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 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package com.oracle.truffle.api.instrument;

import com.oracle.truffle.api.*;

/**
 * A client of the instrumentation framework that requests event notifications from the language
 * engine when sources are loaded.
 * <p>
 * <strong>Disclaimer:</strong> experimental interface under development.
 */
public interface SourceListener {

    /**
     * The guest language runtime is starting to load a source. Care should be taken to ensure that
     * under any circumstance there is always a following call to {@link #loadEnding(Source)} with
     * the same argument.
     */
    void loadStarting(Source source);

    /**
     * The guest language runtime has finished loading a source. Care should be taken to ensure that
     * under any circumstance there is always a prior call to {@link #loadStarting(Source)} with the
     * same argument.
     */
    void loadEnding(Source source);

}