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annotate truffle/com.oracle.truffle.api.vm/src/com/oracle/truffle/api/vm/EventConsumer.java @ 22173:dcb70d90c11d

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author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Mon, 21 Sep 2015 11:21:03 +0200
parents b31dcacfc8ff
children
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1 /*
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2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.vm;
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26
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27 import com.oracle.truffle.api.TruffleLanguage;
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28 import com.oracle.truffle.api.debug.ExecutionEvent;
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29 import com.oracle.truffle.api.debug.SuspendedEvent;
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30
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31 /**
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32 * {@link PolyglotEngine} generates various events and delivers them to
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33 * {@link PolyglotEngine.Builder#onEvent(com.oracle.truffle.api.vm.EventConsumer) registered}
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34 * handlers. Each handler is registered for a particular type of event. Examples of events include
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35 * {@link ExecutionEvent} or {@link SuspendedEvent} useful when debugging {@link TruffleLanguage
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36 * Truffle language}s.
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37 *
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38 * @param <Event> type of event to observe and handle
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39 */
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40 public abstract class EventConsumer<Event> {
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41 final Class<Event> type;
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42
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43 /**
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44 * Creates new handler for specified event type.
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45 *
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46 * @param eventType type of events to handle
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47 */
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48 public EventConsumer(Class<Event> eventType) {
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49 this.type = eventType;
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50 }
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51
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52 /**
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53 * Called by the {@link PolyglotEngine} when event of requested type appears.
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54 *
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55 * @param event the instance of an event of the request type
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56 */
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57 protected abstract void on(Event event);
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58 }