| 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.ComplexEvent; |
| 21 | import org.wso2.siddhi.core.event.Event; |
| 22 | import org.wso2.siddhi.core.event.ListEvent; |
| 23 | import org.wso2.siddhi.core.event.StreamEvent; |
| 24 | import org.wso2.siddhi.core.event.in.InEvent; |
| 25 | import org.wso2.siddhi.core.event.in.InListEvent; |
| 26 | import org.wso2.siddhi.core.event.in.InStream; |
| 27 | import org.wso2.siddhi.core.event.remove.RemoveEvent; |
| 28 | import org.wso2.siddhi.core.event.remove.RemoveListEvent; |
| 29 | import org.wso2.siddhi.core.event.remove.RemoveStream; |
| 30 | |
| 31 | import java.util.ArrayList; |
| 32 | import java.util.Collections; |
| 33 | import java.util.List; |
| 34 | import java.util.concurrent.TimeUnit; |
| 35 | |
| 36 | public class TimeBatchWindowHandler extends WindowHandler implements Runnable { |
| 37 | |
| 38 | long timeToKeep; |
| 39 | List<Event> newEventList = new ArrayList<Event>(); |
| 40 | List<Event> oldEventList; |
| 41 | |
| 42 | @Override |
| 43 | public void setParameters(Object[] parameters) { |
| 44 | if (parameters[0] instanceof Integer) { |
| 45 | timeToKeep = (Integer) parameters[0]; |
| 46 | } else { |
| 47 | timeToKeep = (Long) parameters[0]; |
| 48 | } |
| 49 | getEventRemoverScheduler().schedule(this, timeToKeep, TimeUnit.MILLISECONDS); |
| 50 | } |
| 51 | |
| 52 | @Override |
| 53 | public void process(ComplexEvent complexEvent) { |
| 54 | if (complexEvent instanceof StreamEvent) { |
| 55 | if (complexEvent instanceof InStream) { |
| 56 | if (complexEvent instanceof Event) { |
| 57 | newEventList.add(((Event) complexEvent)); |
| 58 | } else {//ListEvent |
| 59 | Collections.addAll(newEventList, ((ListEvent) complexEvent).getEvents()); |
| 60 | } |
| 61 | } else { |
| 62 | if (complexEvent instanceof Event) { |
| 63 | newEventList.add(new InEvent((Event) complexEvent)); |
| 64 | } else {//ListEvent |
| 65 | for (Event aEvent : ((ListEvent) complexEvent).getEvents()) { |
| 66 | newEventList.add(new InEvent(aEvent)); |
| 67 | } |
| 68 | } |
| 69 | } |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | @Override |
| 74 | public void run() { |
| 75 | oldEventList = new ArrayList<Event>(); |
| 76 | while (true) { |
| 77 | StreamEvent event = getWindow().poll(); |
| 78 | if (event == null) { |
| 79 | getEventRemoverScheduler().schedule(this, timeToKeep, TimeUnit.MILLISECONDS); |
| 80 | |
| 81 | sendRemoveEvents(oldEventList); |
| 82 | |
| 83 | oldEventList = newEventList; |
| 84 | newEventList = new ArrayList<Event>(); |
| 85 | |
| 86 | sendInEvents(oldEventList); |
| 87 | |
| 88 | for (Event aEvent : oldEventList) { |
| 89 | try { |
| 90 | getWindow().put(aEvent); |
| 91 | } catch (InterruptedException e) { |
| 92 | e.printStackTrace(); |
| 93 | } |
| 94 | } |
| 95 | oldEventList = null; |
| 96 | |
| 97 | break; |
| 98 | } |
| 99 | if (event instanceof RemoveStream) { |
| 100 | if (event instanceof Event) { |
| 101 | oldEventList.add(((Event) event)); |
| 102 | } else {//ListEvent |
| 103 | Collections.addAll(oldEventList, ((ListEvent) event).getEvents()); |
| 104 | } |
| 105 | } else { |
| 106 | if (event instanceof Event) { |
| 107 | oldEventList.add(new RemoveEvent((Event) event,System.currentTimeMillis())); |
| 108 | } else {//ListEvent |
| 109 | for (Event aEvent : ((ListEvent) event).getEvents()) { |
| 110 | oldEventList.add(new RemoveEvent(aEvent,System.currentTimeMillis())); |
| 111 | } |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | private void sendInEvents(List<Event> eventList) { |
| 118 | int size = eventList.size(); |
| 119 | if (size > 1) { |
| 120 | getNextPreStreamFlowProcessor().process(new InListEvent((eventList.toArray(new Event[size])))); |
| 121 | } else if (size == 1) { |
| 122 | Event aEvent = eventList.get(0); |
| 123 | getNextPreStreamFlowProcessor().process(new InEvent(aEvent)); |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | |
| 128 | private void sendRemoveEvents(List<Event> eventList) { |
| 129 | int size = eventList.size(); |
| 130 | if (size > 1) { |
| 131 | getNextPreStreamFlowProcessor().process(new RemoveListEvent((eventList.toArray(new Event[size])), System.currentTimeMillis())); |
| 132 | } else if (size == 1) { |
| 133 | Event aEvent = eventList.get(0); |
| 134 | getNextPreStreamFlowProcessor().process(new RemoveEvent(aEvent, System.currentTimeMillis())); |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | |
| 139 | } |