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:: Architecture & system design

Multi-app workflows

다중 앱 워크플로

One durable workflow dispatches activities to services with different app IDs.

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html
<div class="scene"><div class="title">ONE HISTORY · THREE APP IDS</div><div class="timeline"><div class="stem"></div><div class="step" id="app1">APP 1<br>CPU</div><div class="step" id="app2">APP 2<br>GPU</div><div class="step" id="app3">APP 3<br>DEPLOY</div></div><div class="history">PARENT HISTORY <span id="history">1 / 3 complete</span></div></div>
css
.scene{width:min(94vw,760px);height:min(86vh,320px);padding:clamp(10px,2.5vmin,18px);border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--fg);font:500 clamp(11px,1.3vw,16px)/1.25 "Pretendard Variable",Pretendard,-apple-system,sans-serif;display:flex;flex-direction:column;gap:clamp(7px,1.6vmin,12px);overflow:hidden}.scene *{box-sizing:border-box}.title{font-weight:750;color:var(--accent)}.muted{color:var(--muted)}.mono{font-family:ui-monospace,monospace}.row{display:flex;align-items:center;justify-content:center;gap:clamp(5px,1.4vmin,12px);flex:1;min-height:0}.tile{border:1px solid var(--line);border-radius:8px;background:var(--bg);padding:clamp(6px,1.6vmin,12px);text-align:center;min-width:0}.on{border-color:var(--accent)!important;background:color-mix(in srgb,var(--accent) 12%,var(--surface))!important}.pulse{animation:pulse 1.6s infinite alternate}@keyframes pulse{to{border-color:var(--accent);transform:translateY(-3px)}}.timeline{display:flex;align-items:center;justify-content:space-around;gap:5px;position:relative;flex:1}.timeline .stem{position:absolute;left:9%;right:9%;height:3px;background:var(--line)}.step{position:relative;z-index:1;border:2px solid var(--line);background:var(--bg);border-radius:8px;padding:7px 3px;text-align:center;min-width:25%}.step.active{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,var(--surface))}.history{border:1px solid var(--line);border-radius:7px;padding:7px;display:flex;justify-content:space-between;gap:5px}.history span{color:var(--accent)}
js
let n=0;function tick(){['app1','app2','app3'].forEach((id,i)=>document.getElementById(id).classList.toggle('active',i<=n%3));document.getElementById('history').textContent=(n%3+1)+' / 3 complete';n++}tick();setInterval(tick,900);document.querySelector('.scene').addEventListener('pointerdown',tick)
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Durable execution지속 실행

Persist long-running progress so execution can resume after interruption.

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Workflow versioning장기 워크플로 버저닝

Existing runs keep their path while new runs follow a revised definition.

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Dynamic tenant workflows테넌트별 동적 워크플로

Load tenant-supplied workflow code on demand and resume with the right tenant later.

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Sharded workflow control plane분산 워크플로 제어면

Distribute coordination across workflow shards to scale concurrent executions.

In Dapr multi-app workflows, a parent names the target app ID for an activity or child workflow. Each app runs its own work and returns a result; the parent app stores the final history. Runtime support began in 1.16 and .NET SDK support in 1.17.

The demo dispatches CPU, GPU, and deployment stages. Participating apps need the same namespace and workflow state store, plus registered targets and suitable access policy.

When to use

Use it when stages owned by different apps or compute environments need one recoverable flow.

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