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<!DOCTYPE html><html class="default"><head><meta charSet="utf-8"/><meta http-equiv="x-ua-compatible" content="IE=edge"/><title>RedisLocker | Community Solid Server - v5.0.0-alpha.0</title><meta name="description" content="Documentation for Community Solid Server - v5.0.0-alpha.0"/><meta name="viewport" content="width=device-width, initial-scale=1"/><link rel="stylesheet" href="../assets/style.css"/><link rel="stylesheet" href="../assets/highlight.css"/><script async src="../assets/search.js" id="search-script"></script></head><body><script>document.body.classList.add(localStorage.getItem("tsd-theme") || "os")</script><header><div class="tsd-page-toolbar"><div class="container"><div class="table-wrap"><div class="table-cell" id="tsd-search" data-base=".."><div class="field"><label for="tsd-search-field" class="tsd-widget search no-caption">Search</label><input type="text" id="tsd-search-field"/></div><ul class="results"><li class="state loading">Preparing search index...</li><li class="state failure">The search index is not available</li></ul><a href="../index.html" class="title">Community Solid Server - v5.0.0-alpha.0</a></div><div class="table-cell" id="tsd-widgets"><div id="tsd-filter"><a href="#" class="tsd-widget options no-caption" data-toggle="options">Options</a><div class="tsd-filter-group"><div class="tsd-select" id="tsd-filter-visibility"><span class="tsd-select-label">All</span><ul class="tsd-select-list"><li data-value="public">Public</li><li data-value="protected">Public/Protected</li><li data-value="private" class="selected">All</li></ul></div> <input type="checkbox" id="tsd-filter-inherited" checked/><label class="tsd-widget" for="tsd-filter-inherited">Inherited</label><input type="checkbox" id="tsd-filter-externals" checked/><label class="tsd-widget" for="tsd-filter-externals">Externals</label></div></div><a href="#" class="tsd-widget menu no-caption" data-toggle="menu">Menu</a></div></div></div></div><div class="tsd-page-title"><div class="container"><ul class="tsd-breadcrumb"><li><a href="../modules.html">Community Solid Server - v5.0.0-alpha.0</a></li><li><a href="RedisLocker.html">RedisLocker</a></li></ul><h1>Class RedisLocker</h1></div></div></header><div class="container container-main"><div class="row"><div class="col-8 col-content"><section class="tsd-panel tsd-comment"><div class="tsd-comment tsd-typography"><div class="lead">
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<p>A Redis Locker that can be used as both:</p>
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<ul>
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<li>a Read Write Locker that uses a (single) Redis server to store the locks and counts.</li>
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<li>a Resource Locker that uses a (single) Redis server to store the lock.
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This solution should be process-safe. The only references to locks are string keys
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derived from identifier paths.</li>
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</ul>
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</div><div><p>The Read Write algorithm roughly goes as follows:</p>
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<ul>
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<li>Acquire a read lock: allowed as long as there is no write lock. On acquiring the read counter goes up.</li>
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<li>Acquire a write lock: allowed as long as there is no other write lock AND the read counter is 0.</li>
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<li>Release a read lock: decreases the read counter with 1</li>
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<li>Release a write lock: unlocks the write lock</li>
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</ul>
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<p>The Resource locking algorithm uses a single mutex/lock.</p>
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<p>All operations, such as checking for a write lock AND read count, are executed in a single Lua script.
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These scripts are used by Redis as a single new command.
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Redis executes its operations in a single thread, as such, each such operation can be considered atomic.</p>
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<p>The operation to (un)lock will always resolve with either 1/OK/true if succeeded or 0/false if not succeeded.
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Rejection with errors will be happen on actual failures. Retrying the (un)lock operations will be done by making
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use of the LockUtils' {@link retryFunctionUntil} function.</p>
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<ul>
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<li>@see <a href="https://redis.io/commands/">Redis Commands documentation</a></li>
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<li>@see <a href="https://redis.io/docs/manual/programmability/">Redis Lua scripting documentation</a></li>
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<li>@see <a href="https://github.com/luin/ioredis#lua-scripting">ioredis Lua scripting API</a></li>
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</ul>
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</div></div></section><section class="tsd-panel tsd-hierarchy"><h3>Hierarchy</h3><ul class="tsd-hierarchy"><li><span class="target">RedisLocker</span></li></ul></section><section class="tsd-panel"><h3>Implements</h3><ul class="tsd-hierarchy"><li><a href="../interfaces/ReadWriteLocker.html" class="tsd-signature-type" data-tsd-kind="Interface">ReadWriteLocker</a></li><li><a href="../interfaces/ResourceLocker.html" class="tsd-signature-type" data-tsd-kind="Interface">ResourceLocker</a></li><li><a href="../interfaces/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="RedisLocker.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="RedisLocker.html#attemptSettings" class="tsd-kind-icon">attempt<wbr/>Settings</a></li><li class="tsd-kind-property tsd-parent-kind-class tsd-is-protected"><a href="RedisLocker.html#logger" class="tsd-kind-icon">logger</a></li><li class="tsd-kind-property tsd-parent-kind-class tsd-is-private"><a href="RedisLocker.html#redis" class="tsd-kind-icon">redis</a></li><li class="tsd-kind-property tsd-parent-kind-class tsd-is-private"><a href="RedisLocker.html#redisLock" class="tsd-kind-icon">redis<wbr/>Lock</a></li><li class="tsd-kind-property tsd-parent-kind-class tsd-is-private"><a href="RedisLocker.html#redisRw" class="tsd-kind-icon">redis<wbr/>Rw</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="RedisLocker.html#acquire" class="tsd-kind-icon">acquire</a></li><li class="tsd-kind-method tsd-parent-kind-class tsd-is-private"><a href="RedisLocker.html#createRedisClient" class="tsd-kind-icon">create<wbr/>Redis<wbr/>Client</a></li><li class="tsd-kind-method tsd-parent-kind-class"><a href="RedisLocker.html#finalize" class="tsd-kind-icon">finalize</a></li><li class="tsd-kind-method tsd-parent-kind-class tsd-is-private"><a href="RedisLocker.html#getReadWriteKey" class="tsd-kind-icon">get<wbr/>Read<wbr/>Write<wbr/>Key</a></li><li class="tsd-kind-method tsd-parent-kind-class tsd-is-private"><a href="RedisLocker.html#getResourceKey" class="tsd-kind-icon">get<wbr/>Resource<wbr/>Key</a></li><li class="tsd-kind-method tsd-parent-kind-class"><a href="RedisLocker.html#release" class="tsd-kind-icon">release</a></li><li class="tsd-kind-method tsd-parent-kind-class tsd-is-private"><a href="RedisLocker.html#swallowFalse" class="tsd-kind-icon">swallow<wbr/>False</a></li><li class="tsd-kind-method tsd-parent-kind-class tsd-has-type-parameter"><a href="RedisLocker.html#withReadLock" class="tsd-kind-icon">with<wbr/>Read<wbr/>Lock</a></li><li class="tsd-kind-method tsd-parent-kind-class tsd-has-type-parameter"><a href="RedisLocker.html#withWriteLock" class="tsd-kind-icon">with<wbr/>Write<wbr/>Lock</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 id="constructor" class="tsd-anchor"></a><h3 class="tsd-anchor-link">constructor<a href="#constructor" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><ul class="tsd-signatures tsd-kind-constructor tsd-parent-kind-class"><li class="tsd-signature tsd-kind-icon">new <wbr/>Redis<wbr/>Locker<span class="tsd-signature-symbol">(</span>redisClient<span class="tsd-signature-symbol">?: </span><span class="tsd-signature-type">string</span>, attemptSettings<span class="tsd-signature-symbol">?: </span><span class="tsd-signature-type">AttemptSettings</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><a href="RedisLocker.html" class="tsd-signature-type" data-tsd-kind="Class">RedisLocker</a></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L53">src/util/locking/RedisLocker.ts:53</a></li></ul></aside><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameters"><li><h5>redisClient: <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"> = '127.0.0.1:6379'</span></h5></li><li><h5>attemptSettings: <span class="tsd-signature-type">AttemptSettings</span><span class="tsd-signature-symbol"> = {}</span></h5></li></ul><h4 class="tsd-returns-title">Returns <a href="RedisLocker.html" class="tsd-signature-type" data-tsd-kind="Class">RedisLocker</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 id="attemptSettings" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagPrivate">Private</span> <span class="tsd-flag ts-flagReadonly">Readonly</span> attempt<wbr/>Settings<a href="#attemptSettings" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><div class="tsd-signature tsd-kind-icon">attempt<wbr/>Settings<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">Required</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type">AttemptSettings</span><span class="tsd-signature-symbol">></span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L51">src/util/locking/RedisLocker.ts:51</a></li></ul></aside></section><section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-class tsd-is-protected"><a id="logger" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagProtected">Protected</span> <span class="tsd-flag ts-flagReadonly">Readonly</span> logger<a href="#logger" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><div class="tsd-signature tsd-kind-icon">logger<span class="tsd-signature-symbol">:</span> <a href="../interfaces/Logger.html" class="tsd-signature-type" data-tsd-kind="Interface">Logger</a><span class="tsd-signature-symbol"> = ...</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L46">src/util/locking/RedisLocker.ts:46</a></li></ul></aside></section><section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-class tsd-is-private"><a id="redis" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagPrivate">Private</span> <span class="tsd-flag ts-flagReadonly">Readonly</span> redis<a href="#redis" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><div class="tsd-signature tsd-kind-icon">redis<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">Redis</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L48">src/util/locking/RedisLocker.ts:48</a></li></ul></aside></section><section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-class tsd-is-private"><a id="redisLock" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagPrivate">Private</span> <span class="tsd-flag ts-flagReadonly">Readonly</span> redis<wbr/>Lock<a href="#redisLock" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><div class="tsd-signature tsd-kind-icon">redis<wbr/>Lock<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">RedisResourceLock</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L50">src/util/locking/RedisLocker.ts:50</a></li></ul></aside></section><section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-class tsd-is-private"><a id="redisRw" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagPrivate">Private</span> <span class="tsd-flag ts-flagReadonly">Readonly</span> redis<wbr/>Rw<a href="#redisRw" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><div class="tsd-signature tsd-kind-icon">redis<wbr/>Rw<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">RedisReadWriteLock</span></div><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L49">src/util/locking/RedisLocker.ts:49</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 id="acquire" class="tsd-anchor"></a><h3 class="tsd-anchor-link">acquire<a href="#acquire" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></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/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"><</span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">></span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><p>Implementation of <a href="../interfaces/ResourceLocker.html">ResourceLocker</a>.<a href="../interfaces/ResourceLocker.html#acquire">acquire</a></p><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L159">src/util/locking/RedisLocker.ts:159</a></li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
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<p>Acquires a lock on the requested identifier.
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The promise will resolve when the lock has been acquired.</p>
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</div></div><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameters"><li><h5>identifier: <a href="../interfaces/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"><</span><span class="tsd-signature-type">void</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 id="createRedisClient" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr/>Redis<wbr/>Client<a href="#createRedisClient" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></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/>Client<span class="tsd-signature-symbol">(</span>redisClientString<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">Redis</span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L71">src/util/locking/RedisLocker.ts:71</a></li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
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<p>Generate and return a RedisClient based on the provided string</p>
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</div></div><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameters"><li><h5>redisClientString: <span class="tsd-signature-type">string</span></h5><div class="tsd-comment tsd-typography"><div class="lead">
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<p>A string that contains either a host address and a
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port number like '127.0.0.1:6379' or just a port number like '6379'.</p>
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</div></div></li></ul><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Redis</span></h4></li></ul></section><section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class"><a id="finalize" class="tsd-anchor"></a><h3 class="tsd-anchor-link">finalize<a href="#finalize" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></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"><</span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">></span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><p>Implementation of <a href="../interfaces/Finalizable.html">Finalizable</a>.<a href="../interfaces/Finalizable.html#finalize">finalize</a></p><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L177">src/util/locking/RedisLocker.ts:177</a></li></ul></aside><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type">void</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 id="getReadWriteKey" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagPrivate">Private</span> get<wbr/>Read<wbr/>Write<wbr/>Key<a href="#getReadWriteKey" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class tsd-is-private"><li class="tsd-signature tsd-kind-icon">get<wbr/>Read<wbr/>Write<wbr/>Key<span class="tsd-signature-symbol">(</span>identifier<span class="tsd-signature-symbol">: </span><a href="../interfaces/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">string</span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L94">src/util/locking/RedisLocker.ts:94</a></li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
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<p>Create a scoped Redis key for Read-Write locking.</p>
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</div></div><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameters"><li><h5>identifier: <a href="../interfaces/ResourceIdentifier.html" class="tsd-signature-type" data-tsd-kind="Interface">ResourceIdentifier</a></h5><div class="tsd-comment tsd-typography"><div class="lead">
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<p>The identifier object to create a Redis key for</p>
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</div></div></li></ul><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">string</span></h4><div><p>A scoped Redis key that allows cleanup afterwards without affecting other keys.</p>
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</div></li></ul></section><section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class tsd-is-private"><a id="getResourceKey" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagPrivate">Private</span> get<wbr/>Resource<wbr/>Key<a href="#getResourceKey" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class tsd-is-private"><li class="tsd-signature tsd-kind-icon">get<wbr/>Resource<wbr/>Key<span class="tsd-signature-symbol">(</span>identifier<span class="tsd-signature-symbol">: </span><a href="../interfaces/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">string</span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L103">src/util/locking/RedisLocker.ts:103</a></li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
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<p>Create a scoped Redis key for Resource locking.</p>
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</div></div><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameters"><li><h5>identifier: <a href="../interfaces/ResourceIdentifier.html" class="tsd-signature-type" data-tsd-kind="Interface">ResourceIdentifier</a></h5><div class="tsd-comment tsd-typography"><div class="lead">
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<p>The identifier object to create a Redis key for</p>
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</div></div></li></ul><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">string</span></h4><div><p>A scoped Redis key that allows cleanup afterwards without affecting other keys.</p>
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</div></li></ul></section><section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class"><a id="release" class="tsd-anchor"></a><h3 class="tsd-anchor-link">release<a href="#release" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></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/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"><</span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">></span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><p>Implementation of <a href="../interfaces/ResourceLocker.html">ResourceLocker</a>.<a href="../interfaces/ResourceLocker.html#release">release</a></p><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L167">src/util/locking/RedisLocker.ts:167</a></li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
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<p>Releases a lock on the requested identifier.
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The promise will resolve when the lock has been released.
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In case there is no lock on the resource an error should be thrown.</p>
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</div></div><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameters"><li><h5>identifier: <a href="../interfaces/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"><</span><span class="tsd-signature-type">void</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 id="swallowFalse" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><span class="tsd-flag ts-flagPrivate">Private</span> swallow<wbr/>False<a href="#swallowFalse" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class tsd-is-private"><li class="tsd-signature tsd-kind-icon">swallow<wbr/>False<span class="tsd-signature-symbol">(</span>fn<span class="tsd-signature-symbol">: </span><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"><</span><span class="tsd-signature-type">RedisAnswer</span><span class="tsd-signature-symbol">></span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><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"><</span><span class="tsd-signature-type">unknown</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/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L115">src/util/locking/RedisLocker.ts:115</a></li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
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<p>Wrapper function for all (un)lock operations. If the <code>fn()</code> resolves to false (after applying
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{@link fromResp2ToBool}, the result will be swallowed. When <code>fn()</code> resolves to true, this wrapper
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will return true. Any error coming from <code>fn()</code> will be thrown.</p>
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</div></div><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameters"><li><h5>fn: <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"><</span><span class="tsd-signature-type">RedisAnswer</span><span class="tsd-signature-symbol">></span></h5><div class="tsd-comment tsd-typography"><div class="lead">
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<p>The function reference to swallow false from.</p>
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</div></div><ul class="tsd-parameters"><li class="tsd-parameter-signature"><ul class="tsd-signatures tsd-kind-type-literal"><li class="tsd-signature tsd-kind-icon"><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"><</span><span class="tsd-signature-type">RedisAnswer</span><span class="tsd-signature-symbol">></span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type">RedisAnswer</span><span class="tsd-signature-symbol">></span></h4></li></ul></li></ul></li></ul><h4 class="tsd-returns-title">Returns <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"><</span><span class="tsd-signature-type">unknown</span><span class="tsd-signature-symbol">></span></h4><ul class="tsd-parameters"><li class="tsd-parameter-signature"><ul class="tsd-signatures tsd-kind-type-literal"><li class="tsd-signature tsd-kind-icon"><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"><</span><span class="tsd-signature-type">unknown</span><span class="tsd-signature-symbol">></span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><div class="tsd-comment tsd-typography"><div class="lead">
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<p>Wrapper function for all (un)lock operations. If the <code>fn()</code> resolves to false (after applying
|
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{@link fromResp2ToBool}, the result will be swallowed. When <code>fn()</code> resolves to true, this wrapper
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will return true. Any error coming from <code>fn()</code> will be thrown.</p>
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</div></div><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type">unknown</span><span class="tsd-signature-symbol">></span></h4></li></ul></li></ul></li></ul></section><section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class tsd-has-type-parameter"><a id="withReadLock" class="tsd-anchor"></a><h3 class="tsd-anchor-link">with<wbr/>Read<wbr/>Lock<a href="#withReadLock" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class tsd-has-type-parameter"><li class="tsd-signature tsd-kind-icon">with<wbr/>Read<wbr/>Lock<span class="tsd-signature-symbol"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol">></span><span class="tsd-signature-symbol">(</span>identifier<span class="tsd-signature-symbol">: </span><a href="../interfaces/ResourceIdentifier.html" class="tsd-signature-type" data-tsd-kind="Interface">ResourceIdentifier</a>, whileLocked<span class="tsd-signature-symbol">: </span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> => </span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><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"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol">></span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><p>Implementation of <a href="../interfaces/ReadWriteLocker.html">ReadWriteLocker</a>.<a href="../interfaces/ReadWriteLocker.html#withReadLock">withReadLock</a></p><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L125">src/util/locking/RedisLocker.ts:125</a></li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
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<p>Run the given function while the resource is locked.
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The lock will be released when the (async) input function resolves.
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This function should be used for operations that only require reading the resource.</p>
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</div></div><h4 class="tsd-type-parameters-title">Type parameters</h4><ul class="tsd-type-parameters"><li><h4>T</h4></li></ul><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameters"><li><h5>identifier: <a href="../interfaces/ResourceIdentifier.html" class="tsd-signature-type" data-tsd-kind="Interface">ResourceIdentifier</a></h5></li><li><h5>whileLocked: <span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> => </span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol">></span></h5><ul class="tsd-parameters"><li class="tsd-parameter-signature"><ul class="tsd-signatures tsd-kind-type-literal"><li class="tsd-signature tsd-kind-icon"><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol">></span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol">></span></h4></li></ul></li></ul></li></ul><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol">></span></h4><div><p>A promise resolving when the lock is released.</p>
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</div></li></ul></section><section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class tsd-has-type-parameter"><a id="withWriteLock" class="tsd-anchor"></a><h3 class="tsd-anchor-link">with<wbr/>Write<wbr/>Lock<a href="#withWriteLock" aria-label="Permalink" class="tsd-anchor-icon"><svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-link" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M10 14a3.5 3.5 0 0 0 5 0l4 -4a3.5 3.5 0 0 0 -5 -5l-.5 .5"></path><path d="M14 10a3.5 3.5 0 0 0 -5 0l-4 4a3.5 3.5 0 0 0 5 5l.5 -.5"></path></svg></a></h3><ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class tsd-has-type-parameter"><li class="tsd-signature tsd-kind-icon">with<wbr/>Write<wbr/>Lock<span class="tsd-signature-symbol"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol">></span><span class="tsd-signature-symbol">(</span>identifier<span class="tsd-signature-symbol">: </span><a href="../interfaces/ResourceIdentifier.html" class="tsd-signature-type" data-tsd-kind="Interface">ResourceIdentifier</a>, whileLocked<span class="tsd-signature-symbol">: </span><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> => </span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><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"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol">></span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><aside class="tsd-sources"><p>Implementation of <a href="../interfaces/ReadWriteLocker.html">ReadWriteLocker</a>.<a href="../interfaces/ReadWriteLocker.html#withWriteLock">withWriteLock</a></p><ul><li>Defined in <a href="https://github.com/CommunitySolidServer/CommunitySolidServer/blob/f0f900e/src/util/locking/RedisLocker.ts#L141">src/util/locking/RedisLocker.ts:141</a></li></ul></aside><div class="tsd-comment tsd-typography"><div class="lead">
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<p>Run the given function while the resource is locked.
|
|
The lock will be released when the (async) input function resolves.
|
|
This function should be used for operations that could modify the resource.</p>
|
|
</div></div><h4 class="tsd-type-parameters-title">Type parameters</h4><ul class="tsd-type-parameters"><li><h4>T</h4></li></ul><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameters"><li><h5>identifier: <a href="../interfaces/ResourceIdentifier.html" class="tsd-signature-type" data-tsd-kind="Interface">ResourceIdentifier</a></h5></li><li><h5>whileLocked: <span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> => </span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol">></span></h5><ul class="tsd-parameters"><li class="tsd-parameter-signature"><ul class="tsd-signatures tsd-kind-type-literal"><li class="tsd-signature tsd-kind-icon"><span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol">></span></li></ul><ul class="tsd-descriptions"><li class="tsd-description"><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol">></span></h4></li></ul></li></ul></li></ul><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type" data-tsd-kind="Type parameter">T</span><span class="tsd-signature-symbol">></span></h4><div><p>A promise resolving when the lock is released.</p>
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