Bismillah
1) camunda
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https://docs.camunda.org/get-started/quick-start/?__hstc=252030934.fdedad24f900b0469e1cbbf05fdf49ab.1547695067134.1547695067134.1547695067134.1&__hssc=252030934.3.1547695067134&__hsfp=1188821749
https://docs.camunda.org/get-started/quick-start/service-task/
1)line break
shift + enter
2)new bmpn diagram
3) start event
4) double click to edit label
5) right click, context menu
select activity shape(rectangle)
6) canvas
$ drag it to preferred position
$ activity type : service task
click on the activyt shape, using wrench button
$ end event
$ send task, receive task, user task
manual task
business rule task
service task
script task
call activity
sub process(collapsed)
sub process(expanded)
$ thick circle -> end event
$ configure the service task
execute ways
external task pattern
open properties panel
implementation: External
Topic: charge-card
$ executable true, false: ignored by process engine
$ empty space on modeling canvas
properties of process itself
$ configure
ID = payment-retrieval
used by process engine as indentifier for executable process
human readablename
name = Payment Retrieval
$ File > Save File As..
payment.bpmn
$ implement an external task worker
after modeling the process, we want to
execute some business logic
$ business logican can be implemented in
different languages
$ Camunda ready-to-go task clients
java, javascript(Node js), Camunda REST Api
$ never worked java, prefer javascript
$ using java
jdk1.8, eclipse
$ maven dependency to external task client for new process application
org.camunda.bpm
camunda-externa-task-client
$Long polling in External TaskClient
external task instace
$
ExternalTaskClient client = ExternalTaskClient.create()
.baseUrl("http://localhost:8080/engine-rest")
.asyncResponseTimeout(10000)
.build()
client.subscribe("charge-card")
.lockDuration(1000)
.handler((externalTask, externalTaskService) -> {
// put your business logic service
// Get a process variable
String item = (String) externalTask.getVariable("item");
Long amount = (Long) externalTask.getVariable("amount");
// complete the task
externalTaskService.complete(externalTask)
})
.open();
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Using javascript(NodeJs)
NodeJs > v8.9.4
editor: Atom
mkdir charge-card-worker
cd ./charge-card-worker
npm init -y
npm install -s camunda-external-task-client-js
worker.js
---
const { Client, logger} = require('camunda-external-task-client-js');
const config = { baseUrl: 'http://localhost:8080/engine-rest', use: logger, asyncResponseTimeout: 10000 };
const client = new Client(config);
client.subscribe('charge-card', async function({ task, taskService }) {
//put your business logic here
// get a process variable
const amount = task.variables.get('amount');
const item = task.variables.get('amount');
console.log(`charge credit card with an amount of ${amount}$ for the item '${item}...');
// complete the task
await taskService.complete(task);
});
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node ./worker.js
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use the camunda modeler to deploy the process
deploy buttoon
deployment name: "Payment Retrieval"
---
verify the deployment with cockpit
http://localhost:8080/camunda/app/cockpit
login credentials: demo/demo
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start a process instance
curl or rest client
post http://localhost:8080/engine-rest/process-definition/key/payment-retrieval/start
{
"variables" :{
"amount" : {
"value" : 555,
"type" : "long"
},
"item" :{
"value": "item-xyz"
}
}
}
Content-Type: application/json
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Add a user task to the process
https://docs.camunda.org/get-started/quick-start/user-task/
modeler left-hand menu,
select the activity shape(rectangle)
drag it into position between the start event
and "Charge Crdit Card" service task
- Name it "Approve Payment"
- change activity type: User task
- by clicking on it
- using the wrench button menu
- User Task
---
Configure a User Task
Assignee: demo
Configure basic form in user Task
"Properties Panel"
Forms tab
3 form fields
clicking on plus button 3 times
field1:
ID: amount
Type: long
Label: Amount
field 2:
Id: item
Type: string
Label: Item
field 3:
Id:approved
Type: boolean
Label: Approved?
deploy the process
deploy button
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work on the task
http://localhost:8080/camunda/app/tasklist
credentials demo/demo
click on start process button
select Payment Retrieval from the list
set variables for process instance using egeneric form
click start
approve payment task in your task list
se;ect tasl
click on the diagram
highlight user task thats waiting to be worked on
form tab
---
https://camunda.com/learn/videos/
https://vimeo.com/235713307
- Camunda Basics Get Started
Camunda for Java Developers
https://vimeo.com/235728986
--
BPMN Deep Dive
https://vimeo.com/235729360
Watch now: Get to know the more advanced BPMN symbols and how to execute them.
process communicaton
https://vimeo.com/294101913
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error handling
https://vimeo.com/294099860
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https://forum.camunda.org/?__hstc=252030934.fdedad24f900b0469e1cbbf05fdf49ab.1547695067134.1547695067134.1547695067134.1&__hssc=252030934.2.1547699325736&__hsfp=1188821749
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https://docs.camunda.org/manual/7.10/?__hstc=252030934.fdedad24f900b0469e1cbbf05fdf49ab.1547695067134.1547695067134.1547695067134.1&__hssc=252030934.3.1547699325736&__hsfp=1188821749
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https://camunda.com/learn/webinars/
