jdk/src/jdk.attach/share/classes/com/sun/tools/attach/AgentInitializationException.java

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 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package com.sun.tools.attach;

/**
 * The exception thrown when an agent fails to initialize in the target
 * Java virtual machine.
 *
 * <p> This exception is thrown by
 * {@link com.sun.tools.attach.VirtualMachine#loadAgent VirtualMachine.loadAgent},
 * {@link com.sun.tools.attach.VirtualMachine#loadAgentLibrary
 * VirtualMachine.loadAgentLibrary},
 * {@link com.sun.tools.attach.VirtualMachine#loadAgentPath VirtualMachine.loadAgentPath}
 * methods if an agent, or agent library, cannot be initialized.
 * When thrown by {@code VirtualMachine.loadAgentLibrary}, or
 * {@code VirtualMachine.loadAgentPath} then the exception encapsulates
 * the error returned by the agent's {@code Agent_OnAttach} function.
 * This error code can be obtained by invoking the {@link #returnValue() returnValue} method.
 */
@jdk.Exported
public class AgentInitializationException extends Exception {

    /** use serialVersionUID for interoperability */
    static final long serialVersionUID = -1508756333332806353L;

    private int returnValue;

    /**
     * Constructs an {@code AgentInitializationException} with
     * no detail message.
     */
    public AgentInitializationException() {
        super();
        this.returnValue = 0;
    }

    /**
     * Constructs an {@code AgentInitializationException} with
     * the specified detail message.
     *
     * @param   s   the detail message.
     */
    public AgentInitializationException(String s) {
        super(s);
        this.returnValue = 0;
    }

    /**
     * Constructs an {@code AgentInitializationException} with
     * the specified detail message and the return value from the
     * execution of the agent's {@code Agent_OnAttach} function.
     *
     * @param   s               the detail message.
     * @param   returnValue     the return value
     */
    public AgentInitializationException(String s, int returnValue) {
        super(s);
        this.returnValue = returnValue;
    }

    /**
     * If the exception was created with the return value from the agent
     * {@code Agent_OnAttach} function then this returns that value,
     * otherwise returns {@code 0}.
     *
     * @return  the return value
     */
    public int returnValue() {
        return returnValue;
    }

}