| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <!-- NewPage --> |
| <html lang="en"> |
| <head> |
| <title>UnavailableException</title> |
| <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style"> |
| <script type="text/javascript" src="../../script.js"></script> |
| </head> |
| <body> |
| <script type="text/javascript"><!-- |
| try { |
| if (location.href.indexOf('is-external=true') == -1) { |
| parent.document.title="UnavailableException"; |
| } |
| } |
| catch(err) { |
| } |
| //--> |
| var methods = {"i0":42,"i1":10,"i2":10}; |
| var tabs = {65535:["t0","All Methods"],2:["t2","Instance Methods"],8:["t4","Concrete Methods"],32:["t6","Deprecated Methods"]}; |
| var altColor = "altColor"; |
| var rowColor = "rowColor"; |
| var tableTab = "tableTab"; |
| var activeTableTab = "activeTableTab"; |
| </script> |
| <noscript> |
| <div>JavaScript is disabled on your browser.</div> |
| </noscript> |
| <!-- ========= START OF TOP NAVBAR ======= --> |
| <div class="topNav"><a name="navbar.top"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.top" title="Skip navigation links">Skip navigation links</a></div> |
| <a name="navbar.top.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../overview-summary.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="navBarCell1Rev">Class</li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../index-all.html">Index</a></li> |
| <li><a href="../../help-doc.html">Help</a></li> |
| </ul> |
| </div> |
| <div class="subNav"> |
| <ul class="navList"> |
| <li><a href="../../javax/servlet/SingleThreadModel.html" title="interface in javax.servlet"><span class="typeNameLink">Prev Class</span></a></li> |
| <li><a href="../../javax/servlet/WriteListener.html" title="interface in javax.servlet"><span class="typeNameLink">Next Class</span></a></li> |
| </ul> |
| <ul class="navList"> |
| <li><a href="../../index.html?javax/servlet/UnavailableException.html" target="_top">Frames</a></li> |
| <li><a href="UnavailableException.html" target="_top">No Frames</a></li> |
| </ul> |
| <ul class="navList" id="allclasses_navbar_top"> |
| <li><a href="../../allclasses-noframe.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_top"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| </div> |
| <div> |
| <ul class="subNavList"> |
| <li>Summary: </li> |
| <li>Nested | </li> |
| <li>Field | </li> |
| <li><a href="#constructor.summary">Constr</a> | </li> |
| <li><a href="#method.summary">Method</a></li> |
| </ul> |
| <ul class="subNavList"> |
| <li>Detail: </li> |
| <li>Field | </li> |
| <li><a href="#constructor.detail">Constr</a> | </li> |
| <li><a href="#method.detail">Method</a></li> |
| </ul> |
| </div> |
| <a name="skip.navbar.top"> |
| <!-- --> |
| </a></div> |
| <!-- ========= END OF TOP NAVBAR ========= --> |
| <!-- ======== START OF CLASS DATA ======== --> |
| <div class="header"> |
| <div class="subTitle">javax.servlet</div> |
| <h2 title="Class UnavailableException" class="title">Class UnavailableException</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li>java.lang.Throwable</li> |
| <li> |
| <ul class="inheritance"> |
| <li>java.lang.Exception</li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../javax/servlet/ServletException.html" title="class in javax.servlet">javax.servlet.ServletException</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>javax.servlet.UnavailableException</li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <div class="description"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd>java.io.Serializable</dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>public class <span class="typeNameLabel">UnavailableException</span> |
| extends <a href="../../javax/servlet/ServletException.html" title="class in javax.servlet">ServletException</a></pre> |
| <div class="block">Defines an exception that a servlet or filter throws to indicate |
| that it is permanently or temporarily unavailable. |
| |
| <p>When a servlet or filter is permanently unavailable, something is wrong |
| with it, and it cannot handle |
| requests until some action is taken. For example, a servlet |
| might be configured incorrectly, or a filter's state may be corrupted. |
| The component should log both the error and the corrective action |
| that is needed. |
| |
| <p>A servlet or filter 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 or filter for a period |
| of time suggested by the exception, rather than rejecting them until |
| the servlet container restarts.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../serialized-form.html#javax.servlet.UnavailableException">Serialized Form</a></dd> |
| </dl> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.summary"> |
| <!-- --> |
| </a> |
| <h3>Constructor Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../javax/servlet/UnavailableException.html#UnavailableException-int-javax.servlet.Servlet-java.lang.String-">UnavailableException</a></span>(int seconds, |
| <a href="../../javax/servlet/Servlet.html" title="interface in javax.servlet">Servlet</a> servlet, |
| java.lang.String msg)</code> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> |
| <div class="block"><span class="deprecationComment">As of Java Servlet API 2.2, use <a href="../../javax/servlet/UnavailableException.html#UnavailableException-java.lang.String-int-"><code>UnavailableException(String, int)</code></a> instead.</span></div> |
| </div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../javax/servlet/UnavailableException.html#UnavailableException-javax.servlet.Servlet-java.lang.String-">UnavailableException</a></span>(<a href="../../javax/servlet/Servlet.html" title="interface in javax.servlet">Servlet</a> servlet, |
| java.lang.String msg)</code> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> |
| <div class="block"><span class="deprecationComment">As of Java Servlet API 2.2, use <a href="../../javax/servlet/UnavailableException.html#UnavailableException-java.lang.String-"><code>UnavailableException(String)</code></a> instead.</span></div> |
| </div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../javax/servlet/UnavailableException.html#UnavailableException-java.lang.String-">UnavailableException</a></span>(java.lang.String msg)</code> |
| <div class="block">Constructs a new exception with a descriptive |
| message indicating that the servlet is permanently |
| unavailable.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../javax/servlet/UnavailableException.html#UnavailableException-java.lang.String-int-">UnavailableException</a></span>(java.lang.String msg, |
| int seconds)</code> |
| <div class="block">Constructs a new exception with a descriptive message |
| indicating that the servlet is temporarily unavailable |
| and giving an estimate of how long it will be unavailable.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.summary"> |
| <!-- --> |
| </a> |
| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../javax/servlet/Servlet.html" title="interface in javax.servlet">Servlet</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/UnavailableException.html#getServlet--">getServlet</a></span>()</code> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> |
| <div class="block"><span class="deprecationComment">As of Java Servlet API 2.2, with no replacement. |
| |
| Returns the servlet that is reporting its unavailability.</span></div> |
| </div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/UnavailableException.html#getUnavailableSeconds--">getUnavailableSeconds</a></span>()</code> |
| <div class="block">Returns the number of seconds the servlet expects to |
| be temporarily unavailable.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/UnavailableException.html#isPermanent--">isPermanent</a></span>()</code> |
| <div class="block">Returns a <code>boolean</code> indicating |
| whether the servlet is permanently unavailable.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.javax.servlet.ServletException"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class javax.servlet.<a href="../../javax/servlet/ServletException.html" title="class in javax.servlet">ServletException</a></h3> |
| <code><a href="../../javax/servlet/ServletException.html#getRootCause--">getRootCause</a></code></li> |
| </ul> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Throwable"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.Throwable</h3> |
| <code>addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString</code></li> |
| </ul> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="UnavailableException-javax.servlet.Servlet-java.lang.String-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>UnavailableException</h4> |
| <pre>@Deprecated |
| public UnavailableException(<a href="../../javax/servlet/Servlet.html" title="interface in javax.servlet">Servlet</a> servlet, |
| java.lang.String msg)</pre> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">As of Java Servlet API 2.2, use <a href="../../javax/servlet/UnavailableException.html#UnavailableException-java.lang.String-"><code>UnavailableException(String)</code></a> instead.</span></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>servlet</code> - the <code>Servlet</code> instance that is |
| unavailable</dd> |
| <dd><code>msg</code> - a <code>String</code> specifying the |
| descriptive message</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="UnavailableException-int-javax.servlet.Servlet-java.lang.String-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>UnavailableException</h4> |
| <pre>@Deprecated |
| public UnavailableException(int seconds, |
| <a href="../../javax/servlet/Servlet.html" title="interface in javax.servlet">Servlet</a> servlet, |
| java.lang.String msg)</pre> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">As of Java Servlet API 2.2, use <a href="../../javax/servlet/UnavailableException.html#UnavailableException-java.lang.String-int-"><code>UnavailableException(String, int)</code></a> instead.</span></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>seconds</code> - an integer specifying the number of seconds |
| the servlet expects to be unavailable; if |
| zero or negative, indicates that the servlet |
| can't make an estimate</dd> |
| <dd><code>servlet</code> - the <code>Servlet</code> that is unavailable</dd> |
| <dd><code>msg</code> - a <code>String</code> specifying the descriptive |
| message, which can be written to a log file or |
| displayed for the user.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="UnavailableException-java.lang.String-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>UnavailableException</h4> |
| <pre>public UnavailableException(java.lang.String msg)</pre> |
| <div class="block">Constructs a new exception with a descriptive |
| message indicating that the servlet is permanently |
| unavailable.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>msg</code> - a <code>String</code> specifying the |
| descriptive message</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="UnavailableException-java.lang.String-int-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>UnavailableException</h4> |
| <pre>public UnavailableException(java.lang.String msg, |
| int seconds)</pre> |
| <div class="block">Constructs a new exception with a descriptive message |
| indicating that the servlet is temporarily unavailable |
| and giving an estimate of how long it will be unavailable. |
| |
| <p>In some cases, the servlet cannot make an estimate. For |
| example, the servlet might know that a server it needs is |
| not running, but not be able to report how long it will take |
| to be restored to functionality. This can be indicated with |
| a negative or zero value for the <code>seconds</code> argument.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>msg</code> - a <code>String</code> specifying the |
| descriptive message, which can be written |
| to a log file or displayed for the user.</dd> |
| <dd><code>seconds</code> - an integer specifying the number of seconds |
| the servlet expects to be unavailable; if |
| zero or negative, indicates that the servlet |
| can't make an estimate</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="isPermanent--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isPermanent</h4> |
| <pre>public boolean isPermanent()</pre> |
| <div class="block">Returns a <code>boolean</code> indicating |
| whether the servlet is permanently unavailable. |
| If so, something is wrong with the servlet, and the |
| system administrator must take some corrective action.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>true</code> if the servlet is |
| permanently unavailable; <code>false</code> |
| if the servlet is available or temporarily |
| unavailable</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getServlet--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getServlet</h4> |
| <pre>@Deprecated |
| public <a href="../../javax/servlet/Servlet.html" title="interface in javax.servlet">Servlet</a> getServlet()</pre> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">As of Java Servlet API 2.2, with no replacement. |
| |
| Returns the servlet that is reporting its unavailability.</span></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the <code>Servlet</code> object that is |
| throwing the <code>UnavailableException</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getUnavailableSeconds--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>getUnavailableSeconds</h4> |
| <pre>public int getUnavailableSeconds()</pre> |
| <div class="block">Returns the number of seconds the servlet expects to |
| be temporarily unavailable. |
| |
| <p>If this method returns a negative number, the servlet |
| is permanently unavailable or cannot provide an estimate of |
| how long it will be unavailable. No effort is |
| made to correct for the time elapsed since the exception was |
| first reported.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>an integer specifying the number of seconds |
| the servlet will be temporarily unavailable, |
| or a negative number if the servlet is permanently |
| unavailable or cannot make an estimate</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| </div> |
| <!-- ========= END OF CLASS DATA ========= --> |
| <!-- ======= START OF BOTTOM NAVBAR ====== --> |
| <div class="bottomNav"><a name="navbar.bottom"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.bottom" title="Skip navigation links">Skip navigation links</a></div> |
| <a name="navbar.bottom.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../overview-summary.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="navBarCell1Rev">Class</li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../index-all.html">Index</a></li> |
| <li><a href="../../help-doc.html">Help</a></li> |
| </ul> |
| </div> |
| <div class="subNav"> |
| <ul class="navList"> |
| <li><a href="../../javax/servlet/SingleThreadModel.html" title="interface in javax.servlet"><span class="typeNameLink">Prev Class</span></a></li> |
| <li><a href="../../javax/servlet/WriteListener.html" title="interface in javax.servlet"><span class="typeNameLink">Next Class</span></a></li> |
| </ul> |
| <ul class="navList"> |
| <li><a href="../../index.html?javax/servlet/UnavailableException.html" target="_top">Frames</a></li> |
| <li><a href="UnavailableException.html" target="_top">No Frames</a></li> |
| </ul> |
| <ul class="navList" id="allclasses_navbar_bottom"> |
| <li><a href="../../allclasses-noframe.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_bottom"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| </div> |
| <div> |
| <ul class="subNavList"> |
| <li>Summary: </li> |
| <li>Nested | </li> |
| <li>Field | </li> |
| <li><a href="#constructor.summary">Constr</a> | </li> |
| <li><a href="#method.summary">Method</a></li> |
| </ul> |
| <ul class="subNavList"> |
| <li>Detail: </li> |
| <li>Field | </li> |
| <li><a href="#constructor.detail">Constr</a> | </li> |
| <li><a href="#method.detail">Method</a></li> |
| </ul> |
| </div> |
| <a name="skip.navbar.bottom"> |
| <!-- --> |
| </a></div> |
| <!-- ======== END OF BOTTOM NAVBAR ======= --> |
| </body> |
| </html> |