javax.portlet.UnavailableException Maven / Gradle / Ivy
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/* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* 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.portlet;
/**
* The portlet should throw the UnavailableException when
* the portlet is either temporarily or permanently unavailable to handle requests.
*
**/
public class UnavailableException extends PortletException
{
private boolean permanent; // needs admin action?
private int seconds; // unavailability estimate
private static final long serialVersionUID = 1L;
/**
*
* Constructs a new exception with a descriptive
* message indicating that the portlet is permanently
* unavailable.
*
* @param text a String specifying the
* descriptive message
*
*/
public UnavailableException(String text) {
super(text);
permanent = true;
}
/**
* Constructs a new exception with a descriptive message
* indicating that the portlet is temporarily unavailable
* and giving an estimate of how long it will be unavailable.
*
* In some cases, the portlet cannot make an estimate. For
* example, the portlet might know that a server it needs is
* not running, but it might 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 seconds argument.
*
* @param text a String specifying the
* descriptive message. This message can be written
* to a log file or displayed for the user.
*
* @param seconds an integer specifying the number of seconds
* for which the portlet expects to be unavailable; if
* this is zero or negative, it indicates that the portlet
* cannot make an estimate.
*
*/
public UnavailableException(String text, int seconds) {
super(text);
if (seconds <= 0)
this.seconds = -1;
else
this.seconds = seconds;
permanent = false;
}
/**
*
* Returns a boolean indicating
* whether the portlet is permanently unavailable.
* If so, something is wrong with the portlet, and the
* system administrator must take some corrective action.
*
* @return true if the portlet is
* permanently unavailable; false
* if the portlet is temporarily
* unavailable.
*
*/
public boolean isPermanent() {
return permanent;
}
/**
* Returns the time in seconds for which the portlet can be expected to
* be unavailable.
*
* If the portlet is called again while it is still unavailable, it
* indicates the same time estimate. No effort is
* made to correct for the time elapsed since the exception was
* first reported.
*
* If this method returns zero or a negative number, the portlet
* is permanently unavailable or cannot provide an estimate of
* how long it will be unavailable.
*
* @return an integer specifying the number of seconds
* the portlet will be temporarily unavailable,
* or zero or a negative number if the portlet is permanently
* unavailable or cannot make an estimate.
*
*/
public int getUnavailableSeconds() {
return permanent ? -1 : seconds;
}
}