| java.lang.Object
 com.jcorporate.expresso.core.dbobj.NextNumber
com.jcorporate.expresso.core.dbobj.NextNumberImpl
| NextNumberImpl | | public class NextNumberImpl extends NextNumber (Code) | | this class is a SOLITAIRE, used in NextNumber
author:
Original by Michael Nash, rewritten by Michael Rimov, Larry Hamel
author:
author:
Modify by Yves Henri AMAIZO
See Also: com.jcorporate.expresso.core.dbobj.NextNumber
See Also: NextNumber - Manages in-memory, database independent autoincrement values. This
See Also: version is not cluster safe. See Expresso Enterprise for a cluster-safe version.
since:
$DatabaseSchema $Date: 2004/11/17 20:48:11 $ |
| Field Summary | |
| protected volatile ConcurrentReaderHashMap | contextMap
Top level hashMap - This level separates the db contexts. |
| Constructor Summary | |
| public | NextNumberImpl()
Create the base level hashes for each db key. |
| contextMap | | protected volatile ConcurrentReaderHashMap contextMap(Code) | | Top level hashMap - This level separates the db contexts. The object
returned by a get() is another Map() containing lists of dbobject
fields. The key is DBObject.getTargetTable() + "." + DBField.getFieldName()
this will return the Integer object that will be the number is internally
incremented,
|
| NextNumberImpl | | public NextNumberImpl()(Code) | | Create the base level hashes for each db key.
|
| checkParams | | protected void checkParams(String db, DBObject callingObject, String fieldName) throws DBException(Code) | | All parameters are
fully checked to avoid potential NullPointerExceptions
Parameters:
db - The context to get this out of.
Parameters:
callingObject - - the DBObject that this nextnumber object belongs to.
Parameters:
fieldName - - the field name within the callingObject that this nextnumber belongs to. |
| initialize | | public void initialize(String db, DBObject callingObject) throws DBException(Code) | | Initializes hash entries for all auto-inc fields in a particular DBOBject. This is
called the first time that a particular DBObject has a nextnumber called for any field.
this method should be synchronized externally.
Parameters:
db - The db to hook this nextnumber object to.
Parameters:
callingObject - the object to initialize from. |
| reset | | public void reset(String db)(Code) | | Reset the counts for the paritcular db each subsequent operation will
require a new getMax(). There is questionable threadsafety about the
reset methods. Please only do it on a "non-live" server. Used after a
DBCreate or DeleteSchema has been called.
|
| reset | | public void reset(String db, DBObject callingObject)(Code) | | Clears the table on a particular dbobject. Similar to reset db
Parameters:
db - The db context that the next number resides in.
Parameters:
callingObject - the object that links to the various nextnumberobjects |
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