CommunitySolidServer/docs/classes/util_locking_redisresourcelocker.redisresourcelocker.html
2021-07-23 22:06:41 +00:00

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<a href="../modules/util_locking_redisresourcelocker.html">util/locking/RedisResourceLocker</a>
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<a href="util_locking_redisresourcelocker.redisresourcelocker.html">RedisResourceLocker</a>
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<h1>Class RedisResourceLocker</h1>
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<p>A locking system that uses a Redis server or any number of
Redis nodes / clusters
This solution has issues though:</p>
<ul>
<li>Redlock wants to handle expiration itself, this is against the design of a ResourceLocker.
The workaround for this is to extend an active lock indefinitely.</li>
<li>This solution is not multithreaded! If threadA locks a resource, only threadA can unlock this resource.
If threadB wont be able to lock a resource if threadA already acquired that lock,
in that sense it is kind of multithreaded.</li>
<li>Redlock does not provide the ability to see which locks have expired</li>
</ul>
</div>
</div>
</section>
<section class="tsd-panel tsd-hierarchy">
<h3>Hierarchy</h3>
<ul class="tsd-hierarchy">
<li>
<span class="target">RedisResourceLocker</span>
</li>
</ul>
</section>
<section class="tsd-panel">
<h3>Implements</h3>
<ul class="tsd-hierarchy">
<li><a href="../interfaces/util_locking_resourcelocker.resourcelocker.html" class="tsd-signature-type" data-tsd-kind="Interface">ResourceLocker</a></li>
<li><a href="../interfaces/init_final_finalizable.finalizable.html" class="tsd-signature-type" data-tsd-kind="Interface">Finalizable</a></li>
</ul>
</section>
<section class="tsd-panel-group tsd-index-group">
<h2>Index</h2>
<section class="tsd-panel tsd-index-panel">
<div class="tsd-index-content">
<section class="tsd-index-section ">
<h3>Constructors</h3>
<ul class="tsd-index-list">
<li class="tsd-kind-constructor tsd-parent-kind-class"><a href="util_locking_redisresourcelocker.redisresourcelocker.html#constructor" class="tsd-kind-icon">constructor</a></li>
</ul>
</section>
<section class="tsd-index-section tsd-is-private-protected">
<h3>Properties</h3>
<ul class="tsd-index-list">
<li class="tsd-kind-property tsd-parent-kind-class tsd-is-private"><a href="util_locking_redisresourcelocker.redisresourcelocker.html#lockmap" class="tsd-kind-icon">lock<wbr>Map</a></li>
<li class="tsd-kind-property tsd-parent-kind-class tsd-is-protected"><a href="util_locking_redisresourcelocker.redisresourcelocker.html#logger" class="tsd-kind-icon">logger</a></li>
<li class="tsd-kind-property tsd-parent-kind-class tsd-is-private"><a href="util_locking_redisresourcelocker.redisresourcelocker.html#redlock" class="tsd-kind-icon">redlock</a></li>
</ul>
</section>
<section class="tsd-index-section ">
<h3>Methods</h3>
<ul class="tsd-index-list">
<li class="tsd-kind-method tsd-parent-kind-class"><a href="util_locking_redisresourcelocker.redisresourcelocker.html#acquire" class="tsd-kind-icon">acquire</a></li>
<li class="tsd-kind-method tsd-parent-kind-class tsd-is-private"><a href="util_locking_redisresourcelocker.redisresourcelocker.html#createredisclients" class="tsd-kind-icon">create<wbr>Redis<wbr>Clients</a></li>
<li class="tsd-kind-method tsd-parent-kind-class tsd-is-private"><a href="util_locking_redisresourcelocker.redisresourcelocker.html#createredlock" class="tsd-kind-icon">create<wbr>Redlock</a></li>
<li class="tsd-kind-method tsd-parent-kind-class tsd-is-private"><a href="util_locking_redisresourcelocker.redisresourcelocker.html#extendlockindefinitely" class="tsd-kind-icon">extend<wbr>Lock<wbr>Indefinitely</a></li>
<li class="tsd-kind-method tsd-parent-kind-class"><a href="util_locking_redisresourcelocker.redisresourcelocker.html#finalize" class="tsd-kind-icon">finalize</a></li>
<li class="tsd-kind-method tsd-parent-kind-class tsd-is-private"><a href="util_locking_redisresourcelocker.redisresourcelocker.html#getlockcount" class="tsd-kind-icon">get<wbr>Lock<wbr>Count</a></li>
<li class="tsd-kind-method tsd-parent-kind-class"><a href="util_locking_redisresourcelocker.redisresourcelocker.html#release" class="tsd-kind-icon">release</a></li>
</ul>
</section>
</div>
</section>
</section>
<section class="tsd-panel-group tsd-member-group ">
<h2>Constructors</h2>
<section class="tsd-panel tsd-member tsd-kind-constructor tsd-parent-kind-class">
<a name="constructor" class="tsd-anchor"></a>
<h3>constructor</h3>
<ul class="tsd-signatures tsd-kind-constructor tsd-parent-kind-class">
<li class="tsd-signature tsd-kind-icon">new <wbr>Redis<wbr>Resource<wbr>Locker<span class="tsd-signature-symbol">(</span>redisClients<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">[]</span>, redlockOptions<span class="tsd-signature-symbol">?: </span><span class="tsd-signature-type">Record</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">number</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="util_locking_redisresourcelocker.redisresourcelocker.html" class="tsd-signature-type" data-tsd-kind="Class">RedisResourceLocker</a></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/solid/community-server/blob/0be8222/src/util/locking/RedisResourceLocker.ts#L45">src/util/locking/RedisResourceLocker.ts:45</a></li>
</ul>
</aside>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>redisClients: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">[]</span></h5>
</li>
<li>
<h5><span class="tsd-flag ts-flagOptional">Optional</span> redlockOptions: <span class="tsd-signature-type">Record</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">number</span><span class="tsd-signature-symbol">&gt;</span></h5>
</li>
</ul>
<h4 class="tsd-returns-title">Returns <a href="util_locking_redisresourcelocker.redisresourcelocker.html" class="tsd-signature-type" data-tsd-kind="Class">RedisResourceLocker</a></h4>
</li>
</ul>
</section>
</section>
<section class="tsd-panel-group tsd-member-group tsd-is-private-protected">
<h2>Properties</h2>
<section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-class tsd-is-private">
<a name="lockmap" class="tsd-anchor"></a>
<h3><span class="tsd-flag ts-flagPrivate">Private</span> <span class="tsd-flag ts-flagReadonly">Readonly</span> lock<wbr>Map</h3>
<div class="tsd-signature tsd-kind-icon">lock<wbr>Map<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">Map</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-symbol">{ </span>interval<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Timeout</span><span class="tsd-signature-symbol">; </span>lock<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Lock</span><span class="tsd-signature-symbol"> }</span><span class="tsd-signature-symbol">&gt;</span></div>
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/solid/community-server/blob/0be8222/src/util/locking/RedisResourceLocker.ts#L45">src/util/locking/RedisResourceLocker.ts:45</a></li>
</ul>
</aside>
</section>
<section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-class tsd-is-protected">
<a name="logger" class="tsd-anchor"></a>
<h3><span class="tsd-flag ts-flagProtected">Protected</span> <span class="tsd-flag ts-flagReadonly">Readonly</span> logger</h3>
<div class="tsd-signature tsd-kind-icon">logger<span class="tsd-signature-symbol">:</span> <a href="logging_logger.logger.html" class="tsd-signature-type" data-tsd-kind="Class">Logger</a><span class="tsd-signature-symbol"> = ...</span></div>
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/solid/community-server/blob/0be8222/src/util/locking/RedisResourceLocker.ts#L42">src/util/locking/RedisResourceLocker.ts:42</a></li>
</ul>
</aside>
</section>
<section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-class tsd-is-private">
<a name="redlock" class="tsd-anchor"></a>
<h3><span class="tsd-flag ts-flagPrivate">Private</span> <span class="tsd-flag ts-flagReadonly">Readonly</span> redlock</h3>
<div class="tsd-signature tsd-kind-icon">redlock<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">Redlock</span></div>
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/solid/community-server/blob/0be8222/src/util/locking/RedisResourceLocker.ts#L44">src/util/locking/RedisResourceLocker.ts:44</a></li>
</ul>
</aside>
</section>
</section>
<section class="tsd-panel-group tsd-member-group ">
<h2>Methods</h2>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
<a name="acquire" class="tsd-anchor"></a>
<h3>acquire</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class">
<li class="tsd-signature tsd-kind-icon">acquire<span class="tsd-signature-symbol">(</span>identifier<span class="tsd-signature-symbol">: </span><a href="../interfaces/ldp_representation_resourceidentifier.resourceidentifier.html" class="tsd-signature-type" data-tsd-kind="Interface">ResourceIdentifier</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">&gt;</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<aside class="tsd-sources">
<p>Implementation of ResourceLocker.acquire</p>
<ul>
<li>Defined in <a href="https://github.com/solid/community-server/blob/0be8222/src/util/locking/RedisResourceLocker.ts#L113">src/util/locking/RedisResourceLocker.ts:113</a></li>
</ul>
</aside>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>identifier: <a href="../interfaces/ldp_representation_resourceidentifier.resourceidentifier.html" class="tsd-signature-type" data-tsd-kind="Interface">ResourceIdentifier</a></h5>
</li>
</ul>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">&gt;</span></h4>
</li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class tsd-is-private">
<a name="createredisclients" class="tsd-anchor"></a>
<h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Redis<wbr>Clients</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class tsd-is-private">
<li class="tsd-signature tsd-kind-icon">create<wbr>Redis<wbr>Clients<span class="tsd-signature-symbol">(</span>redisClientsStrings<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">RedisClient</span><span class="tsd-signature-symbol">[]</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/solid/community-server/blob/0be8222/src/util/locking/RedisResourceLocker.ts#L64">src/util/locking/RedisResourceLocker.ts:64</a></li>
</ul>
</aside>
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>Generate and return a list of RedisClients based on the provided strings</p>
</div>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>redisClientsStrings: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">[]</span></h5>
<div class="tsd-comment tsd-typography">
<p>a list of strings that contain either a host address and a
port number like &#39;127.0.0.1:6379&#39; or just a port number like &#39;6379&#39;</p>
</div>
</li>
</ul>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">RedisClient</span><span class="tsd-signature-symbol">[]</span></h4>
</li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class tsd-is-private">
<a name="createredlock" class="tsd-anchor"></a>
<h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Redlock</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class tsd-is-private">
<li class="tsd-signature tsd-kind-icon">create<wbr>Redlock<span class="tsd-signature-symbol">(</span>clients<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">RedisClient</span><span class="tsd-signature-symbol">[]</span>, redlockOptions<span class="tsd-signature-symbol">?: </span><span class="tsd-signature-type">Record</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">number</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Redlock</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/solid/community-server/blob/0be8222/src/util/locking/RedisResourceLocker.ts#L90">src/util/locking/RedisResourceLocker.ts:90</a></li>
</ul>
</aside>
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>Generate and return a Redlock instance</p>
</div>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>clients: <span class="tsd-signature-type">RedisClient</span><span class="tsd-signature-symbol">[]</span></h5>
<div class="tsd-comment tsd-typography">
<p>a list of RedisClients you want to use for the redlock instance</p>
</div>
</li>
<li>
<h5>redlockOptions: <span class="tsd-signature-type">Record</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">number</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol"> = {}</span></h5>
<div class="tsd-comment tsd-typography">
<p>extra redlock options to overwrite the default config</p>
</div>
</li>
</ul>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Redlock</span></h4>
</li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class tsd-is-private">
<a name="extendlockindefinitely" class="tsd-anchor"></a>
<h3><span class="tsd-flag ts-flagPrivate">Private</span> extend<wbr>Lock<wbr>Indefinitely</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class tsd-is-private">
<li class="tsd-signature tsd-kind-icon">extend<wbr>Lock<wbr>Indefinitely<span class="tsd-signature-symbol">(</span>identifier<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Timeout</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/solid/community-server/blob/0be8222/src/util/locking/RedisResourceLocker.ts#L163">src/util/locking/RedisResourceLocker.ts:163</a></li>
</ul>
</aside>
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>This function is internally used to keep an acquired lock active, a wrapper class will handle expiration</p>
</div>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>identifier: <span class="tsd-signature-type">string</span></h5>
<div class="tsd-comment tsd-typography">
<p>Identifier of the lock to be extended</p>
</div>
</li>
</ul>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Timeout</span></h4>
</li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
<a name="finalize" class="tsd-anchor"></a>
<h3>finalize</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class">
<li class="tsd-signature tsd-kind-icon">finalize<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">&gt;</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<aside class="tsd-sources">
<p>Implementation of Finalizable.finalize</p>
<ul>
<li>Defined in <a href="https://github.com/solid/community-server/blob/0be8222/src/util/locking/RedisResourceLocker.ts#L101">src/util/locking/RedisResourceLocker.ts:101</a></li>
</ul>
</aside>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">&gt;</span></h4>
</li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class tsd-is-private">
<a name="getlockcount" class="tsd-anchor"></a>
<h3><span class="tsd-flag ts-flagPrivate">Private</span> get<wbr>Lock<wbr>Count</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class tsd-is-private">
<li class="tsd-signature tsd-kind-icon">get<wbr>Lock<wbr>Count<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">number</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<aside class="tsd-sources">
<ul>
<li>Defined in <a href="https://github.com/solid/community-server/blob/0be8222/src/util/locking/RedisResourceLocker.ts#L155">src/util/locking/RedisResourceLocker.ts:155</a></li>
</ul>
</aside>
<div class="tsd-comment tsd-typography">
<div class="lead">
<p>Counts the number of active locks.</p>
</div>
</div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4>
</li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
<a name="release" class="tsd-anchor"></a>
<h3>release</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class">
<li class="tsd-signature tsd-kind-icon">release<span class="tsd-signature-symbol">(</span>identifier<span class="tsd-signature-symbol">: </span><a href="../interfaces/ldp_representation_resourceidentifier.resourceidentifier.html" class="tsd-signature-type" data-tsd-kind="Interface">ResourceIdentifier</a><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">&gt;</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<aside class="tsd-sources">
<p>Implementation of ResourceLocker.release</p>
<ul>
<li>Defined in <a href="https://github.com/solid/community-server/blob/0be8222/src/util/locking/RedisResourceLocker.ts#L132">src/util/locking/RedisResourceLocker.ts:132</a></li>
</ul>
</aside>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>identifier: <a href="../interfaces/ldp_representation_resourceidentifier.resourceidentifier.html" class="tsd-signature-type" data-tsd-kind="Interface">ResourceIdentifier</a></h5>
</li>
</ul>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">&gt;</span></h4>
</li>
</ul>
</section>
</section>
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