# ReadPolicy.Consistency
Date: 2012-02-24

## com.google.appengine.api.datastore
Enum ReadPolicy.Consistency

    java.lang.Object
      java.lang.Enum<ReadPolicy.Consistency>
          com.google.appengine.api.datastore.ReadPolicy.Consistency

All Implemented Interfaces:
  java.io.Serializable, java.lang.Comparable<ReadPolicy.Consistency>

Enclosing class:
  ReadPolicy

    public static enum ReadPolicy.Consistency

extends java.lang.Enum<ReadPolicy.Consistency>

Setting the `Consistency` for reads allows you to decide whether freshness or availability is more important.

Enum Constant Summary
`EVENTUAL` Selects availability over freshness.
`STRONG` Selects freshness over availability.

Method Summary
`static ReadPolicy.Consistency` `valueOf(java.lang.String name)` Returns the enum constant of this type with the specified name.
`static ReadPolicy.Consistency[]` `values()` Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
`compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf`

Methods inherited from class java.lang.Object
`getClass, notify, notifyAll, wait, wait, wait`

Enum Constant Detail

### STRONG

    public static final ReadPolicy.Consistency STRONG

  Selects freshness over availability. Strongly consistent reads are guaranteed to return the most up-to-date data but will timeout more often than eventually consistent reads.

### EVENTUAL

    public static final ReadPolicy.Consistency EVENTUAL

  Selects availability over freshness. Eventually consistent reads will timeout less often than Strong reads but will occasionally return stale results.

Method Detail

### values

    public static ReadPolicy.Consistency[] 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 (ReadPolicy.Consistency c : ReadPolicy.Consistency.values())
          System.out.println(c);

  Returns:
    an array containing the constants of this enum type, in the order they are declared

### valueOf

    public static ReadPolicy.Consistency 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