| /** |
| * 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 com.datatorrent.lib.appdata.query; |
| |
| import java.util.Map; |
| |
| import org.apache.commons.lang3.mutable.MutableLong; |
| |
| import com.google.common.collect.Maps; |
| |
| import com.datatorrent.lib.appdata.query.QueueList.QueueListNode; |
| import com.datatorrent.lib.appdata.schemas.Query; |
| |
| /** |
| * This {@link QueueManager} behaves like {@link WindowEndQueueManager} except that if another query is added to the queue with |
| * the same query id as an existing query in the queue, the existing query is replaced with the new query. |
| * @param <QUERY> The type of queries kept in the queue. |
| * @param <META_QUERY> The type of query meta data kept in the queue. |
| * @since 3.0.0 |
| */ |
| public class AppDataWindowEndQueueManager<QUERY extends Query, META_QUERY> extends WindowEndQueueManager<QUERY, META_QUERY> |
| { |
| /** |
| * A map from query IDs to queue nodes. |
| */ |
| private final Map<String, QueueListNode<QueryBundle<QUERY, META_QUERY, MutableLong>>> queryIDToNode = Maps.newHashMap(); |
| |
| public AppDataWindowEndQueueManager() |
| { |
| } |
| |
| @Override |
| public boolean enqueue(QUERY query, META_QUERY metaQuery, MutableLong context) |
| { |
| if (context != null) { |
| query.setCountdown(context.getValue()); |
| } |
| |
| if (query.isOneTime()) { |
| return super.enqueue(query, metaQuery, new MutableLong(1L)); |
| } else { |
| return super.enqueue(query, metaQuery, new MutableLong(query.getCountdown())); |
| } |
| } |
| |
| @Override |
| public void addedNode(QueueListNode<QueryBundle<QUERY, META_QUERY, MutableLong>> queryQueueable) |
| { |
| queryIDToNode.put(queryQueueable.getPayload().getQuery().getId(), queryQueueable); |
| } |
| |
| @Override |
| public void removedNode(QueueListNode<QueryBundle<QUERY, META_QUERY, MutableLong>> queryQueueable) |
| { |
| queryIDToNode.remove(queryQueueable.getPayload().getQuery().getId()); |
| } |
| |
| @Override |
| public boolean addingFilter(QueryBundle<QUERY, META_QUERY, MutableLong> queryBundle) |
| { |
| QueueListNode<QueryBundle<QUERY, META_QUERY, MutableLong>> queryNode = |
| queryIDToNode.get(queryBundle.getQuery().getId()); |
| |
| if (queryNode == null) { |
| return true; |
| } |
| |
| queryNode.setPayload(queryBundle); |
| |
| return false; |
| } |
| } |