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EventBuilder.java
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EventBuilder.java
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/*
* 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.asyncevents;
import java.util.List;
import org.apache.usergrid.corepersistence.index.EntityIndexOperation;
import org.apache.usergrid.persistence.collection.MvccLogEntry;
import org.apache.usergrid.persistence.core.scope.ApplicationScope;
import org.apache.usergrid.persistence.graph.Edge;
import org.apache.usergrid.persistence.index.impl.IndexOperationMessage;
import org.apache.usergrid.persistence.model.entity.Entity;
import org.apache.usergrid.persistence.model.entity.Id;
import rx.Observable;
/**
* Interface for constructing an observable stream to perform asynchonous events
*/
public interface EventBuilder {
/**
* Return the cold observable of the new edge operation
* @param applicationScope
* @param entity
* @param newEdge
* @return
*/
Observable<IndexOperationMessage> buildNewEdge( ApplicationScope applicationScope, Entity entity, Edge newEdge );
/**
* Return the cold observable of the deleted edge operations
* @param applicationScope
* @param edge
* @return
*/
Observable<IndexOperationMessage> buildDeleteEdge( ApplicationScope applicationScope, Edge edge );
/**
* Return a ben with 2 obervable streams for entity delete.
* @param applicationScope
* @param entityId
* @return
*/
EntityDeleteResults buildEntityDelete(ApplicationScope applicationScope, Id entityId );
/**
* Re-index an entity in the scope provided
* @param entityIndexOperation
* @return
*/
Observable<IndexOperationMessage> buildEntityIndex( EntityIndexOperation entityIndexOperation );
/**
* A bean to hold both our observables so the caller can choose the subscription mechanism. Note that
* indexOperationMessages should be subscribed and completed BEFORE the getEntitiesDeleted is subscribed
*/
final class EntityDeleteResults {
private final Observable<IndexOperationMessage> indexOperationMessageObservable;
private final Observable<List<MvccLogEntry>> entitiesDeleted;
private final Observable<Id> compactedNode;
public EntityDeleteResults( final Observable<IndexOperationMessage> indexOperationMessageObservable,
final Observable<List<MvccLogEntry>> entitiesDeleted,
final Observable<Id> compactedNode) {
this.indexOperationMessageObservable = indexOperationMessageObservable;
this.entitiesDeleted = entitiesDeleted;
this.compactedNode = compactedNode;
}
public Observable<IndexOperationMessage> getIndexObservable() {
return indexOperationMessageObservable;
}
public Observable<List<MvccLogEntry>> getEntitiesDeleted() {
return entitiesDeleted;
}
public Observable<Id> getCompactedNode() {
return compactedNode;
}
}
}