Package graphql.execution.preparsed.persisted

Interface PersistedQueryCache

All Known Implementing Classes:

InMemoryPersistedQueryCache

@PublicSpi
public interface PersistedQueryCache

This interface is used to abstract an actual cache that can cache parsed persistent queries.

Method Summary

Modifier and Type	Method	Description
CompletableFuture<PreparsedDocumentEntry>	getPersistedQueryDocumentAsync(Object persistedQueryId, ExecutionInput executionInput, PersistedQueryCacheMiss onCacheMiss)	This is called to get a persisted query from cache.

Method Details

getPersistedQueryDocumentAsync

CompletableFuture<PreparsedDocumentEntry> getPersistedQueryDocumentAsync(Object persistedQueryId,
 ExecutionInput executionInput,
 PersistedQueryCacheMiss onCacheMiss)
                                                                  throws PersistedQueryNotFound

This is called to get a persisted query from cache.

If its present in cache then it must return a PreparsedDocumentEntry where PreparsedDocumentEntry.getDocument() is already parsed and validated. This will be passed onto the graphql engine as is.

If it's a valid query id but its no present in cache, (cache miss) then you need to call back the "onCacheMiss" function with associated query text. This will be compiled and validated by the graphql engine and the PreparsedDocumentEntry will be passed back ready for you to cache it.

If it's not a valid query id then throw a PersistedQueryNotFound to indicate this.

Parameters:

persistedQueryId - the persisted query id

executionInput - the original execution input

onCacheMiss - the call back should it be a valid query id but it's not currently in the cache

Returns:

a promise to parsed and validated PreparsedDocumentEntry where PreparsedDocumentEntry.getDocument() is set

Throws:

PersistedQueryNotFound - if the query id is not know at all and you have no query text