Systems
Saturday, February 20, 2016

Mongo University Example

A working answer to a question of the mongo university
Saturday, February 20, 2016

Ninject

Ninject is a third party implementation of service oriented dependency injection using containers
Saturday, February 20, 2016

Implementing Existing Interfaces

Code to show how to implement an interface with explanation
Saturday, February 20, 2016

Hashtable Explanation Code

How to use
Monday, February 29, 2016

Cache-aside Pattern

Load data on demand into a cache from a data store. This pattern can improve performance and also helps to maintain consistency between data held in the cache and the data in the underlying data store.
Monday, February 29, 2016

Circuit Breaker Pattern

Handle faults that may take a variable amount of time to rectify when connecting to a remote service or resource. This pattern can improve the stability and resiliency of an application.
Monday, February 29, 2016

Compensating Transaction Pattern

Undo the work performed by a series of steps, which together define an eventually consistent operation, if one or more of the steps fail. Operations that follow the eventual consistency model are commonly found in cloud-hosted applications …
Monday, February 29, 2016

Competing Consumers Pattern

Enable multiple concurrent consumers to process messages received on the same messaging channel. This pattern enables a system to process multiple messages concurrently to optimize throughput, to improve scalability and availability, and to…
Monday, February 29, 2016

Compute Resource Consolidation Pattern

Consolidate multiple tasks or operations into a single computational unit. This pattern can increase compute resource utilization, and reduce the costs and management overhead associated with performing compute processing in cloud-hosted ap…
Monday, February 29, 2016

Command and Query Responsibility Segregation (CQRS) Pattern

Segregate operations that read data from operations that update data by using separate interfaces. This pattern can maximize performance, scalability, and security; support evolution of the system over time through higher flexibility; and p…
Monday, February 29, 2016

Event Sourcing Pattern Placeholder

Use an append-only store to record the full series of events that describe actions taken on data in a domain, rather than storing just the current state, so that the store can be used to materialize the domain objects. This pattern can simp…
Monday, February 29, 2016

External Configuration Store Pattern

Move configuration information out of the application deployment package to a centralized location. This pattern can provide opportunities for easier management and control of configuration data, and for sharing configuration data across ap…
Monday, February 29, 2016

Federated Identity Pattern Placeholder

Delegate authentication to an external identity provider. This pattern can simplify development, minimize the requirement for user administration, and improve the user experience of the application.
Monday, February 29, 2016

Gatekeeper Pattern

Protect applications and services by using a dedicated host instance that acts as a broker between clients and the application or service, validates and sanitizes requests, and passes requests and data between them. This can provide an addi…
Monday, February 29, 2016

Health Endpoint Monitoring Pattern

Implement functional checks within an application that external tools can access through exposed endpoints at regular intervals. This pattern can help to verify that applications and services are performing correctly
Monday, February 29, 2016

Index Table Pattern Placeholder

Create indexes over the fields in data stores that are frequently referenced by query criteria. This pattern can improve query performance by allowing applications to more quickly locate the data to retrieve from a data store.
Monday, February 29, 2016

Leader Election Pattern

Coordinate the actions performed by a collection of collaborating task instances in a distributed application by electing one instance as the leader that assumes responsibility for managing the other instances. This pattern can help to ensu…
Monday, February 29, 2016

Materialized View Pattern Placeholder

Generate prepopulated views over the data in one or more data stores when the data is formatted in a way that does not favor the required query operations. This pattern can help to support efficient querying and data extraction, and improve…
Monday, February 29, 2016

Pipes and Filters Pattern

Decompose a task that performs complex processing into a series of discrete elements that can be reused. This pattern can improve performance, scalability, and reusability by allowing task elements that perform the processing to be deployed…
Monday, February 29, 2016

Priority Queue Pattern

Use a queue that acts as a buffer between a task and a service that it invokes in order to smooth intermittent heavy loads that may otherwise cause the service to fail or the task to time out. This pattern can help to minimize the impact of…
Monday, February 29, 2016

Queue-based Load Leveling Pattern Placeholder

Use a queue that acts as a buffer between a task and a service that it invokes in order to smooth intermittent heavy loads that may otherwise cause the service to fail or the task to time out. This pattern can help to minimize the impact of…
Monday, February 29, 2016

Retry Pattern

Enable an application to handle anticipated, temporary failures when it attempts to connect to a service or network resource by transparently retrying an operation that has previously failed in the expectation that the cause of the failure …
Monday, February 29, 2016

Runtime Reconfiguration Pattern

Design an application so that it can be reconfigured without requiring redeployment or restarting the application. This helps to maintain availability and minimize downtime.
Monday, February 29, 2016

Scheduler Agent Supervisor Pattern Placeholder

Coordinate a set of actions across a distributed set of services and other remote resources, attempt to transparently handle faults if any of these actions fail, or undo the effects of the work performed if the system cannot recover from a …
Monday, February 29, 2016

Sharding Pattern

Divide a data store into a set of horizontal partitions or shards. This pattern can improve scalability when storing and accessing large volumes of data.
Monday, February 29, 2016

Static Content Hosting Pattern

Deploy static content to a cloud-based storage service that can deliver these directly to the client. This pattern can reduce the requirement for potentially expensive compute instances.
Monday, February 29, 2016

Throttling Pattern

Control the consumption of resources used by an instance of an application, an individual tenant, or an entire service. This pattern can allow the system to continue to function and meet service level agreements, even when an increase in de…
Monday, February 29, 2016

Valet Key Pattern

Use a token or key that provides clients with restricted direct access to a specific resource or service in order to offload data transfer operations from the application code. This pattern is particularly useful in applications that use cl…
Monday, February 29, 2016

Abstract factory pattern

Abstract Factory. The abstract factory pattern is used to provide a client with a set of related or dependant objects. The "family" of objects created by the factory are determined at run-time.
Monday, February 29, 2016

Adapter pattern

Adapter. The adapter pattern is used to provide a link between two otherwise incompatible types by wrapping the "adaptee" with a class that supports the interface required by the client.
Monday, February 29, 2016

Bridge pattern

The bridge pattern is a design pattern used in software engineering which is meant to "decouple an abstraction from its implementation so that the two can vary independently".The bridge uses encapsulation,aggregation, and can use inheritanc…
Monday, February 29, 2016

Builder Deisgn Pattern

Builder. The builder pattern is used to create complex objects with constituent parts that must be created in the same order or using a specific algorithm. An external class controls the construction algorithm.
Monday, February 29, 2016

Composite pattern

Composite. The composite pattern is used to create hierarchical, recursive tree structures of related objects where any element of the structure may be accessed and utilised in a standard manner.
Monday, February 29, 2016

Decorator pattern

Decorator. The decorator pattern is used to extend or alter the functionality of objects at run-time by wrapping them in an object of a decorator class. This provides a flexible alternative to using inheritance to modify behaviour.
Monday, February 29, 2016

Facade pattern

The facade pattern is used to define a simplified interface to a more complex subsystem.
Monday, February 29, 2016

Factory method pattern

Factory Method. The factory pattern is used to replace class constructors, abstracting the process of object generation so that the type of the object instantiated can be determined at run-time
Monday, February 29, 2016

Flyweight pattern

Flyweight. The flyweight pattern is used to reduce the memory and resource usage for complex models containing many hundreds, thousands or hundreds of thousands of similar objects.
Monday, February 29, 2016

Prototype pattern

Prototype. The prototype pattern is used to instantiate a new object by copying all of the properties of an existing object, creating an independent clone. This practise is particularly useful when the construction of a new object is ineffi…
Monday, February 29, 2016

Proxy pattern

Proxy. The proxy pattern is used to provide a surrogate or placeholder object, which references an underlying object. The proxy provides the same public interface as the underlying subject class, adding a level of indirection by accepting r…
Monday, February 29, 2016

Singleton pattern

Singleton. The singleton pattern ensures that only one object of a particular class is ever created. All further references to objects of the singleton class refer to the same underlying instance.
Monday, February 29, 2016

Strategy pattern

Strategy. The strategy pattern is used to create an interchangeable family of algorithms from which the required process is chosen at run-time.
Monday, February 29, 2016

Template method pattern

Template method pattern
Monday, February 29, 2016

Aerospike client as a memory cache

Aerospike is a distributed, scalable NoSQL database that can act as cache storing data to memory instead of to disk.
Monday, February 29, 2016

Redis client

Redis is an open source (BSD licensed), in-memory data structure store, used as database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs and …
Monday, February 29, 2016

RabbitMQ client

RabbitMQ is a message broker. The principal idea is pretty simple: it accepts and forwards messages. You can think about it as a post office: when you send mail to the post box you're pretty sure that Mr. Postman will eventually deliver the…
Monday, February 29, 2016

Owin client

Owin implementation of the distributed Nuget package Install Web Api 2.2 Self Host Nuget Package: PM Install-Package Microsoft.AspNet.WebApi.OwinSelfHost -Pre
Monday, February 29, 2016

Restful Api2 client

Restful Api 2: Attribute routing
Monday, February 29, 2016

MongoDb client

MongoDb is a document-based NoSQL store. The client adapted for C# is officially supported and not third party.
Monday, February 29, 2016

SignalR client

ASP.NET SignalR is a library for ASP.NET developers to add real-time web functionality to their applications. SignalR takes advantage of several transports, automatically selecting the best available transport given the client's and serve…
Monday, February 29, 2016

Rest HAL client

Rest HAL client
Monday, February 29, 2016

Rest HATEOAS

Rest HATEOAS
Monday, February 29, 2016

Managed Extensibility Framework (MEF)

The Managed Extensibility Framework or MEF is a library for creating lightweight, extensible applications. It allows application developers to discover and use extensions with no configuration required. It also lets extension developers eas…
Friday, July 7, 2017

Software Development AntiPatterns

AntiPatterns, like their design pattern counterparts, define an industry vocabulary for the common defective processes and implementations within organizations. A higher-level vocabulary simplifies communication between software practitione…