org.springframework.batch.core.job.flow.support
Class SimpleFlow

java.lang.Object
  org.springframework.batch.core.job.flow.support.SimpleFlow

All Implemented Interfaces:

Flow, InitializingBean

public class SimpleFlow
extends Object
implements Flow, InitializingBean

A Flow that branches conditionally depending on the exit status of the last State. The input parameters are the state transitions (in no particular order). The start state name can be specified explicitly (and must exist in the set of transitions), or computed from the existing transitions, if unambiguous.

Since:

2.0

Author:

Dave Syer

Constructor Summary

SimpleFlow(String name)
Create a flow with the given name.

Method Summary

void	afterPropertiesSet() Locate start state and pre-populate data structures needed for execution.
String	getName() Get the name for this flow.
State	getState(String stateName) Retrieve the State with the given name.
Collection<State>	getStates() Convenient accessor for clients needing to explore the states of this flow.
FlowExecution	resume(String stateName, FlowExecutor executor)
void	setStateTransitions(List<StateTransition> stateTransitions) Public setter for the stateTransitions.
FlowExecution	start(FlowExecutor executor)

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleFlow

public SimpleFlow(String name)

Create a flow with the given name.

Parameters:

name - the name of the flow

Method Detail

getName

public String getName()

Get the name for this flow.

Specified by:

getName in interface Flow

Returns:

the name of the flow

See Also:

Flow.getName()

setStateTransitions

public void setStateTransitions(List<StateTransition> stateTransitions)

Public setter for the stateTransitions.

Parameters:

stateTransitions - the stateTransitions to set

getState

public State getState(String stateName)

Retrieve the State with the given name. If there is no State with the given name, then return null.

Specified by:

getState in interface Flow

Returns:

the State

getStates

public Collection<State> getStates()

Convenient accessor for clients needing to explore the states of this flow.

Specified by:

getStates in interface Flow

Returns:

the states

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Locate start state and pre-populate data structures needed for execution.

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

Exception

See Also:

InitializingBean.afterPropertiesSet()

start

public FlowExecution start(FlowExecutor executor)
                    throws FlowExecutionException

Specified by:

start in interface Flow

Throws:

FlowExecutionException

See Also:

Flow.start(FlowExecutor)

resume

public FlowExecution resume(String stateName,
                            FlowExecutor executor)
                     throws FlowExecutionException

Specified by:

resume in interface Flow

Parameters:

stateName - the name of the state to resume on

executor - the context to be passed into each state executed

Returns:

a FlowExecution containing the exit status of the flow

Throws:

FlowExecutionException

See Also:

Flow.resume(String, FlowExecutor)