |
| @Transactional |
| public void setContainerAccessByName(String containerName, ContainerAccess access) { |
| ContainerEntity containerEntity = containerRepository.findContainerByName(containerName); |
| containerEntity.setContainerAccess(access); |
| containerRepository.save(containerEntity); |
| } |
| |
| @Transactional |
| public boolean blobExists(String containerName, String key) { |
| return findBlobById(containerName, key) != null; |
| } |
| |
| @Transactional(rollbackOn = IOException.class) |
| public BlobEntity createOrModifyBlob(String containerName, Blob blob, BlobAccess blobAccess) throws IOException { |
| List<Long> chunks; |
| HashingInputStream his = new HashingInputStream(Hashing.md5(), blob.getPayload().openStream()); |
| try { |
| chunks = storeData(his); |
| } finally { |
| Closeables2.closeQuietly(his); |
| } |
| HashCode actualHashCode = his.hash(); |
| HashCode expectedHashCode = blob.getPayload().getContentMetadata().getContentMD5AsHashCode(); |
| if (expectedHashCode != null && !actualHashCode.equals(expectedHashCode)) { |
| throw new IOException("MD5 hash code mismatch, actual: " + actualHashCode + |
| " expected: " + expectedHashCode); |
| } |
| |
| String key = blob.getMetadata().getName(); |
| Date creationDate = null; |
| BlobEntity oldBlobEntity = findBlobById(containerName, key); |
| if (oldBlobEntity != null) { |
| creationDate = oldBlobEntity.getCreationDate(); |
| } |
| BlobEntity blobEntity = blobToBlobEntity.apply(blob); |
| blobEntity.getPayload().setChunks(chunks); |
| blobEntity.setContainerEntity(containerRepository.findContainerByName(containerName)); |
| blobEntity.setKey(key); |
| blobEntity.setBlobAccess(blobAccess); |
| blobEntity.setTier(blob.getMetadata().getTier()); |
| blobEntity.setCreationDate(creationDate); |
| blobEntity.setLastModified(new Date()); |
| blobEntity.setEtag(base16().lowerCase().encode(actualHashCode.asBytes())); |
| blobEntity.getPayload().setContentMD5(actualHashCode.asBytes()); |
| |
| BlobEntity result = blobRepository.save(blobEntity); |
| return result; |
| } |
| |
| @Transactional |
| public BlobEntity createDirectoryBlob(String containerName, Blob blob, BlobAccess blobAccess) { |
| BlobEntity blobEntity = BlobEntity.builder(null, null) |
| .userMetadata(blob.getMetadata().getUserMetadata()) |
| .directory(true) |
| .payload(PayloadEntity.builder().contentType("application/directory").build()) |
| .build(); |
| blobEntity.setContainerEntity(containerRepository.findContainerByName(containerName)); |
| blobEntity.setKey(blob.getMetadata().getName()); |
| blobEntity.setBlobAccess(blobAccess); |
| blobEntity.setEtag(DIRECTORY_MD5); |
| return blobRepository.save(blobEntity); |
| } |
| |
| @Transactional |
| public BlobEntity createDirectoryBlob(String containerName, Blob blob) { |
| return createDirectoryBlob(containerName, blob, null); |
| } |
| |
| @Transactional(rollbackOn = IOException.class) |
| public BlobEntity createOrModifyBlob(String containerName, Blob blob) throws IOException { |
| return createOrModifyBlob(containerName, blob, null); |
| } |
| |
| @Transactional |
| public BlobEntity findBlobById(String containerName, String key) { |
| ContainerEntity containerEntity = containerRepository.findContainerByName(containerName); |
| return containerEntity == null ? null : blobRepository.find(new BlobEntityPK(containerEntity.getId(), key)); |
| } |
| |
| @Transactional |
| public ChunkEntity findChunkById(Long id) { |
| return chunkRepository.find(id); |
| } |
| |
| @Transactional |
| public List<BlobEntity> findBlobsByContainer(String containerName) { |
| return blobRepository.findBlobsByContainer(containerRepository.findContainerByName(containerName)); |
| } |
| |
| @Transactional |
| public List<BlobEntity> findBlobsByDirectory(String containerName, String directoryName, boolean recursive) { |
| ImmutableList.Builder<BlobEntity> result = ImmutableList.builder(); |
| List<BlobEntity> blobEntities = blobRepository |
| .findBlobsByDirectory(containerRepository.findContainerByName(containerName), directoryName); |
| result.addAll(blobEntities); |
| if (recursive) { |
| for (BlobEntity blobEntity : blobEntities) { |
| if (blobEntity.isDirectory()) { |
| result.addAll(findBlobsByDirectory(containerName, blobEntity.getKey(), true)); |
| } |
| } |
| } |
| return result.build(); |
| } |
| |
| @Transactional |
| public void deleteBlobsByContainer(String containerName) { |
| List<BlobEntity> blobs = findBlobsByContainer(containerName); |
| for (BlobEntity blob : blobs) { |
| deleteBlob(containerName, blob.getKey()); |
| } |
| } |
| |
| @Transactional |
| public void deleteBlobsByDirectory(String containerName, String directoryName, boolean recursive) { |
| List<BlobEntity> blobs = findBlobsByDirectory(containerName, directoryName, false); |
| for (BlobEntity blob : blobs) { |
| if (!blob.isDirectory()) { |
| deleteBlob(containerName, blob.getKey()); |
| } |
| else { |
| if (recursive) { |
| deleteBlobsByDirectory(containerName, blob.getKey(), true); |
| deleteBlob(containerName, blob.getKey()); |
| } |
| } |
| } |
| } |
| |
| @Transactional |
| public void deleteBlob(String containerName, String key) { |
| BlobEntity blobEntity = findBlobById(containerName, key); |
| if (blobEntity != null) { |
| deleteChunks(blobEntity.getPayload().getChunks()); |
| blobRepository.delete(blobEntity); |
| } |
| } |
| |
| @Transactional |
| public void setBlobAccessById(String containerName, String key, BlobAccess access) { |
| BlobEntity blobEntity = findBlobById(containerName, key); |
| blobEntity.setBlobAccess(access); |
| blobRepository.save(blobEntity); |
| } |
| |
| @Transactional |
| private void deleteChunks(List<Long> chunkIds) { |
| for (Long chunkId : chunkIds) { |
| chunkRepository.delete(chunkRepository.find(chunkId)); |
| } |
| } |
| |
| @Transactional(rollbackOn = IOException.class) |
| private List<Long> storeData(InputStream data) throws IOException { |
| ImmutableList.Builder<Long> chunks = ImmutableList.builder(); |
| while (true) { |
| byte[] buffer = new byte[JdbcConstants.DEFAULT_CHUNK_SIZE]; |
| int bytes = ByteStreams.read(data, buffer, 0, JdbcConstants.DEFAULT_CHUNK_SIZE); |
| if (bytes == 0) { |
| break; |
| } else if (bytes != buffer.length) { |
| buffer = Arrays.copyOf(buffer, bytes); |
| } |
| chunks.add(chunkRepository.create(new ChunkEntity(buffer, bytes)).getId()); |
| } |
| return chunks.build(); |
| } |
| } |