ContinueAsNew does not support specifying a new orchestration version

Summary

The continueAsNew() API does not expose a way to specify a new orchestration version for the restarted instance. The underlying protobuf field (CompleteOrchestrationAction.newVersion, field 4) has existed since the initial proto commit, but the Java SDK never populates it.

Problem

TaskOrchestrationContext.continueAsNew() only accepts (Object input, boolean preserveUnprocessedEvents). There is no parameter to pass a new version. In TaskOrchestrationExecutor, when building the CompleteOrchestrationAction, setNewVersion() is never called — the field is always left empty.

This prevents version migration scenarios for long-running/eternal orchestrations (e.g., monitoring loops that need to evolve their logic over time via continueAsNew with a new version).

What exists today

• Proto layer: CompleteOrchestrationAction.newVersion (field 4) is defined and supported by all backends (DurableTask.Core since 2014, DTS/Beskar, gRPC sidecar)
• Java API: continueAsNew(Object input) and continueAsNew(Object input, boolean preserveUnprocessedEvents) — no version parameter
• Java executor: CompleteOrchestrationAction.Builder never calls setNewVersion()

Proposed fix

Follow the pattern from the .NET SDK (microsoft/durabletask-dotnet#682):

1. Add a ContinueAsNewOptions class with newInput, preserveUnprocessedEvents, and newVersion properties
2. Add a continueAsNew(ContinueAsNewOptions options) overload to TaskOrchestrationContext
3. In TaskOrchestrationExecutor, when newVersion is non-null, call builder.setNewVersion(StringValue.of(newVersion)) on the CompleteOrchestrationAction

Related

• .NET SDK implementation: microsoft/durabletask-dotnet#682
• Azure Functions extension: Azure/azure-functions-durable-extension#3404
• Proto field: CompleteOrchestrationAction.newVersion (field 4) in orchestrator_service.proto

Beginne damit, TaskOrchestrationContext und TaskOrchestrationExecutor zu finden, und untersuche anschließend die vorhandenen continueAsNew-Überladungen sowie die Erstellung von CompleteOrchestrationAction. Verwende das in der Beschreibung verlinkte .NET SDK issue als Referenz für die vorgeschlagene Form der Optionen. Die Aufgabe ist abgeschlossen, wenn Java-Aufrufer eine neue Version angeben können und der Executor CompleteOrchestrationAction.newVersion setzt, während das aktuelle Verhalten erhalten bleibt.