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Apollo Kotlin 5

Apollo Kotlin 5 is an incremental evolution of Apollo Kotlin 4, with a new normalized cache, rewritten WebSockets, and removed deprecated artifacts.

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Field note

What it does

Apollo Kotlin 5 is a GraphQL client for Kotlin and Android. This migration guide covers changes from v4 to v5, including new normalized cache, WebSocket rewrite, removal of deprecated Gradle tasks and artifacts, and changes to nullability handling.

Capabilities

Available capabilities

GraphQL Client Normalized Cache Nullability Handling WebSocket Support

Data Builders

Data Builders have been modified (details not provided).

Gradle Plugin Classloader Isolation

Apollo Gradle Plugin now uses classloader isolation and ServiceLoader API for compiler plugins.

New Normalized Cache

Replaced by a new implementation with pagination, expiration, garbage collection, trimming, and partial results.

Nullability Handling

Introduced @semanticNonNull and @catch for better nullability handling.

Removed Deprecated Artifacts

Removed apollo-gradle-plugin-external, downloadApolloSchema, apollo-idling-resource, and deprecated apollo-http-cache.

Rewritten WebSockets

WebSocket code rewritten with new package and default protocol graphql-ws.

Semantic NonNull

Fields nullable only for error reasons can be marked with @semanticNonNull and handled with @catch.