uk.gov.gchq.gaffer.graph.hook

Class NamedViewResolver

java.lang.Object

uk.gov.gchq.gaffer.graph.hook.NamedViewResolver

All Implemented Interfaces:

GraphHook

public class NamedViewResolver
extends Object
implements GraphHook

A GraphHook to resolve NamedViews.

Constructor Summary

Constructors

Constructor and Description
NamedViewResolver()
NamedViewResolver(NamedViewCache cache)

Method Summary

Modifier and Type	Method and Description
<T> T	onFailure(T result, OperationChain<?> opChain, Context context, Exception e) Called from Graph if an error occurs whilst executing the OperationChain.
<T> T	postExecute(T result, OperationChain<?> opChain, Context context) Called from Graph after an OperationChain is executed.
void	preExecute(OperationChain<?> opChain, Context context) Called from Graph before an OperationChain is executed.

Methods inherited from class java.lang.Object

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

Constructor Detail

NamedViewResolver

public NamedViewResolver()

NamedViewResolver

public NamedViewResolver(NamedViewCache cache)

Method Detail

preExecute

public void preExecute(OperationChain<?> opChain,
                       Context context)

Description copied from interface: GraphHook

Called from Graph before an OperationChain is executed.

Specified by:

preExecute in interface GraphHook

Parameters:

opChain - the OperationChain being executed. This can be modified/optimised in any GraphHook.

context - the Context in which the operation chain was executed. The context also holds a reference to the original operation chain.

postExecute

public <T> T postExecute(T result,
                         OperationChain<?> opChain,
                         Context context)

Description copied from interface: GraphHook

Called from Graph after an OperationChain is executed.

Specified by:

postExecute in interface GraphHook

Type Parameters:

T - the result type

Parameters:

result - the result from the operation chain

opChain - the OperationChain that was executed. This can be modified/optimised in any GraphHook.

context - the Context in which the operation chain was executed. The context also holds a reference to the original operation chain.

Returns:

result object

onFailure

public <T> T onFailure(T result,
                       OperationChain<?> opChain,
                       Context context,
                       Exception e)

Description copied from interface: GraphHook

Called from Graph if an error occurs whilst executing the OperationChain.

Specified by:

onFailure in interface GraphHook

Type Parameters:

T - the result type

Parameters:

result - the result from the operation chain - likely to be null.

opChain - the OperationChain that was executed. This can be modified/optimised in any GraphHook.

context - the Context in which the operation chain was executed. The context also holds a reference to the original operation chain.

e - the exception

Returns:

result object