Sequence: Critical Block

Critical section that must complete atomically.

sequence-critical-block.mmd

sequenceDiagram
  participant A as App
  participant DB as Database
  A->>DB: BEGIN
  critical Transaction
    A->>DB: UPDATE accounts
    A->>DB: INSERT log
  end
  A->>DB: COMMIT

Output

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More Sequence diagram examples

Sequence: Basic Messages

Sequence: Participant Aliases

Sequence: Actor Stick Figures

Sequence: Arrow Types

Sequence: Activation Boxes

Sequence: Self-Messages