v3.0.0-rc02

💙 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)