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<!DOCTYPE html><html class="default" lang="en" data-base=".."><head><meta charset="utf-8"/><meta http-equiv="x-ua-compatible" content="IE=edge"/><title>MetricReaderOptions | OpenTelemetry SDK</title><meta name="description" content="Documentation for OpenTelemetry SDK"/><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 defer src="../assets/main.js"></script><script async src="../assets/icons.js" id="tsd-icons-script"></script><script async src="../assets/search.js" id="tsd-search-script"></script><script async src="../assets/navigation.js" id="tsd-nav-script"></script><script async src="../assets/hierarchy.js" id="tsd-hierarchy-script"></script></head><body><script>document.documentElement.dataset.theme = localStorage.getItem("tsd-theme") || "os";document.body.style.display="none";setTimeout(() => app?app.showPage():document.body.style.removeProperty("display"),500)</script><header class="tsd-page-toolbar"><div class="tsd-toolbar-contents container"><div class="table-cell" id="tsd-search"><div class="field"><label for="tsd-search-field" class="tsd-widget tsd-toolbar-icon search no-caption"><svg width="16" height="16" viewBox="0 0 16 16" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-search"></use></svg></label><input type="text" id="tsd-search-field" aria-label="Search"/></div><div class="field"><div id="tsd-toolbar-links"></div></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">OpenTelemetry SDK</a></div><div class="table-cell" id="tsd-widgets"><a href="#" class="tsd-widget tsd-toolbar-icon menu no-caption" data-toggle="menu" aria-label="Menu"><svg width="16" height="16" viewBox="0 0 16 16" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-menu"></use></svg></a></div></div></header><div class="container container-main"><div class="col-content"><div class="tsd-page-title"><ul class="tsd-breadcrumb"><li><a href="../index.html">OpenTelemetry SDK</a></li><li><a href="../modules/_opentelemetry_sdk-node.html">@opentelemetry/sdk-node</a></li><li><a href="../modules/_opentelemetry_sdk-node.metrics.html">metrics</a></li><li><a href="_opentelemetry_sdk-node.metrics.MetricReaderOptions.html">MetricReaderOptions</a></li></ul><h1>Interface MetricReaderOptions</h1></div><div class="tsd-signature"><span class="tsd-signature-keyword">interface</span> <span class="tsd-kind-interface">MetricReaderOptions</span> <span class="tsd-signature-symbol">{</span><br/> <a class="tsd-kind-property" href="_opentelemetry_sdk-node.metrics.MetricReaderOptions.html#aggregationselector">aggregationSelector</a><span class="tsd-signature-symbol">?:</span> <a href="../modules/_opentelemetry_sdk-node.metrics.html" class="tsd-signature-type tsd-kind-namespace">metrics</a><span class="tsd-signature-symbol">.</span><a href="../types/_opentelemetry_sdk-node.metrics.AggregationSelector.html" class="tsd-signature-type tsd-kind-type-alias">AggregationSelector</a><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="_opentelemetry_sdk-node.metrics.MetricReaderOptions.html#aggregationtemporalityselector">aggregationTemporalitySelector</a><span class="tsd-signature-symbol">?:</span> <a href="../modules/_opentelemetry_sdk-node.metrics.html" class="tsd-signature-type tsd-kind-namespace">metrics</a><span class="tsd-signature-symbol">.</span><a href="../types/_opentelemetry_sdk-node.metrics.AggregationTemporalitySelector.html" class="tsd-signature-type tsd-kind-type-alias">AggregationTemporalitySelector</a><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="_opentelemetry_sdk-node.metrics.MetricReaderOptions.html#cardinalityselector">cardinalitySelector</a><span class="tsd-signature-symbol">?:</span> <span class="tsd-signature-type">CardinalitySelector</span><span class="tsd-signature-symbol">;</span><br/> <a class="tsd-kind-property" href="_opentelemetry_sdk-node.metrics.MetricReaderOptions.html#metricproducers">metricProducers</a><span class="tsd-signature-symbol">?:</span> <a href="../modules/_opentelemetry_sdk-node.metrics.html" class="tsd-signature-type tsd-kind-namespace">metrics</a><span class="tsd-signature-symbol">.</span><a href="_opentelemetry_sdk-node.metrics.MetricProducer.html" class="tsd-signature-type tsd-kind-interface">MetricProducer</a><span class="tsd-signature-symbol">[]</span><span class="tsd-signature-symbol">;</span><br/><span class="tsd-signature-symbol">}</span></div><aside class="tsd-sources"><ul><li>Defined in packages/sdk-metrics/build/src/export/MetricReader.d.ts:8</li></ul></aside><section class="tsd-panel-group tsd-index-group"><section class="tsd-panel tsd-index-panel"><details class="tsd-index-content tsd-accordion" open><summary class="tsd-accordion-summary tsd-index-summary"><h5 class="tsd-index-heading uppercase" role="button" aria-expanded="false" tabIndex="0"><svg width="16" height="16" viewBox="0 0 16 16" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-chevronSmall"></use></svg> Index</h5></summary><div class="tsd-accordion-details"><section class="tsd-index-section"><h3 class="tsd-index-heading">Properties</h3><div class="tsd-index-list"><a href="_opentelemetry_sdk-node.metrics.MetricReaderOptions.html#aggregationselector" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>aggregation<wbr/>Selector?</span></a>
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<a href="_opentelemetry_sdk-node.metrics.MetricReaderOptions.html#aggregationtemporalityselector" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>aggregation<wbr/>Temporality<wbr/>Selector?</span></a>
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<a href="_opentelemetry_sdk-node.metrics.MetricReaderOptions.html#cardinalityselector" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>cardinality<wbr/>Selector?</span></a>
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<a href="_opentelemetry_sdk-node.metrics.MetricReaderOptions.html#metricproducers" class="tsd-index-link"><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>metric<wbr/>Producers?</span></a>
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</div></section></div></details></section></section><details class="tsd-panel-group tsd-member-group tsd-accordion" open><summary class="tsd-accordion-summary" data-key="section-Properties"><h2><svg width="20" height="20" viewBox="0 0 24 24" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-chevronDown"></use></svg> Properties</h2></summary><section><section class="tsd-panel tsd-member"><a id="aggregationselector" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><code class="tsd-tag">Optional</code><span>aggregation<wbr/>Selector</span><a href="#aggregationselector" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">aggregationSelector</span><span class="tsd-signature-symbol">?:</span> <a href="../modules/_opentelemetry_sdk-node.metrics.html" class="tsd-signature-type tsd-kind-namespace">metrics</a><span class="tsd-signature-symbol">.</span><a href="../types/_opentelemetry_sdk-node.metrics.AggregationSelector.html" class="tsd-signature-type tsd-kind-type-alias">AggregationSelector</a></div><div class="tsd-comment tsd-typography"><p>Aggregation selector based on metric instrument types. If no views are
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configured for a metric instrument, a per-metric-reader aggregation is
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selected with this selector.</p>
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<p> NOTE: the provided function MUST be pure</div><div class="tsd-comment tsd-typography"></div><aside class="tsd-sources"><ul><li>Defined in packages/sdk-metrics/build/src/export/MetricReader.d.ts:16</li></ul></aside></section><section class="tsd-panel tsd-member"><a id="aggregationtemporalityselector" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><code class="tsd-tag">Optional</code><span>aggregation<wbr/>Temporality<wbr/>Selector</span><a href="#aggregationtemporalityselector" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">aggregationTemporalitySelector</span><span class="tsd-signature-symbol">?:</span> <a href="../modules/_opentelemetry_sdk-node.metrics.html" class="tsd-signature-type tsd-kind-namespace">metrics</a><span class="tsd-signature-symbol">.</span><a href="../types/_opentelemetry_sdk-node.metrics.AggregationTemporalitySelector.html" class="tsd-signature-type tsd-kind-type-alias">AggregationTemporalitySelector</a></div><div class="tsd-comment tsd-typography"><p>Aggregation temporality selector based on metric instrument types. If
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not configured, cumulative is used for all instruments.</p>
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<p> NOTE: the provided function MUST be pure</div><div class="tsd-comment tsd-typography"></div><aside class="tsd-sources"><ul><li>Defined in packages/sdk-metrics/build/src/export/MetricReader.d.ts:23</li></ul></aside></section><section class="tsd-panel tsd-member"><a id="cardinalityselector" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><code class="tsd-tag">Optional</code><span>cardinality<wbr/>Selector</span><a href="#cardinalityselector" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">cardinalitySelector</span><span class="tsd-signature-symbol">?:</span> <span class="tsd-signature-type">CardinalitySelector</span></div><div class="tsd-comment tsd-typography"><p>Cardinality selector based on metric instrument types. If not configured,
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a default value is used.</p>
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<p> NOTE: the provided function MUST be pure</div><div class="tsd-comment tsd-typography"></div><aside class="tsd-sources"><ul><li>Defined in packages/sdk-metrics/build/src/export/MetricReader.d.ts:30</li></ul></aside></section><section class="tsd-panel tsd-member"><a id="metricproducers" class="tsd-anchor"></a><h3 class="tsd-anchor-link"><code class="tsd-tag">Optional</code> <code class="tsd-tag">Experimental</code><span>metric<wbr/>Producers</span><a href="#metricproducers" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h3><div class="tsd-signature"><span class="tsd-kind-property">metricProducers</span><span class="tsd-signature-symbol">?:</span> <a href="../modules/_opentelemetry_sdk-node.metrics.html" class="tsd-signature-type tsd-kind-namespace">metrics</a><span class="tsd-signature-symbol">.</span><a href="_opentelemetry_sdk-node.metrics.MetricProducer.html" class="tsd-signature-type tsd-kind-interface">MetricProducer</a><span class="tsd-signature-symbol">[]</span></div><div class="tsd-comment tsd-typography"><p><strong>Note, this option is experimental</strong>. Additional MetricProducers to use as a source of
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aggregated metric data in addition to the SDK's metric data. The resource returned by
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these MetricProducers is ignored; the SDK's resource will be used instead.</p>
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</div><div class="tsd-comment tsd-typography"></div><aside class="tsd-sources"><ul><li>Defined in packages/sdk-metrics/build/src/export/MetricReader.d.ts:37</li></ul></aside></section></section></details></div><div class="col-sidebar"><div class="page-menu"><div class="tsd-navigation settings"><details class="tsd-accordion"><summary class="tsd-accordion-summary"><h3><svg width="20" height="20" viewBox="0 0 24 24" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-chevronDown"></use></svg>Settings</h3></summary><div class="tsd-accordion-details"><div class="tsd-filter-visibility"><span class="settings-label">Member Visibility</span><ul id="tsd-filter-options"><li class="tsd-filter-item"><label class="tsd-filter-input"><input type="checkbox" id="tsd-filter-protected" name="protected"/><svg width="32" height="32" viewBox="0 0 32 32" aria-hidden="true"><rect class="tsd-checkbox-background" width="30" height="30" x="1" y="1" rx="6" fill="none"></rect><path class="tsd-checkbox-checkmark" d="M8.35422 16.8214L13.2143 21.75L24.6458 10.25" stroke="none" stroke-width="3.5" stroke-linejoin="round" fill="none"></path></svg><span>Protected</span></label></li><li class="tsd-filter-item"><label class="tsd-filter-input"><input type="checkbox" id="tsd-filter-inherited" name="inherited" checked/><svg width="32" height="32" viewBox="0 0 32 32" aria-hidden="true"><rect class="tsd-checkbox-background" width="30" height="30" x="1" y="1" rx="6" fill="none"></rect><path class="tsd-checkbox-checkmark" d="M8.35422 16.8214L13.2143 21.75L24.6458 10.25" stroke="none" stroke-width="3.5" stroke-linejoin="round" fill="none"></path></svg><span>Inherited</span></label></li><li class="tsd-filter-item"><label class="tsd-filter-input"><input type="checkbox" id="tsd-filter-external" name="external"/><svg width="32" height="32" viewBox="0 0 32 32" aria-hidden="true"><rect class="tsd-checkbox-background" width="30" height="30" x="1" y="1" rx="6" fill="none"></rect><path class="tsd-checkbox-checkmark" d="M8.35422 16.8214L13.2143 21.75L24.6458 10.25" stroke="none" stroke-width="3.5" stroke-linejoin="round" fill="none"></path></svg><span>External</span></label></li></ul></div><div class="tsd-theme-toggle"><label class="settings-label" for="tsd-theme">Theme</label><select id="tsd-theme"><option value="os">OS</option><option value="light">Light</option><option value="dark">Dark</option></select></div></div></details></div><details open class="tsd-accordion tsd-page-navigation"><summary class="tsd-accordion-summary"><h3><svg width="20" height="20" viewBox="0 0 24 24" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-chevronDown"></use></svg>On This Page</h3></summary><div class="tsd-accordion-details"><details open class="tsd-accordion tsd-page-navigation-section"><summary class="tsd-accordion-summary" data-key="section-Properties"><svg width="20" height="20" viewBox="0 0 24 24" fill="none" aria-hidden="true"><use href="../assets/icons.svg#icon-chevronDown"></use></svg>Properties</summary><div><a href="#aggregationselector" class=""><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>aggregation<wbr/>Selector</span></a><a href="#aggregationtemporalityselector" class=""><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>aggregation<wbr/>Temporality<wbr/>Selector</span></a><a href="#cardinalityselector" class=""><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>cardinality<wbr/>Selector</span></a><a href="#metricproducers" class=""><svg class="tsd-kind-icon" viewBox="0 0 24 24" aria-label="Property"><use href="../assets/icons.svg#icon-1024"></use></svg><span>metric<wbr/>Producers</span></a></div></details></div></details></div><div class="site-menu"><nav class="tsd-navigation"><a href="../index.html">OpenTelemetry SDK</a><ul class="tsd-small-nested-navigation" id="tsd-nav-container"><li>Loading...</li></ul></nav></div></div></div><footer><p class="tsd-generator">Generated using <a href="https://typedoc.org/" target="_blank">TypeDoc</a></p></footer><div class="overlay"></div></body></html>
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