you use it to define a sequence of steps.
Video 149: Creating a Flow Registery
1- add spring-webflow dependency
2- add webflow-config namespace in your beans.xml
3- add webflow-config:flow-registry
here you set the base-path, which is the folder that will have the workflow definintion which is an xml file.
flow-location is the workflow file name,
4- add contact-flow.xml
when we define a flow, we basically define states in view-state, we will do that in the next tutorial
Video 150: Hooking Up URLs to Webflows
Here we will add all the required beans
These are things that you should remember,
as you can see the id "message" will be used in the url, so to start the workflow you go to ..../message
Video 151: Connecting Webflow and Apache Tiles
as you remember the contact-flow.xml looks like this
the view-state means jsp pages, so showContactForm should be a jsp page.
so, from the previous tutorial if you go to the url ..../message, it will go to the first page showContactForm.jsp
we should create this page, however to be able to use Apache Tiles with these pages you should add couple of extra beans
tilesViewResolver has been defined in previous videos.
now you can use Apache Tiles in your webflow pages.
In apache tiles definition we should add
as you can see showContactForm will redirect me to contact.jsp
Video 152: Creating a "Messages" Table
Nothing here, we added a Message table in the database, we will use it later
Video 153: Creating a Message Class
Here we added a Message Entity Class, and MessagesDao for database operations, we will use these classes later
Video 154: Adding a Message Form
as you remember before, we said that the workflow view state showContactForm will redirect us to contact.jsp
here we will define the contact.jsp page, which is going to contain a form
as you remember, we start the form by going to url ..../message, so we want the form to submit back to the same page, that is why we have commandName = message
you need also to add the hidden field _flowExecuationKey
Video 155: Transition
so now lets say we want to move from one page to another
1- you add this in your workflow
as you can see we define a transition on event send to go to the next state,
now we should add this
we added a hidden field to set the _eventId to send
now when we press the button we move to another state (another jsp page).
Video 156: Action States
in the previous tutorials we were defining view states in our workflow, view state will move us from one page to another,
here we will add Action State, in action state you can run code before moving to another page
as you can see, in the expression you write the name of the function that you want to execute, in this case it is the sendMessage() in the userService class.
Video 157: Linking to Webflows
Nothing much here, we did one thing.
as you can see we have a message object, and we set the value of username for this object
Video 158: Validating Webflow Forms
in order to validate the form in webflow we should add this
Video 159: Accessing User Details in Webflow
lets say you want to access user information, you can use the currentUser variable which comes with webflow
the usersService.getUser() is a function we defined, and we pass currentUser?.name, the question mark is used to check if currentUser is null or not (we talked about this before).