Package javax.portlet

Class UnavailableException

  • All Implemented Interfaces:
    java.io.Serializable

    public class UnavailableException
    extends PortletException
    The portlet should throw the UnavailableException when the portlet is either temporarily or permanently unavailable to handle requests.
    See Also:
    Serialized Form
    • Constructor Summary

      Constructors 
      Constructor Description
      UnavailableException​(java.lang.String text)
      Constructs a new exception with a descriptive message indicating that the portlet is permanently unavailable.
      UnavailableException​(java.lang.String text, int seconds)
      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.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int getUnavailableSeconds()
      Returns the time in seconds for which the portlet can be expected to be unavailable.
      boolean isPermanent()
      Returns a boolean indicating whether the portlet is permanently unavailable.
      • Methods inherited from class java.lang.Throwable

        addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
    • Field Detail

      • permanent

        private boolean permanent
      • seconds

        private int seconds
    • Constructor Detail

      • UnavailableException

        public UnavailableException​(java.lang.String text)
        Constructs a new exception with a descriptive message indicating that the portlet is permanently unavailable.
        Parameters:
        text - a String specifying the descriptive message
      • UnavailableException

        public UnavailableException​(java.lang.String text,
                                    int seconds)
        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.

        Parameters:
        text - a String specifying the descriptive message. This message can be written to a log file or displayed for the user.
        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.
    • Method Detail

      • isPermanent

        public boolean isPermanent()
        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.
        Returns:
        true if the portlet is permanently unavailable; false if the portlet is temporarily unavailable.
      • getUnavailableSeconds

        public int getUnavailableSeconds()
        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.

        Returns:
        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.