Browse Definitions :
Definition

event sourcing

Contributor(s): Laura Fitzgibbons

Event sourcing is a coding practice used by computer programmers to model a system as a sequence of events in order to identify the changes made over time. Instead of using the traditional method of creating a program entity out of the application's current state, event sourcing stores business objects as a string of state-changing events. Whenever an object changes, a new event is appended to the event stream.

Event sourcing helps developers maintain consistency and integrity of an application. Having a complete history of object states allows for mistakes to easily be corrected, information loss to be reconstructed and code to be easily debugged. Stored events include state-altering actions such as mouse clicks, electronic inputs and key strikes.

Benefits of event sourcing

Event sourcing is a useful tool when a programmer wants to recreate a specific occurrence identically and persist it to various destinations within a network. Benefits of event sourcing include:

  • The ability to completely discard and rebuild an application by running the event stream on an empty application state.
  • Event log capabilities such as replaying, reversing and changing the order.
  • Convenience with modeling or predicting various behaviors and outcomes of an application.
  • Ensures better system reliability.
  • The ability to simply implement temporal queries.
  • Organizes system updates and patches.
  • Enables more accurate audit logging.

Applications of event sourcing

Event sourcing can be applied whenever a system would normally capture the state of a specific event. It is generally applied as part of a local use, such as a network or computer that is part of a single system. However, it is also possible to perpetuate information about events that are gathered from external systems.

A common example of an event sourcing application is a version control system. This type of system relies on frequent temporal queries and the ability to completely rebuild repository files.

The event replay capability of event sourcing is often used to remedy events that were received in the wrong order, a common issue with asynchronous messaging.

This was last updated in January 2019

Continue Reading About event sourcing

Join the conversation

1 comment

Send me notifications when other members comment.

Please create a username to comment.

How has event sourcing helped you to make your workflows more efficient?
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

  • compliance as a service (CaaS)

    Compliance as a Service (CaaS) is a cloud service service level agreement (SLA) that specified how a managed service provider (...

  • data protection impact assessment (DPIA)

    A data protection impact assessment (DPIA) is a process designed to help organizations determine how data processing systems, ...

SearchSecurity

  • cybersecurity insurance (cybersecurity liability insurance)

    Cybersecurity insurance, also called cyber liability insurance or cyber insurance, is a contract that an entity can purchase to ...

  • phishing

    Phishing is a form of fraud in which an attacker masquerades as a reputable entity or person in email or other communication ...

  • cybercrime

    Cybercrime is any criminal activity that involves a computer, networked device or a network.

SearchHealthIT

SearchDisasterRecovery

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

  • cloud insurance

    Cloud insurance is any type of financial or data protection obtained by a cloud service provider. 

SearchStorage

  • NVMe over Fabrics (NVMe-oF)

    NVMe over Fabrics, also known as NVMe-oF and non-volatile memory express over fabrics, is a protocol specification designed to ...

  • logical unit number (LUN)

    A logical unit number (LUN) is a unique identifier for designating an individual or collection of physical or virtual storage ...

  • CIFS (Common Internet File System)

    CIFS (Common Internet File System) is a protocol that gained popularity around the year 2000, as vendors worked to establish an ...

Close