Activity diagrams are used to model,Īctivity diagrams are used to model processes and workflows. An activity can be attached to any modeling element to model its behavior. Why use Activity Diagrams?Īctivity diagram in UML allows you to create an event as an activity which contains a collection of nodes joined by edges. It is an object node that represents one input to or an output from an action.īoth input and output pins have precisely one edge. It provides a way to manage the execution flow of activity by sorting all the flows and cleaning up messy thins. This helps you to synchronize the input flow across a single output edge.Īn activity diagram that has a lot of flows gets very complicated and messy. It performs logical AND operation on all the incoming edges. A single incoming flow is divided into multiple parallel flows.Ī join node is opposite of a fork node as It has many incoming edges and a single outgoing edge. When data arrives at an incoming edge, it is duplicated and split across numerous outgoing edges simultaneously. It is similar to one too many decision parameters. A fork node has one incoming edge and numerous outgoing edges. Using a fork and join nodes, concurrent flows within an activity can be generated. If a partition cannot be shown clearly, then the name of a partition is written on top of the name of an activity. A single partition can refer to many things, such as classes, use cases, components, or interfaces. Activity partition/swimlaneĪn activity partition or a swimlane is a high-level grouping of a set of related actions. Activities start at an initial node and terminate at a final node. Edges are used to show a path or a flow of execution. Object nodes are used to describe objects used inside an activity. Control nodes represent the control flow of an activity. There can be action nodes, control nodes, or object nodes. Activities are a network of nodes connected by edges. It is a behavior that is divided into one or more actions. Activity diagrams consist of activities that are made up of actions that apply to behavioral modeling technology.Ĭomponents of Activity Diagram Activities This UML diagram focuses on the execution and flow of the behavior of a system instead of implementation. It is also called object-oriented flowchart. The basic purpose of activity diagrams is to capture the dynamic behavior of the system. The activity can be described as an operation of the system.
ACTIVITY DIAGRAM is basically a flowchart to represent the flow from one activity to another activity.
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