Package graphql.execution

Class AsyncExecutionStrategy

java.lang.Object

graphql.execution.ExecutionStrategy

graphql.execution.AbstractAsyncExecutionStrategy

graphql.execution.AsyncExecutionStrategy

@PublicApi
public class AsyncExecutionStrategy
extends AbstractAsyncExecutionStrategy

The standard graphql execution strategy that runs fields asynchronously non-blocking.

Field Summary

Fields inherited from class graphql.execution.ExecutionStrategy

dataFetcherExceptionHandler, executionStepInfoFactory, fieldCollector

Constructor Summary

Constructors

Constructor	Description
AsyncExecutionStrategy()	The standard graphql execution strategy that runs fields asynchronously
AsyncExecutionStrategy(DataFetcherExceptionHandler exceptionHandler)	Creates a execution strategy that uses the provided exception handler

Method Summary

Modifier and Type	Method	Description
java.util.concurrent.CompletableFuture<ExecutionResult>	execute(ExecutionContext executionContext, ExecutionStrategyParameters parameters)	This is the entry point to an execution strategy.
java.lang.Object	executePolymorphic(ExecutionContext executionContext, ExecutionStrategyParameters parameters)	This is the re-entry point to an execution strategy.

Methods inherited from class graphql.execution.AbstractAsyncExecutionStrategy

handleResults

Methods inherited from class graphql.execution.ExecutionStrategy

assertNonNullFieldPrecondition, assertNonNullFieldPrecondition, completeField, completeValue, completeValueForEnum, completeValueForList, completeValueForList, completeValueForNull, completeValueForObject, completeValueForScalar, createExecutionStepInfo, fetchField, getFieldDef, getFieldDef, getNormalizedField, handleFetchingException, handleNonNullException, mkNameForPath, mkNameForPath, mkNameForPath, resolveField, resolveFieldWithInfo, resolveType, toIterable, unboxPossibleDataFetcherResult

Methods inherited from class java.lang.Object

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

Constructor Detail

AsyncExecutionStrategy

public AsyncExecutionStrategy()

The standard graphql execution strategy that runs fields asynchronously

AsyncExecutionStrategy

public AsyncExecutionStrategy(DataFetcherExceptionHandler exceptionHandler)

Creates a execution strategy that uses the provided exception handler

Parameters:

exceptionHandler - the exception handler to use

Method Detail

execute

public java.util.concurrent.CompletableFuture<ExecutionResult> execute(ExecutionContext executionContext,
                                                                       ExecutionStrategyParameters parameters)
                                                                throws NonNullableFieldWasNullException

Description copied from class: ExecutionStrategy

This is the entry point to an execution strategy. It will be passed the fields to execute and get values for.

Specified by:

execute in class ExecutionStrategy

Parameters:

executionContext - contains the top level execution parameters

parameters - contains the parameters holding the fields to be executed and source object

Returns:

a promise to an ExecutionResult

Throws:

NonNullableFieldWasNullException - in the future if a non null field resolves to a null value

executePolymorphic

public java.lang.Object executePolymorphic(ExecutionContext executionContext,
                                           ExecutionStrategyParameters parameters)
                                    throws NonNullableFieldWasNullException

Description copied from class: ExecutionStrategy

This is the re-entry point to an execution strategy. If the engine needs to call bck to the execution strategy (say to complete an object) then it will call this method.

This method can return CompletableFuture<ExecutionResult> or a ExecutionResult depending on whether the fields values are asynchronous or not

Overrides:

executePolymorphic in class ExecutionStrategy

Parameters:

executionContext - contains the top level execution parameters

parameters - contains the parameters holding the fields to be executed and source object

Returns:

a promise to an ExecutionResult or just a ExecutionResult

Throws:

NonNullableFieldWasNullException - in the future if a non-null field resolves to a null value