kaleo workflow in liferay

Slide 1

Kaleo Workflow and Liferay portal

Overview and lessons learnt

Willem Vermeer

Worth IT Den Haag

Kaleo Workflow

allows a user to define any number of simple to complex business processes/workflows, deploy them, and manage them through a portal interface. The processes have knowledge of users, groups and roles. You dont have to write a single line of code to accomplish this: all you have to do is create a single XML document.

Terminology

A workflow

- is executed by an asynchronous engine

- can be applied to Liferay Assets (including your own)

- consists of states, tasks, transitions, actions and notifications

Insert User Group Logo (please resize)

Task assignation

A task can be assigned to- a certain user

- a role

Important: only user with assigned task can transition it to the next task or state


Example


startsubmitreviewaccepted

submitaccept

reject

userreviewerstatetasktransition

role

Workflow in action


demo

Workflow Definition

Liferay EE has a graphical editor to create/modify workflows

Liferay CE has XML


Workflow definition part 1

LNLUG Demo

Two role, two tasks workflow example

1

created

true

submit

submit



submit

submit

Packages.com.liferay.portal.kernel.workflow.WorkflowStatusManagerUtil.updateStatus(Packages.com.liferay.portal.kernel.workflow.WorkflowConstants.toStatus("pending"), workflowContext);

]]>

javascript

onAssignment

submit

review



review

Review Notification

You have a new submission waiting for your review in the workflow.

text

email

onAssignment

regular

Application Reviewer

approve

approved

reject

submit

false



approved

approve

Packages.com.liferay.portal.kernel.workflow.WorkflowStatusManagerUtil.updateStatus(Packages.com.liferay.portal.kernel.workflow.WorkflowConstants.toStatus("approved"), workflowContext);

]]>

javascript

onEntry


How to apply a workflow to a custom asset


Workflow engineYour portlet app

WorkflowHandler

Workflow handler

public abstract interface WorkflowHandler {

public abstract java.lang.String getTitle(long assetId, Locale locale);

public abstract java.lang.Object updateStatus(int status, Map workflowContext) throws PortalException, SystemException;

// more...}Insert User Group Logo (please resize)

Demo app

CreateApplication portlet to make and submit an application

ListApplication portlet to display overview of applications

Uses control panel for task transitions


demo

Things to like about Kaleo workflow

Nice, deep integration with Liferay (users, roles)

Control panel access to workflow tasks

Simplicity


Room for improvement

Extensibility

- limited to scripting in workflow definition

Flexibility

- can't change definition once a workflow has started

Thread safety

- workflow engine is 100% thread UNsafe

Error recovery

- What's wrong with my XML?


Questions?


@willemvermeer

03/25/13

03/25/13

WWW.LIFERAY.COM

WWW.FACEBOOK.COOM/LIFERAY

@LIFERAY

03/25/13

03/25/13

WWW.LIFERAY.COM


@LIFERAY

03/25/13

WWW.LIFERAY.COM


@LIFERAY

03/25/13

WWW.LIFERAY.COM


@LIFERAY

03/25/13

WWW.LIFERAY.COM


@LIFERAY

03/25/13

WWW.LIFERAY.COM


@LIFERAY

03/25/13

WWW.LIFERAY.COM


@LIFERAY

03/25/13

WWW.LIFERAY.COM


@LIFERAY

03/25/13

WWW.LIFERAY.COM


@LIFERAY

03/25/13

WWW.LIFERAY.COM


@LIFERAY

03/25/13

WWW.LIFERAY.COM


@LIFERAY

03/25/13

WWW.LIFERAY.COM


@LIFERAY

03/25/13

WWW.LIFERAY.COM


@LIFERAY

03/25/13

kaleo workflow in liferay

Technology