Laravel temporal.io

This package allow an easy integration of a Laravel app with a temporal.io, which is a distributed, scalable, durable, and highly available orchestration engine for asynchronous long-running business logic in a microservice architecture.

This package provides:

Commands to create a new workflow and activity
Command to start the worker which will execute workflows and activities from the provided task queue
Testing helpers that allows mock of workflows and activities executions

Installation

You can install the package via composer:

composer require keepsuit/laravel-temporal

Then download the latest roadrunner executable for your platform:

./vendor/bin/rr get-binary

Note

You should run this command after every update to ensure that you have the latest version of roadrunner executable.

You can publish the config file with:

php artisan vendor:publish --tag="temporal-config"

This is the contents of the published config file:

<?php

return [
    /**
     * Temporal server address
     */
    'address' => env('TEMPORAL_ADDRESS', 'localhost:7233'),

    /**
     * Temporal namespace
     */
    'namespace' => env('TEMPORAL_NAMESPACE', \Temporal\Client\ClientOptions::DEFAULT_NAMESPACE),

    /**
     * Default task queue
     */
    'queue' => \Temporal\WorkerFactory::DEFAULT_TASK_QUEUE,

    /**
     * Default retry policy
     */
    'retry' => [

        /**
         * Default retry policy for workflows
         */
        'workflow' => [
            /**
             * Initial retry interval (in seconds)
             * Default: 1
             */
            'initial_interval' => null,

            /**
             * Retry interval increment
             * Default: 2.0
             */
            'backoff_coefficient' => null,

            /**
             * Maximum interval before fail
             * Default: 100 x initial_interval
             */
            'maximum_interval' => null,

            /**
             * Maximum attempts
             * Default: unlimited
             */
            'maximum_attempts' => null,
        ],

        /**
         * Default retry policy for activities
         */
        'activity' => [
            /**
             * Initial retry interval (in seconds)
             * Default: 1
             */
            'initial_interval' => null,

            /**
             * Retry interval increment
             * Default: 2.0
             */
            'backoff_coefficient' => null,

            /**
             * Maximum interval before fail
             * Default: 100 x initial_interval
             */
            'maximum_interval' => null,

            /**
             * Maximum attempts
             * Default: unlimited
             */
            'maximum_attempts' => null,
        ],
    ],

    /**
     * Manual register workflows
     */
    'workflows' => [
    ],

    /**
     * Manual register activities
     */
    'activities' => [
    ],

    /**
     * Directories to watch when server is started with `--watch` flag
     */
    'watch' => [
        'app',
        'config',
    ],

    /**
     * Integrations options
     */
    'integrations' => [

        /**
         * Eloquent models serialization/deserialization options
         */
        'eloquent' => [
            /**
             * Default attribute key case conversion when serialize a model before sending to temporal.
             * Supported values: 'snake', 'camel', null.
             */
            'serialize_attribute_case' => null,

            /**
             * Default attribute key case conversion when deserializing payload received from temporal.
             * Supported values: 'snake', 'camel', null.
             */
            'deserialize_attribute_case' => null,

            /*
             * If true adds a `__exists` attribute to the serialized model
             * which indicate that the model is saved to database and it is used on deserialization when creating the model.
             * If false (or `__exists` is not present) the model will be created as existing model if primary key is present.
             */
            'include_exists_field' => false,
        ],
    ],
];

Usage

Here we will see the utilities provided by this package. For more information about Temporal and Workflow/Activity options please refer to the official documentation.

Create workflows and activities

To create a new workflow, you can use the make:workflow {name} command, which will create a new workflow interface & relative class in the app/Temporal/Workflows directory.

To create a new activity, you can use the make:activity {name} command, which will create a new activity interface & relative class in the app/Temporal/Activities directory.

Note

If you already have workflow/activities in app/Workflows and app/Activities directories, the make commands will create the new workflow/activity in the these directories.

Workflows in app/Temporal/Workflows and app/Workflows and activities in app/Temporal/Activities, app/Activities, app/Temporal/Workflows and app/Workflows are automatically registered. If you put your workflows and activities in other directories, you can register them manually in the workflows and activities config keys.

Build and start a workflow

To start a workflow, you must build a stub through the Temporal Facade.

$workflow = Temporal::newWorkflow()
    ->withTaskQueue('custom-task-queue') // Workflow options can be provided with fluent methods
    ->build(YourWorkflowInterface::class);

// This will start a new workflow execution and wait for the result
$result = $workflow->yourMethod();

// This will start a new workflow execution and return immediately
app(\Temporal\Client\WorkflowClientInterface::class)->start($workflow);

Build and start an activity

To start an activity, you must build a stub through the Temporal Facade (note that activities must be built inside a workflow). Activity methods returns a Generator, so you must use the yield keyword to wait for the result.

$activity = Temporal::newActivity()
    ->withTaskQueue('custom-task-queue') // Activity options can be provided with fluent methods
    ->build(YourActivityInterface::class);

$result = yield $activity->yourActivityMethod();

Build and start a child workflow

Child workflows works like activity and like activities must be built inside a workflow.

$childWorkflow = Temporal::newChildWorkflow()
    ->build(YourChildWorkflowInterface::class);

$result = yield $childWorkflow->yourActivityMethod();

Input and output payloads

Payloads provided to workflows/activities as params and returned from them must be serialized, sent to the Temporal server and deserialized by the worker. Activities can be executed by workers written in different languages, so the payload must be serialized in a common format. Out of the box temporal sdk supports native php types and protobuf messages. This package adds some laravel specific options for serialization/deserialization of objects:

TemporalSerializable interface can be implemented to add support for custom serialization/deserialization.
Eloquent models can be correctly serialized/deserialized (with relations) adding TemporalSerializable interface and TemporalEloquentSerialize trait.
spatie/laravel-data data objects are supported out of the box.

To improve laravel-data support, this package provides TemporalSerializableCast and TemporalSerializableTransformer to add support for serialization/deserialization of TemporalSerializable objects used as Data properties. You can add them to data.casts and data.transformers config to add support globally.

Run the temporal worker

To run the temporal worker, you can use the temporal:work {queue?} command.

Testing utilities

In order to test workflows end-to-end, you need a temporal server running. This package provides two options to run a temporal server for testing purposes:

Run temporal:server command, which will start a temporal testing server and use the WithTemporalWorker trait which will start a test worker
Use the WithTemporal trait, which will start a temporal testing server and the test worker when running test and stop it on finish

When using WithTemporal trait, you can set TEMPORAL_TESTING_SERVER env variable to false to disable the testing server and run only the worker.

Mocking workflows

Mocking a workflow can be useful when the workflow should be executed in another service or simply when you want to test other parts of your code without running the workflow. This works for child workflows too.

Temporal::fake();

$workflowMock = Temporal::mockWorkflow(YourWorkflowInterface::class)
    ->onTaskQueue('custom-queue'); // not required but useful for mocking and asserting that workflow is executed on the correct queue
    ->andReturn('result');

// Your test code...

$workflowMock->assertDispatched();
$workflowMock->assertDispatchedTimes(1);
$workflowMock->assertNotDispatched();

// All assertion method support a callback to assert the workflow input
$workflowMock->assertDispatched(function ($input) {
    return $input['foo'] === 'bar';
});

Mocking activities

Mocking activities works like workflows, but for activity you must provide interface and the method to mock.

Temporal::fake();

$activityMock = Temporal::mockActivity([YourActivityInterface::class, 'activityMethod'])
    ->onTaskQueue('custom-queue'); // not required but useful for mocking and asserting that activity is executed on the correct queue
    ->andReturn('result');

// Your test code...

$activityMock->assertDispatched();
$activityMock->assertDispatchedTimes(1);
$activityMock->assertNotDispatched();

// All assertion method support a callback to assert the activity input
$activityMock->assertDispatched(function ($input) {
    return $input['foo'] === 'bar';
});

Assertions

Dispatches assertions can be done through the Temporal facade but there are some downsides compared to the options above:

You must provide the workflow/activity interface and method name, so this is duplicated
If you want to ensure that the workflow/activity is executed on the correct queue, you must check the task queue yourself

Temporal::assertWorkflowDispatched(YourWorkflowInterface::class, function($workflowInput, string $taskQueue) {
    return $workflowInput['foo'] === 'bar' && $taskQueue === 'custom-queue';
});

Temporal::assertActivityDispatched([YourActivityInterface::class, 'activityMethod'], function($activityInput, string $taskQueue) {
    return $activityInput['foo'] === 'bar' && $taskQueue === 'custom-queue';
});

PHPStan

This package provides a PHPStan extension to improve the experience when working with Temporal proxy classes.

If you have phpstan/extension-installer installed, you are ready to go. Otherwise, you have to add the extension to your phpstan.neon file:

includes:
    - ./vendor/keepsuit/laravel-temporal/extension.neon

Testing

composer test

danatriz / laravel-temporal Goto Github PK

laravel-temporal's Introduction

Laravel temporal.io

Installation

Usage

Create workflows and activities

Build and start a workflow

Build and start an activity

Build and start a child workflow

Input and output payloads

Run the temporal worker

Testing utilities

Mocking workflows

Mocking activities

Assertions

PHPStan

Testing

Changelog

Credits

License

laravel-temporal's People

Contributors

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