Package graphql.execution.instrumentation.dataloader

Class PerLevelDataLoaderDispatchStrategyWithDeferAlwaysDispatch

java.lang.Object

graphql.execution.instrumentation.dataloader.PerLevelDataLoaderDispatchStrategyWithDeferAlwaysDispatch

All Implemented Interfaces:

DataLoaderDispatchStrategy

public class PerLevelDataLoaderDispatchStrategyWithDeferAlwaysDispatch
extends java.lang.Object
implements DataLoaderDispatchStrategy

The execution of a query can be divided into 2 phases: first, the non-deferred fields are executed and only once they are completely resolved, we start to execute the deferred fields. The behavior of this Data Loader strategy is quite different during those 2 phases. During the execution of the deferred fields the Data Loader will not attempt to dispatch in a optimal way. It will essentially dispatch for every field fetched, which is quite ineffective. This is the first iteration of the Data Loader strategy with support for @defer, and it will be improved in the future.

Field Summary

Fields inherited from interface graphql.execution.DataLoaderDispatchStrategy

NO_OP

Constructor Summary

Constructors

Constructor	Description
PerLevelDataLoaderDispatchStrategyWithDeferAlwaysDispatch(ExecutionContext executionContext)

Method Summary

Modifier and Type	Method	Description
void	executeDeferredOnFieldValueInfo(FieldValueInfo fieldValueInfo, ExecutionStrategyParameters executionStrategyParameters)
void	executeObject(ExecutionContext executionContext, ExecutionStrategyParameters parameters)
void	executeObjectOnFieldValuesException(java.lang.Throwable t, ExecutionStrategyParameters parameters)
void	executeObjectOnFieldValuesInfo(java.util.List<FieldValueInfo> fieldValueInfoList, ExecutionStrategyParameters parameters)
void	executionStrategy(ExecutionContext executionContext, ExecutionStrategyParameters parameters)
void	executionStrategyOnFieldValuesException(java.lang.Throwable t)
void	executionStrategyOnFieldValuesInfo(java.util.List<FieldValueInfo> fieldValueInfoList)
void	fieldFetched(ExecutionContext executionContext, ExecutionStrategyParameters parameters, DataFetcher<?> dataFetcher, java.lang.Object fetchedValue)

Methods inherited from class java.lang.Object

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

Methods inherited from interface graphql.execution.DataLoaderDispatchStrategy

executionSerialStrategy, modifyDataFetcher

Constructor Detail

PerLevelDataLoaderDispatchStrategyWithDeferAlwaysDispatch

public PerLevelDataLoaderDispatchStrategyWithDeferAlwaysDispatch(ExecutionContext executionContext)

Method Detail

executeDeferredOnFieldValueInfo

public void executeDeferredOnFieldValueInfo(FieldValueInfo fieldValueInfo,
                                            ExecutionStrategyParameters executionStrategyParameters)

Specified by:

executeDeferredOnFieldValueInfo in interface DataLoaderDispatchStrategy

executionStrategy

public void executionStrategy(ExecutionContext executionContext,
                              ExecutionStrategyParameters parameters)

Specified by:

executionStrategy in interface DataLoaderDispatchStrategy

executeObject

public void executeObject(ExecutionContext executionContext,
                          ExecutionStrategyParameters parameters)

Specified by:

executeObject in interface DataLoaderDispatchStrategy

executionStrategyOnFieldValuesInfo

public void executionStrategyOnFieldValuesInfo(java.util.List<FieldValueInfo> fieldValueInfoList)

Specified by:

executionStrategyOnFieldValuesInfo in interface DataLoaderDispatchStrategy

executionStrategyOnFieldValuesException

public void executionStrategyOnFieldValuesException(java.lang.Throwable t)

Specified by:

executionStrategyOnFieldValuesException in interface DataLoaderDispatchStrategy

executeObjectOnFieldValuesInfo

public void executeObjectOnFieldValuesInfo(java.util.List<FieldValueInfo> fieldValueInfoList,
                                           ExecutionStrategyParameters parameters)

Specified by:

executeObjectOnFieldValuesInfo in interface DataLoaderDispatchStrategy

executeObjectOnFieldValuesException

public void executeObjectOnFieldValuesException(java.lang.Throwable t,
                                                ExecutionStrategyParameters parameters)

Specified by:

executeObjectOnFieldValuesException in interface DataLoaderDispatchStrategy

fieldFetched

public void fieldFetched(ExecutionContext executionContext,
                         ExecutionStrategyParameters parameters,
                         DataFetcher<?> dataFetcher,
                         java.lang.Object fetchedValue)

Specified by:

fieldFetched in interface DataLoaderDispatchStrategy