1.6 KiB
1.6 KiB
Chain of Responsibility Design Pattern — Java Example
Pattern: Behavioral → Chain of Responsibility Article: https://ankurm.com/chain-of-responsibility-design-pattern-java/
What this example shows
A support-ticket routing system: four handlers (Level1Support, Level2Support, Level3Support, CriticalIncidentTeam) are chained together via SupportHandler.setNext(). Each handler checks canHandle() for the ticket's priority — if it can't handle the ticket, it logs that it's passing the ticket up and delegates to the next handler in the chain. The sender (Main) only ever talks to the first handler; it has no idea which handler will ultimately resolve each ticket.
How to run
javac chain-of-responsibility/*.java -d out/chain
java -cp out/chain chain.Main
Requires Java 25.
Post Section ↔ File Mapping
| Post Section | File(s) |
|---|---|
| The Problem: Rigid Routing Logic | illustrative only — not part of this repository's runnable example |
| Implementation: Support Ticket Escalation — base handler | SupportHandler.java |
| Implementation: Support Ticket Escalation — the ticket | SupportTicket.java |
| Each concrete handler checks only its own responsibility — Level 1 & 2 | Level1Support.java, Level2Support.java |
| Level3Support and CriticalIncidentTeam follow exactly the same shape | Level3Support.java, CriticalIncidentTeam.java |
| The chain is assembled in one place | Main.java |
Article: https://ankurm.com/chain-of-responsibility-design-pattern-java/ All patterns: https://ankurm.com/design-patterns-java/