| /* |
| * 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.apache.jackrabbit.oak.upgrade.cli.blob; |
| |
| import org.apache.jackrabbit.core.data.DataIdentifier; |
| import org.apache.jackrabbit.core.data.DataRecord; |
| import org.apache.jackrabbit.core.data.DataStore; |
| import org.apache.jackrabbit.core.data.DataStoreException; |
| import org.apache.jackrabbit.oak.plugins.blob.datastore.DataStoreBlobStore; |
| import org.apache.jackrabbit.oak.plugins.blob.datastore.InMemoryDataRecord; |
| import org.apache.jackrabbit.oak.spi.blob.stats.StatsCollectingStreams; |
| import org.jetbrains.annotations.NotNull; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.BufferedInputStream; |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * This implementation of the DataStoreBlobStore won't throw an exception if |
| * it can't find blob with given id. The WARN message will be emitted instead |
| * and the empty InputStream will be returned. |
| */ |
| public class SafeDataStoreBlobStore extends DataStoreBlobStore { |
| |
| private static final Logger log = LoggerFactory.getLogger(SafeDataStoreBlobStore.class); |
| |
| public SafeDataStoreBlobStore(DataStore delegate) { |
| super(delegate); |
| } |
| |
| @Override |
| public String getReference(@NotNull String encodedBlobId) { |
| checkNotNull(encodedBlobId); |
| String blobId = extractBlobId(encodedBlobId); |
| //Reference are not created for in memory record |
| if (InMemoryDataRecord.isInstance(blobId)) { |
| return null; |
| } |
| |
| DataRecord record; |
| try { |
| record = delegate.getRecordIfStored(new DataIdentifier(blobId)); |
| if (record != null) { |
| return record.getReference(); |
| } else { |
| log.debug("No blob found for id [{}]", blobId); |
| } |
| } catch (DataStoreException e) { |
| log.warn("Unable to access the blobId for [{}]", blobId, e); |
| } |
| return null; |
| } |
| |
| |
| @Override |
| protected InputStream getStream(String blobId) throws IOException { |
| try { |
| DataRecord record = getDataRecord(blobId); |
| if (record == null) { |
| log.warn("No blob found for id [{}]", blobId); |
| return new ByteArrayInputStream(new byte[0]); |
| } |
| InputStream in = getDataRecord(blobId).getStream(); |
| if (!(in instanceof BufferedInputStream)){ |
| in = new BufferedInputStream(in); |
| } |
| return StatsCollectingStreams.wrap(stats, blobId, in); |
| } catch (DataStoreException e) { |
| throw new IOException(e); |
| } |
| } |
| |
| @Override |
| protected DataRecord getDataRecord(String blobId) throws DataStoreException { |
| DataRecord id; |
| if (InMemoryDataRecord.isInstance(blobId)) { |
| id = InMemoryDataRecord.getInstance(blobId); |
| } else { |
| id = delegate.getRecordIfStored(new DataIdentifier(blobId)); |
| } |
| return id; |
| } |
| } |