A curated collection of idiomatic design & application patterns for Go language.
Pattern |
Description |
Status |
Abstract Factory |
Provides an interface for creating families of releated objects |
✔ |
Builder |
Builds a complex object using simple objects |
✔ |
Factory Method |
Defers instantiation of an object to a specialized function for creating instances |
✔ |
Object Pool |
Instantiates and maintains a group of objects instances of the same type |
✔ |
Singleton |
Restricts instantiation of a type to one object |
✔ |
Pattern |
Description |
Status |
Bridge |
Decouples an interface from its implementation so that the two can vary independently |
✔ |
Composite |
Encapsulates and provides access to a number of different objects |
✔ |
Decorator |
Adds behavior to an object, statically or dynamically |
✔ |
Facade |
Uses one type as an API to a number of others |
✔ |
Flyweight |
Reuses existing instances of objects with similar/identical state to minimize resource usage |
✔ |
Proxy |
Provides a surrogate for an object to control it's actions |
✔ |
Adapter |
Provides a surrogate for an object to control it's actions |
✔ |
Pattern |
Description |
Status |
Chain of Responsibility |
Avoids coupling a sender to receiver by giving more than object a chance to handle the request |
✔ |
Command |
Bundles a command and arguments to call later |
✔ |
Mediator |
Connects objects and acts as a proxy |
✔ |
Memento |
Generate an opaque token that can be used to go back to a previous state |
✔ |
Observer |
Provide a callback for notification of events/changes to data |
✔ |
Registry |
Keep track of all subclasses of a given class |
✔ |
State |
Encapsulates varying behavior for the same object based on its internal state |
✔ |
Strategy |
Enables an algorithm's behavior to be selected at runtime |
✔ |
Template |
Defines a skeleton class which defers some methods to subclasses |
✔ |
Visitor |
Separates an algorithm from an object on which it operates |
✔ |
Interpreter |
interpret your own language or composed commands |
✔ |
Pattern |
Description |
Status |
Condition Variable |
Provides a mechanism for threads to temporarily give up access in order to wait for some condition |
✘ |
Lock/Mutex |
Enforces mutual exclusion limit on a resource to gain exclusive access |
✘ |
Monitor |
Combination of mutex and condition variable patterns |
✘ |
Read-Write Lock |
Allows parallel read access, but only exclusive access on write operations to a resource |
✔ |
Semaphore |
Allows controlling access to a common resource |
✔ |
Pattern |
Description |
Status |
N-Barrier |
Prevents a process from proceeding until all N processes reach to the barrier |
✔ |
Bounded Parallelism |
Completes large number of independent tasks with resource limits |
✔ |
Broadcast |
Transfers a message to all recipients simultaneously |
✘ |
Coroutines |
Subroutines that allow suspending and resuming execution at certain locations |
✘ |
Generators |
Yields a sequence of values one at a time |
✔ |
Reactor |
Demultiplexes service requests delivered concurrently to a service handler and dispatches them synchronously to the associated request handlers |
✘ |
Parallelism |
Completes large number of independent tasks |
✔ |
Producer Consumer |
Separates tasks from task executions |
✔ |
Pattern |
Description |
Status |
Fan-In |
Funnels tasks to a work sink (e.g. server) |
✔ |
Fan-Out |
Distributes tasks among workers (e.g. producer) |
✔ |
Futures & Promises |
Acts as a place-holder of a result that is initially unknown for synchronization purposes |
✔ |
Publish/Subscribe |
Passes information to a collection of recipients who subscribed to a topic |
✔ |
Push & Pull |
Distributes messages to multiple workers, arranged in a pipeline |
✘ |
Pattern |
Description |
Status |
Bulkheads |
Enforces a principle of failure containment (i.e. prevents cascading failures) |
✘ |
Circuit-Breaker |
Stops the flow of the requests when requests are likely to fail |
✔ |
Deadline |
Allows clients to stop waiting for a response once the probability of response becomes low (e.g. after waiting 10 seconds for a page refresh) |
✔ |
Fail-Fast |
Checks the availability of required resources at the start of a request and fails if the requirements are not satisfied |
✘ |
Handshaking |
Asks a component if it can take any more load, if it can't, the request is declined |
✘ |
Steady-State |
For every service that accumulates a resource, some other service must recycle that resource |
✘ |
Pattern |
Description |
Status |
Timing Functions |
Wraps a function and logs the execution |
✔ |
Pattern |
Description |
Status |
Functional Options |
Allows creating clean APIs with sane defaults and idiomatic overrides |
✔ |
Pattern |
Description |
Status |
go-pattern-examples