Package org.eclipse.emf.cdo.server.db

Enum IPreparedStatementCache.ReuseProbability

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Comparable<IPreparedStatementCache.ReuseProbability>
    Enclosing interface:
    IPreparedStatementCache
    public static enum IPreparedStatementCache.ReuseProbability
extends java.lang.Enum<IPreparedStatementCache.ReuseProbability>
    An enum for the degree of probability to which a prepared statement is reused later on. This is used for managing the cache of prepared statements so that statements which are more likely reused are kept in the cache longer. Rule of thumb:
    • For global statements which are used regularly (such as lookup object in cdo_objects) use MAX.
    • For constant object-specific statements which are used regularly use HIGH.
    • For object-specific statements which are assembled from constants which are used regularly use MEDIUM.
    • For all other dynamic statements, like queries, use LOW
    Since:
    2.0
    Author:
    Stefan Winkler
    No Extend
    This interface is not intended to be extended by clients.

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description
      HIGH  
      LOW  
      MAX  
      MEDIUM  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static IPreparedStatementCache.ReuseProbability valueOf​(java.lang.String name)
      Returns the enum constant of this type with the specified name.
      static IPreparedStatementCache.ReuseProbability[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.

      • Methods inherited from class java.lang.Enum

        clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

      • Methods inherited from class java.lang.Object

        getClass, notify, notifyAll, wait, wait, wait

    • Method Detail

      • values

        public static IPreparedStatementCache.ReuseProbability[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows: 
        for (IPreparedStatementCache.ReuseProbability c : IPreparedStatementCache.ReuseProbability.values())
    System.out.println(c);
        Returns:
        an array containing the constants of this enum type, in the order they are declared

      • valueOf

        public static IPreparedStatementCache.ReuseProbability valueOf​(java.lang.String name)
        Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
        Parameters:
        name - the name of the enum constant to be returned.
        Returns:
        the enum constant with the specified name
        Throws:
        java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
        java.lang.NullPointerException - if the argument is null