Go Patterns
A curated collection of idiomatic design & application patterns for Go language.
Creational Patterns
| 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 |
✔ |
Structural Patterns
| 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 |
✔ |
Behavioral Patterns
| 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 |
✘ |
Synchronization Patterns
| 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 |
✔ |
Concurrency Patterns
| 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 syncronously to the associated request handlers |
✘ |
| Parallelism |
Completes large number of independent tasks |
✔ |
| Producer Consumer |
Separates tasks from task executions |
✘ |
Messaging Patterns
| 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 |
✘ |
Stability Patterns
| 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 |
✘ |
Profiling Patterns
| Pattern |
Description |
Status |
| Timing Functions |
Wraps a function and logs the execution |
✔ |
Idioms
| Pattern |
Description |
Status |
| Functional Options |
Allows creating clean APIs with sane defaults and idiomatic overrides |
✔ |
Anti-Patterns
| Pattern |
Description |
Status |
| Cascading Failures |
A failure in a system of interconnected parts in which the failure of a part causes a domino effect |
✘ |
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