Tag: architecture
Concurrency vs Parallelism
Concurrency is about dealing with multiple tasks at once (structuring); parallelism is actually executing multiple tasks simultaneously (hardware). You can have one without the other.
2mo ago
concurrency beginner
CQRS Pattern
PHP 7.0+
Command Query Responsibility Segregation — separating the write model (commands that change state) from the read model (queries that return data), allowing each to be optimised independently.
2mo ago
messaging advanced
Cloud-Native Patterns
PHP 5.0+
Stateless services, externalised config, health checks, graceful shutdown, and immutable infrastructure — the 12-Factor App extended for containers.
3mo ago
cloud intermediate
Conformist Pattern
A context mapping relationship where the downstream team adopts the upstream team's model wholesale — accepting the upstream language rather than building a translation layer.
3mo ago
architecture advanced
CAP Theorem
PHP 5.0+ A distributed system can guarantee only two of three simultaneously: Consistency, Availability, Partition Tolerance — driving fundamental design trade-offs.
3mo ago
architecture advanced
Choreography vs Orchestration
Two patterns for coordinating microservices: orchestration uses a central coordinator that calls each service; choreography uses events that services react to independently.
3mo ago
architecture advanced
Circuit Breaker Pattern
PHP 5.0+ Wrapping calls to a flaky downstream service with a state machine that opens (stops calls) after threshold failures, preventing cascade failures.
3mo ago
architecture intermediate
Clean Architecture
PHP 5.0+ Robert C. Martin's layered architecture that places business rules at the centre, independent of frameworks, UI, and databases.
3mo ago
architecture advanced
Cohesion
The degree to which elements within a module belong together; high cohesion means a class does one thing and does it well.
3mo ago
quality intermediate
Command Query Separation (CQS)
Methods should either return a value (query) or change state (command), but never both.
3mo ago
quality intermediate
Context Mapping
A DDD strategic pattern that maps the relationships between bounded contexts — defining integration patterns like Anti-Corruption Layer, Shared Kernel, and Customer-Supplier.
3mo ago
architecture advanced
Conway's Law
"Organisations design systems that mirror their own communication structure" — team topology shapes architecture whether you plan it or not.
3mo ago
general intermediate
Coupling
The degree to which one module depends on another; high coupling makes changes expensive and testing difficult.
3mo ago
quality intermediate
CQRS (Command Query Responsibility Segregation)
PHP 7.0+ Separates the model for reading data (queries) from the model for writing data (commands), enabling independent optimisation of each.
3mo ago
architecture advanced