TimestampValueGenerator

java.lang.Object

org.datanucleus.store.valuegenerator.AbstractGenerator<Long>

org.datanucleus.store.valuegenerator.TimestampValueGenerator

All Implemented Interfaces:: ValueGenerator<Long>

public class TimestampValueGenerator extends AbstractGenerator<Long>

Value generator for timestamp values (millisecs). The "timestamps" are the number of milliseconds (since Jan 1 1970).

Field Summary

Fields inherited from class AbstractGenerator
allocationSize, block, initialValue, name, storeMgr

Fields inherited from interface ValueGenerator
PROPERTY_CATALOG_NAME, PROPERTY_CLASS_NAME, PROPERTY_COLUMN_NAME, PROPERTY_FIELD_NAME, PROPERTY_KEY_CACHE_SIZE, PROPERTY_KEY_DATABASE_CACHE_SIZE, PROPERTY_KEY_INITIAL_VALUE, PROPERTY_KEY_MAX_VALUE, PROPERTY_KEY_MIN_VALUE, PROPERTY_ROOT_CLASS_NAME, PROPERTY_SCHEMA_NAME, PROPERTY_SEQUENCE_NAME, PROPERTY_SEQUENCETABLE_CATALOG, PROPERTY_SEQUENCETABLE_NAME_COLUMN, PROPERTY_SEQUENCETABLE_NEXTVAL_COLUMN, PROPERTY_SEQUENCETABLE_SCHEMA, PROPERTY_SEQUENCETABLE_TABLE, PROPERTY_TABLE_NAME
Constructor Summary

Constructors

Constructor

Description

TimestampValueGenerator(StoreManager storeMgr, String name)

Constructor.
Method Summary

Modifier and Type

Method

Description

static Class

getStorageClass()

Accessor for the storage class for values generated with this generator.

protected ValueGenerationBlock<Long>

reserveBlock(long size)

Method to reserve a block of values.

Methods inherited from class AbstractGenerator
allocate, current, currentValue, getName, next, nextValue, obtainGenerationBlock, obtainGenerationBlock, reserveBlock

Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- TimestampValueGenerator
  
  public TimestampValueGenerator(StoreManager storeMgr, String name)
  
  Constructor.
  
  Parameters:
  
  storeMgr - StoreManager
  
  name - Symbolic name of the generator
Method Details
- getStorageClass
  
  public static Class getStorageClass()
  
  Accessor for the storage class for values generated with this generator.
  
  Returns:
  
  Storage class (in this case Long.class)
- reserveBlock
  
  protected ValueGenerationBlock<Long> reserveBlock(long size)
  
  Method to reserve a block of values. Only ever reserves a single timestamp, to the time at which it is created.
  
  Specified by:
  
  reserveBlock in class AbstractGenerator<Long>
  
  Parameters:
  
  size - Number of elements to reserve.
  
  Returns:
  
  The block.