A patch version to fix an issue with data builder and multi modules. Many thanks to @agrosner and @eduardb for catching this.

👷‍ All changes

• Fix data builders in multi-modules scenarios (#4402)

This version brings initial support for @defer as well as data builders.

💙️ External contributors

Many thanks to @engdorm, @Goooler, @pt2121 and @StylianosGakis for their contributions!

✨️ [new] @defer support

@defer support is experimental in the Kotlin Client and currently a Stage 2 GraphQL specification draft to allow incremental delivery of response payloads.

@defer allows you to specify a fragment as deferrable, meaning it can be omitted in the initial response and delivered as a subsequent payload. This improves latency for all fields that are not in that fragment. You can read more about @defer in the RFC and contribute/ask question in the @defer working group.

Apollo Kotlin supports @defer by default and will deliver the successive payloads as Flow items. Given the below query:

query GetComputer {
  computer {
    __typename
    id
    ...ComputerFields @defer
  }
}

fragment ComputerFields on Computer {
  cpu
  year
  screen {
    resolution
  }
}

And the following server payloads:

payload 1:

{
  "data": {
    "computer": {
      "__typename": "Computer",
      "id": "Computer1"
    }
  },
  "hasNext": true
}

payload 2:

{
  "incremental": [
    {
      "data": {
        "cpu": "386",
        "year": 1993,
        "screen": {
          "resolution": "640x480"
        }
      },
      "path": [
        "computer",
      ]
    }
  ],
  "hasNext": true
}

You can listen to payloads by using toFlow():

apolloClient.query(query).toFlow().collectIndexed { index, response ->
  // This will be called twice

  if (index == 0) {
    // First time without the fragment
    assertNull(response.data?.computer?.computerFields)
  } else if (index == 1) {
    // Second time with the fragment
    assertNotNull(response.data?.computer?.computerFields)
  }
}

You can read more about it in the documentation.

As always, feedback is very welcome. Let us know what you think of the feature by
either opening an issue on our GitHub repo
, joining the community
or stopping by our channel in the KotlinLang Slack(get your
invite here).

✨️ [new] Data Builders (#4321)

Apollo Kotlin 3.0 introduced test builders. While they are working, they have several limitations. The main one was that being response based, they could generate a lot of code. Also, they required passing custom scalars using their Json encoding, which is cumbersome.

The data builders are a simpler version of the test builders that generate builders based on schema types. This means most of the generated code is shared between all your implementations except for a top level Data {} function in each of your operation:

// Replace
val data = GetHeroQuery.Data {
  hero = humanHero {
    name = "Luke"
  }
} 

// With
val data = GetHeroQuery.Data {
  hero = buildHuman {
    name = "Luke"
  }
} 

✨️ [new] Kotlin 1.7 (#4314)

Starting with this release, Apollo Kotlin is built with Kotlin 1.7.10. This doesn't impact Android and JVM projects (the minimum supported version of Kotlin continues to be 1.5) but if you are on a project using Native, you will need to update the Kotlin version to 1.7.0+.

👷‍ All changes

• fix registering Java scalars. Many thanks @parker for catching this. (#4375)
• Data builders (#4359, #4338, #4331, #4330, #4328, #4323, #4321)
• Add a flag to disable fieldsCanMerge validation on disjoint types (#4342)
• Re-introduce @defer and use new payload format (#4351)
• Multiplatform: add enableCompatibilityMetadataVariant flag (#4329)
• Remove an unnecessary file.source().buffer() (#4326)
• Always use String for defaultValue in introspection Json (#4315)
• Update Kotlin dependency to 1.7.10 (#4314)
• Remove schema and AST from the IR (#4303)

A 2.x maintainance release with a couple of bugfixes. Many thanks to @eduardb for diving into #2818 💙

What's Changed

• Fix converting introspection to SDL by @martinbonnin in https://github.com/apollographql/apollo-kotlin/pull/4316
• Fix writing fragments overwrites cache entries (#2818) by @eduardb in https://github.com/apollographql/apollo-kotlin/pull/4358

Full Changelog: https://github.com/apollographql/apollo-kotlin/compare/v2.5.12...v2.5.13

With this release, Apollo Kotlin now uses Kotlin Native's new memory model. It also contains a number of other improvements and bug fixes.

💙️ External contributors

Many thanks to @glureau for carefully adding new watch targets ⌚💙

✨️ [new] Kotlin Native: new memory manager (#4287)

Apollo Kotlin is now requiring applications to use the new memory manager, a.k.a. new memory model. Thanks to this change, the restriction that operations had to be executed from the main thread on Apple targets is now removed. You can also use kotlinx.coroutines.test.runTest. Last but not least, benchmarks seem to indicate that performance is better under the new memory manager!

✨️ [new] @targetName directive (#4243)

This directive was introduced in v3.3.1 to allow overriding the name of enum values in the generated code. It has now been extended to allow configuring the generated name of Interfaces, Enums, Unions, Scalars and Input objects. This can be used to make the generated code nicer to use, or to avoid name clashes with Kotlin types (e.g. Long) in Kotlin Native.

✨️ [new] Automatic resolution of Apollo artifacts versions from the plugin version (#4279)

From now on, you no longer need to specify explicitly the versions of Apollo dependencies: if omitted, the same version as the Apollo Gradle plugin will be used. This should facilitate upgrades and avoid potential mistakes:

plugins {
  plugins {
    id("org.jetbrains.kotlin.jvm").version("1.7.10")
    id("com.apollographql.apollo3").version("3.5.0")
  }

  dependencies {
    // Replace this
    // implementation("com.apollographql.apollo3:apollo-runtime:3.5.0")
    
    // with
    implementation("com.apollographql.apollo3:apollo-runtime")
  }
}

🚧 [deprecated] runTest (#4292)

With the new memory model, Apollo's specific runTest method from apollo-testing-support is no longer useful and has been deprecated. If you were using it, you should now be able to use Kotlin's runTest instead, or simply runBlocking.

🚧 [breaking] Automatic detection of type enum values.

If you have an enum with a type value, this value used to name clash with the generated type property. This version now detects this case automatically and escapes type to type_. If you had previously used @targetName to workaround this issue, you can now remove it to avoid it being escaped twice:

# Remove this
extend enum SomeEnum {
  type @targetName(name: "type_")
}

👷‍ All changes

• Support watchosArm32 (#4260)
• Support @targetName on Interfaces, Enums, Unions, Scalars and Input objects (#4243)
• 🐘 support lazy APIs for newer AGP versions (#4264)
• Pagination: add connectionFields argument to @typePolicy (#4265)
• 🐘 Get the dependencies version from the plugin automagically (#4279)
• Automatically escape type in enum values (#4295)
• Fix inferred variables in both nullable and non-nullable locations (#4306)
• Native: assume New Memory Manager (#4287)
• Use internal runTest in all tests (#4292)

Version 3.4.0

2022-07-11

This release contains a few important bug fixes (#4214, #4224, #4247, #4256) and makes it possible to compile with Gradle 7.4 and apollo-gradle-plugin (#4218).

It also introduces incubating cache artifacts.

💙️ External contributors

Many thanks to @ArjanSM, @zebehringer, @mm-kk-experiments, @mune0903, @stengvac, @elenigen, @shamsidinb and @StylianosGakis for the awesome contributions 😃!

✨️ [new] incubating cache artifacts.

This version introduces the below artifacts:

• apollo-normalized-cache-incubating
• apollo-normalized-cache-api-incubating
• apollo-normalized-cache-sqlite-incubating

These artifacts introduce new APIs to work with cache expiration and pagination (as well as other cache improvements in the future).

These artifacts have no backward compatibility guarantees and most likely have worse performance than the non-incubating artifacts. Documentation will be added once the API stabilize. In the short term, the best place to look for examples are the integration tests:

• Expiration tests
• Pagination tests

Note: The experimental withDates: Boolean argument was introduced in 3.3.1 in the regular artifacts and is removed as part of this release. Use the incubating artifacts to use it.

👷‍ All changes

• add TrimmableNormalizedCacheFactory (#4239)
• 🚧 remove withDates (#4257)
• 🗄️ Chunk parameters in large responses (#4256)
• Fix for improper handling of JsonNumber in BufferedSinkJsonWriter (#4247)
• Incubating modules for the next gen cache (#4241)
• Pagination: fixes in FieldRecordMerger and MemoryCache (#4237)
• make it possible to reuse a File Upload (#4228)
• Persist Record arguments/metadata with the SQL Json backend (#4211)
• requestedDispatcher -> dispatcher (#4220)
• Fix test errors were emitted outside the Flow (#4224)
• Make it possible to compile with Kotlin 1.5 and apollo-gradle-plugin (#4218)
• 🏖️ Relax MapJsonReader endObject, fixes reading inline + named fragments with compat models (#4214)
• Introduce RecordMerger (#4197)
• Add @typePolicy(embeddedFields: String! = "") (#4196)

This is a hot fix release that fixes a crash that could happen in the codegen when using responseBased codegen in a
multimodule setup. It also includes a fix for incorrect generated code when using certain reserved names in enum values.

👷‍ All changes

• Update to KotlinPoet 1.12.0, fixes generating enum values whose name clashes with other symbols (#4034)
• Update to Ktor 2 (#4190)
• Fix NPE in checkCapitalizedFields (#4201)

Version 2.5.12 is a maintenance release with a fix to restore downloading schemas as SDL, and a fix for Kotlin 1.7 compatibility.

💜 Many thanks to @eg-ndobrijevic and @remcomokveld for raising these issues! 💜

👷 All Changes

• [2.x] restore SDL download (#4046)
• Fix Kotlin 1.7 compatibility (#4187)

This release introduces @typePolicy on interface/enums, improvements on subscription error handling, and on Test Builders. It also contains a number of other improvements and bug fixes!

✨️ [new] @typePolicy on interfaces and unions (#4131)

The @typePolicy directive can now be declared on interfaces and unions. Thank you @bubba for the contribution!

🔌 WebSockets / Subscriptions error handling (#4147)

An issue where websocketReopenWhen was not called in some cases was fixed. Also, this release introduces SubscriptionOperationException. A SubscriptionOperationException will be thrown instead of the more generic ApolloNetworkError if a subscription fails due to a specific operation error.

📐 Test Builders improvements and fixes

• A DslMarker was added to improve usage with nested builders (#4089)
• When calling a builder, but not assigning it to a field, an error is now thrown, preventing mistakes (#4122)
• The error message displayed when __typename is missing was made clearer (#4146)
• Fix: use rawValue instead of name for enums (#4121)

✨️ [new] ApolloClient implements Closable (#4142)

ApolloClient now implements okio.Closable so you can use use with it. Thanks @yogurtearl for this contribution!

✨️ [new] experimental @targetName directive on enum values (#4144)

If an enum value name is clashing with a reserved name (e.g. type) you can now use this directive to instruct the codeGen to use the specified name for the value instead. This directive is experimental for now.

✨️ [new] experimental support for renaming directives (#4174)

As we add more client directives, the risk of nameclash with existing schema directives increases. If this happens, you can now import Apollo client directives using @link:

# extra.graphqls
extend schema @link(url: "https://specs.apollo.dev/kotlin_labs/v0.1") 

This adds a @kotlin_labs__ prefix to all Apollo client directives:

{
  hero {
    name @kotlin_labs__nonnull
  }
}

🤖 SqlNormalizedCacheFactory initialization on Android (#4104)

It is no longer necessary to pass a Context when initializing the SqlNormalizedCacheFactory on Android. A Context is automatically provided, via App Startup.

// Before
val sqlNormalizedCacheFactory = SqlNormalizedCacheFactory(context, "apollo.db")
// After
val sqlNormalizedCacheFactory = SqlNormalizedCacheFactory("apollo.db")

📝 [new] Public API tracking

This release starts tracking the public API of all modules, including MockServer. Even if the API remains experimental, we'll try to keep the number of breaking changes low in the future.

👷‍ All changes

• 🐘 publish apollo-gradle-plugin-external (#4078)
• publish the R8 mapping file along the relocated jar (#4085)
• Fix test directories not cleared (#4083)
• Do not use 'header' as a enum value name as it breaks the Kotlin compiler (#4086)
• 🧪 @experimental support (#4091)
• @experimental -> @requiresOptIn (#4175)
• Do not buffer entire body in Http Cache (#4076)
• ⬇️ add SchemaDownloader.download() (#4088)
• add DslMarker for test builders (#4089)
• MockServer: make MockResponse.body a Flow (#4096)
• Issue-3909: add ApolloResponse cache headers (#4102)
• Use rawValue instead of name for enums in test builders (#4121)
• 💧 first drop for a SQLite backend that stores when each field was last updated (#4104)
• Add Operation.Data.toJsonString() convenience function for the jvm (#4124)
• Check for unassigned fields in Test Builders (#4122)
• Add non-breaking spaces after 'return' (#4127)
• 🧶 Use a getter instead of a const val OPERATION_QUERY (#4130)
• Uploads should be read only once even when logging (#4125)
• Keep the 'interfaces' field on the JSON introspection (#4129)
• Allow @typePolicy directive on interfaces and unions (#4131)
• typePolicy on interface: exclude empty keyfields (#4140)
• Sort the type names in the list so the code gen is deterministic. (#4138)
• Use okio.Closable.close instead of dispose on ApolloClient (#4142)
• Parse the interface's interface field in introspection (#4143)
• TestBuilders: improve error message when __typename is missing (#4146)
• Do not bypass websocketReopenWhen {} (#4147)
• SDLWriter: join implemented interfaces with & instead of space (#4151)
• Escape "type" in enums and sealed classes (#4144)
• 🧰 introduce apollo-tooling and apollo-cli (#4153)
• Fix incorrect content-length in MockServer (#4162)
• Allow capitalized field names if flattenModels is true (#4154)
• 🏷️ Allow namespacing and renaming of directives (#4174)

❤️ External contributors

Many thanks to @tajchert, @asimonigh, @hrach, @ArjanSM, @yshrsmz, @ephemient, @bubba, @eboudrant and @yogurtearl for contributing to this release! 🙏

This is the first release with HMPP support. If you're using multiplatform, updating to Kotlin 1.6.21 is strongly encouraged.

This release also brings WebSocket related improvements and other fixes!

✨️ [new] Hierarchical MultiPlatform Project (HMPP) (#4033)

When using Apollo Kotlin on a multiplatform project, this release is compatible with the hierarchical project structure, which makes it easier to share common code among several targets. Using HMPP in your project also fixes some issues when compiling Kotlin metadata. See https://github.com/apollographql/apollo-kotlin/issues/4019 and https://youtrack.jetbrains.com/issue/KT-51970/ for more details.

✋ Note: If you're using multiplatform, we strongly encourage updating to Kotlin 1.6.21. If that is not an option, you might have issues resolving dependencies. More infos in this issue.

✨️ [new] WebSocketNetworkTransport.closeConnection (#4049)

This new method can be used in conjunction with reopenWhen to force a reconnection to the server. This could be useful for instance when needing to pass new auth tokens in the headers. If you were using subscriptionManager.reconnect() in 2.x, closeConnection is a simple way to achieve the same behaviour.

✨️ [new] GraphQLWsProtocol.connectionPayload is now a lambda (#4043)

With GraphQLWsProtocol, if you need to pass parameters to the connection payload, previously you would pass them as a static map to the builder. With this change you can now pass a lambda providing them as needed. This facilitates passing fresh auth tokens when connecting.

✨️ [new] Add insecure option to download schema (#4021)

You can now use the --insecure flag when downloading a schema with downloadApolloSchema, to bypass the certificate check, which can be useful if a server is configured with a self-signed certificate for instance.

👷‍ All changes

• Add WebSocketNetworkTransport.closeConnection (#4049)
• Made connectionPayload as suspend function in GraphQLWsProtocol (#4043)
• ⚡ Ignore unknown websocket messages (#4066)
• Kotlin 1.6.21 & HMPP (#4033)
• Provide a Content-Length when using Upload (#4056)
• ☁️ add HttpRequest.newBuilder(url, method) (#4038)
• Escape enum constants (#4035)
• Fix the Moshi adapter used for OperationOutput. Moshi cannot get the type parameters from the typealias
  automagically (#4022)
• Add insecure option to download schema (#4021)
• Try to reduce allocations in MapJsonReader (#3935)
• 🔒 Deprecate BearerTokenInterceptor and provide tests and docs instead (#4068)

❤️ External contributors

Many thanks to @CureleaAndrei and @kdk96 for contributing to this release! 🙏

⚙️ Deprecations

• BearerTokenInterceptor was provided as an example but is too simple for most use cases, and has therefore been deprecated
  in this release. This page provides more details
  about authentication.
• The previous ways of passing parameters to the connection payload with GraphQLWsProtocol has been deprecated (see above).

Version 3.2.2

Many thanks to @benedict-lim, @olivierg13, @konomae and @sproctor for their contributions 💙

3.2.2 is a maintenance release to fix the addJvmOverloads option added in 3.2.0 as well as other fixes. If you're using APQs, the mutations are now always send using POST. See #4006 for details and a way to override the behaviour if you need to.

👷‍ All changes

• Use a constant for JvmOverloads to avoid a crash due to relocation (#4008)
• Always use POST for Mutations in APQs (Auto Persisted Queries) (#4011)
• Add configurable headers to WebSocketNetworkTransport (#3995)
• Handle SqlNormalizedCache merge APIs Exceptions with ApolloExceptionHandler (#4002)
• Add adapter for java.time.OffsetDateTime (#4007)
• ⏰ Add tests for date adapters (#3999)
• Fix wrong LocalDate and LocalDateTime formats in JavaTimeAdapters (#3997)

This release introduces a few improvements and bug fixes.

✨️ [new] ApolloCall<D>.emitCacheMisses(Boolean) (#3980)

When observing the cache with watch, the behavior was to not emit cache misses at all, which may not desirable in certain cases. With this new option, you can now choose to emit them: in that case responses will be emitted with a null data.

This can be used like so:

apolloClient.query(query)
  .fetchPolicy(FetchPolicy.CacheOnly)
  .emitCacheMisses(true)
  .watch()
  .collect { response ->
    // response.data will be null in case of cache misses
  }

This is also closer to the behavior that was in place in v2. Many thanks to @mateuszkwiecinski for the insights and raising the issue!

⚙️ [breaking] Allow configuration of frame types used in SubscriptionWsProtocol and default to Text (#3992)

When using subscriptions over WebSockets with SubscriptionWsProtocol (the default), the frames were sent in the binary format. It was reported that this was not compatible with certain servers (DGS, graphql-java-kickstart) that are expecting text frames. This is now fixed and the default is to send text frames.

⚠️ This may be a breaking change if your server expects binary frames only!
If that is the case, you can use the new frameType option to configure the frame type to be sent:

client = ApolloClient.Builder()
  .webSocketServerUrl("wss://...")
  .wsProtocol(GraphQLWsProtocol.Factory(frameType = WsFrameType.Binary))
  .build()

Many thanks to @Krillsson and @aviewfromspace1 for the insights and raising the issue!

👷‍ All changes

• Allow configuration of frame types used in SubscriptionWsProtocol and default to Text (#3992)
• add ApolloRequest.newBuilder(operation: Operation<E>) (#3988)
• Add exception handlers to ApolloCacheInterceptor and SqlNormalizedCache (#3989)
• 📠 Fix some @DeprecatedSince annotations (#3983)
• 👓 add ApolloCall.emitCacheMisses(Boolean) (#3980)
• ⚙️ Fix fragments on the root query type in operationBased codegen (#3973)

❤️ External contributors

Many thanks to @AdamMTGreenberg and @Krillsson for the contributions! 🙏

💙 Thanks to @undermark5, @demoritas, @rkoron007, @akshay253101, @StylianosGakis, @Goooler, @jeffreydecker, @theBradfo, @anderssandven and @olivierg13 for contributing to this release.

This version adds JS WebSocket support, more options to deal with __typename amongst other features and bugfixes.

✨️ [new] JS WebSocket support (#3913)

Version 3.2.0 now has WebSocket support for Javascript targets courtesy of @undermark5! This is a huge milestone and means the JS target is now even closer to its JVM and iOS counterparts.

The implementation is based on the ws library on Node and the WebSocket API on the browser and inspired by Ktor.

✨️ [new] Fine grained __typename control (#3939)

This version generates non-nullable fragments when it knows the fragment is always present:

{
  cat {
    # Because Animal is a supertype of Cat this condition will always be true
    ... on Animal {
      species
    }
  }
}

In addition, it introduces a addTypename Gradle option to have better control over when to add the __typename field:

/**
 * When to add __typename. One of "always", "ifFragments", "ifAbstract" or "ifPolymorphic"
 *
 * - "always": Add '__typename' for every compound field
 *
 * - "ifFragments": Add '__typename' for every selection set that contains fragments (inline or named)
 * This is adding a lot more '__typename' than the other solutions and will be certainly removed in
 * a future version. If you require '__typename' explicitly, you can add it to your queries.
 * This causes cache misses when introducing fragments where no fragment was present before and will be certainly removed in
 * a future version.
 *
 * - "ifAbstract": Add '__typename' for abstract fields, i.e. fields that are of union or interface type
 * Note: It also adds '__typename' on fragment definitions that satisfy the same property because fragments
 * could be read from the cache and we don't have a containing field in that case.
 *
 * - "ifPolymorphic": Add '__typename' for polymorphic fields, i.e. fields that contains a subfragment
 * (inline or named) whose type condition isn't a super type of the field type.
 * If a field is monomorphic, no '__typename' will be added.
 * This adds the bare minimum amount of __typename but the logic is substantially more complex and
 * it could cause cache misses when using fragments on monomorphic fields because __typename can be
 * required in some cases.
 *
 * Note: It also adds '__typename' on fragment definitions that satisfy the same property because fragments
 * could be read from the cache and we don't have a containing field in that case.
 *
 * Default value: "ifFragments"
 */

You can read more in the corresponding Typename.md design document.

✨️ [new] Maven publishing for multi-module apollo metadata (#3904)

The Apollo Gradle plugin now creates a new "apollo" publication if maven-publish is found. This means you can now publish the Apollo metadata to a maven repository:

# In your producer project
./gradlew publishApolloPublicationTo[SomeRepository]

Assuming your producer project is using com.example:project:version for maven coordinates, the Apollo metadata will be published at com.example:project-apollo:version:

// In your consumer project
dependencies {
  implementation("com.example:project:version")
  apolloMetadata("com.example:project-apollo:version")
}

Note: There are absolutely no forward/backward compatibility guarantees for Apollo metadata yet. The Apollo version used in the consumer must be the same as the one used in the producer.

✨️ [new] addJvmOverloads Gradle option (#3907)

For better Java interop, you can now opt-in addJvmOverloads. addJvmOverloads will add the @JvmOverloads to your Kotlin operations:

@JvmOverloads
class GetHeroQuery(val id: String, val episode: Optional<Episode> = Optional.Absent) {
  // ...
}

Meaning you can now create a new query from Java without having to specify episode: new GetHeroQuery("1002")

👷‍ All changes

• 📖 Add note to tutorial about graphql-ws library to tutorial (#3961)
• Use ApolloCompositeException for HTTP CachePolicies (#3967)
• 🖋️ bump kotlin poet to 1.11.0 (#3970)
• Add underlying exceptions as suppressed exceptions in ApolloCompositeException (#3957)
• Add macosArm64 and macosX64 targets (#3954)
• JS Websockets: handle remote close (#3952)
• ⚙️ Introduce addTypename Gradle parameter (#3939)
• Optimize CI a bit (#3942)
• Add more field merging diagnostics (#3937)
• ⚙️ Make adapters code work without relying on having a __typename IrProperty (#3930)
• Add equals and hashCode implementations for models with no properties (#3928)
• 🐘 Unbreak Gradle configuration cache (#3918)
• WebSocket support for JS targets (#3913)
• 🗄️ add apolloClient.httpCache (#3919)
• ⚙️ Detect case insensitive filesystems (like MacOS default one) and rename classes when that happens (#3911)
• Fix exceptions where not caught when reading the body of a batched query (#3910)
• 🗄️ Fix writing fragments programmatically was using the wrong cache key (#3905)
• 📦 Maven publishing for Apollo metadata (#3904)
• Add addJvmOverloads Gradle option for better Java interop (#3907)
• 🐘 Fix using refreshVersions (#3898)
• add support for triple quotes escapes (#3895)
• 👷 Test Builders: Fix enums in test resolver (#3894)
• Validation: Detect missing arguments when there are no arguments at all (#3893)
• Add support for receiving multiple bodies with multipart (#3889)
• ✅ Validation: allow nullable variables in non-null locations if there is a default value (#3879)
• 🗄️ HttpCache: do not cache mutations by default (#3873)
• Chunked Transfer-Encoding support in MockServer (#3870)
• Fix -1 body length in BatchingHttpInterceptor (#3874)
• Fix issue in Java codegen where selectors returned ImmutableMapBuilder instances instead of Map (#3861)
• Make watchers subscribe to the store earlier (#3853)

Version 3.1.0 introduces new APIs for testing, mapping scalars as well a redesigned cache pipeline.
It also contains bugfixes around the @include directives, MemoryCache and GraphQL validation amongst other changes.

⚙️ [breaking] Fragment package name and useSchemaPackageNameForFragments (#3775)

If you're using packageNameFromFilePath(), the package name of generated fragment classes has changed.

Different generated types have different package names:

• Generated types coming from operations are generated based on the operation path
• Generated types coming from the schema (input objects, custom scalars and enums) are generated based on the schema path

Previously, fragments were using the schema path which is inconsistent because fragments are not defined in the schema but are executable files, like operations.

Version 3.1.0 now uses the same logic for fragments as for operations. To revert to the previous behaviour, you can use useSchemaPackageNameForFragments:

apollo {
  useSchemaPackageNameForFragments.set(true)
}

This is also done automatically if you're using useVersion2Compat(). Moving forward, the plan is to remove useSchemaPackageNameForFragments in favor of setting a custom PackageNameGenerator. If you have use cases that require useSchemaPackageNameForFragments, please reach out.

✨ [New] QueueTestNetworkTransport (#3757)

3.1.0 introduces QueueTestNetworkTransport to test at the GraphQL layer without needing to run an HTTP server.

To use it, configure your ApolloClient:

// This uses a QueueTestNetworkTransport that will play the queued responses
val apolloClient = ApolloClient.Builder()
    .networkTransport(QueueTestNetworkTransport())
    .build()

You can then use the enqueueTestResponse extension function to specify the GraphQL responses to return:

val testQuery = GetHeroQuery("001")
val testData = GetHeroQuery.Data {
  hero = droidHero {
    name = "R2D2"
  }
}
apolloClient.enqueueTestResponse(testQuery, testData)
val actual = apolloClient.query(testQuery).execute().data!!
assertEquals(testData.hero.name, actual.hero.name)

✨ [New] MockServerHandler (#3757)

If you're testing at the HTTP layer, you can now define your own MockServerHandler to customize how the server is going to answer to requests:

val customHandler = object : MockServerHandler {
  override fun handle(request: MockRequest): MockResponse {
    return if (/* Your custom logic here */) {
      MockResponse(
          body = """{"data": {"random": 42}}""",
          headers = mapOf("X-Test" to "true"),
      )
    } else {
      MockResponse(
          body = "Internal server error",
          statusCode = 500,
      )
    }
  }
}
val mockServer = MockServer(customHandler)

✨ [New] FetchPolicy.CacheAndNetwork (#3828)

Previously, FetchPolicys were limited to policies that emitted at most one response. There was a executeCacheAndNetwork() method but it felt asymmetrical. This version introduces FetchPolicy.CacheAndNetwork that can emit up to two responses:

apolloClient.query(query)
  // Check the cache and also use the network (1 or 2 values can be emitted)
  .fetchPolicy(FetchPolicy.CacheAndNetwork)
  // Execute the query and collect the responses
  .toFlow().collect { response ->
      // ...
  }

✨ [New] ApolloCall<D>.fetchPolicyInterceptor(interceptor: ApolloInterceptor) (#3743)

If you need more customized ways to fetch data from the cache or more fine-grained error handling that does not come with the built-in FetchPolicy, you can now use fetchPolicyInterceptor:

// An, interceptor that will only use the network after getting a successful response
val refetchPolicyInterceptor = object : ApolloInterceptor {
  var hasSeenValidResponse: Boolean = false
  override fun <D : Operation.Data> intercept(request: ApolloRequest<D>, chain: ApolloInterceptorChain): Flow<ApolloResponse<D>> {
    return if (!hasSeenValidResponse) {
      CacheOnlyInterceptor.intercept(request, chain).onEach {
        if (it.data != null) {
          // We have valid data, we can now use the network
          hasSeenValidResponse = true
        }
      }
    } else {
      // If for some reason we have a cache miss, get fresh data from the network
      CacheFirstInterceptor.intercept(request, chain)
    }
  }
}

apolloClient.query(myQuery)
    .refetchPolicyInterceptor(cacheOnlyInterceptor)
    .watch()
    .collect {
      //
    }

✨ [New] Service.mapScalar Gradle API (#3779)

You can now use mapScalar to specify your scalar mappings:

apollo {
  // Replace 
  customScalarsMapping.set(mapOf(
      "Date" to "java.util.Date"
  ))
  
  // With
  mapScalar("Date", "java.util.Date")
}

mapScalar also works with built-in scalar types so you can map the ID type to a kotlin Long:

apollo {
  // This requires registering an adapter at runtime with `addCustomScalarAdapter()` 
  mapScalar("ID", "kotlin.Long")
}

As an optimization, you can also provide the adapter at compile time. This will avoid a lookup at runtime everytime such a scalar is read:

apollo {
  // No need to call `addCustomScalarAdapter()`, the generated code will use the provided adapter 
  mapScalar("ID", "kotlin.Long", "com.apollographql.apollo3.api.LongAdapter")
}

For convenience, a helper function is provided for common types:

apollo {
  // The generated code will use `kotlin.Long` and the builtin LongAdapter 
  mapScalarToKotlinLong("ID")

  // The generated code will use `kotlin.String` and the builtin StringAdapter
  mapScalarToKotlinString("Date")

  // The generated code will use `com.apollographql.apollo3.api.Upload` and the builtin UploadAdapter
  mapScalarToUpload("Upload")
}

🚧 [Changed] convertApolloSchema and downloadApolloSchema now use paths relative to the root of the project (#3773, #3752)

Apollo Kotlin adds two tasks to help to manage schemas: convertApolloSchema and downloadApolloSchema. These tasks are meant to be used from the commandline.

Previously, paths were interpreted using the current working directory with File(path). Unfortunately, this is unreliable because Gradle might change the current working directory in some conditions (see Gradle#13927 or Gradle#6074 for an example).

With 3.1.0 and onwards, paths, will be interpreted relative to the root project directory (project.rootProject.file(path)):

# schema is now interpreted relative to the root project directory and
# not the current working directory anymore. This example assumes there 
# is a 'app' module that applies the apollo plugin
./gradlew downloadApolloSchema \
  --endpoint="https://your.domain/graphql/endpoint" \
  --schema="app/src/main/graphql/com/example/schema.graphqls"

❤️ External contributors

Many thanks to @dhritzkiv, @mune0903, @StylianosGakis, @AchrafAmil and @jamesonwilliams for their awesome contributions! You rock 🎸 🤘 !

👷 All changes

• Fix error reporting when there is a "schema.graphqls" but it doesn't contain any type definition (#3844)
• Make guessNumber read the next value only once, fixes parsing custom scalars without a custom adapter (#3839, #3836)
• Clarify need to pass client's customScalarAdapters to store methods (#3838)
• Fix null pointer exception in LruCache while trimming (#3833)
• Add FetchPolicy.CacheAndNetwork (#3828)
• Allow to specify error handling for watch() (#3817)
• Scalar mapping and adapter configuration improvements (#3779)
• Tunnel variables in CustomScalarAdapters (#3813)
• Terminate threads correctly if no subscription has been executed (#3803)
• fix validation of merged fields (#3799)
• Make reconnectWhen suspend and pass attempt number (#3772)
• Merge HTTP headers when batching (#3776)
• MockServer improvements and TestNetworkTransport (#3757)
• Fix calling ApolloClient.newBuilder() if the original ApolloClient used .okHttpClient (#3771)
• Make convertApolloSchema and downloadApolloSchema use path from the root of the project (#3773, #3752)
• fix fragment package name in multi-module scenarios (#3775)
• Make the error printer robust to unknown source locations, fixes schemas with duplicate types (#3753)
• Allow to customize the fetchPolicy with interceptors (#3743)

This is the first stable release for Apollo Android 3 Apollo Kotlin 3 🎉!

There is documentation, a migration guide and a blog post.

In a nutshell, Apollo Kotlin 3 brings:

• coroutine APIs for easier concurrency
• multiplatform support makes it possible to run the same code on Android, JS, iOS, MacOS and linux
• responseBased codegen is a new optional codegen that models fragments as interfaces
• SQLite batching makes reading from the SQLite cache significantly faster
• Test builders offer a simple APIs to build fake models for your tests
• The @typePolicy and @fieldPolicy directives make it easier to define your cache ids at compile time
• The @nonnull directive catches null values at parsing time, so you don't have to deal with them in your UI code

Feel free to ask questions by either opening an issue on our GitHub repo, joining the community or stopping by our channel in the KotlinLang Slack(get your invite here).

Changes compared to 3.0.0-rc03:

• Fix rewinding the Json stream when lists are involved (#3727)
• Kotlin 1.6.10 (#3723)
• Disable key fields check if unnecessary and optimize its perf (#3720)
• Added an easy way to log cache misses (#3724)
• Add a Data.toJson that uses reflection to lookup the adapter (#3719)
• Do not run the cache on the main thread (#3718)
• Promote JsonWriter extensions to public API (#3715)
• Make customScalarAdapters and subscriptionsNetworkTransport public (#3714)

Compared to the previous RC, this version adds a few new convenience API and fixes 3 annoying issues.

💙 Many thanks to @mateuszkwiecinski, @schoeda and @fn-jt for all the feedback 💙

✨ New APIs

• Make ApolloCall.operation public (#3698)
• Add SubscriptionWsProtocolAdapter (#3697)
• Add Operation.composeJsonRequest (#3697)

🪲 Bug fixes

• Allow repeated @fieldPolicy (#3686)
• Fix incorrect merging of nested objects in JSON (#3672)
• Fix duplicate query detection during validation (#3699)

💙 Many thanks to @michgauz, @joeldenke, @rohandhruva, @schoeda, @CoreFloDev and @sproctor for all the feedback 💙

⚙️ [breaking] Merge ApolloQueryCall, ApolloSubscriptionCall, ApolloMutationCall (#3676)

In order to simplify the API and keep the symmetry with ApolloRequest<D> and ApolloResponse<D>, ApolloQueryCall<D, E>, ApolloSubscriptionCall<D, E>, ApolloMutationCall<D, E> are replaced with ApolloCall<D>. This change should be mostly transparent but it's technically a breaking change. If you are passing ApolloQueryCall<D, E> variables, it is safe to drop the second type parameter and use ApolloCall<D> instead.

✨ [New] Add WebSocketNetworkTransport.reconnectWhen {} (#3674)

You now have the option to reconnect a WebSocket automatically when an error happens and re-subscribe automatically after the reconnection has happened. To do so, use the webSocketReconnectWhen parameter:

val apolloClient = ApolloClient.Builder()
    .httpServerUrl("http://localhost:8080/graphql")
    .webSocketServerUrl("http://localhost:8080/subscriptions")
    .wsProtocol(
        SubscriptionWsProtocol.Factory(
            connectionPayload = {
              mapOf("token" to upToDateToken)
            }
        )
    )
    .webSocketReconnectWhen {
      // this is called when an error happens on the WebSocket
      it is ApolloWebSocketClosedException && it.code == 1001
    }
    .build()

Better Http Batching API (#3670)

The HttpBatchingEngine has been moved to an HttpInterceptor. You can now configure Http batching with a specific method:

apolloClient = ApolloClient.Builder()
    .serverUrl(mockServer.url())
    .httpBatching(batchIntervalMillis = 10)
    .build()

All changes:

• Add 2.x symbols (Rx2Apollo, prefetch(), customAttributes(), ApolloIdlingResource.create()) to help the transition (#3679)
• Add canBeBatched var to ExecutionOptions (#3677)
• Merge ApolloQueryCall, ApolloSubscriptionCall, ApolloMutationCall (#3676)
• Add WebSocketNetworkTransport.reconnectWhen {} (#3674)
• Move BatchingHttpEngine to a HttpInterceptor (#3670)
• Add exposeErrorBody (#3661)
• fix the name of the downloadServiceApolloSchemaFromRegistry task (#3669)
• Fix DiskLruHttpCache concurrency (#3667)

This version is the release candidate for Apollo Android 3 🚀. Please try it and report any issues, we'll fix them urgently.

There is documentation and a migration guide. More details are coming soon. In a nutshell, Apollo Android 3 brings, amongst other things:

• coroutine APIs for easier concurrency
• multiplatform support makes it possible to run the same code on Android, JS, iOS, MacOS and linux
• responseBased codegen is a new optional codegen that models fragments as interfaces
• SQLite batching makes reading from the SQLite cache significantly faster
• Test builders offer a simple APIs to build fake models for your tests
• The @typePolicy and @fieldPolicy directives make it easier to define your cache ids at compile time
• The @nonnull directive catches null values at parsing time, so you don't have to deal with them in your UI code

Compared to beta05, this version changes the default value of generateOptionalOperationVariables, is compatible with Gradle configuration cache and fixes a few other issues.

⚙️ API changes

Optional operation variables (#3648) (breaking)

The default value for the generateOptionalOperationVariables config is now true.

What this means:

• By default, operations with nullable variables will be generated with Optional parameters
• You will need to wrap your parameters at the call site

For instance:

query GetTodos($first: Int, $offset: Int) {
  todos(first: $first, offset: $offset) {
    ...Todo
  }
}

// Before
val query = GetTodosQuery(100, null)

// After
val query = GetTodosQuery(Optional.Present(100), Optional.Absent)

• If you prefer, you can set generateOptionalOperationVariables to false to generate non-optional parameters globally
• This can also be controlled on individual variables with the @optional directive
• More information about this can be found here

We think this change will make more sense to the majority of users (and is consistent with Apollo Android v2's behavior) even though it may be more verbose, which is why it is possible to change the behavior via the generateOptionalOperationVariables config.

To keep the beta05 behavior, set generateOptionalOperationVariables to false in your Gradle configuration:

apollo {
  generateOptionalOperationVariables.set(false)
}

ApolloClient.Builder improvements (#3647)

You can now pass WebSocket related options to the ApolloClient.Builder directly (previously this would have been done via NetworkTransport):

// Before
val apolloClient = ApolloClient.Builder()
    // (...)
    .subscriptionNetworkTransport(WebSocketNetworkTransport(
        serverUrl = "https://example.com/graphql",
        idleTimeoutMillis = 1000L,
        wsProtocol = SubscriptionWsProtocol.Factory()
    ))
    .build()

// After
val apolloClient = ApolloClient.Builder()
    // (...)
    .wsProtocol(SubscriptionWsProtocol.Factory())
    .webSocketIdleTimeoutMillis(1000L)
    .build()

Upgrade to OkHttp 4 (#3653) (breaking)

This version upgrades OkHttp to 4.9.3 (from 3.12.11). This means Apollo Android now requires Android apiLevel 21+. As OkHttp 3 enters end of life at the end of the year and the vast majority of devices now support apiLevel 21, we felt this was a reasonable upgrade.

🪲 Bug fixes

• Fixed an issue where it was not possible to restart a websocket after a network error (#3646)
• Fixed an issue where Android Java projects could not use the Apollo Gradle plugin (#3652)

👷 All Changes

• Update a few dependencies (#3653)
• Fix Android Java projects (#3652)
• Expose more configuration options on ApolloClient.Builder (#3647)
• Fix restarting a websocket after a network error (#3646)
• Change optional default value (#3648)
• Fix configuration cache (#3645)

We intended this version to be the first release candidate but we found a few bugs justifying a new beta instead. Many thanks to @CoreFloDev, @olivierg13, @rohandhruva, @adavis and @sproctor for identifying the bugs and sending feedback, this helps a ton 🙏 💙 .
Next one should be release candidate 🤞 🚀

🪲 Bug fixes

• Fix a crash when using Auto Persisted Queries on iOS (#3637)
• Fix a crash that could happen when saving an object to the cache after some types of schema changes (#3636)
• Escape reserved enum value names ("name" and "ordinal") (#3629)
• Do not crash when trying to send to a closed websocket (#3638)

🖋️ Better escaping for Kotlin codegen

The escaping of Kotlin keywords used in field names now uses Kotlin's backtick escaping (`keyword`) convention instead of suffixing an underscore (keyword_). This could impact the generated code in your projects if a schema contains such fields. (#3630)

⚙️ [breaking] API changes

Before going stable, the public API has been tweaked to ensure consistency.

Uniformize Upload creation (#3613)

Creating an Upload used to be possible by calling Upload.fromXyz() methods and now has been changed to use a Builder API which is more consistent with the rest of the API:

// Before
val upload = Upload.fromSource(okioSource)
// or if you're on the JVM
val upload = Upload.fromFile(file)

// After
val upload = DefaultUpload.Builder()
    .content(bufferedSource)
    // or if you're on the JVM
    .content(file)
    .build()

Simplify Automatic Persisted Queries configuration (#3622)

The method to enable or disable Automatic Persisted Queries on a specific call has been renamed to a more meaningful name:

// Before
val response = apolloClient.query(HeroNameQuery())
    .hashedQuery(false)
    .execute()

// After
val response = apolloClient.query(HeroNameQuery())
    .enableAutoPersistedQueries(false)
    .execute()

Remove temporarily deprecated methods (#3632)

During the course of the alpha and beta, a number of APIs have been evolving, and to allow a smooth transition by early adopters, some early APIs have been marked as deprecated in favor of new ones.

Now that we are soon reaching a stable API, it is time to remove these early APIs.

This means if you were using 3.0.0-beta04 or earlier you may want to first review the deprecation warnings and update your code to use the newer APIs, before upgrading to this version.

Other changes

• Should you need to create an ApolloResponse, you can now do so by using a Builder API (#3608)
• Ast, Compiler and MockServer modules have been marked as experimental to reflect the fact that they haven't been widely used as of now and therefore their APIs could evolve in the future (#3614)
• Some overloads were removed in APIs related to JSON parsing/writing to simplify these APIs. Now all of these APIs take an Okio BufferedSource as input. (#3620)
• The actual implementations of HttpEngine (OkHttpEngine, NSURLSessionHttpEngine, and KtorHttpEngine) have all been renamed to DefaultHttpEngine for consistency (#3617)

☕️ Java Interop improvements

• The built-in adapters are now usable in a more Java-friendly way (#3607):

// Before
String result = StringAdapter.INSTANCE.fromJson(jsonReader,CustomScalarAdapters.Empty);

// After
String result = Adapters.StringAdapter.fromJson(jsonReader,CustomScalarAdapters.Empty);

• Correctly declare throwing IOException in Adapter APIs, making it possible to catch it in Java code (#3603)

👷 All Changes

• Do not crash when trying to send to a closed websocket (#3638)
• URLEncode more characters for NSURL to not crash (#3637)
• Fix collecting fields on new schema types (#3636)
• Remove temporarily deprecated methods (#3632)
• Differentiate escaping of Java or Kotlin keywords (#3630)
• Escape reserved enum value names ("name" and "ordinal") (#3629)
• Move the HTTP cache to a HttpInterceptor (#3624)
• Simplify APQ configuration (#3622)
• Cleanup overloads (#3620)
• 🙅 No constructor fun (#3617)
• Mark Ast, Compiler and MockServer modules as experimental (#3614)
• Uniformize Upload creation (#3613)
• 🧼 🪣 Polishing of the ApolloResponse API (#3608)
• Make builtin scalar adapters easier to call from Java (#3607)
• Fix CustomTypeAdapter compat (#3604)
• Use kotlin.Throws (#3603)

This version is planned to be the last beta of Apollo Android 3 before a release candidate 🚀. It mainly focuses on stabilization and tweaks to the public API, makes it easier to work with the Java9 module system, and fixes a few issues.

⚙️ [breaking] API changes

Before going stable, we tweaked the public API to ensure consistency. The following methods have been renamed:

In order to better support Java 9 and remove split packages, the following classes have been moved:

Other renames

Renames in ApolloCall and ApolloClient (#3594)

ApolloClient's mutate and subscribe methods have been renamed to mutation and subscription respectively. This
creates a more consistent API by reusing the GraphQL specification terminology.
Also, mutate(), subscribe() could be misleading as despite being verbs, no action is done until execute() is
called. Using mutation()/subscription() hints that execute() is required as a terminal operation.

// Before
val data = client.mutate(MyMutation()).execute()

// After
val data = client.mutation(MyMutation()).execute()

Also, ApolloSubscriptionCall.execute() has been renamed to ApolloSubscriptionCall.toFlow() to make it clearer that it
returns a cold Flow that can be collected several times:

// Before
val flow = client.subscription(MySubscription).execute()

// After
val flow = client.subscription(MySubscription).toFlow()

Rename ObjectId to CacheKey (#3575)

CacheKeys were sometimes referred to as Cache ids, Object ids, despite all of them being the same concept (the key
of an object in the cache). For consistency inside the Apollo Android codebase and with the iOS and Web
clients, CacheKey is going to be used everywhere moving forward

// Before
val objectIdGenerator = object : ObjectIdGenerator {
  override fun cacheKeyForObject(obj: Map<String, Any?>, context: ObjectIdGeneratorContext): CacheKey? {
    // Retrieve the id from the object itself
    return CacheKey(obj["id"] as String)
  }
}

val apolloClient = ApolloClient.Builder()
    .serverUrl("https://...")
    .normalizedCache(
        normalizedCacheFactory = cacheFactory,
        objectIdGenerator = objectIdGenerator,
    )
    .build()

// After
val cacheKeyGenerator = object : CacheKeyGenerator {
  override fun cacheKeyForObject(obj: Map<String, Any?>, context: CacheKeyGeneratorContext): CacheKey? {
    // Retrieve the id from the object itself
    return CacheKey(obj["id"] as String)
  }
}

val apolloClient = ApolloClient.Builder()
    .serverUrl("https://...")
    .normalizedCache(
        normalizedCacheFactory = cacheFactory,
        cacheKeyGenerator = cacheKeyGenerator,
    )
    .build()

dataAssertNoErrors (#3534)

To reflect more accurately what this method does, dataOrThrow is now dataAssertNoErrors.

Kotlin enums generation by default (#3551)

Apollo Android can either generate GraphQL enums as Kotlin enums or sealed classes. In previous 3.0 releases, the
default was to generate sealed classes but it is now enums, as this will be more expected, works better with Swift, and
is consistent with the 2.x behavior. To fallback to the previous behaviour of always generating sealed classes, use the sealedClassesForEnumsMatching Gradle option:

apollo {
  sealedClassesForEnumsMatching.set(listOf(".*"))
}

Improve java usability (#3576 and #3509)

Using Apollo Android from Java should be less cumbersome thanks to a few API tweaks in this release. For example, to set
up a normalized cache:

// Before
builder = ClientCacheExtensionsKt.normalizedCache(
    builder,
    new MemoryCacheFactory(10 * 1024 * 1024, -1),
    TypePolicyObjectIdGenerator.INSTANCE,
    FieldPolicyCacheResolver.INSTANCE,
    false
    );

// After
    NormalizedCache.configureApolloClientBuilder(
    builder,
    new MemoryCacheFactory(10 * 1024 * 1024, -1),
    );

Other noteworthy tweaks (#3509, #3538, #3557, #3598)

• HttpNetworkTransport and WebSocketNetworkTransport now use the Builder pattern for instantiation
• FlowDecorator have been removed from ApolloClient as ApolloInterceptor can be used instead
• httpHeader extension is now addHttpHeader
• We also made sure with this release that classes that are not meant to be used outside the library are marked as
  internal.

✨ [new] Java Platform Module System (JPMS) support (#3558)

Apollo Android now publishes jar files containing the Automatic-Module-Name property and non-split packages. This
change makes it easier to work with Apollo Android from a Java 9+ modularized application.

✨ [new] Add fallback adapters (#3582)

You no longer need to register any of the built-in adapters after declaring a custom scalar type that maps to a built-in
type (Int, Long, String, etc.).

For instance, when declaring this custom scalar type:

apollo {
  customScalarsMapping = [
      "MyCustomNumber": "kotlin.Long"
  ]
}

There is no need to call addCustomScalarAdapter on the builder anymore, as since it is for a kotlin.Long it will
automatically fall back to the built-in LongAdapter.

🪲 [fixes] Optimistic cache and Gradle plugin (#3577, #3496)

• Fix an issue where the optimistic cache data was not reverted when an error happens
• The Gradle plugin now correctly works without the Kotlin Plugin

👷 All Changes

• make Guard and NonMainWorker internal (#3600)
• Tweak visibility of apollo-api symbols (#3598)
• Make a few classes internal (#3591)
• Make a few classes either internal or @ApolloInternal (#3590)
• Check internal on http-cache (#3589)
• Renames in ApolloCall and ApolloClient (#3594)
• Add apollo-annotations (#3588)
• Add fallback adapters (#3582)
• Merge main in dev-3.x (#3580)
• Improve java usability (#3576)
• Optimistic cache fixes (#3577)
• Add 2.x compat mode for useHttpGetMethodForQueries and useHttpGetMethodForPersistedQueries (#3578)
• Rename ObjectId to CacheKey (#3575)
• Handle experimental opt ins (#3565)
• Kotlin 1.6 (#3563)
• JPMS support (#3558)
• Rename httpHeader extensions to addHttpHeader (#3557)
• Go back to generating GraphQL enums as Kotlin enums by default (#3551)
• Relocate the kotlin-stdlib in the Gradle Plugin (#3542)
• Add "UI testing" and remove flowDecorators (#3538)
• Allow Delete/Continue/Replace during AST transformations (#3545)
• Tweak the errors doc and add ApolloResponse.dataAssertNoErrors (#3534)
• update Gradle and wrapper to 7.3 (#3535)
• Mark Test Builders are experimental (#3511)
• Add more Builders and other API tuning ✨ (#3509)
• Make the Gradle plugin work without the Kotlin Plugin (#3496)

Version 2.5.11 is a maintenance release with fixes for registerApolloOperations and query batching.

💜 Many thanks to @AOrobator and @rocketraman for their awesome contributions and feedback !💜

👷 All Changes

• Added toString method for Input by @AOrobator in https://github.com/apollographql/apollo-android/pull/3427
• Make safelistingHash closer to its apollo-tooling counterpart by @martinbonnin in https://github.com/apollographql/apollo-android/pull/3471
• Make sure Response is always closed when batching by @martinbonnin in https://github.com/apollographql/apollo-android/pull/3541

Full Changelog: https://github.com/apollographql/apollo-android/compare/v2.5.10...v2.5.11