ERXTemporaryGlobalID Class Reference
Inherits com::webobjects::eocontrol::EOGlobalID.
Collaboration diagram for ERXTemporaryGlobalID:
Public Member Functions | |
| NSDictionary | dictionary (String key) |
| boolean | equals (Object obj) |
| ERXTemporaryGlobalID () | |
| int | hashCode () |
| boolean | isTemporary () |
| String | toString () |
| long | value () |
Static Public Member Functions | |
| static void | setIdentifier (int value) |
Private Member Functions | |
| long | identifier () |
Static Private Member Functions | |
| static long | appIdentifier () |
| static long | hostIdentifier () |
| static void | setDefaultAppIdentifier () |
Private Attributes | |
| long | _value |
Static Private Attributes | |
| static long | _cnt |
| static long | _identifier |
| static long | _lastTime |
| static String | hex = "0123456789abcdef" |
Detailed Description
Experimental class to have quasi-GUIDs that fit into a long. Used as an alternative to the ERXLongPrimaryKeyFactory or the 24 byte built-in keys. To have it installed, set your pk prototype to "longId".Note: by default, the key is partitioned by the lower 2 bytes host address, the lower byte of the port number and the current time in seconds. Then you have a byte left for inserts in one second.
This means, if you you are inserting - say - one thousand objects and your app crashes and restarts in 4 seconds and directly inserts new objects, then you might end up with duplicate keys. So this might only be for apps that stay at a low volume.
Also you need to be sure that your app is in one class B subnet and your instances port numbers are partitionable over the lower byte - which means less than 256 instances on one host.
Given these restrictions, you might want to stay with sequences...
Constructor & Destructor Documentation
Member Function Documentation
| static long appIdentifier | ( | ) | [static, private] |
| NSDictionary dictionary | ( | String | key | ) |
Returns a pk-ready dictionary with the supplied key.
- Parameters:
-
key
| boolean equals | ( | Object | obj | ) |
| int hashCode | ( | ) |
| static long hostIdentifier | ( | ) | [static, private] |
| long identifier | ( | ) | [private] |
| boolean isTemporary | ( | ) |
| static void setDefaultAppIdentifier | ( | ) | [static, private] |
| static void setIdentifier | ( | int | value | ) | [static] |
| String toString | ( | ) |
| long value | ( | ) |
Member Data Documentation
long _cnt [static, private] |
long _identifier [static, private] |
long _lastTime [static, private] |
long _value [private] |
The documentation for this class was generated from the following file:
- /opt/source/Wonder/Frameworks/Core/ERExtensions/Sources/er/extensions/eof/ERXTemporaryGlobalID.java
