Go design patterns

Collection of design pattern implementation in Go

Creational patterns

Pattern	Description
Abstract Factory	Provide an interface for creating families of related or dependent objects without specifying their concrete classes.
Builder	Separate the construction of a complex object from its representation so that the same construction process can create different representations.
Factory Method	Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory method lets a class defer instantiation to subclasses.
Object Pool	Instantiates and maintains a group of objects instances of the same type.
Prototype	Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype.
Singleton	Ensure a class only has one instance, and provide a global point of access to it.

Structural patterns

Pattern	Description
Adapter	Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces.
Bridge	Decouple an abstraction from its implementation so that the two can cary independently.
Composite	Compose objects into tree structures to represent part-whole hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly.
Decorator	Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality.
Facade	Provide a unified interface to a set of interfaces in a subsystem. Faade defines a higher-level interface that makes the subsystem easier to use.
Flyweight	Use sharing to support large numbers of fine-grained objects efficiently.
Private Class Data	Protect class state by minimizing the visibility of its attributes (data).
Proxy	Provide a surrogate or placeholder for another object to control access to it.

Behavioral patterns

Pattern	Description
Chain of Responsibility	Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it.
Command	Encapsulate a request as an object, thereby letting you parameterize clients with different requests, queue or log requests, and support undoable operations.
Interpreter	Given a language, define a representation for its grammar along with an interpreter that uses the representation to interpret sentences in the language.
Iterator	Provide a way to access the elements of an aggregate object sequentially without exposing its underlying its representation.
Mediator	Define an object that encapsulates how a set of objevts interact. Mediator promotes loose coupling by keeping objevts from referring to each other explicitly, and it lets you vary their interaction independently.
Memento	Without violating encapsulation, capture and externalize an object's internal state so that the object can be restored to this state later.
Null Object	Encapsulate the absence of an object by providing a substitutable alternative that offers suitable default do nothing behavior.
Observer	Define a one-to-many dependency between objects so that when one objet changes state, all its dependents are notified and updated automatically.
State	Allow an object to alter its behavior when its internal state changes. The object will appear to change its class.
Strategy	Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from clients that use it.
Template	Define the skeleton of an algorithm in an operation, deferring some steps to subclasses. Template method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure.
Visitor	Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the classes of the elements on which it operates.

TODO

Synchronization Patterns

• Condition Variable
• Lock/Mutex
• Monitor
• Read-Write Lock
• Semaphore

Concurrency Patterns

• N-Barrier
• Bounded Parallelism
• Broadcast
• Coroutines
• Generators
• Reactor
• Parallelism
• Producer Consumer

Messaging Patterns

• Fan-In
• Fan-Out
• Futures & Promises
• Publish/Subscribe
• Push & Pull

Stability Patterns

• Bulkheads
• Circuit-Breaker
• Deadline
• Fall-Fast
• Handshaking
• Steady-State

Profiling Patterns

• Timing Functions

Idioms

• Functional Options

Anti-Patterns

• Cascading Failures

References

• Design Patterns: Elements Reusable Object Book
• Sourcemaking
• Tmrts Go Patterns