Introduction to Activiti

Base on Activiti user guider.
http://www.activiti.org/userguide/index.html

1. [email protected]
2012.11.13
Introduction to Activiti

2. Contents
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•Introduction
•Simple Demo
•Configuration
•Deployment
•BPMN 2.0
•Integration with RCP
•actviti-karaf
•Reference

3. Introduction
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4. Why we need Activiti?
•Everyday we are faced with all kinds of different processes. For
example, when you order a book in an online bookstore a process is
executed to get the book paid, packaged and shipped to you.
•Activiti provides an open source framework to design, implement and
run processes. Organizations can use Activiti to implement their
business processes.
•Modeler, a web-based graphical workflow authoring
•Designer, an Eclipse plug-in for developing workflows
•Engine, the core workflow processor
•Explorer, a web tool to deploy process definitions
•Cycle, a web app for collaboration between business users and software
engineers
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5. Platform Introduction
•Apache V2 License
•Required software: JDK 5+, Ant 1.8.1+, Eclipse 3.6+
•Download: http://activiti.org/download.html
•Reporting problems
•Activiti Forums - http://forums.activiti.org/
•JIRA: http://jira.codehaus.org/browse/ACT
•Experimental features
•Not stable
•Sections marked with [EXPERIMENTAL],
•All classes that have .impl. in the package name
•Stable
•User guide mentions those classes as configuration values
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6. Simple Demo
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7. Simple Demo

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8. Simple Demo

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9. Configuration
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10. Creating a ProcessEngine

•Look for an activiti.cfg.xml file on the classpath and construct an engine
based on the configuration in that file.
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11. Creating a ProcessEngine(cont’)
•ProcessEngineConfiguration from configurated bean



•Don’t use a configuration file
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12. Creating a ProcessEngine(cont’)
•ProcessEngineConfiguration bean
This bean is used to construct the ProcessEngine.
•org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration
•Process engine is used in a standalone way. Activiti will take care of the
transactions.
•org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration
•An H2 in-memory database is used by default. The database will be created and
dropped when the engine boots and shuts down.
•org.activiti.spring.SpringProcessEngineConfiguration
•Process engine is used in a Spring environment.
•org.activiti.engine.impl.cfg.JtaProcessEngineConfiguration
•([EXPERIMENTAL]) Using when the engine runs in standalone mode, with JTA
transactions.
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13. Database configuration
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•jdbcUrl
•jdbcDriver
•jdbcUsername
•jdbcPassword
•Optional
•jdbcMaxActiveConnections: The maximum number of active connections.
Default is 10.
•jdbcMaxIdleConnections: The number of idle connections
•jdbcMaxCheckoutTime: Connection can be 'checked out' from the
connection pool before it is forcefully returned. Default is 20000 (20
seconds).
•jdbcMaxWaitTime: Chance to print a log status and re-attempt the
acquisition of a connection waiting time, Default is 20000 (20 seconds).

14. Database table names
•Database names of Activiti all start with ACT_
•ACT_RE_*: 'RE' stands for repository. 'static'' information such as process
definitions and, process resources (images, rules, etc.).
•ACT_RU_*: 'RU' stands for runtime. Runtime data of process instances,
user tasks,variables, jobs, etc. Removes the records when a process
instance ends.
•ACT_ID_*: 'ID' stands for identity. Identity information, such as users,
groups, etc.
•ACT_HI_*: 'HI' stands for history. Historic data, such as past process
instances, variables, tasks, etc.
•ACT_GE_*: general data, which is used in various use cases.
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15. Supported databases
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Activiti database type Versions tested Example JDBC URL Notes
h2 1.2.132 jdbc:h2:tcp://localhost/activiti
Default configured
database
mysql 5.1.11
jdbc:mysql://localhost:3306/activiti?aut
oReconnect=true
Tested using
mysql-connetor-
java database
driver
oracle 10.2.0 jdbc:oracle:thin:@localhost:1521:xe
postgres 8.4 jdbc:postgresql://localhost:5432/activiti
db2
DB2 9.7 using
db2jcc4
jdbc:db2://localhost:50000/activiti [EXPERIMENTAL]
mssql
2008 using
JDBC jtds-1.2.4
jdbc:jtds:sqlserver://localhost:1433/acti
viti
[EXPERIMENTAL]

16. Deployment
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17. Deployment
•Deploying programmatically

•Deploying with ant



•Deploying with Activiti Explorer



•Refer to User Guide
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18. Deploying with Activiti Explorer
•Example process


•Process definition database




•Processes
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19. BPMN 2.0
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20. Introduction
•What is BPMN?
•BPMN(Business Process Model and Notation) is a graphical
representation for specifying business processes in a business process
model.
•Business Process Management Initiative (BPMI) developed BPMN, which
has been maintained by the Object Management Group since the two
organizations merged in 2005. As of March 2011, the current version of
BPMN is 2.0.
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21. BPMN 2.0 Constructs
•Eclipse Activiti BPMN Designer
•Eclipse - http://activiti.org/designer/update/

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22. Integration with RCP
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23. BPMN Diagram

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24. Condition Expression






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25. Service Task

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26. Service Implement
• ProcessServiceDelegate

•LayerServiceDelegate

•CascalSessionHandlerServiceDelegate

•CpmSessionHandlerServiceDelegate

•ErrorSessionTypeHandlerServiceDelegate




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27. Service Implement(cont’)
• RunSessionServiceDelegate






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28. Example View
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29. activiti-karaf
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30. activiti-karaf
•This project packages and configures Activiti components (Runtime,
CLI and Web based tools) in Apache Karaf Container to make Activiti
available on a ready to use OSGi platform.
•Consists:
•Maven projects - to configure and package the Activiti components with
Apache Karaf
•Activiti CLI - set of Karaf Commands to manage Activiti/BPMN artifacts
deployed on the Activiti runtime in the Karaf Container
•Examples - example code to build and deploy osgi bundles with Activiti
BPMN artifacts to the Activiti runtime in the Karaf Container.
•Activiti Maven Archetype - to create a maven based project to develop,
build and deploy Activiti BPMN artifacts.
•Other patches to the Activiti components(like web based tools) to make
them usable in OSGi container





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31. activiti-karaf
•1. Download distribution archive
•2. Unzip the downloaded file to some location (e.g c:/demo)
note: if unzip tool prompts for overwrite files, ignore
•3. Install Required Software
•4. Start Activiti Karaf - cd to bin directory in unziped folder and
execute karaf
•5. Access Activiti Web tools
•5.1 Open Activiti Modeler - http://localhost:8181/activiti-modeler
•5.2 Open Activiti Explorer - http://localhost:8181/activiti-explorer
•use kermit/kermit as username/password for login
•…
•Run Activiti CLI commands



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Reference
•http://activiti.org/download.html
•http://activiti.org/userguide/index.html
•http://activiti.org/javadocs/index.html
•http://www.manning.com/rademakers2/
•http://code.google.com/p/activiti-karaf/

33. Thanks!