Projectionist::addEventHandler() - Code Metrics - Inspection of "wip" - spatie/laravel-event-sourcing - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 00f04e...1d93d6 )

by Freek

created 2019-12-02 19:56 UTC

Projectionist::addEventHandler() A

↳ Parent: Project

Complexity

Conditions	5
Paths	8

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	26
rs	9.1928
c	0
b	0
f	0
cc	5
nc	8
nop	1

<?php

namespace Spatie\EventSourcing;

use Exception;
use Illuminate\Support\Arr;
use Illuminate\Support\Collection;
use Spatie\EventSourcing\EventHandlers\EventHandler;
use Spatie\EventSourcing\EventHandlers\EventHandlerCollection;
use Spatie\EventSourcing\Events\EventHandlerFailedHandlingEvent;
use Spatie\EventSourcing\Events\FinishedEventReplay;
use Spatie\EventSourcing\Events\StartingEventReplay;
use Spatie\EventSourcing\Exceptions\InvalidEventHandler;
use Spatie\EventSourcing\Projectors\Projector;
use Spatie\EventSourcing\Projectors\QueuedProjector;

final class Projectionist
{
    private EventHandlerCollection $projectors;


    private EventHandlerCollection $reactors;

    private bool $catchExceptions;

    private bool $replayChunkSize;

    private bool $isProjecting = false;

    private bool $isReplaying = false;

    public function __construct(array $config)
    {
        $this->projectors = new EventHandlerCollection();
        $this->reactors = new EventHandlerCollection();

        $this->catchExceptions = $config['catch_exceptions'];
        $this->replayChunkSize = $config['replay_chunk_size'];
    }

    public function addProjector($projector): Projectionist
    {
        if (is_string($projector)) {
            $projector = app($projector);
        }

        if (! $projector instanceof Projector) {
            throw InvalidEventHandler::notAProjector($projector);
        }

        $this->projectors->add($projector);

        return $this;
    }

    public function withoutEventHandlers(array $eventHandlers = null): Projectionist
    {
        if (is_null($eventHandlers)) {
            $this->projectors = new EventHandlerCollection();
            $this->reactors = new EventHandlerCollection();

            return $this;
        }

        $eventHandlers = Arr::wrap($eventHandlers);

        $this->projectors->remove($eventHandlers);

        $this->reactors->remove($eventHandlers);

        return $this;
    }

    public function withoutEventHandler(string $eventHandler): Projectionist
    {
        return $this->withoutEventHandlers([$eventHandler]);
    }

    public function addProjectors(array $projectors): Projectionist
    {
        foreach ($projectors as $projector) {
            $this->addProjector($projector);
        }

        return $this;
    }

    public function getProjectors(): Collection
    {
        return $this->projectors->all();
    }

    public function getProjector(string $name): ?Projector
    {
        return $this->projectors->all()->first(fn(Projector $projector) => $projector->getName() === $name);
    }

    public function addReactor($reactor): Projectionist
    {
        if (is_string($reactor)) {
            $reactor = app($reactor);
        }

        if (! $reactor instanceof EventHandler) {
            throw InvalidEventHandler::notAnEventHandler($reactor);
        }

        $this->reactors->add($reactor);

        return $this;
    }

    public function addReactors(array $reactors): Projectionist
    {
        foreach ($reactors as $reactor) {
            $this->addReactor($reactor);
        }

        return $this;
    }

    public function getReactors(): Collection
    {
        return $this->reactors->all();
    }

    public function addEventHandler($eventHandlerClass)
    {
        if (! is_string($eventHandlerClass)) {
            $eventHandlerClass = get_class($eventHandlerClass);
        }

        if (is_subclass_of($eventHandlerClass, Projector::class)) {
            $this->addProjector($eventHandlerClass);

            return;
        }

        if (is_subclass_of($eventHandlerClass, QueuedProjector::class)) {
            $this->addProjector($eventHandlerClass);

            return;
        }

        if (is_subclass_of($eventHandlerClass, EventHandler::class)) {
            $this->addReactor($eventHandlerClass);

            return;
        }

        throw InvalidEventHandler::notAnEventHandlingClassName($eventHandlerClass);
    }

    public function addEventHandlers(array $eventHandlers)
    {
        foreach ($eventHandlers as $eventHandler) {
            $this->addEventHandler($eventHandler);
        }
    }

    public function handle(StoredEvent $storedEvent): void
    {
        $projectors = $this->projectors
            ->forEvent($storedEvent)
            ->reject(fn(Projector $projector) => $projector->shouldBeCalledImmediately());

        $this->applyStoredEventToProjectors(
            $storedEvent,
            $projectors
        );

        $this->applyStoredEventToReactors(
            $storedEvent,
            $this->reactors->forEvent($storedEvent)
        );
    }

    public function handleWithSyncProjectors(StoredEvent $storedEvent): void
    {
        $projectors = $this->projectors
            ->forEvent($storedEvent)
            ->filter(fn(Projector $projector) => $projector->shouldBeCalledImmediately());

        $this->applyStoredEventToProjectors($storedEvent, $projectors);
    }

    public function isProjecting(): bool
    {
        return $this->isProjecting;
    }

    private function applyStoredEventToProjectors(StoredEvent $storedEvent, Collection $projectors): void
    {
        $this->isProjecting = true;

        foreach ($projectors as $projector) {
            $this->callEventHandler($projector, $storedEvent);
        }

        $this->isProjecting = false;
    }

    private function applyStoredEventToReactors(StoredEvent $storedEvent, Collection $reactors): void
    {
        foreach ($reactors as $reactor) {
            $this->callEventHandler($reactor, $storedEvent);
        }
    }

    private function callEventHandler(EventHandler $eventHandler, StoredEvent $storedEvent): bool
    {
        try {
            $eventHandler->handle($storedEvent);
        } catch (Exception $exception) {
            if (! $this->catchExceptions) {
                throw $exception;
            }

            $eventHandler->handleException($exception);

            event(new EventHandlerFailedHandlingEvent($eventHandler, $storedEvent, $exception));

            return false;
        }

        return true;
    }

    public function isReplaying(): bool
    {
        return $this->isReplaying;
    }

    public function replay(
        Collection $projectors,
        int $startingFromEventId = 0,
        callable $onEventReplayed = null
    ): void {
        $projectors = new EventHandlerCollection($projectors);

        $this->isReplaying = true;

        if ($startingFromEventId === 0) {
            $projectors->all()->each(function (Projector $projector) {
                if (method_exists($projector, 'resetState')) {
                    $projector->resetState();
                }
            });
        }

        event(new StartingEventReplay($projectors->all()));

        $projectors->call('onStartingEventReplay');

        app(StoredEventRepository::class)->retrieveAllStartingFrom($startingFromEventId)->each(function (StoredEvent $storedEvent) use ($projectors, $onEventReplayed) {
            $this->applyStoredEventToProjectors(
                $storedEvent,
                $projectors->forEvent($storedEvent)
            );

            if ($onEventReplayed) {
                $onEventReplayed($storedEvent);
            }
        });

        $this->isReplaying = false;

        event(new FinishedEventReplay());

        $projectors->call('onFinishedEventReplay');
    }
}


1			<?php
2
3			namespace Spatie\EventSourcing;
4
5			use Exception;
6			use Illuminate\Support\Arr;
7			use Illuminate\Support\Collection;
8			use Spatie\EventSourcing\EventHandlers\EventHandler;
9			use Spatie\EventSourcing\EventHandlers\EventHandlerCollection;
10			use Spatie\EventSourcing\Events\EventHandlerFailedHandlingEvent;
11			use Spatie\EventSourcing\Events\FinishedEventReplay;
12			use Spatie\EventSourcing\Events\StartingEventReplay;
13			use Spatie\EventSourcing\Exceptions\InvalidEventHandler;
14			use Spatie\EventSourcing\Projectors\Projector;
15			use Spatie\EventSourcing\Projectors\QueuedProjector;
16
17			final class Projectionist
18			{
19			private EventHandlerCollection $projectors;
			0 ignored issues – show Bug introduced 2019-12-02 20:00 UTC by Report Bug Copy Issue Report This code did not parse for me. Apparently, there is an error somewhere around this line: Syntax error, unexpected T_STRING, expecting T_FUNCTION or T_CONST Loading history...
20
21			private EventHandlerCollection $reactors;
22
23			private bool $catchExceptions;
24
25			private bool $replayChunkSize;
26
27			private bool $isProjecting = false;
28
29			private bool $isReplaying = false;
30
31			public function __construct(array $config)
32			{
33			$this->projectors = new EventHandlerCollection();
34			$this->reactors = new EventHandlerCollection();
35
36			$this->catchExceptions = $config['catch_exceptions'];
37			$this->replayChunkSize = $config['replay_chunk_size'];
38			}
39
40			public function addProjector($projector): Projectionist
41			{
42			if (is_string($projector)) {
43			$projector = app($projector);
44			}
45
46			if (! $projector instanceof Projector) {
47			throw InvalidEventHandler::notAProjector($projector);
48			}
49
50			$this->projectors->add($projector);
51
52			return $this;
53			}
54
55			public function withoutEventHandlers(array $eventHandlers = null): Projectionist
56			{
57			if (is_null($eventHandlers)) {
58			$this->projectors = new EventHandlerCollection();
59			$this->reactors = new EventHandlerCollection();
60
61			return $this;
62			}
63
64			$eventHandlers = Arr::wrap($eventHandlers);
65
66			$this->projectors->remove($eventHandlers);
67
68			$this->reactors->remove($eventHandlers);
69
70			return $this;
71			}
72
73			public function withoutEventHandler(string $eventHandler): Projectionist
74			{
75			return $this->withoutEventHandlers([$eventHandler]);
76			}
77
78			public function addProjectors(array $projectors): Projectionist
79			{
80			foreach ($projectors as $projector) {
81			$this->addProjector($projector);
82			}
83
84			return $this;
85			}
86
87			public function getProjectors(): Collection
88			{
89			return $this->projectors->all();
90			}
91
92			public function getProjector(string $name): ?Projector
93			{
94			return $this->projectors->all()->first(fn(Projector $projector) => $projector->getName() === $name);
95			}
96
97			public function addReactor($reactor): Projectionist
98			{
99			if (is_string($reactor)) {
100			$reactor = app($reactor);
101			}
102
103			if (! $reactor instanceof EventHandler) {
104			throw InvalidEventHandler::notAnEventHandler($reactor);
105			}
106
107			$this->reactors->add($reactor);
108
109			return $this;
110			}
111
112			public function addReactors(array $reactors): Projectionist
113			{
114			foreach ($reactors as $reactor) {
115			$this->addReactor($reactor);
116			}
117
118			return $this;
119			}
120
121			public function getReactors(): Collection
122			{
123			return $this->reactors->all();
124			}
125
126			public function addEventHandler($eventHandlerClass)
127			{
128			if (! is_string($eventHandlerClass)) {
129			$eventHandlerClass = get_class($eventHandlerClass);
130			}
131
132			if (is_subclass_of($eventHandlerClass, Projector::class)) {
133			$this->addProjector($eventHandlerClass);
134
135			return;
136			}
137
138			if (is_subclass_of($eventHandlerClass, QueuedProjector::class)) {
139			$this->addProjector($eventHandlerClass);
140
141			return;
142			}
143
144			if (is_subclass_of($eventHandlerClass, EventHandler::class)) {
145			$this->addReactor($eventHandlerClass);
146
147			return;
148			}
149
150			throw InvalidEventHandler::notAnEventHandlingClassName($eventHandlerClass);
151			}
152
153			public function addEventHandlers(array $eventHandlers)
154			{
155			foreach ($eventHandlers as $eventHandler) {
156			$this->addEventHandler($eventHandler);
157			}
158			}
159
160			public function handle(StoredEvent $storedEvent): void
161			{
162			$projectors = $this->projectors
163			->forEvent($storedEvent)
164			->reject(fn(Projector $projector) => $projector->shouldBeCalledImmediately());
165
166			$this->applyStoredEventToProjectors(
167			$storedEvent,
168			$projectors
169			);
170
171			$this->applyStoredEventToReactors(
172			$storedEvent,
173			$this->reactors->forEvent($storedEvent)
174			);
175			}
176
177			public function handleWithSyncProjectors(StoredEvent $storedEvent): void
178			{
179			$projectors = $this->projectors
180			->forEvent($storedEvent)
181			->filter(fn(Projector $projector) => $projector->shouldBeCalledImmediately());
182
183			$this->applyStoredEventToProjectors($storedEvent, $projectors);
184			}
185
186			public function isProjecting(): bool
187			{
188			return $this->isProjecting;
189			}
190
191			private function applyStoredEventToProjectors(StoredEvent $storedEvent, Collection $projectors): void
192			{
193			$this->isProjecting = true;
194
195			foreach ($projectors as $projector) {
196			$this->callEventHandler($projector, $storedEvent);
197			}
198
199			$this->isProjecting = false;
200			}
201
202			private function applyStoredEventToReactors(StoredEvent $storedEvent, Collection $reactors): void
203			{
204			foreach ($reactors as $reactor) {
205			$this->callEventHandler($reactor, $storedEvent);
206			}
207			}
208
209			private function callEventHandler(EventHandler $eventHandler, StoredEvent $storedEvent): bool
210			{
211			try {
212			$eventHandler->handle($storedEvent);
213			} catch (Exception $exception) {
214			if (! $this->catchExceptions) {
215			throw $exception;
216			}
217
218			$eventHandler->handleException($exception);
219
220			event(new EventHandlerFailedHandlingEvent($eventHandler, $storedEvent, $exception));
221
222			return false;
223			}
224
225			return true;
226			}
227
228			public function isReplaying(): bool
229			{
230			return $this->isReplaying;
231			}
232
233			public function replay(
234			Collection $projectors,
235			int $startingFromEventId = 0,
236			callable $onEventReplayed = null
237			): void {
238			$projectors = new EventHandlerCollection($projectors);
239
240			$this->isReplaying = true;
241
242			if ($startingFromEventId === 0) {
243			$projectors->all()->each(function (Projector $projector) {
244			if (method_exists($projector, 'resetState')) {
245			$projector->resetState();
246			}
247			});
248			}
249
250			event(new StartingEventReplay($projectors->all()));
251
252			$projectors->call('onStartingEventReplay');
253
254			app(StoredEventRepository::class)->retrieveAllStartingFrom($startingFromEventId)->each(function (StoredEvent $storedEvent) use ($projectors, $onEventReplayed) {
255			$this->applyStoredEventToProjectors(
256			$storedEvent,
257			$projectors->forEvent($storedEvent)
258			);
259
260			if ($onEventReplayed) {
261			$onEventReplayed($storedEvent);
262			}
263			});
264
265			$this->isReplaying = false;
266
267			event(new FinishedEventReplay());
268
269			$projectors->call('onFinishedEventReplay');
270			}
271			}
272

spatie / laravel-event-sourcing

Push — master ( 00f04e...1d93d6 )

Projectionist::addEventHandler() A

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