Implement operator commands for Standalone Activities

CHANGELOG.md

@@ -0,0 +1,51 @@
+<!--
+High-level release notes.
+Loosely based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
+
+When your PR includes a user-facing change, add an entry below under the
+appropriate heading (create the heading if it does not yet exist). Within
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+
+### Added            — new features
+### Changed          — changes in existing functionality
+### Deprecated       — soon-to-be-removed features
+### :boom: Breaking Changes — removed or backwards-incompatible features
+### Fixed            — notable bug fixes
+### Security         — notable security fixes
+-->
+
+# Changelog
+
+## [Unreleased]
+
+### Added
+
+#### Standalone Activity operator commands
+
+- `UntypedActivityHandle` and `ActivityHandle` now support operator commands for standalone
+   activities: `pause()`, `unpause()`, `reset()`, `updateOptions()` and `restoreOriginalOptions()`.
+  `updateOptions()` takes `ActivityOptionsUpdate` values built from the keys on
+  `ActivityOptionsKeys`, via `ActivityOptionsKey.valueSet()` to set an option or
+  `ActivityOptionsKey.valueUnset()` to clear it, and returns the server's resolved
+  `ActivityExecutionOptions`.
+- Added opt-in payload flags to `DescribeActivityOptions`: `setIncludeInput()`,
+  `setIncludeOutcome()`, `setIncludeHeartbeatDetails()` and `setIncludeLastFailure()`, all
+  defaulting to `false`.
+- Added missing `ActivityExecutionDescription` fields: `getExecutionTime()`, `getStartDelay()`
+  and `getTotalHeartbeatCount()`.
+
+### :boom: Breaking Changes
+
+- `ActivityExecutionDescription` payload fields are now opt-in and must be requested via
+  `DescribeActivityOptions`: `getInput()`, `getResult()`, `getHeartbeatDetails()` and
+  `getLastFailure()`. Each has a matching `hasInput()` / `hasResult()` /
+  `hasHeartbeatDetails()` / `hasLastFailure()` predicate.
+
+### Changed
+
+### Deprecated
+
+### Fixed
+
+### Security

contrib/temporal-opentracing/src/test/java/io/temporal/opentracing/StandaloneActivityClientTracingTest.java

@@ -7,6 +7,7 @@
 import io.opentracing.util.ThreadLocalScopeManager;
 import io.temporal.api.workflowservice.v1.CountActivityExecutionsResponse;
 import io.temporal.client.ActivityExecutionCount;
+import io.temporal.client.DescribeActivityOptions;
 import io.temporal.client.StartActivityOptions;
 import io.temporal.common.interceptors.ActivityClientCallsInterceptor;
 import io.temporal.common.interceptors.ActivityClientCallsInterceptorBase;
@@ -108,7 +109,8 @@ public void testManagementCallsDoNotCreateSpans() throws TimeoutException {
         new ActivityClientCallsInterceptor.GetActivityResultInput<>(
             "act-result-async", null, String.class));
     interceptor.describeActivity(
-        new ActivityClientCallsInterceptor.DescribeActivityInput("act-desc", null));
+        new ActivityClientCallsInterceptor.DescribeActivityInput(
+            "act-desc", null, DescribeActivityOptions.getDefaultInstance()));
     interceptor.cancelActivity(
         new ActivityClientCallsInterceptor.CancelActivityInput("act-cancel", null, "reason"));
     interceptor.terminateActivity(