https://codepros.org/tags/concurrency/Recent contentHugo 0.147.1enSat, 18 Apr 2026 12:58:00 +0000Concurrencyhttps://codepros.org/blog/beginning-concurrency-patterns/Thu, 30 Dec 2021 06:00:00 -0500https://codepros.org/blog/beginning-concurrency-patterns/triangle-gogointermediateparallel-programmingconcurrencyconcurrent-designbest-practices<p>In this post I will cover some best practices for building concurrent applications in Go using basic concurrency patterns and native primitives. The patterns themselves are applicable to any language, but for these examples we will use Go.</p> <p>Clone the repository for this post to follow along</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="ln">1</span><span class="cl">git clone https://github.com/benjivesterby/may2021-triangle-meetup.git </span></span></code></pre></div> <h3 id="pipeline-pattern" class="position-relative"> Pipeline Pattern <a class="h-anchor ms-2 text-decoration-none link-secondary" href="#pipeline-pattern" aria-label="Link to this section: Pipeline Pattern"> <i class="fa-sharp-duotone fa-solid fa-link" aria-hidden="true"></i> </a> <a class="h-top ms-1 text-decoration-none link-secondary" href="#top" aria-label="Back to top"> <i class="fa-sharp-duotone fa-regular fa-arrow-up" aria-hidden="true"></i> </a> <button type="button" class="h-share ms-1 btn btn-link p-0 text-decoration-none link-secondary" data-share-target="pipeline-pattern" aria-haspopup="dialog" aria-label="Share link: Pipeline Pattern"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true"></i> <span class="visually-hidden">Share link</span> </button> </h3><div id="headingShareModal" class="heading-share-modal" role="dialog" aria-modal="true" aria-labelledby="headingShareTitle" hidden> <div class="hsm-dialog border rounded shadow-sm p-3" role="document"> <div class="d-flex justify-content-between align-items-center border-bottom pb-2"> <h2 id="headingShareTitle" class="h6 mb-0">Share this section</h2> <button type="button" class="hsm-close btn btn-sm btn-outline-secondary" aria-label="Close">×</button> </div> <div class="hsm-body mt-3"> <div class="input-group mb-3 hsm-url-group"> <input id="headingShareInput" type="text" class="form-control" readonly aria-readonly="true" /> <button class="btn btn-primary hsm-copy" type="button" aria-label="Copy" title="Copy"> <i class="fa-duotone fa-clipboard" aria-hidden="true"></i> </button> </div> <div class="small mb-2 fw-semibold">Share link:</div> <ul class="list-inline mb-0 hsm-share-links"> <li class="list-inline-item mb-2"> <a id="share-twitter" class="btn btn-sm btn-outline-primary" target="_blank" rel="noopener noreferrer">Twitter Profile</a> </li> <li class="list-inline-item mb-2"> <a id="share-linkedin" class="btn btn-sm btn-outline-primary" target="_blank" rel="noopener noreferrer">LinkedIn Profile</a> </li> <li class="list-inline-item mb-2"> <a id="share-facebook" class="btn btn-sm btn-outline-primary" target="_blank" rel="noopener noreferrer">Facebook Profile</a> </li> </ul> </div> </div> </div> <style> .heading-share-modal { position: fixed; 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hydrate(id); if(!isOpen()){ modal.removeAttribute('hidden'); } requestAnimationFrame(()=>{ input.focus(); }); trapFocus(); } function closeModal(){ if(!isOpen()) return; modal.setAttribute('hidden',''); if(lastFocus && typeof lastFocus.focus==='function') lastFocus.focus(); } function copyCurrent(){ try{ navigator.clipboard.writeText(input.value).then(()=>feedback(true),()=>fallback()); } catch(e){ fallback(); } } function fallback(){ input.select(); try{ document.execCommand('copy'); feedback(true);}catch(e){ feedback(false);} } function feedback(ok){ if(!copyBtn) return; const icon=copyBtn.querySelector('i'); if(!icon) return; const prev=copyBtn.getAttribute('data-prev')||icon.className; if(!copyBtn.getAttribute('data-prev')) copyBtn.setAttribute('data-prev',prev); icon.className= ok ? 'fa-duotone fa-clipboard-check':'fa-duotone fa-circle-exclamation'; setTimeout(()=>{ icon.className=prev; },1800); } function handleShareClick(e){ e.preventDefault(); const btn=e.currentTarget; const id=btn.getAttribute('data-share-target'); if(id) openModal(id); } function bindShareButtons(){ document.querySelectorAll('.h-share').forEach(btn=>{ if(!btn.dataset.hShareBound){ btn.addEventListener('click', handleShareClick); btn.dataset.hShareBound='1'; } }); } bindShareButtons(); if(document.readyState==='loading'){ document.addEventListener('DOMContentLoaded', bindShareButtons); } else { requestAnimationFrame(bindShareButtons); } document.addEventListener('click', function(e){ const shareBtn=e.target.closest && e.target.closest('.h-share'); if(shareBtn && !shareBtn.dataset.hShareBound){ handleShareClick.call(shareBtn, e); } }, true); document.addEventListener('click', e=>{ if(e.target===modal) closeModal(); if(e.target.closest && e.target.closest('.hsm-close')){ e.preventDefault(); closeModal(); } if(copyBtn && (e.target===copyBtn || (e.target.closest && e.target.closest('.hsm-copy')))) { e.preventDefault(); copyCurrent(); } }); document.addEventListener('keydown', e=>{ if(e.key==='Escape' && isOpen()) closeModal(); }); function trapFocus(){ if(trapBound) return; trapBound=true; modal.addEventListener('keydown', f=>{ if(f.key==='Tab' && isOpen()){ const focusable=[...modal.querySelectorAll('a[href],button,input,textarea,select,[tabindex]:not([tabindex="-1"])')].filter(el=>!el.hasAttribute('disabled')); if(!focusable.length) return; const first=focusable[0]; const last=focusable[focusable.length-1]; if(f.shiftKey && document.activeElement===first){ f.preventDefault(); last.focus(); } else if(!f.shiftKey && document.activeElement===last){ f.preventDefault(); first.focus(); } } }); } if(closeBtn) closeBtn.addEventListener('click', e=>{ e.preventDefault(); closeModal(); }); })(); </script><p>A pipeline pattern<sup id="fnref:1"><a href="#fn:1" class="footnote-ref" role="doc-noteref">1</a></sup> <sup id="fnref:2"><a href="#fn:2" class="footnote-ref" role="doc-noteref">2</a></sup> consists of a number of stages that are connected by a series of channels. The first stage is the source of the data, the last stage is the sink of the data. A good example of this would be a data pipeline where the first step mines the data, the subsequent steps cleans the data, and the final step stores the sanitized data in a database.</p>https://codepros.org/blog/go-native-concurrency-primitives/Thu, 30 Dec 2021 06:00:00 -0500https://codepros.org/blog/go-native-concurrency-primitives/triangle-gogointermediateparallel-programmingconcurrencyconcurrent-designbest-practices<p><picture> <source type="image/webp" srcset="https://codepros.org/blog/go-native-concurrency-primitives/images/sospecial_hu_8338207a0fec45a5.webp 1x" sizes="(max-width: 768px) 100vw, 768px"> <img class="img-fluid float-end me-3 mb-3" src="https://codepros.org/blog/go-native-concurrency-primitives/images/sospecial_hu_6cee7c709e74391b.png" srcset="https://codepros.org/blog/go-native-concurrency-primitives/images/sospecial_hu_6cee7c709e74391b.png 1x" sizes="(max-width: 768px) 100vw, 768px" width="200" height="150" alt="A meme with the &amp;ldquo;overly attached girlfriend&amp;rdquo; image and text that reads &amp;ldquo;You are so special!&amp;rdquo;" loading="lazy" decoding="async" style="max-width: 200px" /> </picture></p> <p>The Go programming language was created with concurrency as a first class citizen. It is a language that allows you to write programs that are highly parallel with ease by abstracting away the details of parallelism behind concurrency primitives<sup id="fnref:1"><a href="#fn:1" class="footnote-ref" role="doc-noteref">1</a></sup> within the language.</p>https://codepros.org/blog/parallelism-vs-concurrency/Wed, 29 Dec 2021 06:00:00 -0500https://codepros.org/blog/parallelism-vs-concurrency/triangle-gogocomputing-basicsintermediateparallel-programmingconcurrencyconcurrent-design<p><picture> <source type="image/webp" srcset="https://codepros.org/blog/parallelism-vs-concurrency/images/captain_hu_44d84a42c125837a.webp 1x" sizes="(max-width: 768px) 100vw, 768px"> <img class="img-fluid float-end me-3 mb-3" src="https://codepros.org/blog/parallelism-vs-concurrency/images/captain_hu_2e2887d02def7b62.png" srcset="https://codepros.org/blog/parallelism-vs-concurrency/images/captain_hu_2e2887d02def7b62.png 1x" sizes="(max-width: 768px) 100vw, 768px" width="300" height="150" alt="A photo of Captain America choking himself out in Avengers Endgame" loading="lazy" decoding="async" style="max-width: 300px" /> </picture></p> <p>Parallelism in software is the execution of instructions simultaneously. Each programming language either implements their own libraries, or provide native support as part of the language, like Go. Parallelism allows software engineers to side-step the physical limitations of the hardware by executing tasks in parallel on multiple processors.<sup id="fnref:1"><a href="#fn:1" class="footnote-ref" role="doc-noteref">1</a></sup></p>