org.statefulj.persistence.memory

Class MemoryPersisterImpl<T>

java.lang.Object

org.statefulj.persistence.memory.MemoryPersisterImpl<T>

All Implemented Interfaces:

Persister<T>

public class MemoryPersisterImpl<T>
extends Object
implements Persister<T>

Thread safe, in memory Persister.

Author:

Andrew Hall

Constructor Summary

Constructors

Constructor and Description
MemoryPersisterImpl(Collection<State<T>> states, State<T> start)
MemoryPersisterImpl(List<State<T>> states, State<T> start, String stateFieldName)
MemoryPersisterImpl(T stateful, List<State<T>> states, State<T> start)
MemoryPersisterImpl(T stateful, List<State<T>> states, State<T> start, String stateFieldName)

Method Summary

Methods

Modifier and Type	Method and Description
State<T>	addState(State<T> state)
State<T>	getCurrent(T stateful) Returns the current state.
State<T>	getStart()
String	getStateFieldName()
Collection<State<T>>	getStates()
State<T>	removeState(State<T> state)
State<T>	removeState(String name)
void	setCurrent(T stateful, State<T> current)
void	setCurrent(T stateful, State<T> current, State<T> next) Set the current state to the next state.
void	setStart(State<T> start)
void	setStateFieldName(String stateFieldName)
void	setStates(Collection<State<T>> states)

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryPersisterImpl

public MemoryPersisterImpl(Collection<State<T>> states,
                   State<T> start)

MemoryPersisterImpl

public MemoryPersisterImpl(List<State<T>> states,
                   State<T> start,
                   String stateFieldName)

MemoryPersisterImpl

public MemoryPersisterImpl(T stateful,
                   List<State<T>> states,
                   State<T> start)

MemoryPersisterImpl

public MemoryPersisterImpl(T stateful,
                   List<State<T>> states,
                   State<T> start,
                   String stateFieldName)

Method Detail

getStates

public Collection<State<T>> getStates()

addState

public State<T> addState(State<T> state)

removeState

public State<T> removeState(State<T> state)

removeState

public State<T> removeState(String name)

setStates

public void setStates(Collection<State<T>> states)

getStart

public State<T> getStart()

setStart

public void setStart(State<T> start)

getStateFieldName

public String getStateFieldName()

setStateFieldName

public void setStateFieldName(String stateFieldName)

getCurrent

public State<T> getCurrent(T stateful)

Description copied from interface: Persister

Returns the current state. This will not call into the underlying database

Specified by:

getCurrent in interface Persister<T>

Parameters:

stateful - Stateful Entity

Returns:

current State of the Stateful Entity

setCurrent

public void setCurrent(T stateful,
              State<T> current)

setCurrent

public void setCurrent(T stateful,
              State<T> current,
              State<T> next)
                throws StaleStateException

Description copied from interface: Persister

Set the current state to the next state. Will serialize access to the persistence and ensure that expected current state is indeed the current state. If not, will throw a StaleStateException

Specified by:

setCurrent in interface Persister<T>

Parameters:

stateful - StatefulEntity

current - Expected current State of the Stateful Entity

next - The value of the updated State

Throws:

StaleStateException - thrown if the state value of the Stateful Entity is not equal to the passed in current value