Merge pull request #417: Expose WorkflowIdConflictPolicy

src/Client/Workflow/WorkflowExecutionDescription.php

@@ -15,6 +15,9 @@
  */
 final class WorkflowExecutionDescription
 {
+    /**
+     * @internal
+     */
     public function __construct(
         public readonly WorkflowExecutionInfo $info,
     ) {

src/Client/WorkflowOptions.php

@@ -21,6 +21,7 @@
 use Temporal\Common\MethodRetry;
 use Temporal\Common\RetryOptions;
 use Temporal\Common\Uuid;
+use Temporal\Common\WorkflowIdConflictPolicy;
 use Temporal\DataConverter\DataConverterInterface;
 use Temporal\Internal\Marshaller\Meta\Marshal;
 use Temporal\Internal\Marshaller\Type\ArrayType;
@@ -98,12 +99,19 @@ final class WorkflowOptions extends Options
     public \DateInterval $workflowTaskTimeout;
 
     /**
-     * Whether server allow reuse of workflow ID, can be useful for deduplication logic.
-     * If set to {@see IdReusePolicy::POLICY_REJECT_DUPLICATE}.
+     * Whether server allow reuse of workflow ID.
+     *
+     * Can be useful for deduplication logic if set to {@see IdReusePolicy::POLICY_REJECT_DUPLICATE}.
      */
     #[Marshal(name: 'WorkflowIDReusePolicy')]
     public int $workflowIdReusePolicy = IdReusePolicy::POLICY_ALLOW_DUPLICATE_FAILED_ONLY;
 
+    /**
+     * Defines how to resolve an ID conflict with a *running* workflow.
+     */
+    #[Marshal(name: 'WorkflowIdConflictPolicy')]
+    public WorkflowIdConflictPolicy $workflowIdConflictPolicy = WorkflowIdConflictPolicy::Unspecified;
+
     /**
      * Optional retry policy for workflow. If a retry policy is specified, in
      * case of workflow failure server will start new workflow execution if
@@ -319,8 +327,8 @@ public function withWorkflowStartDelay($delay): self
     }
 
     /**
-     * Specifies server behavior if a completed workflow with the same id
-     * exists. Note that under no conditions Temporal allows two workflows
+     * Specifies server behavior if a *closed* workflow with the same id exists.
+     * Note that under no conditions Temporal allows two workflows
      * with the same namespace and workflow id run simultaneously.
      *
      * - {@see IdReusePolicy::AllowDuplicateFailedOnly}: Is a default
@@ -347,6 +355,21 @@ public function withWorkflowIdReusePolicy(IdReusePolicy|int $policy): self
         return $self;
     }
 
+    /**
+     * Defines how to resolve an ID conflict with a *running* workflow.
+     *
+     * @psalm-suppress ImpureMethodCall
+     *
+     * @return $this
+     */
+    #[Pure]
+    public function withWorkflowIdConflictPolicy(WorkflowIdConflictPolicy $policy): self
+    {
+        $self = clone $this;
+        $self->workflowIdConflictPolicy = $policy;
+        return $self;
+    }
+
     /**
      * RetryOptions that define how child workflow is retried in case of
      * failure. Default is null which is no reties.

src/Common/WorkflowIdConflictPolicy.php

@@ -0,0 +1,40 @@
+<?php
+
+/**
+ * This file is part of Temporal package.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Temporal\Common;
+
+/**
+ * Defines what to do when trying to start a workflow with the same workflow id as a *running* workflow.
+ * Note that it is *never* valid to have two actively running instances of the same workflow id.
+ *
+ * @see IdReusePolicy for handling workflow id duplication with a *closed* workflow.
+ * @see \Temporal\Api\Enums\V1\WorkflowIdConflictPolicy
+ */
+enum WorkflowIdConflictPolicy: int
+{
+    case Unspecified = 0;
+
+    /**
+     * Don't start a new workflow; instead return `WorkflowExecutionAlreadyStartedFailure`.
+     */
+    case Fail = 1;
+
+    /**
+     * Don't start a new workflow; instead return a workflow handle for the running workflow.
+     */
+    case UseExisting = 2;
+
+    /**
+     * Terminate the running workflow before starting a new one.
+     */
+    case TerminateExisting = 3;
+
+}

src/Internal/Client/WorkflowStarter.php

@@ -194,6 +194,7 @@ private function configureExecutionRequest(
             ->setCronSchedule($options->cronSchedule ?? '')
             ->setRetryPolicy($options->retryOptions ? $options->retryOptions->toWorkflowRetryPolicy() : null)
             ->setWorkflowIdReusePolicy($options->workflowIdReusePolicy)
+            ->setWorkflowIdConflictPolicy($options->workflowIdConflictPolicy->value)
             ->setWorkflowRunTimeout(DateInterval::toDuration($options->workflowRunTimeout))
             ->setWorkflowExecutionTimeout(DateInterval::toDuration($options->workflowExecutionTimeout))
             ->setWorkflowTaskTimeout(DateInterval::toDuration($options->workflowTaskTimeout))

tests/Unit/DTO/WorkflowOptionsTestCase.php

@@ -18,6 +18,7 @@
 use Temporal\Common\IdReusePolicy;
 use Temporal\Common\RetryOptions;
 use Temporal\Common\Uuid;
+use Temporal\Common\WorkflowIdConflictPolicy;
 use Temporal\DataConverter\DataConverter;
 
 class WorkflowOptionsTestCase extends AbstractDTOMarshalling
@@ -38,6 +39,10 @@ public function testMarshalling(): void
             'WorkflowStartDelay'       => 0,
             'WorkflowTaskTimeout'      => 0,
             'WorkflowIDReusePolicy'    => 2,
+            'WorkflowIdConflictPolicy' => [
+                'name' => 'Unspecified',
+                'value' => 0,
+            ],
             'RetryPolicy'              => null,
             'CronSchedule'             => null,
             'Memo'                     => null,
@@ -125,6 +130,17 @@ public function testWorkflowIdReusePolicyChangesNotMutateStateUsingEnum(): void
         $this->assertSame(IdReusePolicy::AllowDuplicateFailedOnly->value, $dto->workflowIdReusePolicy);
     }
 
+    public function testWorkflowIdConflictPolicy(): void
+    {
+        $dto = new WorkflowOptions();
+
+        $this->assertNotSame($dto, $newDto = $dto->withWorkflowIdConflictPolicy(
+            WorkflowIdConflictPolicy::Fail
+        ));
+        $this->assertSame(WorkflowIdConflictPolicy::Unspecified, $dto->workflowIdConflictPolicy);
+        $this->assertSame(WorkflowIdConflictPolicy::Fail, $newDto->workflowIdConflictPolicy);
+    }
+
     public function testRetryOptionsChangesNotMutateState(): void
     {
         $dto = new WorkflowOptions();