| 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.recevier.pattern; |
| 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.recevier.StreamReceiver; |
| 24 | |
| 25 | import java.util.List; |
| 26 | import java.util.concurrent.ThreadPoolExecutor; |
| 27 | |
| 28 | public class PatternStreamReceiver implements StreamReceiver, StreamElement, Runnable { |
| 29 | |
| 30 | // private List<SingleStream> inputStreamList; |
| 31 | private String streamId; |
| 32 | private ThreadPoolExecutor threadPoolExecutor; |
| 33 | private SchedulerQueue<StreamEvent> inputQueue = new SchedulerQueue<StreamEvent>(); |
| 34 | private List<PatternSingleStreamReceiver> patternSingleStreamReceiverList; |
| 35 | private int patternSingleStreamReceiverListSize; |
| 36 | |
| 37 | public PatternStreamReceiver(String streamId, |
| 38 | List<PatternSingleStreamReceiver> patternSingleStreamReceiverList, |
| 39 | ThreadPoolExecutor threadPoolExecutor) { |
| 40 | this.streamId = streamId; |
| 41 | this.patternSingleStreamReceiverList = patternSingleStreamReceiverList; |
| 42 | this.threadPoolExecutor = threadPoolExecutor; |
| 43 | this.patternSingleStreamReceiverListSize = patternSingleStreamReceiverList.size(); |
| 44 | } |
| 45 | |
| 46 | @Override |
| 47 | public void receive(StreamEvent streamEvent) throws InterruptedException { |
| 48 | // //System.out.println(event); |
| 49 | if (!inputQueue.put(streamEvent)) { |
| 50 | threadPoolExecutor.submit(this); |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | @Override |
| 55 | public void run() { |
| 56 | int eventCounter = 0; |
| 57 | while (true) { |
| 58 | StreamEvent streamEvent = inputQueue.poll(); |
| 59 | if (streamEvent == null) { |
| 60 | break; |
| 61 | } else if (eventCounter > 10) { |
| 62 | threadPoolExecutor.submit(this); |
| 63 | break; |
| 64 | } |
| 65 | eventCounter++; |
| 66 | try { |
| 67 | //in reverse order to execute the later states first to overcome to dependencies of count states |
| 68 | for (int i = patternSingleStreamReceiverListSize - 1; i >= 0; i--) { |
| 69 | patternSingleStreamReceiverList.get(i).moveNextEventsToCurrentEvents(); |
| 70 | } |
| 71 | for (int i = patternSingleStreamReceiverListSize - 1; i >= 0; i--) { |
| 72 | patternSingleStreamReceiverList.get(i).receive(streamEvent); |
| 73 | } |
| 74 | } catch (Throwable e) { |
| 75 | e.printStackTrace(); |
| 76 | } |
| 77 | |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | public String getStreamId() { |
| 82 | return streamId; |
| 83 | } |
| 84 | |
| 85 | @Override |
| 86 | public SchedulerQueue<StreamEvent> getWindow() { |
| 87 | return null; |
| 88 | } |
| 89 | |
| 90 | |
| 91 | } |