| /* |
| * Copyright 2014 The Apache Software Foundation. |
| * |
| * Licensed 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; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.usergrid.corepersistence.util.CpNamingUtils; |
| import org.apache.usergrid.persistence.Entity; |
| import org.apache.usergrid.persistence.EntityRef; |
| import org.apache.usergrid.persistence.SimpleEntityRef; |
| 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.SearchByEdgeType; |
| import org.apache.usergrid.persistence.graph.impl.SimpleSearchByEdgeType; |
| import org.apache.usergrid.persistence.graph.impl.SimpleSearchEdgeType; |
| import org.apache.usergrid.persistence.model.entity.Id; |
| import org.apache.usergrid.persistence.model.entity.SimpleId; |
| |
| import com.google.common.base.Optional; |
| |
| import rx.Observable; |
| import rx.schedulers.Schedulers; |
| |
| import static org.apache.usergrid.corepersistence.util.CpNamingUtils.getNameFromEdgeType; |
| |
| |
| /** |
| * Takes a visitor to all collections and entities. |
| */ |
| public class CpWalker { |
| |
| private static final Logger logger = LoggerFactory.getLogger( CpWalker.class ); |
| |
| |
| |
| /** |
| * Wait the set amount of time between successive writes. |
| * @param |
| */ |
| public CpWalker(){ |
| |
| } |
| |
| |
| public void walkCollections(final CpEntityManager em, final EntityRef start, |
| String collectionName, boolean reverse, final CpVisitor visitor) throws Exception { |
| |
| if(start != null) { |
| doWalkCollections( |
| em, collectionName, reverse, new SimpleId(start.getUuid(), start.getType()), visitor); |
| } |
| } |
| |
| |
| private void doWalkCollections( |
| final CpEntityManager em, |
| final String collectionName, |
| final boolean reverse, |
| final Id applicationId, |
| final CpVisitor visitor ) { |
| |
| final ApplicationScope applicationScope = em.getApplicationScope(); |
| |
| final GraphManager gm = em.getManagerCache().getGraphManager( applicationScope ); |
| |
| if (logger.isDebugEnabled()) { |
| logger.debug("Loading edges types from {}:{}\n scope {}:{}", |
| applicationId.getType(), |
| applicationId.getUuid(), |
| applicationScope.getApplication().getType(), |
| applicationScope.getApplication().getUuid() |
| ); |
| } |
| |
| final SearchByEdgeType.Order order; |
| if ( reverse ) { |
| order = SearchByEdgeType.Order.ASCENDING; |
| } else { |
| order = SearchByEdgeType.Order.DESCENDING; |
| } |
| |
| final String edgeType; |
| if ( collectionName == null ) { |
| // only search edge types that end with collections suffix |
| edgeType = CpNamingUtils.EDGE_COLL_PREFIX; |
| |
| } else { |
| // only search edges to one collection |
| edgeType = CpNamingUtils.getEdgeTypeFromCollectionName( collectionName ); |
| } |
| |
| Observable<Edge> edges = gm.getEdgeTypesFromSource( |
| new SimpleSearchEdgeType( applicationId, edgeType, null ) ).flatMap( emittedEdgeType -> { |
| |
| if (logger.isDebugEnabled()) { |
| logger.debug("Loading edges of type {} from node {}", edgeType, applicationId); |
| } |
| |
| return gm.loadEdgesFromSource( |
| new SimpleSearchByEdgeType( applicationId, emittedEdgeType, Long.MAX_VALUE, order, Optional.absent() ) ); |
| } ).flatMap( edge -> { |
| //run each edge through it's own scheduler, up to 100 at a time |
| return Observable.just( edge ).doOnNext( edgeValue -> { |
| logger.info( "Re-indexing edge {}", edgeValue ); |
| |
| EntityRef targetNodeEntityRef = |
| new SimpleEntityRef( edgeValue.getTargetNode().getType(), edgeValue.getTargetNode().getUuid() ); |
| |
| Entity entity; |
| try { |
| entity = em.get( targetNodeEntityRef ); |
| } |
| catch ( Exception ex ) { |
| logger.error( "Error getting sourceEntity {}:{}, continuing", targetNodeEntityRef.getType(), |
| targetNodeEntityRef.getUuid() ); |
| return; |
| } |
| if ( entity == null ) { |
| return; |
| } |
| String collName = getNameFromEdgeType( edgeValue.getType() ); |
| visitor.visitCollectionEntry( em, collName, entity ); |
| } ).subscribeOn( Schedulers.io() ); |
| }, 100 ); |
| |
| // wait for it to complete |
| edges.toBlocking().lastOrDefault( null ); // end foreach on edges |
| } |
| } |