graphql.execution

Class ExecutorServiceExecutionStrategy

java.lang.Object

graphql.execution.ExecutionStrategy

graphql.execution.ExecutorServiceExecutionStrategy

public class ExecutorServiceExecutionStrategy
extends ExecutionStrategy

ExecutorServiceExecutionStrategy uses an ExecutorService to parallelize the resolve.

Due to the nature of execute(ExecutionContext, GraphQLObjectType, Object, Map) implementation, ExecutorService MUST have the following 2 characteristics:

• 1. The underlying ThreadPoolExecutor MUST have a reasonable maximumPoolSize
• 2. The underlying ThreadPoolExecutor SHALL NOT use its task queue.

Failure to follow 1. and 2. can result in a very large number of threads created or hanging. (deadlock)

See graphql.execution.ExecutorServiceExecutionStrategyTest for example usage.

Field Summary

Fields inherited from class graphql.execution.ExecutionStrategy

fieldCollector, valuesResolver

Constructor Summary

Constructors

Constructor and Description
ExecutorServiceExecutionStrategy(java.util.concurrent.ExecutorService executorService)

Method Summary

Methods

Modifier and Type	Method and Description
ExecutionResult	execute(ExecutionContext executionContext, GraphQLObjectType parentType, java.lang.Object source, java.util.Map<java.lang.String,java.util.List<Field>> fields)

Methods inherited from class graphql.execution.ExecutionStrategy

completeValue, completeValueForEnum, completeValueForList, completeValueForScalar, getFieldDef, resolveField, resolveType, resolveType

Methods inherited from class java.lang.Object

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

Constructor Detail

ExecutorServiceExecutionStrategy

public ExecutorServiceExecutionStrategy(java.util.concurrent.ExecutorService executorService)

Method Detail

execute

public ExecutionResult execute(ExecutionContext executionContext,
                      GraphQLObjectType parentType,
                      java.lang.Object source,
                      java.util.Map<java.lang.String,java.util.List<Field>> fields)

Specified by:

execute in class ExecutionStrategy