InstrumentationContext (graphql-java 0.0.0-2024-02-21T00-46-34-ef846bf API)

All Known Subinterfaces:

ExecuteObjectInstrumentationContext, ExecutionStrategyInstrumentationContext

All Known Implementing Classes:

ExecuteObjectInstrumentationContextAdapter, ExecutionResultInstrumentationContextAdapter, SimpleInstrumentationContext
```
@PublicSpi
public interface InstrumentationContext<T>
```
When a Instrumentation.'beginXXX()' method is called then it must return a non null InstrumentationContext that will be invoked when the step is first dispatched and then when it completes. Sometimes this is effectively the same time whereas at other times its when an asynchronous CompletableFuture completes. This pattern of construction of an object then call back is intended to allow "timers" to be created that can instrument what has just happened or "loggers" to be called to record what has happened.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onCompleted(T result, java.lang.Throwable t)`	This is invoked when the instrumentation step is fully completed
`void`	`onDispatched(java.util.concurrent.CompletableFuture<T> result)`	This is invoked when the instrumentation step is initially dispatched

- Method Detail
  - onDispatched
```
void onDispatched(java.util.concurrent.CompletableFuture<T> result)
```
    This is invoked when the instrumentation step is initially dispatched
    
    Parameters:
    
    result - the result of the step as a completable future
  - onCompleted
```
void onCompleted(T result,
                 java.lang.Throwable t)
```
    This is invoked when the instrumentation step is fully completed
    
    Parameters:
    
    result - the result of the step (which may be null)
    
    t - this exception will be non null if an exception was thrown during the step