| /* |
| * 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.plugins.blob.datastore; |
| |
| import java.util.List; |
| import java.util.Set; |
| |
| import com.google.common.base.Function; |
| import com.google.common.base.Joiner; |
| import com.google.common.base.Splitter; |
| import com.google.common.collect.FluentIterable; |
| import com.google.common.collect.Ordering; |
| import com.google.common.collect.Sets; |
| import org.apache.jackrabbit.core.data.DataRecord; |
| import org.apache.jackrabbit.oak.plugins.blob.SharedDataStore; |
| import org.apache.jackrabbit.oak.spi.blob.BlobStore; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Utility class for {@link SharedDataStore}. |
| */ |
| public class SharedDataStoreUtils { |
| /** |
| * Checks if the blob store shared. |
| * |
| * @param blobStore the blob store |
| * @return true if shared |
| */ |
| public static boolean isShared(BlobStore blobStore) { |
| return (blobStore instanceof SharedDataStore) |
| && (((SharedDataStore) blobStore).getType() == SharedDataStore.Type.SHARED); |
| } |
| |
| /** |
| * Gets the earliest record of the available reference records. |
| * |
| * @param recs the recs |
| * @return the earliest record |
| */ |
| public static DataRecord getEarliestRecord(List<DataRecord> recs) { |
| return Ordering.natural().onResultOf( |
| new Function<DataRecord, Long>() { |
| @Override |
| @Nullable |
| public Long apply(@NotNull DataRecord input) { |
| return input.getLastModified(); |
| } |
| }).min(recs); |
| } |
| |
| /** |
| * Repositories from which marked references not available. |
| * |
| * @param repos the repos |
| * @param refs the refs |
| * @return the sets the sets whose references not available |
| */ |
| public static Set<String> refsNotAvailableFromRepos(List<DataRecord> repos, |
| List<DataRecord> refs) { |
| return Sets.difference(FluentIterable.from(repos).uniqueIndex( |
| new Function<DataRecord, String>() { |
| @Override |
| @Nullable |
| public String apply(@NotNull DataRecord input) { |
| return SharedStoreRecordType.REPOSITORY.getIdFromName(input.getIdentifier().toString()); |
| } |
| }).keySet(), |
| FluentIterable.from(refs).index( |
| new Function<DataRecord, String>() { |
| @Override |
| @Nullable |
| public String apply(@NotNull DataRecord input) { |
| return SharedStoreRecordType.REFERENCES.getIdFromName(input.getIdentifier().toString()); |
| } |
| }).keySet()); |
| } |
| |
| /** |
| * Encapsulates the different type of records at the data store root. |
| */ |
| public enum SharedStoreRecordType { |
| REFERENCES("references"), |
| REPOSITORY("repository"), |
| MARKED_START_MARKER("markedTimestamp"), |
| BLOBREFERENCES("blob"); |
| |
| private final String type; |
| |
| SharedStoreRecordType(String type) { |
| this.type = type; |
| } |
| |
| public String getType() { |
| return type; |
| } |
| |
| public String getIdFromName(String name) { |
| return Splitter.on("_").limit(2).splitToList( |
| Splitter.on(DELIM).limit(2).splitToList(name).get(1)).get(0); |
| } |
| |
| public String getNameFromId(String id) { |
| return Joiner.on(DELIM).join(getType(), id); |
| } |
| |
| /** |
| * Creates name from id and prefix. The format returned is of the form |
| * references-id_prefix. |
| * |
| * @param id |
| * @param prefix |
| * @return |
| */ |
| public String getNameFromIdPrefix(String id, String prefix) { |
| return Joiner.on("_").join( |
| Joiner.on(DELIM).join(getType(), id), |
| prefix); |
| } |
| |
| static final String DELIM = "-"; |
| } |
| } |
| |