--- title: Using single execution calls with workflows | daily.dev description: This post discusses the challenge of ensuring requests are processed exactly once in distributed systems like Workflows. It provides examples and solutions for... canonical: https://daily.dev/posts/using-single-execution-calls-with-workflows-btf9tdlzv twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Using single execution calls with workflows | daily.dev og:description: This post discusses the challenge of ensuring requests are processed exactly once in distributed systems like Workflows. It provides examples and solutions for... og:url: https://daily.dev/posts/using-single-execution-calls-with-workflows-btf9tdlzv og:image: https://api.daily.dev/og/posts/BTF9tDlZV.png og:image:alt: Using single execution calls with workflows og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Using single execution calls with workflows **[Google Cloud](https://daily.dev/sources/gcp)** · 1 min read · 0 upvotes · 0 comments ## Summary This post discusses the challenge of ensuring requests are processed exactly once in distributed systems like Workflows. It provides examples and solutions for invoking Workflows and Cloud Functions exactly once, and explores how to make requests exactly once with HTTP callbacks, Pub/Sub messages, and Cloud Tasks. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#gcp-cloud-functions](https://daily.dev/tags/gcp-cloud-functions) [View this post on daily.dev](https://daily.dev/posts/using-single-execution-calls-with-workflows-btf9tdlzv) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Using single execution calls with workflows","url":"https://daily.dev/posts/using-single-execution-calls-with-workflows-btf9tdlzv","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/using-single-execution-calls-with-workflows-btf9tdlzv"},"datePublished":"2024-05-03T16:07:40.782Z","dateModified":"2024-05-09T08:39:06.345Z","description":"This post discusses the challenge of ensuring requests are processed exactly once in distributed systems like Workflows. It provides examples and solutions for...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f3403a683b60a2e8f3af1bcd9a9dc773?_a=AQAEuiZ","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f3403a683b60a2e8f3af1bcd9a9dc773?_a=AQAEuiZ","isAccessibleForFree":true,"articleSection":"Google Cloud","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Google Cloud","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/gcp","url":"https://daily.dev/sources/gcp"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/using-single-execution-calls-with-workflows-btf9tdlzv","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"gcp-cloud-functions","timeRequired":"PT1M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Google Cloud","item":"https://daily.dev/sources/gcp"},{"@type":"ListItem","position":3,"name":"Using single execution calls with workflows"}]} ```