State Machine workflow implementation in State Mode

Overview

A state machine workflow consists of a group of States. A status is indicatedInitial status. Each status can receive a group of specific events. Depending on the event, you can switch to another State. State Machine WorkflowThere can be final states. When the final state is switched, the workflow is complete.

Scenario

A simple state machine workflow designed for my previous blog is as follows:

Let's design a workflow using the state pattern in the design pattern.

Design

Let's take a look at its user case function design:

Let's take a look at its class digoal design:

 

Implementation

Create an enums class first:

/*************************************** **************************************** * ** Class Name: enums ** Author: Spring Yang ** create Date: 2013-3-13 ** modify: Spring Yang ** modify Date: 2012-3-13 ** summary: enums class ************************************** **************************************** * **/using system; namespace workflowcommon {public Enum applicationstate {none, draft, inprogress, complete,} public Enum workflowstate {none, common, Manager, done, refuse} [flags] public Enum activitystate {create = 1, edit = 2, resbmit = 4, submit = 8, revoke = 16, approve = 32, reject = 64, read = 128, none = 256 }}
 

 

Create an iactivity interface:

 
/*************************************** **************************************** * ** Class Name: iactivity ** Author: Spring Yang ** create Date: 2013-3-13 ** modify: Spring Yang ** modify Date: 2012-3-13 ** summary: iactivity interface ************************************** **************************************** * **/namespace workflowservice. idal {using workflowcommon; public interface iactivity {workflowstate execute (activitystate );}}
 

 

Create an iactivitystate Interface

/*************************************** **************************************** * ** Class Name: iactivitystate ** Author: Spring Yang ** create Date: 2013-3-13 ** modify: Spring Yang ** modify Date: 2012-3-13 ** summary: iactivitystate interface ************************************** **************************************** * **/namespace workflowservice. idal {using workflowcommon; public interface iactivitystate {activitystate getactivitystate ();}}
 

 

Create an istatebase Interface

/*************************************** **************************************** * ** Class Name: istatebase ** Author: Spring Yang ** create Date: 2013-3-13 ** modify: Spring Yang ** modify Date: 2012-3-13 ** summary: istatebase interface ************************************** **************************************** * **/namespace workflowservice. idal {using workflowcommon; public interface istatebase: iactivity, iactivitystate {workflowstate getcurrentstate ();}}
 

 

Create commonstate class again

/*************************************** **************************************** * ** Class Name: commonstate ** Author: Spring Yang ** create Date: 2013-3-13 ** modify: Spring Yang ** modify Date: 2012-3-13 ** summary: commonstate class ************************************** **************************************** * **/namespace workflowservice. dal {using workflowcommon; using idal; public class commonstate: istatebase {public workflowstate execute (activitystate) {If (activitystate = activitystate. submit | activitystate = activitystate. resbmit) return workflowstate. manager; return workflowstate. common;} public workflowstate getcurrentstate () {return workflowstate. common;} public activitystate getactivitystate () {return activitystate. submit | activitystate. read | activitystate. revoke | activitystate. resbmit ;}}}

 

Create a donestate class

/*************************************** **************************************** * ** Class Name: donestate ** Author: Spring Yang ** create Date: 2013-3-13 ** modify: Spring Yang ** modify Date: 2012-3-13 ** summary: donestate class ************************************** **************************************** * **/namespace workflowservice. dal {using workflowcommon; using idal; public class donestate: istatebase {public workflowstate execute (activitystate) {return workflowstate. done;} public workflowstate getcurrentstate () {return workflowstate. done;} public activitystate getactivitystate () {return activitystate. read ;}}}
 

 

Create a managestate class.

/*************************************** **************************************** * ** Class Name: managestate ** Author: Spring Yang ** create Date: 2013-3-13 ** modify: Spring Yang ** modify Date: 2012-3-13 ** summary: managestate class ************************************** **************************************** * **/namespace workflowservice. dal {using workflowcommon; using idal; public class managestate: istatebase {public workflowstate execute (activitystate) {If (activitystate = activitystate. approve) return workflowstate. done; If (activitystate = activitystate. revoke) return workflowstate. common; return workflowstate. refuse;} public workflowstate getcurrentstate () {return workflowstate. manager;} public activitystate getactivitystate () {return activitystate. approve | activitystate. reject | activitystate. read ;}}}

 

Create a refusestate class

/*************************************** **************************************** * ** Class Name: refusestate ** Author: Spring Yang ** create Date: 2013-3-13 ** modify: Spring Yang ** modify Date: 2012-3-13 ** summary: refusestate class ************************************** **************************************** * **/namespace workflowservice. dal {using workflowcommon; using idal; public class refusestate: istatebase {public workflowstate execute (activitystate) {return workflowstate. refuse;} public workflowstate getcurrentstate () {return workflowstate. refuse;} public activitystate getactivitystate () {return activitystate. read ;}}}
 

 

Create a statemapping class:

/*************************************** **************************************** * ** Class Name: statemapping ** Author: Spring Yang ** create Date: 2013-3-13 ** modify: Spring Yang ** modify Date: 2012-3-13 ** summary: statemapping class ************************************** **************************************** * **/namespace workflowservice. help {using system. collections. generic; using Dal; using idal; public class statemapping {public list <istatebase> statebaseslist; private statemapping () {Init ();} Private Static statemapping _ instance; public static statemapping instance {get {If (_ instance = NULL) _ instance = new statemapping (); Return _ instance ;}} private void Init () {statebaseslist = new list <istatebase> {New commonstate (), new managestate (), new donestate (), new refusestate ()};}}}

 

Create workflowengine class

/*************************************** **************************************** * ** Class Name: workflowengine ** Author: Spring Yang ** create Date: 2013-3-13 ** modify: Spring Yang ** modify Date: 2012-3-13 ** summary: workflowengine class ************************************** **************************************** * **/namespace workflowservice. bll {using workflowcommon; using Dal; using help; using idal; public class workflowengine {private istatebase getcurrentworkflowstatebyworkflowstate (workflowstate) {foreach (VAR istatebase in statemapping. instance. statebaseslist) {If (istatebase. getcurrentstate () = workflowstate) return istatebase;} return New commonstate ();} public workflowstate execute (workflowstate, activitystate) {return getcurrentworkflowstatebyworkflowstate (workflowstate ). execute (activitystate);} public activitystate getactivitystatebyworkflowstate (workflowstate) {return getcurrentworkflowstatebyworkflowstate (workflowstate ). getactivitystate ();}}}

 

Create nunit Test

/*************************************** **************************************** * ** Class Name: teststateworkflowtest ** Author: Spring Yang ** create Date: 2013-3-13 ** modify: Spring Yang ** modify Date: 2012-3-13 ** summary: teststateworkflowtest interface ************************************** **************************************** * **/namespace testcommunication. workflowservice {using common; using nunit. framework; using wfservice; public class teststateworkflowtest: baseactivity {private workflowserviceclient wfserviceinstance {get {return New workflowserviceclient ();} [test] public void testnewworkflow () {var appentity = new appinfomodel {activitystate = activitystate. submit. tostring (), appid = "001", workflowname = "teststateworkflow", userid = "001", currentstate = "common"}; var result = wfserviceinstance. newworkflow (appentity); assert. areequal (result, "manage");} [test] public void testmanageapproveworkflow () {var appentity = new appinfomodel {activitystate = activitystate. submit. tostring (), appid = "002", workflowname = "teststateworkflow", userid = "002", currentstate = "common"}; var result = wfserviceinstance. newworkflow (appentity); assert. areequal (result, "manage"); var manageentity = new appinfomodel {activitystate = activitystate. approve. tostring (), appid = "002", workflowname = "teststateworkflow", userid = "003", currentstate = "manage"}; var manageresult = wfserviceinstance. execute (manageentity); assert. areequal (manageresult, "done");} [test] public void testmanagerejectworkflow () {var appentity = new appinfomodel {activitystate = activitystate. submit. tostring (), appid = "004", workflowname = "teststateworkflow", userid = "004", currentstate = "common"}; var result = wfserviceinstance. newworkflow (appentity); assert. areequal (result, "manage"); var manageentity = new appinfomodel {activitystate = activitystate. reject. tostring (), appid = "004", workflowname = "teststateworkflow", userid = "005", currentstate = "manage"}; var manageresult = wfserviceinstance. execute (manageentity); assert. areequal (manageresult, "refuse");} [test] public void testsaveworkflow () {var appentity = new appinfomodel {activitystate = activitystate. save. tostring (), appid = "006", workflowname = "teststateworkflow", userid = "006", currentstate = "common"}; var result = wfserviceinstance. newworkflow (appentity); assert. areequal (result, "common");} [test] public void testrevokeworkflow () {var appentity = new appinfomodel {activitystate = activitystate. submit. tostring (), appid = "007", workflowname = "teststateworkflow", userid = "007", currentstate = "common"}; var result = wfserviceinstance. newworkflow (appentity); assert. areequal (result, "manage"); var commonentity = new appinfomodel {activitystate = activitystate. revoke. tostring (), appid = "007", workflowname = "teststateworkflow", userid = "007", currentstate = "common"}; var revokeresult = wfserviceinstance. execute (commonentity); assert. areequal (revokeresult, "common");} [test] public void testresubmitworkflow () {var appentity = new appinfomodel {activitystate = activitystate. submit. tostring (), appid = "007", workflowname = "teststateworkflow", userid = "007", currentstate = "common"}; var result = wfserviceinstance. newworkflow (appentity); assert. areequal (result, "manage"); var commonentity = new appinfomodel {activitystate = activitystate. revoke. tostring (), appid = "007", workflowname = "teststateworkflow", userid = "007", currentstate = "common"}; var revokeresult = wfserviceinstance. execute (commonentity); assert. areequal (revokeresult, "common"); var resubmitentity = new appinfomodel {activitystate = activitystate. resubmit. tostring (), appid = "007", workflowname = "teststateworkflow", userid = "007", currentstate = "common"}; var lastresult = wfserviceinstance. execute (resubmitentity); assert. areequal (lastresult, "manage ");}}}

 

View the running result:

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Author: Spring Yang

Source: http://www.cnblogs.com/springyangwc/

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