Package org.infinispan.server.hotrod.tx.table

Class GlobalTxTable

java.lang.Object

org.infinispan.server.hotrod.tx.table.GlobalTxTable

All Implemented Interfaces:

Runnable, Lifecycle

public class GlobalTxTable
extends Object
implements Runnable, Lifecycle

It is a transaction log that registers all the transaction decisions before changing the cache.

The transaction state is stored in TxState, and that is stored in a replicated cache. The TxState must be updated before performing any action in the transaction (prepare, commit, etc.).

In addition, since we don't have a client crash notification, it performs a reaper work, periodically, that cleanups idle transactions. The transaction is considered idle based on the timeout sent by the client. If no decision is made, it rollbacks the transaction. If the transaction is completed (committed or rolled-back), it is removed from the cache. If the transaction is decided (i.e. marked for commit or rollback), it completes the transaction.

Note that, recoverable transactions (transactions originated from FULL_XA support caches) aren't touched by the reaper. The recovery process is responsible to handle them.

Since:

9.4

Author:

Pedro Ruivo

Constructor Summary

Constructors

Constructor	Description
GlobalTxTable(Cache<CacheXid,TxState> storage, GlobalComponentRegistry gcr)

Method Summary

Modifier and Type	Method	Description
void	forgetTransaction(XidImpl xid)
Collection<XidImpl>	getPreparedTransactions()
TxState	getState(CacheXid xid)
boolean	isEmpty()
void	markToCommit(XidImpl xid, CacheNameCollector collector)
void	markToRollback(XidImpl xid, CacheNameCollector collector)
void	remove(CacheXid cacheXid)
void	run()	periodically checks for idle transactions and rollbacks them.
void	start()	Invoked on component start
void	stop()	Invoked on component stop
Status	update(CacheXid key, TxFunction function, long timeoutMillis)

Methods inherited from class java.lang.Object

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

Constructor Details

GlobalTxTable

public GlobalTxTable(Cache<CacheXid,TxState> storage,
 GlobalComponentRegistry gcr)

Method Details

start

public void start()

Description copied from interface: Lifecycle

Invoked on component start

Specified by:

start in interface Lifecycle

stop

public void stop()

Description copied from interface: Lifecycle

Invoked on component stop

Specified by:

stop in interface Lifecycle

update

public Status update(CacheXid key,
 TxFunction function,
 long timeoutMillis)

markToCommit

public void markToCommit(XidImpl xid,
 CacheNameCollector collector)

markToRollback

public void markToRollback(XidImpl xid,
 CacheNameCollector collector)

getState

public TxState getState(CacheXid xid)

remove

public void remove(CacheXid cacheXid)

forgetTransaction

public void forgetTransaction(XidImpl xid)

run

public void run()

periodically checks for idle transactions and rollbacks them.

Specified by:

run in interface Runnable

getPreparedTransactions

public Collection<XidImpl> getPreparedTransactions()

isEmpty

public boolean isEmpty()