Angular

Contents

Event
Gateway
Activity
1. Tasks
Data
Datasource
Artifact
1. Text Annoatation
Association
Sequence
Message

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BPMN Shapes in Angular Diagram

17 Jan 202224 minutes to read

BPMN shapes are used to represent the internal business procedure in a graphical notation and enables you to communicate the procedures in a standard manner. To create a BPMN shape, the type of the node should be set as “bpmn” and its shape should be set as any one of the built-in shape. BPMN Shapes. The following code example illustrates how to create a simple business process.

<ej-diagram width="100%" height="600" width="700">
<e-nodes>
    <e-node name ="node" type = "bpmn" [width]="100" [height]="100" [offsetX]="100" [offsetY]="100" borderWidth="2" borderColor="black" 
                 shape="event" event="end">
                <e-nodelabels>
                    <e-nodelabel text="End Event"></e-nodelabel>
                </e-nodelabels>
    </e-node>
</e-nodes>
</ej-diagram>

import { Component } from '@angular/core';

@Component({
  selector: 'ej-app',
  templateUrl: 'app/components/diagram/default.component.html'
})
export class DefaultComponent {}
}

BPMN diagram

NOTE

The default value for the property shape is “event”.

The list of BPMN shapes are as follows.

Shape	Image
Event
Gateway
Task
Message
DataSource
DataObject
Group

The BPMN shapes and its types are explained as follows.

Event

An event is notated with a circle and it represents an event in a business process. The type of events are as follows.

Start
End
Intermediate

The event property of the node allows you to define the type of the event. The default value of the event is “start”. The following code example illustrates how to create a BPMN Event.

<div>
    <ej-diagram width="100%" height="600" width="700" [nodes]="nodes">
    </ej-diagram>
</div>

import { Component } from '@angular/core';

@Component({
  selector: 'ej-app',
  templateUrl: 'app/components/diagram/default.component.html'
})
export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "node",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                //Sets the type as BPMN
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                //Sets the shape as BPMN Event
                shape: ej.datavisualization.Diagram.BPMNShapes.Event,
                //Sets type of the Event
                event: ej.datavisualization.Diagram.BPMNEvents.End,
                //Sets sub-type of the Event
                trigger: ej.datavisualization.Diagram.BPMNTriggers.None
            }
        ];
    }
}

BPMN event

Event triggers are notated as icons inside the circle and they represent the specific details of the process. The triggers property of node allows you to set the type of trigger and by default, it is set as “none”. The following table illustrates the type of event triggers.

Triggers	Start	Non-Interrupting Start	Intermediate	Non-Interrupting Intermediate	Throwing Intermediate	End
None
Message
Timer
Conditional
Link
Signal
Error
Escalation
Termination
Compensation
Cancel
Multiple
Parallel

Gateway

Gateway is used to control the flow of a process. It is represented as a diamond shape. To create a gateway, the shape property of node should be set as “gateway” and the gateway property can be set with any of the appropriate Gateways. The following code example illustrates how to create a BPMN Gateway.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "node",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                //Sets the shape as Gateway
                shape: ej.datavisualization.Diagram.BPMNShapes.Gateway,
                //Sets the type of BPMN Gateway
                gateway: ej.datavisualization.Diagram.BPMNGateways.None,
            }
        ];
    }
}

Gateway

NOTE

By default, the gateway will be set as “none”.

There are several types of gateways as tabulated

Gateways	Image
Exclusive
Parallel
Inclusive
Complex
EventBased
ExclusiveEventBased
ParallelEventBased

Activity

The activity is the task that is performed in a business process. It is represented by a rounded rectangle.

There are two types of activities .They are listed as follows.

Task – Occurs within a process and it is not broken down to finer level of detail.
Subprocess – Occurs within a process and it is broken down to finer level of detail.

To create a BPMN activity, you need to set the shape as “activity”. You also need to set the type of the BPMN Activity by using the activity property of node. By default, the type of the activity is set as “task”. The following code example illustrates how to create an activity.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "node",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                //Sets the bpmn shape as activity
                shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                //Sets the type of BPMN Activity
                activity: ej.datavisualization.Diagram.BPMNActivity.Task,
            }
        ];
    }
}

Activity

The different activities of BPMN process are listed as follows.

Tasks

The task property of node allows you to define the type of task such as sending, receiving, user based task etc… By default, the type property of task is set as “none”. The following code illustrates how to create different types of BPMN tasks.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "task",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                //Sets the type of bpmn shape
                shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                //Sets the type of BPMN Activity
                activity: ej.datavisualization.Diagram.BPMNActivity.Task,
                //Sets the type of BPMN Task Activity
                task: {
                    type: ej.datavisualization.Diagram.BPMNTasks.Send
                }
            }
        ];
    }
}

Task

The various types of BPMN tasks are tabulated as follows.

Task Type	Image
Service
Send
Receive
Instantiating Receive
Manual
Business Rule
User
Script

Subprocess

A sub-process is a group of tasks which is used to hide or reveal details of additional levels which can be done using collapsed property .

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "node",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                //Sets the type of bpmn shape
                shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                //Sets the type of BPMN Activity
                activity: ej.datavisualization.Diagram.BPMNActivity.SubProcess,
                //Sets the state of BPMN Subprocess
                subProcess: {
                    collapsed: true,
                }
            }
        ];
    }
}

subprocess

The different types of subprocess are as follows.

Event Subprocess
Transaction

Event Subprocess

A Sub-process is defined as an Event Sub-process when it is triggered by an event. An event-subprocess is placed within another subprocess which is not part of the normal flow of its parent process . You can set event to a sub-process with the event and trigger property of subprocess.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "node",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                //Sets the bpmn shape as activity
                shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                activity: ej.datavisualization.Diagram.BPMNActivity.SubProcess,
                //Creates event subprocess
                subProcess: {
                    type: ej.datavisualization.Diagram.BPMNSubProcessTypes.Event,
                    event: ej.datavisualization.Diagram.BPMNEvents.Start,
                    trigger: ej.datavisualization.Diagram.BPMNTriggers.Message
                }
            }
        ];
    }
}

Event subprocess

Transaction Subprocess

An transaction is a set of activities that logically belong together, in which all contained activities must complete their parts of the transaction; otherwise the process is undone. The execution result of a transaction is one of Successful Completion, Unsuccessful Completion (Cancel), and Hazard (Exception). The events property of subprocess allows to represent these results as an event attached to the subprocess.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "transactionSubProcess",
                width: 130,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                activity: ej.datavisualization.Diagram.BPMNActivity.SubProcess,
                //Creates transaction subprocess
                subProcess: {
                    type: ej.datavisualization.Diagram.BPMNSubProcessTypes.Transaction,
                    // Defines a collection of events to be attached 
                    events: [
                        //Defines type of the event and the position relative to the subprocess. 
                        {
                            event: "intermediate",
                            trigger: "cancel",
                            offset: { x: 0.25, y: 1 }
                        },
                        {
                            event: "intermediate",
                            trigger: "error",
                            offset: { x: 0.75, y: 1 }
                        }
                    ]
                }
            }
        ]
    }
}

Transaction subprocess

Processes

Processes is a array collection that defines the children values for BPMN subprocess.

export class NodesComponent {
    nodes: Array<any>;
    connectors: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "group",
                offsetX: 500,
                offsetY: 300,
                width: 300,
                height: 200,
                type: "bpmn",
                shape: ej.datavisualization.Diagram.BPMNShapes.Group,
                children: [{
                    name: "node",
                    marginLeft: 15,
                    marginTop: 15,
                    width: 250,
                    height: 150,
                    type: "bpmn",
                    shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                    activity: ej.datavisualization.Diagram.BPMNActivity.SubProcess,
                    subProcess: {
                        collapsed: false,
                        Processes: [{
                                name: "subnode01",
                                marginLeft: 20,
                                marginTop: 50,
                                width: 30,
                                height: 30,
                                type: "bpmn",
                                shape: ej.datavisualization.Diagram.BPMNShapes.Event
                            },
                            {
                                name: "subnode02",
                                marginLeft: 90,
                                marginTop: 25,
                                width: 100,
                                height: 80,
                                type: "bpmn",
                                shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                                activity: ej.datavisualization.Diagram.BPMNActivity.Task,
                                task: { type: "user" },
                                annotation: {
                                    text: "Review Customer Rating",
                                    length: 125,
                                    angle: 24,
                                    width: 100,
                                    height: 30
                                }
                        }]
                    }
                }]
            }]
        }
    }
        this.connectors = [{
                name: "connector1",
                sourceNode: "subnode01",
                targetNode: "subnode02"
            }];

process

####### Loop

Loop is a task that is internally being looped. The loop property of task allows you to define the type of loop. The default value for loop is “none”.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "task",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                //Sets the type of BPMN shape
                shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                //Sets the type of BPMN Activity
                activity: ej.datavisualization.Diagram.BPMNActivity.Task,
                //Sets the type of bpmn loops.
                task: {
                    loop: ej.datavisualization.Diagram.BPMNLoops.Standard
                }
            },{
                name: "subprocess",
                width: 100,
                height: 100,
                offsetX: 300,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                //Sets the type of BPMN activity
                activity: ej.datavisualization.Diagram.BPMNActivity.SubProcess,
                //Sets the type of bpmn loops.
                subProcess: {
                    loop: ej.datavisualization.Diagram.BPMNLoops.Standard
                }
            }
        ];
    }
}

Loop

The following table contains various types of BPMN loops.

Loops	Task	SubProcess
Standard
SequenceMultiInstance
ParallelMultiInstance

######## Compensation

Compensation is triggered when operation is partially failed and you can enable it with the compensation property of task.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "task",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                shape: ej.datavisualization.Diagram.BPMNShapes.Activity
                //Sets the type of BPMN Activity
                activity: ej.datavisualization.Diagram.BPMNActivity.Task,
                //Creates compensation task
                task: {
                    compensation: true
                }
            },{
                name: "subprocess",
                width: 100,
                height: 100,
                offsetX: 300,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                //Sets the type of BPMN Activity
                activity: ej.datavisualization.Diagram.BPMNActivity.SubProcess,
                //Creates compensation subprocess 
                subProcess: {
                    compensation: true
                }
            }
        ];
    }
}

Compensation

######## Call

A call activity is a global sub-process that is reused at various points of the business flow and you can set it with the call property of task.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "task",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                //Sets the type of BPMN Activity
                activity: ej.datavisualization.Diagram.BPMNActivity.Task,
                //Creates a call task
                task: {
                    call: true
                }
            }
        ];
    }
}

Call

######## Ad-Hoc

An ad hoc subprocess is a group of tasks that are executed in any order or skipped in order to fulfill the end condition and you can set it with the adhoc property of subprocess.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "task",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                activity: ej.datavisualization.Diagram.BPMNActivity.SubProcess,
                //Creates ad hoc subprocess
                subProcess: {
                    adhoc: true
                }
            }
        ];
    }
}

Ad-Hoc

######## Boundary

Boundary represents the type of task that is being processed. The boundary property of sub process allows you to define the type of boundary. By default, it is set as “default”.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "task",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                shape: ej.datavisualization.Diagram.BPMNShapes.Activity,
                activity: ej.datavisualization.Diagram.BPMNActivity.SubProcess,
                //Adds boundary to a subprocess 
                subProcess: {
                    boundary: ej.datavisualization.Diagram.BPMNBoundary.Call
                }
            }
        ];
    }
}

The following table contains various types of BPMN boundaries.

Boundary	Image
Call
Event
Default

Data

A data object represents information flowing through the process, such as data placed into the process, data resulting from the process, data that needs to be collected, or data that must be stored. To define a data object, set the shape as ej.datavisualization.Diagram.BPMNShapes.DataObject and type property defines whether data is an input or a output. You can create multiple instances of data object with the collection property of data.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "dataObject",
                width: 75,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                //Sets the type of the shape
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                //Sets the type of BPMN Shape
                shape: ej.datavisualization.Diagram.BPMNShapes.DataObject,
                //Sets collection as true when Data object is not a Single instance
                data: {
                    type: ej.datavisualization.Diagram.BPMNDataObjects.Input,
                    collection: true
                }
            }
        ];
    }
}

Data

The following table contains various representation of BPMN Data Object.

Boundary	Image
Collection Data Object
Data Input
Data Ouptput

Datasource

DataSource is used to store or access data associated with a business process. To create a data source, set the shape as “datasource”. The following code example illustrate how to create data source.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "dataSource",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                //Sets type of the shape
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                //Sets the type of bpmn shape
                shape: ej.datavisualization.Diagram.BPMNShapes.DataSource,
            }
        ];
    }
}

Datasource

Artifact

Artifact is used to show additional information about a Process in order to make it easier to understand. There are 2 types of artifacts in BPMN.

Text Annotation
Group

Text Annoatation

A BPMN object can be associated with a text annotation which does not affect the flow but gives details about objects within a flow. The annotation property of the node is used to connect an annotation element to the BPNN node.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "data",
                width: 75,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                //Sets type of the shape
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                //Sets the type of bpmn shape
                shape: ej.datavisualization.Diagram.BPMNShapes.DataObject,
                //Sets collection as true when Dataobject is not a Single instance
                data: {
                    collection: true
                },
                annotation: {
                    //Sets the text to annotate the bpmn shape
                    text: "Data Collection",
                    //Sets the angle between the bpmn shape and the annotation
                    angle: 45,
                    //Sets the dimensions of the text
                    width: 100,
                    height: 40,
                    //Sets the distance between the bpmn shape and the annotation 
                    length: 150
                }
            }
        ];
    }
}

Text Annotation

Group

A group is used to frame a part of the diagram, shows that elements included in it are logically belong together and don’t have any other semantics other than organizing elements. To create a Group, the shape property of node should be set as “group”. The following code example illustrates how to create a BPMN Group.

export class NodesComponent {
    nodes: Array<any>;
    constructor() {
        this.nodes = [
            {
                name: "group",
                width: 100,
                height: 100,
                offsetX: 100,
                offsetY: 100,
                borderWidth: 2,
                borderColor: "black",
                //Sets type of the shape
                type: ej.datavisualization.Diagram.Shapes.BPMN,
                //Sets the type of bpmn shape
                shape: ej.datavisualization.Diagram.BPMNShapes.Group
            }
        ];
    }
}

Group

BPMN Flows

BPMN Flows are lines that connects BPMN flow objects.

Association

BPMN Association flow is used to link flow objects with its corresponding text or artifact. An association is represented as a dotted graphical line with opened arrow. The type of association are as follows.

Directional
BiDirectional
Default

The association property allows you to define the type of association.The following code example illustrates how to create an association.

export class NodesComponent {
    connectors: Array<any>;
    constructor() {
        this.connectors = [
            {
                name: "connect1",
                sourcePoint: {
                    x: 100,
                    y: 200
                },
                targetPoint: {
                    x: 300,
                    y: 200
                },
                segments: [{
                    type: "straight"
                }],
                shape: {
                    type: "bpmn",
                    //Sets the type of the flow as association
                    flow: "association",
                    //Sets the type of association
                    association: "bidirectional"
                }
            }
        ];
    }
}

Association

The following table demonstrates the visual representation of assosiation flows.

Association	Image
Default
Directional
BiDirectional

NOTE

The default value for the property association is “default”.

Sequence

A Sequence flow shows the order in which the activities are performed in a BPMN Process and is represented with a solid graphical line.The type of sequence are as follows.

Normal
Conditional
Default

The sequence property allows you to define the type of sequence.The following code example illustrates how to create a sequence flow.

export class NodesComponent {
    connectors: Array<any>;
    constructor() {
        this.connectors = [
            {
                name: "connect1",
                sourcePoint: {
                    x: 100,
                    y: 200
                },
                targetPoint: {
                    x: 300,
                    y: 200
                },
                segments: [{
                    type: "straight"
                }],
                shape: {
                    type: "bpmn",
                    flow: "sequence",
                    //Sets the type of sequence flow
                    sequence: "conditional"
                }
            }
        ];
    }
}

Sequence

The following table contains various representation of sequence flows.

Sequence	Image
Default
Conditional
Normal

NOTE

The default value for the property sequence is “normal”.

Message

A Message flow shows the flow of messages between two Participents.A message flow is represented by dashed line.The type of message are as follows.

InitiatingMessage
NonInitiatingMessage
Default

The message property allows you to define the type of message.The following code example illustrates how to define a message flow.

export class NodesComponent {
    connectors: Array<any>;
    constructor() {
        this.connectors = [
            {
                name: "connect1",
                sourcePoint: {
                    x: 100,
                    y: 200
                },
                targetPoint: {
                    x: 300,
                    y: 200
                },
                segments: [{
                    type: "straight"
                }],
                shape: {
                    type: "bpmn",
                    flow: "message",
                    //Sets the type of message flow
                    message: "initiatingmessage"
                }
            }
        ];
    }
}

Message

The following table contains various representation of message flows.

Message	Image
Default
InitiatingMessage
NonInitiatingMessage

NOTE

The default value for the property message is “default”.

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