ProbeNode.Instrumentable

Enclosing class:

ProbeNode
```
public static interface ProbeNode.Instrumentable
```
Any Truffle node implementing this interface can be "instrumented" by installing a Probe that intercepts execution events at the node and routes them to any Instruments that have been attached to the Probe. Only one Probe may be installed at each node; subsequent calls return the one already installed.

See Also:

Instrument

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Probe`	`probe()`	Enables "instrumentation" of a Guest Language Truffle node, where the node is presumed to be part of a well-formed Truffle AST that is not being executed.
`void`	`probeLite(TruffleEventReceiver eventReceiver)`	Enables a one-time, unchangeable "instrumentation" of a Guest Language Truffle node, where the node is presumed to be part of a well-formed Truffle AST that is not being executed.

- Method Detail
  - probe
```
Probe probe()
```
    Enables "instrumentation" of a Guest Language Truffle node, where the node is presumed to be part of a well-formed Truffle AST that is not being executed. The AST may be modified as a side effect.
    This interface is not intended to be visible as part of the API for tools (instrumentation clients).
    
    Returns:
    
    a (possibly newly created) Probe associated with this node.
  - probeLite
```
void probeLite(TruffleEventReceiver eventReceiver)
```
    Enables a one-time, unchangeable "instrumentation" of a Guest Language Truffle node, where the node is presumed to be part of a well-formed Truffle AST that is not being executed. The AST may be modified as a side-effect. Unlike probe(), once probeLite(TruffleEventReceiver) is called at a node, no additional probing can be added and no additional instrumentation can be attached.
    This interface is not intended to be visible as part of the API for tools (instrumentation clients).
    
    Parameters:
    
    eventReceiver - The TruffleEventReceiver for the single "instrument" being attached to this node.