graphql.execution

Class ExecutionStrategy

java.lang.Object

graphql.execution.ExecutionStrategy

Direct Known Subclasses:

BatchedExecutionStrategy, ExecutorServiceExecutionStrategy, SimpleExecutionStrategy

@PublicSpi
public abstract class ExecutionStrategy
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
protected FieldCollector	fieldCollector
protected ValuesResolver	valuesResolver

Constructor Summary

Constructors

Constructor and Description
ExecutionStrategy()

Method Summary

Modifier and Type	Method and Description
protected ExecutionResult	completeValue(ExecutionContext executionContext, ExecutionParameters parameters, java.util.List<Field> fields)
protected ExecutionResult	completeValueForEnum(GraphQLEnumType enumType, java.lang.Object result)
protected ExecutionResult	completeValueForList(ExecutionContext executionContext, ExecutionParameters parameters, java.util.List<Field> fields, java.lang.Iterable<java.lang.Object> result)
protected ExecutionResult	completeValueForScalar(GraphQLScalarType scalarType, java.lang.Object result)
abstract ExecutionResult	execute(ExecutionContext executionContext, ExecutionParameters parameters)
protected GraphQLFieldDefinition	getFieldDef(GraphQLSchema schema, GraphQLObjectType parentType, Field field)
protected void	handleDataFetchingException(ExecutionContext executionContext, GraphQLFieldDefinition fieldDef, java.util.Map<java.lang.String,java.lang.Object> argumentValues, java.lang.Exception e) Handle exceptions which occur during data fetching.
protected ExecutionResult	resolveField(ExecutionContext executionContext, ExecutionParameters parameters, java.util.List<Field> fields)
protected GraphQLObjectType	resolveTypeForInterface(TypeResolutionParameters params)
protected GraphQLObjectType	resolveTypeForUnion(TypeResolutionParameters params)

Methods inherited from class java.lang.Object

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

Field Detail

valuesResolver

protected final ValuesResolver valuesResolver

fieldCollector

protected final FieldCollector fieldCollector

Constructor Detail

ExecutionStrategy

public ExecutionStrategy()

Method Detail

execute

public abstract ExecutionResult execute(ExecutionContext executionContext,
                                        ExecutionParameters parameters)
                                 throws NonNullableFieldWasNullException

Throws:

NonNullableFieldWasNullException

handleDataFetchingException

protected void handleDataFetchingException(ExecutionContext executionContext,
                                           GraphQLFieldDefinition fieldDef,
                                           java.util.Map<java.lang.String,java.lang.Object> argumentValues,
                                           java.lang.Exception e)

Handle exceptions which occur during data fetching. By default, add all exceptions to the execution context's error's. Subclasses may specify custom handling, e.g. of different behavior with different exception types (e.g. re-throwing certain exceptions).

Parameters:

executionContext - the execution context in play

fieldDef - the field definition

argumentValues - the map of arguments

e - the exception that occurred

resolveField

protected ExecutionResult resolveField(ExecutionContext executionContext,
                                       ExecutionParameters parameters,
                                       java.util.List<Field> fields)

completeValue

protected ExecutionResult completeValue(ExecutionContext executionContext,
                                        ExecutionParameters parameters,
                                        java.util.List<Field> fields)

resolveTypeForInterface

protected GraphQLObjectType resolveTypeForInterface(TypeResolutionParameters params)

resolveTypeForUnion

protected GraphQLObjectType resolveTypeForUnion(TypeResolutionParameters params)

completeValueForEnum

protected ExecutionResult completeValueForEnum(GraphQLEnumType enumType,
                                               java.lang.Object result)

completeValueForScalar

protected ExecutionResult completeValueForScalar(GraphQLScalarType scalarType,
                                                 java.lang.Object result)

completeValueForList

protected ExecutionResult completeValueForList(ExecutionContext executionContext,
                                               ExecutionParameters parameters,
                                               java.util.List<Field> fields,
                                               java.lang.Iterable<java.lang.Object> result)

getFieldDef

protected GraphQLFieldDefinition getFieldDef(GraphQLSchema schema,
                                             GraphQLObjectType parentType,
                                             Field field)