graphql.execution.preparsed.persisted

Class PersistedQuerySupport

java.lang.Object

graphql.execution.preparsed.persisted.PersistedQuerySupport

All Implemented Interfaces:

PreparsedDocumentProvider

Direct Known Subclasses:

ApolloPersistedQuerySupport

@PublicSpi
public abstract class PersistedQuerySupport
extends java.lang.Object
implements PreparsedDocumentProvider

This abstract class forms the basis for persistent query support. Derived classes need to implement the method to work out the query id and you also need a PersistedQueryCache implementation.

See Also:

PreparsedDocumentProvider, GraphQL.Builder.preparsedDocumentProvider(graphql.execution.preparsed.PreparsedDocumentProvider)

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	PERSISTED_QUERY_MARKER In order for ExecutionInput.getQuery() to never be null, use this to mark them so that invariant can be satisfied while assuming that the persisted query id is elsewhere

Constructor Summary

Constructors

Constructor and Description
PersistedQuerySupport(PersistedQueryCache persistedQueryCache)

Method Summary

Modifier and Type	Method and Description
PreparsedDocumentEntry	getDocument(ExecutionInput executionInput, java.util.function.Function<ExecutionInput,PreparsedDocumentEntry> parseAndValidateFunction) This is called to get a "cached" pre-parsed query and if its not present, then the "parseAndValidateFunction" can be called to parse and validate the query.
protected abstract java.util.Optional<java.lang.Object>	getPersistedQueryId(ExecutionInput executionInput) This method is required for concrete types to work out the query id (often a hash) that should be used to look up the persisted query in the cache.
protected PreparsedDocumentEntry	mkMissingError(PersistedQueryNotFound persistedQueryNotFound) Allows you to customize the graphql error that is sent back on a missing persistend query

Methods inherited from class java.lang.Object

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

Field Detail

PERSISTED_QUERY_MARKER

public static final java.lang.String PERSISTED_QUERY_MARKER

In order for ExecutionInput.getQuery() to never be null, use this to mark them so that invariant can be satisfied while assuming that the persisted query id is elsewhere

See Also:

Constant Field Values

Constructor Detail

PersistedQuerySupport

public PersistedQuerySupport(PersistedQueryCache persistedQueryCache)

Method Detail

getDocument

public PreparsedDocumentEntry getDocument(ExecutionInput executionInput,
                                          java.util.function.Function<ExecutionInput,PreparsedDocumentEntry> parseAndValidateFunction)

Description copied from interface: PreparsedDocumentProvider

This is called to get a "cached" pre-parsed query and if its not present, then the "parseAndValidateFunction" can be called to parse and validate the query.

Note - the "parseAndValidateFunction" MUST be called if you dont have a per parsed version of the query because it not only parses and validates the query, it invokes Instrumentation calls as well for parsing and validation. if you dont make a call back on this then these wont happen.

Specified by:

getDocument in interface PreparsedDocumentProvider

Parameters:

executionInput - The ExecutionInput containing the query

parseAndValidateFunction - If the query has not be pre-parsed, this function MUST be called to parse and validate it

Returns:

an instance of PreparsedDocumentEntry

getPersistedQueryId

protected abstract java.util.Optional<java.lang.Object> getPersistedQueryId(ExecutionInput executionInput)

This method is required for concrete types to work out the query id (often a hash) that should be used to look up the persisted query in the cache.

Parameters:

executionInput - the execution input

Returns:

an optional id of the persisted query

mkMissingError

protected PreparsedDocumentEntry mkMissingError(PersistedQueryNotFound persistedQueryNotFound)

Allows you to customize the graphql error that is sent back on a missing persistend query

Parameters:

persistedQueryNotFound - the missing persistent query exception

Returns:

a PreparsedDocumentEntry that holds an error