| /* |
| * 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.usergrid.corepersistence.export; |
| |
| |
| import com.google.common.base.Optional; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import org.apache.usergrid.corepersistence.ManagerCache; |
| import org.apache.usergrid.corepersistence.index.*; |
| import org.apache.usergrid.corepersistence.rx.impl.AllEntityIdsObservable; |
| import org.apache.usergrid.corepersistence.util.CpEntityMapUtils; |
| import org.apache.usergrid.corepersistence.util.CpNamingUtils; |
| import org.apache.usergrid.corepersistence.util.ObjectJsonSerializer; |
| import org.apache.usergrid.persistence.collection.EntityCollectionManager; |
| import org.apache.usergrid.persistence.collection.EntityCollectionManagerFactory; |
| import org.apache.usergrid.persistence.collection.EntitySet; |
| import org.apache.usergrid.persistence.collection.serialization.impl.EntitySetImpl; |
| import org.apache.usergrid.persistence.core.scope.ApplicationScope; |
| import org.apache.usergrid.persistence.graph.GraphManager; |
| import org.apache.usergrid.persistence.graph.SearchByEdgeType; |
| import org.apache.usergrid.persistence.graph.impl.SimpleSearchByEdgeType; |
| import org.apache.usergrid.persistence.map.MapManager; |
| import org.apache.usergrid.persistence.map.MapManagerFactory; |
| import org.apache.usergrid.persistence.map.MapScope; |
| import org.apache.usergrid.persistence.map.impl.MapScopeImpl; |
| import org.apache.usergrid.persistence.model.entity.Entity; |
| |
| import org.apache.usergrid.persistence.model.entity.Id; |
| import org.apache.usergrid.utils.InflectionUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import rx.Observable; |
| import rx.schedulers.Schedulers; |
| |
| |
| import java.io.*; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipOutputStream; |
| |
| |
| @Singleton |
| public class ExportServiceImpl implements ExportService { |
| |
| private static final Logger logger = LoggerFactory.getLogger( ExportServiceImpl.class ); |
| |
| private final AllEntityIdsObservable allEntityIdsObservable; |
| private final EntityCollectionManagerFactory entityCollectionManagerFactory; |
| private final ManagerCache managerCache; |
| private final ObjectJsonSerializer jsonSerializer = ObjectJsonSerializer.INSTANCE; |
| private final int exportVersion = 1; |
| private final String keyTotalEntityCount = "__totalEntityCount__"; |
| |
| |
| |
| @Inject |
| public ExportServiceImpl(final AllEntityIdsObservable allEntityIdsObservable, |
| final ManagerCache managerCache, |
| final EntityCollectionManagerFactory entityCollectionManagerFactory) { |
| this.allEntityIdsObservable = allEntityIdsObservable; |
| this.entityCollectionManagerFactory = entityCollectionManagerFactory; |
| this.managerCache = managerCache; |
| } |
| |
| |
| @Override |
| public void export(final ExportRequestBuilder exportRequestBuilder, OutputStream stream) throws RuntimeException { |
| |
| final ZipOutputStream zipOutputStream = new ZipOutputStream(stream); |
| zipOutputStream.setLevel(9); // best compression to reduce the amount of data to stream over the wire |
| |
| final ApplicationScope appScope = exportRequestBuilder.getApplicationScope().get(); |
| final Observable<ApplicationScope> applicationScopes = Observable.just(appScope); |
| |
| final EntityCollectionManager ecm = entityCollectionManagerFactory.createCollectionManager(appScope); |
| |
| GraphManager gm = managerCache.getGraphManager( appScope ); |
| |
| final AtomicInteger entityFileCount = new AtomicInteger(); // entities are batched into files |
| final AtomicInteger connectionCount = new AtomicInteger(); |
| final Map<String, AtomicInteger> collectionStats = new HashMap<>(); |
| collectionStats.put(keyTotalEntityCount, new AtomicInteger()); |
| final Map<String, Object> infoMap = new HashMap<>(); |
| infoMap.put("application", appScope.getApplication().getUuid().toString()); |
| infoMap.put("exportVersion", exportVersion); |
| infoMap.put("exportStarted", System.currentTimeMillis()); |
| |
| logger.info("Starting export of application: {}", appScope.getApplication().getUuid().toString()); |
| |
| allEntityIdsObservable.getEdgesToEntities( applicationScopes, Optional.absent(), Optional.absent() ) |
| .buffer(500) |
| .map( edgeScopes -> { |
| |
| List<Id> entityIds = new ArrayList<>(); |
| edgeScopes.forEach( edgeScope -> { |
| if (edgeScope.getEdge().getTargetNode() != null) { |
| logger.debug("adding entity to list: {}", edgeScope.getEdge().getTargetNode()); |
| entityIds.add(edgeScope.getEdge().getTargetNode()); |
| } |
| }); |
| |
| return entityIds; |
| |
| }) |
| .flatMap( entityIds -> { |
| |
| logger.debug("entityIds: {}", entityIds); |
| |
| // batch load the entities |
| EntitySet entitySet = ecm.load(entityIds).toBlocking().lastOrDefault(new EntitySetImpl(0)); |
| |
| final String filenameWithPath = "entities/entities." + entityFileCount.get() + ".json"; |
| |
| try { |
| |
| logger.debug("adding zip entry: {}", filenameWithPath); |
| zipOutputStream.putNextEntry(new ZipEntry(filenameWithPath)); |
| |
| entitySet.getEntities().forEach(mvccEntity -> { |
| |
| if (mvccEntity.getEntity().isPresent()) { |
| Map entityMap = CpEntityMapUtils.toMap(mvccEntity.getEntity().get()); |
| |
| try { |
| |
| collectionStats.putIfAbsent(mvccEntity.getId().getType(), new AtomicInteger()); |
| collectionStats.get(mvccEntity.getId().getType()).incrementAndGet(); |
| collectionStats.get(keyTotalEntityCount).incrementAndGet(); |
| |
| logger.debug("writing and flushing entity {} to zip stream for file: {}", mvccEntity.getId().getUuid().toString(), filenameWithPath); |
| zipOutputStream.write(jsonSerializer.toString(entityMap).getBytes()); |
| zipOutputStream.write("\n".getBytes()); |
| zipOutputStream.flush(); // entities can be large, flush after each |
| |
| |
| } catch (IOException e) { |
| logger.warn("unable to write entry in zip stream for entityId: {}", mvccEntity.getId()); |
| throw new RuntimeException("Unable to export data. Error writing to stream."); |
| |
| } |
| } else { |
| logger.warn("entityId {} did not have corresponding entity, not writing", mvccEntity.getId()); |
| } |
| }); |
| |
| zipOutputStream.closeEntry(); |
| entityFileCount.incrementAndGet(); |
| |
| }catch (IOException e){ |
| throw new RuntimeException("Unable to export data. Error writing to stream."); |
| } |
| |
| return Observable.from(entitySet.getEntities()); |
| |
| }) |
| .doOnNext( mvccEntity -> { |
| |
| gm.getEdgeTypesFromSource(CpNamingUtils.createConnectionTypeSearch(mvccEntity.getId())) |
| .flatMap(emittedEdgeType -> { |
| |
| logger.debug("loading edges of type {} from node {}", emittedEdgeType, mvccEntity.getId()); |
| return gm.loadEdgesFromSource(new SimpleSearchByEdgeType(mvccEntity.getId(), |
| emittedEdgeType, Long.MAX_VALUE, SearchByEdgeType.Order.DESCENDING, Optional.absent())); |
| |
| }) |
| .doOnNext(markedEdge -> { |
| |
| if (!markedEdge.isDeleted() && !markedEdge.isTargetNodeDeleted() && markedEdge.getTargetNode() != null ) { |
| |
| // doing the load to just again make sure bad connections are not exported |
| Entity entity = ecm.load(markedEdge.getTargetNode()).toBlocking().lastOrDefault(null); |
| |
| if (entity != null) { |
| |
| try { |
| // since a single stream is being written, and connecitons are loaded per entity, |
| // it cannot easily be batched eventlyinto files so write them separately |
| final String filenameWithPath = "connections/" + |
| markedEdge.getSourceNode().getUuid().toString()+"_" + |
| CpNamingUtils.getConnectionNameFromEdgeName(markedEdge.getType()) + "_" + |
| markedEdge.getTargetNode().getUuid().toString() + ".json"; |
| |
| logger.debug("adding zip entry: {}", filenameWithPath); |
| zipOutputStream.putNextEntry(new ZipEntry(filenameWithPath)); |
| |
| |
| final Map<String,String> connectionMap = new HashMap<String,String>(1){{ |
| put("sourceNodeUUID", markedEdge.getSourceNode().getUuid().toString() ); |
| put("relationship", CpNamingUtils.getConnectionNameFromEdgeName(markedEdge.getType()) ); |
| put("targetNodeUUID", markedEdge.getTargetNode().getUuid().toString()); |
| }}; |
| |
| logger.debug("writing and flushing connection to zip stream: {}", jsonSerializer.toString(connectionMap).getBytes()); |
| zipOutputStream.write(jsonSerializer.toString(connectionMap).getBytes()); |
| |
| zipOutputStream.closeEntry(); |
| zipOutputStream.flush(); |
| |
| connectionCount.incrementAndGet(); |
| |
| |
| } catch (IOException e) { |
| logger.warn("Unable to create entry in zip export for edge {}", markedEdge.toString()); |
| throw new RuntimeException("Unable to export data. Error writing to stream."); |
| } |
| } else { |
| logger.warn("Exported connection has a missing target node, not creating connection in export. Edge: {}", markedEdge); |
| } |
| } |
| |
| }).toBlocking().lastOrDefault(null); |
| }) |
| .doOnCompleted(() -> { |
| |
| infoMap.put("exportFinished", System.currentTimeMillis()); |
| |
| |
| try { |
| |
| zipOutputStream.putNextEntry(new ZipEntry("metadata.json")); |
| zipOutputStream.write(jsonSerializer.toString(infoMap).getBytes()); |
| zipOutputStream.closeEntry(); |
| |
| zipOutputStream.putNextEntry(new ZipEntry("stats.json")); |
| Map<String, Object> stats = new HashMap<>(); |
| stats.put("totalEntities", collectionStats.get(keyTotalEntityCount).get()); |
| stats.put("totalConnections", connectionCount.get()); |
| collectionStats.remove(keyTotalEntityCount); |
| stats.put("collectionCounts", new HashMap<String, Integer>(collectionStats.size()){{ |
| collectionStats.forEach( (collection,count) -> { |
| put(InflectionUtils.pluralize(collection),count.get()); |
| }); |
| }}); |
| zipOutputStream.write(jsonSerializer.toString(stats).getBytes()); |
| zipOutputStream.closeEntry(); |
| |
| logger.debug("closing zip stream"); |
| zipOutputStream.close(); |
| |
| logger.info("Finished export of application: {}", appScope.getApplication().getUuid().toString()); |
| |
| |
| } catch (IOException e) { |
| throw new RuntimeException("Unable to export data due to inability to close zip stream."); |
| } |
| |
| }) |
| .subscribeOn( Schedulers.io() ).toBlocking().lastOrDefault(null); |
| } |
| |
| |
| @Override |
| public ExportRequestBuilder getBuilder() { |
| return new ExportRequestBuilderImpl(); |
| } |
| |
| } |
| |
| |
