com.goldencode.p2j.persist.meta

Class TransactionTableUpdater

java.lang.Object

com.goldencode.p2j.persist.meta.TransactionTableUpdater

public final class TransactionTableUpdater
extends java.lang.Object

An utility class which receives notifications from the TransactionManager when a flush of _Trans metadata VST is needed. This involves dropping the expired records and creation of new transaction records.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TransactionTableUpdater.Empty Dummy empty class to be used as the super class for proxies.
private static class	TransactionTableUpdater.Handler Invocation handler which delegates calls to the TransactionTableUpdater.MinimalTrans proxy methods to the backing DMO instance.
static interface	TransactionTableUpdater.MinimalTrans Interface which defines the minimally required methods of the MetaTrans interface.

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.Class<? extends Record>	dmoClass MetaTrans DMO implementation class
private TransactionTableUpdater.Handler	handler Invocation handler which maps proxy method calls to underlying DMO methods
private static CentralLogger	LOG Logger
private static java.util.Map<java.lang.reflect.Method,java.lang.reflect.Method>	methodMap Map of MinimalTrans methods to MetaTransImpl methods
private TransactionTableUpdater.MinimalTrans	proxy Proxy object for the current metadata transaction DMO
private static java.lang.String	TRANS_TABLE Metadata transaction table name

Constructor Summary

Constructors

Constructor and Description
TransactionTableUpdater() Constructor which stores a persistence object for the associated metadata database, and initializes a proxy for the application-specific DMO.

Method Summary

Modifier and Type	Method and Description
void	flush(Persistence p, java.util.Map<java.lang.Integer,java.lang.Integer> transactions) Synchronize metadata table with map of transaction IDs to session IDs, creating and persisting a DMO for each record not already in the table.
static boolean	isEnabled() Check whether the project was configured with support for _Trans.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final CentralLogger LOG

Logger

TRANS_TABLE

private static final java.lang.String TRANS_TABLE

Metadata transaction table name

See Also:

Constant Field Values

dmoClass

private static final java.lang.Class<? extends Record> dmoClass

MetaTrans DMO implementation class

methodMap

private static final java.util.Map<java.lang.reflect.Method,java.lang.reflect.Method> methodMap

Map of MinimalTrans methods to MetaTransImpl methods

proxy

private final TransactionTableUpdater.MinimalTrans proxy

Proxy object for the current metadata transaction DMO

handler

private final TransactionTableUpdater.Handler handler

Invocation handler which maps proxy method calls to underlying DMO methods

Constructor Detail

TransactionTableUpdater

public TransactionTableUpdater()

Constructor which stores a persistence object for the associated metadata database, and initializes a proxy for the application-specific DMO.

Method Detail

isEnabled

public static boolean isEnabled()

Check whether the project was configured with support for _Trans.

Returns:

true when the project was configured with support for _Trans.

flush

public void flush(Persistence p,
                  java.util.Map<java.lang.Integer,java.lang.Integer> transactions)

Synchronize metadata table with map of transaction IDs to session IDs, creating and persisting a DMO for each record not already in the table.

Parameters:

p - The Persistence to be used when flushing data to database.

transactions - The set of active transactions from the current database, mapped by the users (connection ID) that opened them.