org.hibernate.reactive.id.impl

Class BlockingIdentifierGenerator

java.lang.Object

org.hibernate.reactive.id.impl.BlockingIdentifierGenerator

All Implemented Interfaces:

ReactiveIdentifierGenerator<java.lang.Long>

Direct Known Subclasses:

SequenceReactiveIdentifierGenerator, TableReactiveIdentifierGenerator

public abstract class BlockingIdentifierGenerator
extends java.lang.Object
implements ReactiveIdentifierGenerator<java.lang.Long>

A ReactiveIdentifierGenerator which uses the database to allocate blocks of ids. A block is identified by its "hi" value (the first id in the block). While a new block is being allocated, concurrent streams wait without blocking.

Constructor Summary

Constructors

Constructor and Description
BlockingIdentifierGenerator()

Method Summary

Modifier and Type	Method and Description
java.util.concurrent.CompletionStage<java.lang.Long>	generate(ReactiveConnectionSupplier session, java.lang.Object entity) Returns a generated identifier, via a CompletionStage.
protected abstract int	getBlockSize() The block size (the number of "lo" values for each "hi" value)
protected long	next()
protected long	next(long hi)
protected abstract java.util.concurrent.CompletionStage<java.lang.Long>	nextHiValue(ReactiveConnectionSupplier session) Allocate a new block, by obtaining the next "hi" value from the database

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BlockingIdentifierGenerator

public BlockingIdentifierGenerator()

Method Detail

getBlockSize

protected abstract int getBlockSize()

The block size (the number of "lo" values for each "hi" value)

nextHiValue

protected abstract java.util.concurrent.CompletionStage<java.lang.Long> nextHiValue(ReactiveConnectionSupplier session)

Allocate a new block, by obtaining the next "hi" value from the database

next

protected long next()

next

protected long next(long hi)

generate

public java.util.concurrent.CompletionStage<java.lang.Long> generate(ReactiveConnectionSupplier session,
                                                                     java.lang.Object entity)

Description copied from interface: ReactiveIdentifierGenerator

Returns a generated identifier, via a CompletionStage.

Specified by:

generate in interface ReactiveIdentifierGenerator<java.lang.Long>

Parameters:

session - the reactive session