| 1 | /* |
| 2 | * Copyright (c) 2005-2010, WSO2 Inc. (http://www.wso2.org) All Rights Reserved. |
| 3 | * |
| 4 | * WSO2 Inc. licenses this file to you under the Apache License, |
| 5 | * Version 2.0 (the "License"); you may not use this file except |
| 6 | * in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, |
| 12 | * software distributed under the License is distributed on an |
| 13 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 14 | * KIND, either express or implied. See the License for the |
| 15 | * specific language governing permissions and limitations |
| 16 | * under the License. |
| 17 | */ |
| 18 | package org.wso2.siddhi.core.stream.handler.window; |
| 19 | |
| 20 | import org.wso2.siddhi.core.event.StreamEvent; |
| 21 | import org.wso2.siddhi.core.util.SchedulerQueue; |
| 22 | import org.wso2.siddhi.core.stream.StreamElement; |
| 23 | import org.wso2.siddhi.core.stream.StreamProcessor; |
| 24 | import org.wso2.siddhi.core.stream.handler.StreamHandler; |
| 25 | import org.wso2.siddhi.query.api.query.QueryEventStream; |
| 26 | |
| 27 | import java.util.List; |
| 28 | import java.util.concurrent.Executors; |
| 29 | import java.util.concurrent.ScheduledExecutorService; |
| 30 | |
| 31 | public abstract class WindowHandler implements StreamHandler{ |
| 32 | private List<QueryEventStream> queryEventStreamList; |
| 33 | private StreamProcessor nextPreStreamFlowProcessor; |
| 34 | private ScheduledExecutorService eventRemoverScheduler = Executors.newScheduledThreadPool(1); |
| 35 | private SchedulerQueue<StreamEvent> window = new SchedulerQueue<StreamEvent>(); |
| 36 | private StreamElement prevStreamElement; |
| 37 | |
| 38 | @Override |
| 39 | public void setNext(StreamProcessor nextPreStreamFlowProcessor) { |
| 40 | this.nextPreStreamFlowProcessor = nextPreStreamFlowProcessor; |
| 41 | } |
| 42 | |
| 43 | |
| 44 | protected List<QueryEventStream> getQueryEventStreamList() { |
| 45 | return queryEventStreamList; |
| 46 | } |
| 47 | |
| 48 | // protected StreamHandler getNextStreamHandler() { |
| 49 | // return nextStreamHandler; |
| 50 | // } |
| 51 | |
| 52 | |
| 53 | protected StreamProcessor getNextPreStreamFlowProcessor() { |
| 54 | return nextPreStreamFlowProcessor; |
| 55 | } |
| 56 | |
| 57 | protected ScheduledExecutorService getEventRemoverScheduler() { |
| 58 | return eventRemoverScheduler; |
| 59 | } |
| 60 | |
| 61 | public SchedulerQueue<StreamEvent> getWindow() { |
| 62 | return window; |
| 63 | } |
| 64 | |
| 65 | @Override |
| 66 | public void setPrevious(StreamElement streamElement) { |
| 67 | this.prevStreamElement = streamElement; |
| 68 | } |
| 69 | |
| 70 | @Override |
| 71 | public String getStreamId() { |
| 72 | return prevStreamElement.getStreamId(); |
| 73 | } |
| 74 | |
| 75 | public abstract void setParameters(Object[] parameters); |
| 76 | } |