Integration error handling & retry pattern template

Components in this integration diagram

• Message received
• Seen this message ID?
• Discard duplicate
• Validate schema
• Valid?
• Invalid message store
• Notify sender
• Transform & call target
• Target responded?
• Record processed ID
• Done
• Retries left?
• Backoff 1s, 5s, 30s
• Dead letter queue
• Alert support
• Fix & replay from DLQ

How to use this integration diagram template

1. Click Open in the editor. The integration diagram opens on a new page in FlowDiagram — nothing is uploaded and there is no sign-up.
2. Rename, add or delete shapes and drag them where you want; connectors stay attached as things move.
3. Drop in vendor logos from the library — 1,160 of them, including every AWS, Azure and Google Cloud service icon — or restyle it with the colour and theme controls.
4. Prefer text? Edit the Mermaid source below and paste it in through ☰ → Import diagram (see the Mermaid editor); it imports as an editable diagram.
5. Export to PNG, SVG or PDF, or press Ctrl+L for a link that carries the whole diagram.

Mermaid source

The whole template is the text below. Paste it into FlowDiagram, keep it in Git next to the code it describes, or hand it to an AI assistant to extend.

flowchart TD
  A((Message received)) --> B{Seen this message ID?}
  B -->|Yes| C((Discard duplicate))
  B -->|No| D[Validate schema]
  D --> E{Valid?}
  E -->|No| F[(Invalid message store)]
  F --> G[Notify sender]
  E -->|Yes| H[Transform & call target]
  H --> I{Target responded?}
  I -->|2xx| J[(Record processed ID)]
  J --> K((Done))
  I -->|5xx or timeout| L{Retries left?}
  L -->|Yes| M[Backoff 1s, 5s, 30s]
  M --> H
  L -->|No| N[(Dead letter queue)]
  I -->|4xx| N
  N --> O[Alert support]
  O --> P[Fix & replay from DLQ]
  P --> H

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