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Dev.to
6/25/2026
A Practical Guide to Decomposing Legacy Java Monoliths

A Practical Guide to Decomposing Legacy Java Monoliths

Short summary

A comprehensive guide to decomposing legacy Java monoliths into microservices. The article covers identifying service boundaries using domain-driven design principles, managing data separation, and using the strangler fig pattern for gradual migration. Success depends on clear business goals, dependency analysis, and proper data ownership.

  • •Identify service boundaries using domain-driven design and business capability mapping
  • •Manage data ownership and API communication to avoid creating a distributed monolith
  • •Apply the strangler fig pattern for gradual, safe migration from monolithic to microservice architecture

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