Package graphql.execution.instrumentation.fieldvalidation

Class FieldValidationInstrumentation

java.lang.Object

graphql.execution.instrumentation.SimplePerformantInstrumentation

graphql.execution.instrumentation.fieldvalidation.FieldValidationInstrumentation

All Implemented Interfaces:

Instrumentation

@PublicApi
public class FieldValidationInstrumentation
extends SimplePerformantInstrumentation

This Instrumentation allows you to validate the fields of the query before the query is executed. You need to provide an implementation of FieldValidation that is called to validate fields. If it returns errors then the query execution will be aborted and the errors will be returned in the execution result

See Also:

• FieldValidation

Field Summary

Fields inherited from class graphql.execution.instrumentation.SimplePerformantInstrumentation

INSTANCE

Constructor Summary

Constructors

Constructor	Description
FieldValidationInstrumentation(FieldValidation fieldValidation)	Your field validation will be called before query execution

Method Summary

Modifier and Type	Method	Description
@Nullable InstrumentationContext<ExecutionResult>	beginExecuteOperation(InstrumentationExecuteOperationParameters parameters, InstrumentationState state)	This is called just before the execution of the query operation is started.

Methods inherited from class graphql.execution.instrumentation.SimplePerformantInstrumentation

beginExecuteObject, beginExecution, beginExecutionStrategy, beginFieldCompletion, beginFieldExecution, beginFieldFetch, beginFieldListCompletion, beginParse, beginSubscribedFieldEvent, beginValidation, createState, createStateAsync, instrumentDataFetcher, instrumentDocumentAndVariables, instrumentExecutionContext, instrumentExecutionInput, instrumentExecutionResult, instrumentSchema

Methods inherited from class java.lang.Object

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

Methods inherited from interface graphql.execution.instrumentation.Instrumentation

beginDeferredField, beginFieldFetching

Constructor Details

FieldValidationInstrumentation

public FieldValidationInstrumentation(FieldValidation fieldValidation)

Your field validation will be called before query execution

Parameters:

fieldValidation - the field validation to call

Method Details

beginExecuteOperation

public @Nullable InstrumentationContext<ExecutionResult> beginExecuteOperation(InstrumentationExecuteOperationParameters parameters,
 InstrumentationState state)

Description copied from interface: Instrumentation

This is called just before the execution of the query operation is started.

Specified by:

beginExecuteOperation in interface Instrumentation

Overrides:

beginExecuteOperation in class SimplePerformantInstrumentation

Parameters:

parameters - the parameters to this step

state - the state created during the call to Instrumentation.createStateAsync(InstrumentationCreateStateParameters)

Returns:

a nullable InstrumentationContext object that will be called back when the step ends (assuming it's not null)