【Java开源代码栏目提醒】:网学会员鉴于大家对Java开源代码十分关注,论文会员在此为大家搜集整理了“UnavailableException.java”一文,供大家参考学习
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*
* This source code implements specifications defined by the Java
* Community Process. In order to remain compliant with the specification
* DO NOT add / change / or delete method signatures!
*/
package javax.servlet;
/**
* Defines an exception that a servlet throws to indicate
* that it is permanently or temporarily unavailable.
*
* <p>When a servlet is permanently unavailable, something is wrong
* with the servlet, and it cannot handle
* requests until some action is taken. For example, the servlet
* might be configured incorrectly, or its state may be corrupted.
* A servlet should log both the error and the corrective action
* that is needed.
*
* <p>A servlet is temporarily unavailable if it cannot handle
* requests momentarily due to some system-wide problem. For example,
* a third-tier server might not be accessible, or there may be
* insufficient memory or disk storage to handle requests. A system
* administrator may need to take corrective action.
*
* <p>Servlet containers can safely treat both types of unavailable
* exceptions in the same way. However, treating temporary unavailability
* effectively makes the servlet container more robust. Specifically,
* the servlet container might block requests to the servlet for a period
* of time suggested by the servlet, rather than rejecting them until
* the servlet container restarts.
*
*
* @author Various
* @version $Version$
*
*/
public class UnavailableException
extends ServletException {
private Servlet servlet; // what's unavailable
private boolean permanent; // needs admin action?
private int seconds; // unavailability estimate
/**
*
* @deprecated As of
Java Servlet API 2.2, use {@link
* #UnavailableException(String)} instead.
*
* @param servlet the <code>Servlet</code> instance that is
* unavailable
*
* @param msg a <code>String</code> specifying the
* descriptive message
*
*/
public UnavailableException(Servl