| /* |
| * 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.rx.impl; |
| |
| |
| |
| |
| import com.google.common.base.Optional; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| |
| import org.apache.usergrid.persistence.collection.serialization.impl.migration.EntityIdScope; |
| import org.apache.usergrid.persistence.core.scope.ApplicationScope; |
| import org.apache.usergrid.persistence.graph.Edge; |
| import org.apache.usergrid.persistence.graph.GraphManager; |
| import org.apache.usergrid.persistence.graph.GraphManagerFactory; |
| import org.apache.usergrid.persistence.graph.serialization.EdgesObservable; |
| import org.apache.usergrid.persistence.graph.serialization.TargetIdObservable; |
| import org.apache.usergrid.persistence.model.entity.Id; |
| |
| import rx.Observable; |
| |
| |
| /** |
| * An implementation that will provide all entityId scopes in the system |
| */ |
| @Singleton |
| public class AllEntityIdsObservableImpl implements AllEntityIdsObservable { |
| private final GraphManagerFactory graphManagerFactory; |
| private final TargetIdObservable targetIdObservable; |
| private final EdgesObservable edgesObservable; |
| |
| |
| @Inject |
| public AllEntityIdsObservableImpl( final GraphManagerFactory graphManagerFactory, |
| final TargetIdObservable targetIdObservable, |
| final EdgesObservable edgesObservable ) { |
| this.graphManagerFactory = graphManagerFactory; |
| this.targetIdObservable = targetIdObservable; |
| this.edgesObservable = edgesObservable; |
| } |
| |
| |
| @Override |
| public Observable<EntityIdScope> getEntities( final Observable<ApplicationScope> appScopes ) { |
| |
| return appScopes.flatMap( applicationScope -> { |
| final GraphManager gm = graphManagerFactory.createEdgeManager( applicationScope ); |
| final Id applicationId = applicationScope.getApplication(); |
| |
| //load all nodes that are targets of our application node. I.E. |
| // entities that have been saved |
| final Observable<Id> entityNodes = targetIdObservable.getTargetNodes( gm, applicationId ); |
| |
| |
| //create our application node to emit since it's an entity as well |
| final Observable<Id> applicationNode = Observable.just( applicationId ); |
| |
| //merge both the specified application node and the entity node |
| // so they all get used |
| return Observable.merge( applicationNode, entityNodes ). |
| map( id -> new EntityIdScope( applicationScope, id ) ); |
| } ); |
| } |
| |
| |
| @Override |
| public Observable<EdgeScope> getEdgesToEntities( final Observable<ApplicationScope> appScopes, final Optional<String> edgeType, final Optional<Edge> lastEdge) { |
| |
| return appScopes.flatMap( applicationScope -> { |
| final GraphManager gm = graphManagerFactory.createEdgeManager( applicationScope ); |
| |
| return edgesObservable.edgesFromSourceDescending( gm, applicationScope.getApplication(), edgeType, lastEdge ) |
| .map( edge -> new EdgeScope(applicationScope, edge )); |
| } ); |
| } |
| } |