File manager

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height:90%'>&lt;?php

namespace Illuminate\Cache;

use Illuminate\Database\Connection;
use Illuminate\Database\DetectsConcurrencyErrors;
use Illuminate\Database\QueryException;
use Throwable;

class DatabaseLock extends Lock
{
    use DetectsConcurrencyErrors;

    /**
     * The database connection instance.
     *
     * @var \Illuminate\Database\Connection
     */
    protected $connection;

    /**
     * The database table name.
     *
     * @var string
     */
    protected $table;

    /**
     * The prune probability odds.
     *
     * @var array{int, int}|null
     */
    protected $lottery;

    /**
     * The default number of seconds that a lock should be held.
     *
     * @var int
     */
    protected $defaultTimeoutInSeconds;

    /**
     * Create a new lock instance.
     *
     * @param  \Illuminate\Database\Connection  $connection
     * @param  string  $table
     * @param  string  $name
     * @param  int  $seconds
     * @param  string|null  $owner
     * @param  array{int, int}|null  $lottery
     * @param  int  $defaultTimeoutInSeconds
     */
    public function __construct(Connection $connection, $table, $name, $seconds, $owner = null, $lottery = [2, 100], $defaultTimeoutInSeconds = 86400)
    {
        parent::__construct($name, $seconds, $owner);

        $this-&gt;connection = $connection;
        $this-&gt;table = $table;
        $this-&gt;lottery = $lottery;
        $this-&gt;defaultTimeoutInSeconds = $defaultTimeoutInSeconds;
    }

    /**
     * Attempt to acquire the lock.
     *
     * @return bool
     *
     * @throws \Throwable
     */
    public function acquire()
    {
        try {
            $this-&gt;connection-&gt;table($this-&gt;table)-&gt;insert([
                &#039;key&#039; =&gt; $this-&gt;name,
                &#039;owner&#039; =&gt; $this-&gt;owner,
                &#039;expiration&#039; =&gt; $this-&gt;expiresAt(),
            ]);

            $acquired = true;
        } catch (QueryException) {
            $updated = $this-&gt;connection-&gt;table($this-&gt;table)
                -&gt;where(&#039;key&#039;, $this-&gt;name)
                -&gt;where(function ($query) {
                    return $query-&gt;where(&#039;owner&#039;, $this-&gt;owner)-&gt;orWhere(&#039;expiration&#039;, &#039;&lt;=&#039;, $this-&gt;currentTime());
                })-&gt;update([
                    &#039;owner&#039; =&gt; $this-&gt;owner,
                    &#039;expiration&#039; =&gt; $this-&gt;expiresAt(),
                ]);

            $acquired = $updated &gt;= 1;
        }

        if (count($this-&gt;lottery ?? []) === 2 &amp;&amp; random_int(1, $this-&gt;lottery[1]) &lt;= $this-&gt;lottery[0]) {
            $this-&gt;pruneExpiredLocks();
        }

        return $acquired;
    }

    /**
     * Get the UNIX timestamp indicating when the lock should expire.
     *
     * @return int
     */
    protected function expiresAt()
    {
        $lockTimeout = $this-&gt;seconds &gt; 0 ? $this-&gt;seconds : $this-&gt;defaultTimeoutInSeconds;

        return $this-&gt;currentTime() + $lockTimeout;
    }

    /**
     * Release the lock.
     *
     * @return bool
     */
    public function release()
    {
        if ($this-&gt;isOwnedByCurrentProcess()) {
            $this-&gt;connection-&gt;table($this-&gt;table)
                -&gt;where(&#039;key&#039;, $this-&gt;name)
                -&gt;where(&#039;owner&#039;, $this-&gt;owner)
                -&gt;delete();

            return true;
        }

        return false;
    }

    /**
     * Releases this lock in disregard of ownership.
     *
     * @return void
     */
    public function forceRelease()
    {
        $this-&gt;connection-&gt;table($this-&gt;table)
            -&gt;where(&#039;key&#039;, $this-&gt;name)
            -&gt;delete();
    }

    /**
     * Deletes locks that are past expiration.
     *
     * @return void
     *
     * @throws \Throwable
     */
    public function pruneExpiredLocks()
    {
        try {
            $this-&gt;connection-&gt;table($this-&gt;table)
                -&gt;where(&#039;expiration&#039;, &#039;&lt;=&#039;, $this-&gt;currentTime())
                -&gt;delete();
        } catch (Throwable $e) {
            if (! $this-&gt;causedByConcurrencyError($e)) {
                throw $e;
            }
        }
    }

    /**
     * Returns the owner value written into the driver for this lock.
     *
     * @return string|null
     */
    protected function getCurrentOwner()
    {
        return $this-&gt;connection-&gt;table($this-&gt;table)-&gt;where(&#039;key&#039;, $this-&gt;name)-&gt;first()?-&gt;owner;
    }

    /**
     * Get the name of the database connection being used to manage the lock.
     *
     * @return string
     */
    public function getConnectionName()
    {
        return $this-&gt;connection-&gt;getName();
    }
}
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