Legacy::getDatabaseHandler() - Code Metrics - Inspection of "EZP-25721: [6.7] Improve Config resolver warning t..." - ezsystems/ezpublish-kernel - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — EZP-25721_improve_warning ( d7a071...6ed08c )

by André

created 2019-06-04 18:46 UTC

Legacy::getDatabaseHandler() A

↳ Parent: Legacy

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	1
nc	1
nop	0
dl	0
loc	4
rs	10
c	0
b	0
f	0

<?php

/**
 * File containing the Test Setup Factory base class.
 *
 * @copyright Copyright (C) eZ Systems AS. All rights reserved.
 * @license For full copyright and license information view LICENSE file distributed with this source code.
 */
namespace eZ\Publish\API\Repository\Tests\SetupFactory;

use eZ\Publish\Core\Base\ServiceContainer;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use eZ\Publish\API\Repository\Tests\SetupFactory;
use eZ\Publish\API\Repository\Tests\IdManager;
use eZ\Publish\Core\Persistence\Legacy\Content\Type\MemoryCachingHandler as CachingContentTypeHandler;
use eZ\Publish\Core\Persistence\Legacy\Content\Language\CachingHandler as CachingLanguageHandler;
use Exception;
use eZ\Publish\Core\Repository\Values\User\UserReference;
use Symfony\Component\Filesystem\Filesystem;
use eZ\Publish\Core\Base\Container\Compiler;

/**
 * A Test Factory is used to setup the infrastructure for a tests, based on a
 * specific repository implementation to test.
 */
class Legacy extends SetupFactory
{
    /**
     * Data source name.
     *
     * @var string
     */
    protected static $dsn;

    /**
     * Root dir for IO operations.
     *
     * @var string
     */
    protected static $ioRootDir;

    /**
     * Database type (sqlite, mysql, ...).
     *
     * @var string
     */
    protected static $db;

    /**
     * Service container.
     *
     * @var \eZ\Publish\Core\Base\ServiceContainer
     */
    protected static $serviceContainer;

    /**
     * If the DB schema has already been initialized.
     *
     * @var bool
     */
    protected static $schemaInitialized = false;

    /**
     * Initial database data.
     *
     * @var array
     */
    protected static $initialData;

    protected $repositoryReference = 'ezpublish.api.repository';

    /**
     * Creates a new setup factory.
     */
    public function __construct()
    {
        self::$dsn = getenv('DATABASE');
        if (!self::$dsn) {
            self::$dsn = 'sqlite://:memory:';
        }

        self::$db = preg_replace('(^([a-z]+).*)', '\\1', self::$dsn);

        if (!isset(self::$ioRootDir)) {
            self::$ioRootDir = $this->createTemporaryDirectory();
        }
    }

    /**
     * Creates a temporary directory and returns it.
     *
     * @return string
     * @throw \RuntimeException If the root directory can't be created
     */
    private function createTemporaryDirectory()
    {
        $tmpFile = tempnam(
            sys_get_temp_dir(),
            'ez_legacy_tests_' . time()
        );
        unlink($tmpFile);

        $fs = new Filesystem();
        $fs->mkdir($tmpFile);

        $varDir = $tmpFile . '/var';
        if ($fs->exists($varDir)) {
            $fs->remove($varDir);
        }
        $fs->mkdir($varDir);

        return $tmpFile;
    }

    /**
     * Returns a configured repository for testing.
     *
     * @param bool $initializeFromScratch if the back end should be initialized
     *                                    from scratch or re-used
     *
     * @return \eZ\Publish\API\Repository\Repository
     */
    public function getRepository($initializeFromScratch = true)
    {
        if ($initializeFromScratch || !self::$schemaInitialized) {
            $this->initializeSchema();
            $this->insertData();
        }

        $this->clearInternalCaches();
        $repository = $this->getServiceContainer()->get($this->repositoryReference);

        // Set admin user as current user by default
        $repository->setCurrentUser(new UserReference(14));

        return $repository;
    }

    /**
     * Returns a config value for $configKey.
     *
     * @param string $configKey
     *
     * @throws Exception if $configKey could not be found.
     *
     * @return mixed
     */
    public function getConfigValue($configKey)
    {
        return $this->getServiceContainer()->getParameter($configKey);
    }

    /**
     * Returns a repository specific ID manager.
     *
     * @return \eZ\Publish\API\Repository\Tests\IdManager
     */
    public function getIdManager()
    {
        return new IdManager\Php();
    }

    /**
     * Insert the database data.
     */
    public function insertData()
    {
        $data = $this->getInitialData();
        $handler = $this->getDatabaseHandler();
        $connection = $handler->getConnection();
        $dbPlatform = $connection->getDatabasePlatform();
        $this->cleanupVarDir($this->getInitialVarDir());

        // @todo FIXME: Needs to be in fixture
        $data['ezcontentobject_trash'] = array();
        $data['ezurlwildcard'] = array();
        $data['ezmedia'] = array();
        $data['ezkeyword'] = array();

        foreach ($data as $table => $rows) {

            // Cleanup before inserting (using TRUNCATE for speed, however not possible to rollback)
            $q = $dbPlatform->getTruncateTableSql($handler->quoteIdentifier($table));
            $connection->executeUpdate($q);

            // Check that at least one row exists
            if (!isset($rows[0])) {
                continue;
            }

            $q = $handler->createInsertQuery();
            $q->insertInto($handler->quoteIdentifier($table));

            // Contains the bound parameters
            $values = array();

            // Binding the parameters
            foreach ($rows[0] as $col => $val) {
                $q->set(
                    $handler->quoteIdentifier($col),
                    $q->bindParam($values[$col])
                );
            }

            $stmt = $q->prepare();

            foreach ($rows as $row) {
                try {
                    // This CANNOT be replaced by:
                    // $values = $row
                    // each $values[$col] is a PHP reference which should be
                    // kept for parameters binding to work
                    foreach ($row as $col => $val) {
                        $values[$col] = $val;
                    }

                    $stmt->execute();
                } catch (Exception $e) {
                    echo "$table ( ", implode(', ', $row), " )\n";
                    throw $e;
                }
            }
        }

        $this->applyStatements($this->getPostInsertStatements());
    }

    protected function getInitialVarDir()
    {
        return __DIR__ . '/../../../../../../var';
    }

    protected function cleanupVarDir($sourceDir)
    {
        $fs = new Filesystem();
        $varDir = self::$ioRootDir . '/var';
        if ($fs->exists($varDir)) {
            $fs->remove($varDir);
        }
        $fs->mkdir($varDir);
        $fs->mirror($sourceDir, $varDir);
    }

    /**
     * CLears internal in memory caches after inserting data circumventing the
     * API.
     */
    protected function clearInternalCaches()
    {
        /** @var $handler \eZ\Publish\Core\Persistence\Legacy\Handler */
        $handler = $this->getServiceContainer()->get('ezpublish.spi.persistence.legacy');

        $contentLanguageHandler = $handler->contentLanguageHandler();
        if ($contentLanguageHandler instanceof CachingLanguageHandler) {
            $contentLanguageHandler->clearCache();
        }

        $contentTypeHandler = $handler->contentTypeHandler();
        if ($contentTypeHandler instanceof CachingContentTypeHandler) {
            $contentTypeHandler->clearCache();
        }

        /** @var \eZ\Publish\Core\Persistence\Cache\CacheServiceDecorator $decorator */
        $decorator = $this->getServiceContainer()->get('ezpublish.cache_pool.spi.cache.decorator');

        $decorator->clear();
    }

    /**
     * Returns statements to be executed after data insert.
     *
     * @return string[]
     */
    protected function getPostInsertStatements()
    {
        if (self::$db === 'pgsql') {
            $setvalPath = __DIR__ . '/../../../../Core/Persistence/Legacy/Tests/_fixtures/setval.pgsql.sql';

            return array_filter(preg_split('(;\\s*$)m', file_get_contents($setvalPath)));
        }

        return array();
    }

    /**
     * Returns the initial database data.
     *
     * @return array
     */
    protected function getInitialData()
    {
        if (!isset(self::$initialData)) {
            self::$initialData = include __DIR__ . '/../../../../Core/Repository/Tests/Service/Integration/Legacy/_fixtures/clean_ezdemo_47_dump.php';
            // self::$initialData = include __DIR__ . '/../../../../Core/Repository/Tests/Service/Legacy/_fixtures/full_dump.php';
        }

        return self::$initialData;
    }

    /**
     * Initializes the database schema.
     */
    protected function initializeSchema()
    {
        if (!self::$schemaInitialized) {
            $statements = $this->getSchemaStatements();

            $this->applyStatements($statements);

            self::$schemaInitialized = true;
        }
    }

    /**
     * Applies the given SQL $statements to the database in use.
     *
     * @param array $statements
     */
    protected function applyStatements(array $statements)
    {
        foreach ($statements as $statement) {
            $this->getDatabaseHandler()->exec($statement);
        }
    }

    // ************* Setup copied and refactored from common.php ************

    /**
     * Returns the database schema as an array of SQL statements.
     *
     * @return string[]
     */
    protected function getSchemaStatements()
    {
        $schemaPath = __DIR__ . '/../../../../Core/Persistence/Legacy/Tests/_fixtures/schema.' . self::$db . '.sql';

        return array_filter(preg_split('(;\\s*$)m', file_get_contents($schemaPath)));
    }

    /**
     * Returns the database handler from the service container.
     *
     * @return \eZ\Publish\Core\Persistence\Doctrine\ConnectionHandler
     */
    protected function getDatabaseHandler()
    {
        return $this->getServiceContainer()->get('ezpublish.api.storage_engine.legacy.dbhandler');
    }

    /**
     * Returns the service container used for initialization of the repository.
     *
     * @return \eZ\Publish\Core\Base\ServiceContainer
     */
    public function getServiceContainer()
    {
        if (!isset(self::$serviceContainer)) {
            $config = include __DIR__ . '/../../../../../../config.php';
            $installDir = $config['install_dir'];

            /** @var \Symfony\Component\DependencyInjection\ContainerBuilder $containerBuilder */
            $containerBuilder = include $config['container_builder_path'];

            /* @var \Symfony\Component\DependencyInjection\Loader\YamlFileLoader $loader */
            $loader->load('search_engines/legacy.yml');

            $loader->load('tests/integration_legacy.yml');

            $this->externalBuildContainer($containerBuilder);

            $containerBuilder->setParameter(
                'legacy_dsn',
                self::$dsn
            );

            $containerBuilder->setParameter(
                'io_root_dir',
                self::$ioRootDir . '/' . $containerBuilder->getParameter('storage_dir')
            );

            $containerBuilder->addCompilerPass(new Compiler\Search\SearchEngineSignalSlotPass('legacy'));
            $containerBuilder->addCompilerPass(new Compiler\Search\FieldRegistryPass());

            // load overrides just before creating test Container
            $loader->load('tests/override.yml');

            self::$serviceContainer = new ServiceContainer(
                $containerBuilder,
                $installDir,
                $config['cache_dir'],
                true,
                true
            );
        }

        return self::$serviceContainer;
    }

    /**
     * This is intended to be used from external repository in order to
     * enable container customization.
     *
     * @param \Symfony\Component\DependencyInjection\ContainerBuilder $containerBuilder
     */
    protected function externalBuildContainer(ContainerBuilder $containerBuilder)

    {
        // Does nothing by default
    }

    /**
     * Get the Database name.
     *
     * @return string
     */
    public function getDB()
    {
        return self::$db;
    }
}


1		<?php
2
3		/**
4		* File containing the Test Setup Factory base class.
5		*
6		* @copyright Copyright (C) eZ Systems AS. All rights reserved.
7		* @license For full copyright and license information view LICENSE file distributed with this source code.
8		*/
9		namespace eZ\Publish\API\Repository\Tests\SetupFactory;
10
11		use eZ\Publish\Core\Base\ServiceContainer;
12		use Symfony\Component\DependencyInjection\ContainerBuilder;
13		use eZ\Publish\API\Repository\Tests\SetupFactory;
14		use eZ\Publish\API\Repository\Tests\IdManager;
15		use eZ\Publish\Core\Persistence\Legacy\Content\Type\MemoryCachingHandler as CachingContentTypeHandler;
16		use eZ\Publish\Core\Persistence\Legacy\Content\Language\CachingHandler as CachingLanguageHandler;
17		use Exception;
18		use eZ\Publish\Core\Repository\Values\User\UserReference;
19		use Symfony\Component\Filesystem\Filesystem;
20		use eZ\Publish\Core\Base\Container\Compiler;
21
22		/**
23		* A Test Factory is used to setup the infrastructure for a tests, based on a
24		* specific repository implementation to test.
25		*/
26		class Legacy extends SetupFactory
27		{
28		/**
29		* Data source name.
30		*
31		* @var string
32		*/
33		protected static $dsn;
34
35		/**
36		* Root dir for IO operations.
37		*
38		* @var string
39		*/
40		protected static $ioRootDir;
41
42		/**
43		* Database type (sqlite, mysql, ...).
44		*
45		* @var string
46		*/
47		protected static $db;
48
49		/**
50		* Service container.
51		*
52		* @var \eZ\Publish\Core\Base\ServiceContainer
53		*/
54		protected static $serviceContainer;
55
56		/**
57		* If the DB schema has already been initialized.
58		*
59		* @var bool
60		*/
61		protected static $schemaInitialized = false;
62
63		/**
64		* Initial database data.
65		*
66		* @var array
67		*/
68		protected static $initialData;
69
70		protected $repositoryReference = 'ezpublish.api.repository';
71
72		/**
73		* Creates a new setup factory.
74		*/
75		public function __construct()
76		{
77		self::$dsn = getenv('DATABASE');
78		if (!self::$dsn) {
79		self::$dsn = 'sqlite://:memory:';
80		}
81
82		self::$db = preg_replace('(^([a-z]+).*)', '\\1', self::$dsn);
83
84		if (!isset(self::$ioRootDir)) {
85		self::$ioRootDir = $this->createTemporaryDirectory();
86		}
87		}
88
89		/**
90		* Creates a temporary directory and returns it.
91		*
92		* @return string
93		* @throw \RuntimeException If the root directory can't be created
94		*/
95		private function createTemporaryDirectory()
96		{
97		$tmpFile = tempnam(
98		sys_get_temp_dir(),
99		'ez_legacy_tests_' . time()
100		);
101		unlink($tmpFile);
102
103		$fs = new Filesystem();
104		$fs->mkdir($tmpFile);
105
106		$varDir = $tmpFile . '/var';
107		if ($fs->exists($varDir)) {
108		$fs->remove($varDir);
109		}
110		$fs->mkdir($varDir);
111
112		return $tmpFile;
113		}
114
115		/**
116		* Returns a configured repository for testing.
117		*
118		* @param bool $initializeFromScratch if the back end should be initialized
119		* from scratch or re-used
120		*
121		* @return \eZ\Publish\API\Repository\Repository
122		*/
123		public function getRepository($initializeFromScratch = true)
124		{
125		if ($initializeFromScratch \|\| !self::$schemaInitialized) {
126		$this->initializeSchema();
127		$this->insertData();
128		}
129
130		$this->clearInternalCaches();
131		$repository = $this->getServiceContainer()->get($this->repositoryReference);
132
133		// Set admin user as current user by default
134		$repository->setCurrentUser(new UserReference(14));
135
136		return $repository;
137		}
138
139		/**
140		* Returns a config value for $configKey.
141		*
142		* @param string $configKey
143		*
144		* @throws Exception if $configKey could not be found.
145		*
146		* @return mixed
147		*/
148		public function getConfigValue($configKey)
149		{
150		return $this->getServiceContainer()->getParameter($configKey);
151		}
152
153		/**
154		* Returns a repository specific ID manager.
155		*
156		* @return \eZ\Publish\API\Repository\Tests\IdManager
157		*/
158		public function getIdManager()
159		{
160		return new IdManager\Php();
161		}
162
163		/**
164		* Insert the database data.
165		*/
166		public function insertData()
167		{
168		$data = $this->getInitialData();
169		$handler = $this->getDatabaseHandler();
170		$connection = $handler->getConnection();
171		$dbPlatform = $connection->getDatabasePlatform();
172		$this->cleanupVarDir($this->getInitialVarDir());
173
174		// @todo FIXME: Needs to be in fixture
175		$data['ezcontentobject_trash'] = array();
176		$data['ezurlwildcard'] = array();
177		$data['ezmedia'] = array();
178		$data['ezkeyword'] = array();
179
180	View Code Duplication	foreach ($data as $table => $rows) {
		0 ignored issues – show Duplication introduced 2015-11-21 14:37 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
181		// Cleanup before inserting (using TRUNCATE for speed, however not possible to rollback)
182		$q = $dbPlatform->getTruncateTableSql($handler->quoteIdentifier($table));
183		$connection->executeUpdate($q);
184
185		// Check that at least one row exists
186		if (!isset($rows[0])) {
187		continue;
188		}
189
190		$q = $handler->createInsertQuery();
191		$q->insertInto($handler->quoteIdentifier($table));
192
193		// Contains the bound parameters
194		$values = array();
195
196		// Binding the parameters
197		foreach ($rows[0] as $col => $val) {
198		$q->set(
199		$handler->quoteIdentifier($col),
200		$q->bindParam($values[$col])
201		);
202		}
203
204		$stmt = $q->prepare();
205
206		foreach ($rows as $row) {
207		try {
208		// This CANNOT be replaced by:
209		// $values = $row
210		// each $values[$col] is a PHP reference which should be
211		// kept for parameters binding to work
212		foreach ($row as $col => $val) {
213		$values[$col] = $val;
214		}
215
216		$stmt->execute();
217		} catch (Exception $e) {
218		echo "$table ( ", implode(', ', $row), " )\n";
219		throw $e;
220		}
221		}
222		}
223
224		$this->applyStatements($this->getPostInsertStatements());
225		}
226
227		protected function getInitialVarDir()
228		{
229		return __DIR__ . '/../../../../../../var';
230		}
231
232		protected function cleanupVarDir($sourceDir)
233		{
234		$fs = new Filesystem();
235		$varDir = self::$ioRootDir . '/var';
236		if ($fs->exists($varDir)) {
237		$fs->remove($varDir);
238		}
239		$fs->mkdir($varDir);
240		$fs->mirror($sourceDir, $varDir);
241		}
242
243		/**
244		* CLears internal in memory caches after inserting data circumventing the
245		* API.
246		*/
247		protected function clearInternalCaches()
248		{
249		/** @var $handler \eZ\Publish\Core\Persistence\Legacy\Handler */
250		$handler = $this->getServiceContainer()->get('ezpublish.spi.persistence.legacy');
251
252		$contentLanguageHandler = $handler->contentLanguageHandler();
253		if ($contentLanguageHandler instanceof CachingLanguageHandler) {
254		$contentLanguageHandler->clearCache();
255		}
256
257		$contentTypeHandler = $handler->contentTypeHandler();
258		if ($contentTypeHandler instanceof CachingContentTypeHandler) {
259		$contentTypeHandler->clearCache();
260		}
261
262		/** @var \eZ\Publish\Core\Persistence\Cache\CacheServiceDecorator $decorator */
263		$decorator = $this->getServiceContainer()->get('ezpublish.cache_pool.spi.cache.decorator');
264
265		$decorator->clear();
266		}
267
268		/**
269		* Returns statements to be executed after data insert.
270		*
271		* @return string[]
272		*/
273		protected function getPostInsertStatements()
274		{
275		if (self::$db === 'pgsql') {
276		$setvalPath = __DIR__ . '/../../../../Core/Persistence/Legacy/Tests/_fixtures/setval.pgsql.sql';
277
278		return array_filter(preg_split('(;\\s*$)m', file_get_contents($setvalPath)));
279		}
280
281		return array();
282		}
283
284		/**
285		* Returns the initial database data.
286		*
287		* @return array
288		*/
289		protected function getInitialData()
290		{
291		if (!isset(self::$initialData)) {
292		self::$initialData = include __DIR__ . '/../../../../Core/Repository/Tests/Service/Integration/Legacy/_fixtures/clean_ezdemo_47_dump.php';
293		// self::$initialData = include __DIR__ . '/../../../../Core/Repository/Tests/Service/Legacy/_fixtures/full_dump.php';
294		}
295
296		return self::$initialData;
297		}
298
299		/**
300		* Initializes the database schema.
301		*/
302		protected function initializeSchema()
303		{
304		if (!self::$schemaInitialized) {
305		$statements = $this->getSchemaStatements();
306
307		$this->applyStatements($statements);
308
309		self::$schemaInitialized = true;
310		}
311		}
312
313		/**
314		* Applies the given SQL $statements to the database in use.
315		*
316		* @param array $statements
317		*/
318		protected function applyStatements(array $statements)
319		{
320		foreach ($statements as $statement) {
321		$this->getDatabaseHandler()->exec($statement);
322		}
323		}
324
325		// *********** Setup copied and refactored from common.php **********
326
327		/**
328		* Returns the database schema as an array of SQL statements.
329		*
330		* @return string[]
331		*/
332		protected function getSchemaStatements()
333		{
334		$schemaPath = __DIR__ . '/../../../../Core/Persistence/Legacy/Tests/_fixtures/schema.' . self::$db . '.sql';
335
336		return array_filter(preg_split('(;\\s*$)m', file_get_contents($schemaPath)));
337		}
338
339		/**
340		* Returns the database handler from the service container.
341		*
342		* @return \eZ\Publish\Core\Persistence\Doctrine\ConnectionHandler
343		*/
344		protected function getDatabaseHandler()
345		{
346		return $this->getServiceContainer()->get('ezpublish.api.storage_engine.legacy.dbhandler');
347		}
348
349		/**
350		* Returns the service container used for initialization of the repository.
351		*
352		* @return \eZ\Publish\Core\Base\ServiceContainer
353		*/
354		public function getServiceContainer()
355		{
356		if (!isset(self::$serviceContainer)) {
357		$config = include __DIR__ . '/../../../../../../config.php';
358		$installDir = $config['install_dir'];
359
360		/** @var \Symfony\Component\DependencyInjection\ContainerBuilder $containerBuilder */
361		$containerBuilder = include $config['container_builder_path'];
362
363		/* @var \Symfony\Component\DependencyInjection\Loader\YamlFileLoader $loader */
364		$loader->load('search_engines/legacy.yml');
		0 ignored issues – show Bug introduced 2017-04-18 15:26 UTC by Report Bug Copy Issue Report The variable `$loader` does not exist. Did you forget to declare it? This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug. Loading history...
365		$loader->load('tests/integration_legacy.yml');
366
367		$this->externalBuildContainer($containerBuilder);
368
369		$containerBuilder->setParameter(
370		'legacy_dsn',
371		self::$dsn
372		);
373
374		$containerBuilder->setParameter(
375		'io_root_dir',
376		self::$ioRootDir . '/' . $containerBuilder->getParameter('storage_dir')
377		);
378
379		$containerBuilder->addCompilerPass(new Compiler\Search\SearchEngineSignalSlotPass('legacy'));
380		$containerBuilder->addCompilerPass(new Compiler\Search\FieldRegistryPass());
381
382		// load overrides just before creating test Container
383		$loader->load('tests/override.yml');
384
385		self::$serviceContainer = new ServiceContainer(
386		$containerBuilder,
387		$installDir,
388		$config['cache_dir'],
389		true,
390		true
391		);
392		}
393
394		return self::$serviceContainer;
395		}
396
397		/**
398		* This is intended to be used from external repository in order to
399		* enable container customization.
400		*
401		* @param \Symfony\Component\DependencyInjection\ContainerBuilder $containerBuilder
402		*/
403		protected function externalBuildContainer(ContainerBuilder $containerBuilder)
		0 ignored issues – show Unused Code introduced 2017-07-31 12:38 UTC by Report Bug Copy Issue Report The parameter `$containerBuilder` is not used and could be removed. This check looks from parameters that have been defined for a function or method, but which are not used in the method body. Loading history...
404		{
405		// Does nothing by default
406		}
407
408		/**
409		* Get the Database name.
410		*
411		* @return string
412		*/
413		public function getDB()
414		{
415		return self::$db;
416		}
417		}
418

ezsystems / ezpublish-kernel

Push — EZP-25721_improve_warning ( d7a071...6ed08c )

Legacy::getDatabaseHandler() A

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