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Posted to dev@roller.apache.org by x86 wj <wj...@gmail.com> on 2018/02/24 04:39:16 UTC
where can i find the controller class or package
Roller is in a web architecture of "presentation -> business logic ->
persistent layer". But the project is complex. From the source code, I have
no idea which packages(or classes) are responsible for the controller. The
following will list an example to express my meaning.
For example, Jpetstore is a small project with only 24 classes.
https://github.com/mybatis/jpetstore-6/blob/master/src/main/java/org/mybatis/jpetstore/web/actions/OrderActionBean.java
This link shows that OrderActionBean is one of the controller class in
web.action package. OrderActionBean.listOrders is one function entry
provided by system.
So, I would like to know, in roller,* where can I find the similar
'controllerClass.method()' that clearly present function's entry*. Can you
give me some example?
Thanks a lot for your time. I really need your help.
Best regards,
Wuxia Jin
Re: where can i find the controller class or package
Posted by Greg Huber <gr...@gmail.com>.
>(2) Then, as you said, WeblogRequestMapper is the overall entry for
>processing all request. WeblogRequestMapper.handleRequest() will parse the
>requesting url, then find the corresponding "Action name" to process the
>request.
WeblogRequestMapper will map all requests looking for the front tier, if
no match does a chain.doFilter(..). If the request ends in .rol (aka
.action) will be picked up by the struts application. The struts .action
as been replaced by .rol.
>(b) Another question is that, in class BookmarkEdit, there is "save()"
>method besides "myPrepare()" and "execute()".
>From the code,* I cannot clearly see how the save() method is called, or
>who will call save() method?*
from bookmarkEdit.jsp the save method is called via Dynamic Method
Invocation (DMI)
https://cwiki.apache.org/confluence/display/WW/Action+Configuration#ActionConfiguration-DynamicMethodInvocation
eg save is called via !save on the submit:
<s:submit value="%{getText('generic.save')}" action="%{#mainAction}!save"/>
<s:submit value="%{getText('generic.cancel')}" action="bookmarkEdit!cancel"
/>
Cheers Greg
On 24 February 2018 at 19:02, x86 wj <wj...@gmail.com> wrote:
> hi Greg,
>
> *1. According to your explanation, I try to express the request
> processing. *
> When a request comes in:
> (1) Firstly, several filterings will filter the request.
> (2) Then, as you said, WeblogRequestMapper is the overall entry for
> processing all request. WeblogRequestMapper.handleRequest() will parse
> the
> requesting url, then find the corresponding "Action name" to process the
> request.
> (3) After finding the "Action name", then corresponding Action Class will
> really process the business function. while the mapping from "action name'
> to "action class" is specified in Struts.xml.
> (4) The 'Action class' will process the logic. It firstly runs
> its myPrepare() method, then call the execution() method.
> (5)After processing the execute() method, then continue the pass the
> several filterings.
>
> The processing of an incoming request is right as what I said?
>
> *2. From the structs, each "action" corresponds to a "action class". Aslo,
> There is more than one action is processed by the same action class.*
> For example,
>
> <action name="bookmarkAdd"
> class="org.apache.roller.weblogger.ui.struts2.editor.
> BookmarkEdit">
> <param name="actionName">bookmarkAdd</param>
> <param name="pageTitle">bookmarkForm.add.title</param>
> <result name="input" type="tiles">.BookmarkEdit</result>
> <result name="success" type="chain">bookmarks</result>
> <result name="error" type="chain">bookmarks</result>
> </action>
>
> <action name="bookmarkEdit"
> class="org.apache.roller.weblogger.ui.struts2.editor.
> BookmarkEdit">
> <param name="actionName">bookmarkEdit</param>
> <param name="pageTitle">bookmarkForm.edit.title</param>
> <result name="input" type="tiles">.BookmarkEdit</result>
> <result name="success" type="chain">bookmarks</result>
> <result name="cancel" type="redirectAction">
> <param name="actionName">bookmarks</param>
> <param name="weblog">${weblog}</param>
> <param name="folderId">${folderId}</param>
> </result>
> <result name="error" type="chain">bookmarkEdit</result>
> </action>
>
> (a) we can see "bookmarkAdd" and "bookmarkEdit' the two actions are both
> processed by "org.apache.roller.weblogger.ui.struts2.editor.BookmarkEdit".
> But there is only one execute() method in class BookmarkEdit. It means
> "bookmarkAdd' and "bookmarkEdit" are processed by the same execution()
> method?
> If so, *how does execute() distinguish the two different actions to process
> differently?*
>
> (b) Another question is that, in class BookmarkEdit, there is "save()"
> method besides "myPrepare()" and "execute()".
> From the code,* I cannot clearly see how the save() method is called, or
> who will call save() method?*
>
>
>
> I am new to structs and roller. A lot of details I would like to ask and
> hope make it clear.
> Thank you for your help.
> Best regards,
> Wuxia Jin
>
>
> On Sat, Feb 24, 2018 at 12:07 PM, Greg Huber <gr...@gmail.com> wrote:
>
> > .....should be WeblogRequestMapper
> >
> > Cheers Greg
> >
> > On 24 February 2018 at 04:39, x86 wj <wj...@gmail.com> wrote:
> >
> > > Roller is in a web architecture of "presentation -> business logic ->
> > > persistent layer". But the project is complex. From the source code, I
> > have
> > > no idea which packages(or classes) are responsible for the controller.
> > The
> > > following will list an example to express my meaning.
> > >
> > > For example, Jpetstore is a small project with only 24 classes.
> > > https://github.com/mybatis/jpetstore-6/blob/master/src/
> > > main/java/org/mybatis/jpetstore/web/actions/OrderActionBean.java
> > >
> > > This link shows that OrderActionBean is one of the controller class in
> > > web.action package. OrderActionBean.listOrders is one function entry
> > > provided by system.
> > >
> > > So, I would like to know, in roller,* where can I find the similar
> > > 'controllerClass.method()' that clearly present function's entry*. Can
> > you
> > > give me some example?
> > >
> > > Thanks a lot for your time. I really need your help.
> > > Best regards,
> > > Wuxia Jin
> > >
> >
>
Re: where can i find the controller class or package
Posted by Dave <sn...@gmail.com>.
Yes, that looks good to me.
Glad to help.
Dave
On Sun, Feb 25, 2018 at 12:37 PM x86 wj <wj...@gmail.com> wrote:
> @Dave @Greg,
>
> 1. DMI. I didn't even know that. Thank you for telling me about it. :
> )
>
> 2. According to the source code and your answers, I think the handing
> process is much clearer for me.
>
> When a request is coming...it will pass through a lot of filters in order.
> web.xml illustrates the filtering order, and the last two filters are
> *RequestMappingFilter* and *struts2*.
>
> (1) When the request is passing in RequestMappingFilter.
>
> org.apache.roller.weblogger.ui.rendering.web.WeblogRequestMapper.handleRequest（）process
> this request.
> It parses the request url, and finds a certain XXXServlet to process this
> request. So the XXXServlet will really start processing the business logic
> about the request.
> This part is mainly located in
> org.apache.roller.weblogger.ui.rendering.servlet, focusing on weblog page
> rendering system.
>
> (2)If the request is not being processed, then it will pass in the last
> filter- struts2. struts2.xml has mapped the action name to action class.
> It will find a certain XXXActionClass to process the request. So XXXAction
> Class will really start processing the business logic about the request.
> This part mainly is located in org.apache.roller.weblogger.ui.struts2,
> focusing on weblog admin and interface action, such as bookmark, category,
> entry,.....
>
> Great. I think it is right. aha?
>
> Thanks a lot for your help. I really appreciate it.
> Best regards,
> Wuxia
>
>
> On Sun, Feb 25, 2018 at 3:47 AM, Greg Huber <gr...@gmail.com> wrote:
>
> > good write up!
> >
> > Cheers Greg
> >
> > On 24 February 2018 at 20:02, Dave <sn...@gmail.com> wrote:
> >
> > > Hi Wuxia Jin,
> > >
> > > Some answers below...
> > >
> > >
> > > > The processing of an incoming request is right as what I said?
> > >
> > > Yes, that is mostly correct, but not all requests are handle by Struts.
> > >
> > > To understand how Roller works, you should also look at the web.xml
> file
> > > and how it maps URL paths to Java classes.
> > >
> > > Also, understand that there are two parts of Roller:
> > >
> > > 1) the weblog editor and admin interface, which exists at the URL path
> > > /roller-ui and is written using Struts and JSP pages (see the
> struts.xml
> > > and tiles.xml to see how Struts is configured) and
> > >
> > > 2) the Roller weblog page rendering system, which uses a set of
> Servlets
> > > which call the Velocity template engine to display weblog pages using
> > > Velocity templates.
> > >
> > > In the web.xml there is a RequestMapping filter. If that filter sees a
> > > request for a weblog page then it calls a servlet to display the weblog
> > > page or weblog RSS feed (using Velocity).
> > >
> > > If the RequestMapper does not handle a request, then the next filter,
> > which
> > > is the Struts filter, will handle the request and determine which
> Struts
> > > action is to be called.
> > >
> > >
> > > > *2. From the structs, each "action" corresponds to a "action class".
> > > Aslo,
> > > > There is more than one action is processed by the same action class.*
> > > > If so, *how does execute() distinguish the two different actions to
> > > process
> > > differently?*
> > >
> > > The BookmarkEdit action is called twice.
> > >
> > > First, it is called with no method name specified in the URL and the
> > > execute() method returns INPUT, which tells struts to display the
> > > ".BookmarkEdit" Tile which includes the BookmarkEdit.jsp page. That
> > causes
> > > the Bookmark Edit page to be displayed to the user.
> > >
> > > Second, when a user clicks the Save button then Bookmark edit action is
> > > called again but this time with the save method specified in the URL
> (by
> > a
> > > !save notation). That means that the save() method gets called, and a
> new
> > > bookmark is added or an existing bookmark is updated.
> > >
> > >
> > > > (b) Another question is that, in class BookmarkEdit, there is
> "save()"
> > > > method besides "myPrepare()" and "execute()".
> > > > From the code,* I cannot clearly see how the save() method is called,
> > or
> > > > who will call save() method?*
> > >
> > > Yes, that is confusing and sort of a hack. There is a form parameter
> > that
> > > carries an action name of either "bookmarkAdd" or "bookmarkEdit" and
> > there
> > > is a method called isAdd() which looks at that parameter and decides
> > > whether to add a new bookmark or update an existing bookmark.
> > >
> > > Hope that helps.
> > >
> > > Best regards,
> > > Dave
> > >
> > >
> > > On Sat, Feb 24, 2018 at 2:02 PM x86 wj <wj...@gmail.com> wrote:
> > >
> > > > hi Greg,
> > > >
> > > > *1. According to your explanation, I try to express the request
> > > > processing. *
> > > > When a request comes in:
> > > > (1) Firstly, several filterings will filter the request.
> > > > (2) Then, as you said, WeblogRequestMapper is the overall entry for
> > > > processing all request. WeblogRequestMapper.handleRequest() will
> > parse
> > > the
> > > > requesting url, then find the corresponding "Action name" to process
> > the
> > > > request.
> > > > (3) After finding the "Action name", then corresponding Action Class
> > will
> > > > really process the business function. while the mapping from "action
> > > name'
> > > > to "action class" is specified in Struts.xml.
> > > > (4) The 'Action class' will process the logic. It firstly runs
> > > > its myPrepare() method, then call the execution() method.
> > > > (5)After processing the execute() method, then continue the pass the
> > > > several filterings.
> > > >
> > > > The processing of an incoming request is right as what I said?
> > > >
> > > > *2. From the structs, each "action" corresponds to a "action class".
> > > Aslo,
> > > > There is more than one action is processed by the same action class.*
> > > > For example,
> > > >
> > > > <action name="bookmarkAdd"
> > > > class="org.apache.roller.weblogger.ui.struts2.editor.
> > > BookmarkEdit">
> > > > <param name="actionName">bookmarkAdd</param>
> > > > <param name="pageTitle">bookmarkForm.add.title</param>
> > > > <result name="input" type="tiles">.BookmarkEdit</result>
> > > > <result name="success" type="chain">bookmarks</result>
> > > > <result name="error" type="chain">bookmarks</result>
> > > > </action>
> > > >
> > > > <action name="bookmarkEdit"
> > > > class="org.apache.roller.weblogger.ui.struts2.editor.
> > > BookmarkEdit">
> > > > <param name="actionName">bookmarkEdit</param>
> > > > <param name="pageTitle">bookmarkForm.edit.title</param>
> > > > <result name="input" type="tiles">.BookmarkEdit</result>
> > > > <result name="success" type="chain">bookmarks</result>
> > > > <result name="cancel" type="redirectAction">
> > > > <param name="actionName">bookmarks</param>
> > > > <param name="weblog">${weblog}</param>
> > > > <param name="folderId">${folderId}</param>
> > > > </result>
> > > > <result name="error" type="chain">bookmarkEdit</result>
> > > > </action>
> > > >
> > > > (a) we can see "bookmarkAdd" and "bookmarkEdit' the two actions are
> > both
> > > > processed by "org.apache.roller.weblogger.ui.struts2.editor.
> > > BookmarkEdit".
> > > > But there is only one execute() method in class BookmarkEdit. It
> means
> > > > "bookmarkAdd' and "bookmarkEdit" are processed by the same
> execution()
> > > > method?
> > > > If so, *how does execute() distinguish the two different actions to
> > > process
> > > > differently?*
> > > >
> > > > (b) Another question is that, in class BookmarkEdit, there is
> "save()"
> > > > method besides "myPrepare()" and "execute()".
> > > > From the code,* I cannot clearly see how the save() method is called,
> > or
> > > > who will call save() method?*
> > > >
> > > >
> > > >
> > > > I am new to structs and roller. A lot of details I would like to ask
> > and
> > > > hope make it clear.
> > > > Thank you for your help.
> > > > Best regards,
> > > > Wuxia Jin
> > > >
> > > >
> > > > On Sat, Feb 24, 2018 at 12:07 PM, Greg Huber <gr...@gmail.com>
> > > wrote:
> > > >
> > > > > .....should be WeblogRequestMapper
> > > > >
> > > > > Cheers Greg
> > > > >
> > > > > On 24 February 2018 at 04:39, x86 wj <wj...@gmail.com> wrote:
> > > > >
> > > > > > Roller is in a web architecture of "presentation -> business
> logic
> > ->
> > > > > > persistent layer". But the project is complex. From the source
> > code,
> > > I
> > > > > have
> > > > > > no idea which packages(or classes) are responsible for the
> > > controller.
> > > > > The
> > > > > > following will list an example to express my meaning.
> > > > > >
> > > > > > For example, Jpetstore is a small project with only 24 classes.
> > > > > > https://github.com/mybatis/jpetstore-6/blob/master/src/
> > > > > > main/java/org/mybatis/jpetstore/web/actions/OrderActionBean.java
> > > > > >
> > > > > > This link shows that OrderActionBean is one of the controller
> class
> > > in
> > > > > > web.action package. OrderActionBean.listOrders is one function
> > entry
> > > > > > provided by system.
> > > > > >
> > > > > > So, I would like to know, in roller,* where can I find the
> similar
> > > > > > 'controllerClass.method()' that clearly present function's
> entry*.
> > > Can
> > > > > you
> > > > > > give me some example?
> > > > > >
> > > > > > Thanks a lot for your time. I really need your help.
> > > > > > Best regards,
> > > > > > Wuxia Jin
> > > > > >
> > > > >
> > > >
> > >
> >
>
Re: where can i find the controller class or package
Posted by x86 wj <wj...@gmail.com>.
@Dave @Greg,
1. DMI. I didn't even know that. Thank you for telling me about it. :
)
2. According to the source code and your answers, I think the handing
process is much clearer for me.
When a request is coming...it will pass through a lot of filters in order.
web.xml illustrates the filtering order, and the last two filters are
*RequestMappingFilter* and *struts2*.
(1) When the request is passing in RequestMappingFilter.
org.apache.roller.weblogger.ui.rendering.web.WeblogRequestMapper.handleRequest（）process
this request.
It parses the request url, and finds a certain XXXServlet to process this
request. So the XXXServlet will really start processing the business logic
about the request.
This part is mainly located in
org.apache.roller.weblogger.ui.rendering.servlet, focusing on weblog page
rendering system.
(2)If the request is not being processed, then it will pass in the last
filter- struts2. struts2.xml has mapped the action name to action class.
It will find a certain XXXActionClass to process the request. So XXXAction
Class will really start processing the business logic about the request.
This part mainly is located in org.apache.roller.weblogger.ui.struts2,
focusing on weblog admin and interface action, such as bookmark, category,
entry,.....
Great. I think it is right. aha?
Thanks a lot for your help. I really appreciate it.
Best regards,
Wuxia
On Sun, Feb 25, 2018 at 3:47 AM, Greg Huber <gr...@gmail.com> wrote:
> good write up!
>
> Cheers Greg
>
> On 24 February 2018 at 20:02, Dave <sn...@gmail.com> wrote:
>
> > Hi Wuxia Jin,
> >
> > Some answers below...
> >
> >
> > > The processing of an incoming request is right as what I said?
> >
> > Yes, that is mostly correct, but not all requests are handle by Struts.
> >
> > To understand how Roller works, you should also look at the web.xml file
> > and how it maps URL paths to Java classes.
> >
> > Also, understand that there are two parts of Roller:
> >
> > 1) the weblog editor and admin interface, which exists at the URL path
> > /roller-ui and is written using Struts and JSP pages (see the struts.xml
> > and tiles.xml to see how Struts is configured) and
> >
> > 2) the Roller weblog page rendering system, which uses a set of Servlets
> > which call the Velocity template engine to display weblog pages using
> > Velocity templates.
> >
> > In the web.xml there is a RequestMapping filter. If that filter sees a
> > request for a weblog page then it calls a servlet to display the weblog
> > page or weblog RSS feed (using Velocity).
> >
> > If the RequestMapper does not handle a request, then the next filter,
> which
> > is the Struts filter, will handle the request and determine which Struts
> > action is to be called.
> >
> >
> > > *2. From the structs, each "action" corresponds to a "action class".
> > Aslo,
> > > There is more than one action is processed by the same action class.*
> > > If so, *how does execute() distinguish the two different actions to
> > process
> > differently?*
> >
> > The BookmarkEdit action is called twice.
> >
> > First, it is called with no method name specified in the URL and the
> > execute() method returns INPUT, which tells struts to display the
> > ".BookmarkEdit" Tile which includes the BookmarkEdit.jsp page. That
> causes
> > the Bookmark Edit page to be displayed to the user.
> >
> > Second, when a user clicks the Save button then Bookmark edit action is
> > called again but this time with the save method specified in the URL (by
> a
> > !save notation). That means that the save() method gets called, and a new
> > bookmark is added or an existing bookmark is updated.
> >
> >
> > > (b) Another question is that, in class BookmarkEdit, there is "save()"
> > > method besides "myPrepare()" and "execute()".
> > > From the code,* I cannot clearly see how the save() method is called,
> or
> > > who will call save() method?*
> >
> > Yes, that is confusing and sort of a hack. There is a form parameter
> that
> > carries an action name of either "bookmarkAdd" or "bookmarkEdit" and
> there
> > is a method called isAdd() which looks at that parameter and decides
> > whether to add a new bookmark or update an existing bookmark.
> >
> > Hope that helps.
> >
> > Best regards,
> > Dave
> >
> >
> > On Sat, Feb 24, 2018 at 2:02 PM x86 wj <wj...@gmail.com> wrote:
> >
> > > hi Greg,
> > >
> > > *1. According to your explanation, I try to express the request
> > > processing. *
> > > When a request comes in:
> > > (1) Firstly, several filterings will filter the request.
> > > (2) Then, as you said, WeblogRequestMapper is the overall entry for
> > > processing all request. WeblogRequestMapper.handleRequest() will
> parse
> > the
> > > requesting url, then find the corresponding "Action name" to process
> the
> > > request.
> > > (3) After finding the "Action name", then corresponding Action Class
> will
> > > really process the business function. while the mapping from "action
> > name'
> > > to "action class" is specified in Struts.xml.
> > > (4) The 'Action class' will process the logic. It firstly runs
> > > its myPrepare() method, then call the execution() method.
> > > (5)After processing the execute() method, then continue the pass the
> > > several filterings.
> > >
> > > The processing of an incoming request is right as what I said?
> > >
> > > *2. From the structs, each "action" corresponds to a "action class".
> > Aslo,
> > > There is more than one action is processed by the same action class.*
> > > For example,
> > >
> > > <action name="bookmarkAdd"
> > > class="org.apache.roller.weblogger.ui.struts2.editor.
> > BookmarkEdit">
> > > <param name="actionName">bookmarkAdd</param>
> > > <param name="pageTitle">bookmarkForm.add.title</param>
> > > <result name="input" type="tiles">.BookmarkEdit</result>
> > > <result name="success" type="chain">bookmarks</result>
> > > <result name="error" type="chain">bookmarks</result>
> > > </action>
> > >
> > > <action name="bookmarkEdit"
> > > class="org.apache.roller.weblogger.ui.struts2.editor.
> > BookmarkEdit">
> > > <param name="actionName">bookmarkEdit</param>
> > > <param name="pageTitle">bookmarkForm.edit.title</param>
> > > <result name="input" type="tiles">.BookmarkEdit</result>
> > > <result name="success" type="chain">bookmarks</result>
> > > <result name="cancel" type="redirectAction">
> > > <param name="actionName">bookmarks</param>
> > > <param name="weblog">${weblog}</param>
> > > <param name="folderId">${folderId}</param>
> > > </result>
> > > <result name="error" type="chain">bookmarkEdit</result>
> > > </action>
> > >
> > > (a) we can see "bookmarkAdd" and "bookmarkEdit' the two actions are
> both
> > > processed by "org.apache.roller.weblogger.ui.struts2.editor.
> > BookmarkEdit".
> > > But there is only one execute() method in class BookmarkEdit. It means
> > > "bookmarkAdd' and "bookmarkEdit" are processed by the same execution()
> > > method?
> > > If so, *how does execute() distinguish the two different actions to
> > process
> > > differently?*
> > >
> > > (b) Another question is that, in class BookmarkEdit, there is "save()"
> > > method besides "myPrepare()" and "execute()".
> > > From the code,* I cannot clearly see how the save() method is called,
> or
> > > who will call save() method?*
> > >
> > >
> > >
> > > I am new to structs and roller. A lot of details I would like to ask
> and
> > > hope make it clear.
> > > Thank you for your help.
> > > Best regards,
> > > Wuxia Jin
> > >
> > >
> > > On Sat, Feb 24, 2018 at 12:07 PM, Greg Huber <gr...@gmail.com>
> > wrote:
> > >
> > > > .....should be WeblogRequestMapper
> > > >
> > > > Cheers Greg
> > > >
> > > > On 24 February 2018 at 04:39, x86 wj <wj...@gmail.com> wrote:
> > > >
> > > > > Roller is in a web architecture of "presentation -> business logic
> ->
> > > > > persistent layer". But the project is complex. From the source
> code,
> > I
> > > > have
> > > > > no idea which packages(or classes) are responsible for the
> > controller.
> > > > The
> > > > > following will list an example to express my meaning.
> > > > >
> > > > > For example, Jpetstore is a small project with only 24 classes.
> > > > > https://github.com/mybatis/jpetstore-6/blob/master/src/
> > > > > main/java/org/mybatis/jpetstore/web/actions/OrderActionBean.java
> > > > >
> > > > > This link shows that OrderActionBean is one of the controller class
> > in
> > > > > web.action package. OrderActionBean.listOrders is one function
> entry
> > > > > provided by system.
> > > > >
> > > > > So, I would like to know, in roller,* where can I find the similar
> > > > > 'controllerClass.method()' that clearly present function's entry*.
> > Can
> > > > you
> > > > > give me some example?
> > > > >
> > > > > Thanks a lot for your time. I really need your help.
> > > > > Best regards,
> > > > > Wuxia Jin
> > > > >
> > > >
> > >
> >
>
Re: where can i find the controller class or package
Posted by Greg Huber <gr...@gmail.com>.
good write up!
Cheers Greg
On 24 February 2018 at 20:02, Dave <sn...@gmail.com> wrote:
> Hi Wuxia Jin,
>
> Some answers below...
>
>
> > The processing of an incoming request is right as what I said?
>
> Yes, that is mostly correct, but not all requests are handle by Struts.
>
> To understand how Roller works, you should also look at the web.xml file
> and how it maps URL paths to Java classes.
>
> Also, understand that there are two parts of Roller:
>
> 1) the weblog editor and admin interface, which exists at the URL path
> /roller-ui and is written using Struts and JSP pages (see the struts.xml
> and tiles.xml to see how Struts is configured) and
>
> 2) the Roller weblog page rendering system, which uses a set of Servlets
> which call the Velocity template engine to display weblog pages using
> Velocity templates.
>
> In the web.xml there is a RequestMapping filter. If that filter sees a
> request for a weblog page then it calls a servlet to display the weblog
> page or weblog RSS feed (using Velocity).
>
> If the RequestMapper does not handle a request, then the next filter, which
> is the Struts filter, will handle the request and determine which Struts
> action is to be called.
>
>
> > *2. From the structs, each "action" corresponds to a "action class".
> Aslo,
> > There is more than one action is processed by the same action class.*
> > If so, *how does execute() distinguish the two different actions to
> process
> differently?*
>
> The BookmarkEdit action is called twice.
>
> First, it is called with no method name specified in the URL and the
> execute() method returns INPUT, which tells struts to display the
> ".BookmarkEdit" Tile which includes the BookmarkEdit.jsp page. That causes
> the Bookmark Edit page to be displayed to the user.
>
> Second, when a user clicks the Save button then Bookmark edit action is
> called again but this time with the save method specified in the URL (by a
> !save notation). That means that the save() method gets called, and a new
> bookmark is added or an existing bookmark is updated.
>
>
> > (b) Another question is that, in class BookmarkEdit, there is "save()"
> > method besides "myPrepare()" and "execute()".
> > From the code,* I cannot clearly see how the save() method is called, or
> > who will call save() method?*
>
> Yes, that is confusing and sort of a hack. There is a form parameter that
> carries an action name of either "bookmarkAdd" or "bookmarkEdit" and there
> is a method called isAdd() which looks at that parameter and decides
> whether to add a new bookmark or update an existing bookmark.
>
> Hope that helps.
>
> Best regards,
> Dave
>
>
> On Sat, Feb 24, 2018 at 2:02 PM x86 wj <wj...@gmail.com> wrote:
>
> > hi Greg,
> >
> > *1. According to your explanation, I try to express the request
> > processing. *
> > When a request comes in:
> > (1) Firstly, several filterings will filter the request.
> > (2) Then, as you said, WeblogRequestMapper is the overall entry for
> > processing all request. WeblogRequestMapper.handleRequest() will parse
> the
> > requesting url, then find the corresponding "Action name" to process the
> > request.
> > (3) After finding the "Action name", then corresponding Action Class will
> > really process the business function. while the mapping from "action
> name'
> > to "action class" is specified in Struts.xml.
> > (4) The 'Action class' will process the logic. It firstly runs
> > its myPrepare() method, then call the execution() method.
> > (5)After processing the execute() method, then continue the pass the
> > several filterings.
> >
> > The processing of an incoming request is right as what I said?
> >
> > *2. From the structs, each "action" corresponds to a "action class".
> Aslo,
> > There is more than one action is processed by the same action class.*
> > For example,
> >
> > <action name="bookmarkAdd"
> > class="org.apache.roller.weblogger.ui.struts2.editor.
> BookmarkEdit">
> > <param name="actionName">bookmarkAdd</param>
> > <param name="pageTitle">bookmarkForm.add.title</param>
> > <result name="input" type="tiles">.BookmarkEdit</result>
> > <result name="success" type="chain">bookmarks</result>
> > <result name="error" type="chain">bookmarks</result>
> > </action>
> >
> > <action name="bookmarkEdit"
> > class="org.apache.roller.weblogger.ui.struts2.editor.
> BookmarkEdit">
> > <param name="actionName">bookmarkEdit</param>
> > <param name="pageTitle">bookmarkForm.edit.title</param>
> > <result name="input" type="tiles">.BookmarkEdit</result>
> > <result name="success" type="chain">bookmarks</result>
> > <result name="cancel" type="redirectAction">
> > <param name="actionName">bookmarks</param>
> > <param name="weblog">${weblog}</param>
> > <param name="folderId">${folderId}</param>
> > </result>
> > <result name="error" type="chain">bookmarkEdit</result>
> > </action>
> >
> > (a) we can see "bookmarkAdd" and "bookmarkEdit' the two actions are both
> > processed by "org.apache.roller.weblogger.ui.struts2.editor.
> BookmarkEdit".
> > But there is only one execute() method in class BookmarkEdit. It means
> > "bookmarkAdd' and "bookmarkEdit" are processed by the same execution()
> > method?
> > If so, *how does execute() distinguish the two different actions to
> process
> > differently?*
> >
> > (b) Another question is that, in class BookmarkEdit, there is "save()"
> > method besides "myPrepare()" and "execute()".
> > From the code,* I cannot clearly see how the save() method is called, or
> > who will call save() method?*
> >
> >
> >
> > I am new to structs and roller. A lot of details I would like to ask and
> > hope make it clear.
> > Thank you for your help.
> > Best regards,
> > Wuxia Jin
> >
> >
> > On Sat, Feb 24, 2018 at 12:07 PM, Greg Huber <gr...@gmail.com>
> wrote:
> >
> > > .....should be WeblogRequestMapper
> > >
> > > Cheers Greg
> > >
> > > On 24 February 2018 at 04:39, x86 wj <wj...@gmail.com> wrote:
> > >
> > > > Roller is in a web architecture of "presentation -> business logic ->
> > > > persistent layer". But the project is complex. From the source code,
> I
> > > have
> > > > no idea which packages(or classes) are responsible for the
> controller.
> > > The
> > > > following will list an example to express my meaning.
> > > >
> > > > For example, Jpetstore is a small project with only 24 classes.
> > > > https://github.com/mybatis/jpetstore-6/blob/master/src/
> > > > main/java/org/mybatis/jpetstore/web/actions/OrderActionBean.java
> > > >
> > > > This link shows that OrderActionBean is one of the controller class
> in
> > > > web.action package. OrderActionBean.listOrders is one function entry
> > > > provided by system.
> > > >
> > > > So, I would like to know, in roller,* where can I find the similar
> > > > 'controllerClass.method()' that clearly present function's entry*.
> Can
> > > you
> > > > give me some example?
> > > >
> > > > Thanks a lot for your time. I really need your help.
> > > > Best regards,
> > > > Wuxia Jin
> > > >
> > >
> >
>
Re: where can i find the controller class or package
Posted by x86 wj <wj...@gmail.com>.
@Dave,
Great!
Your explanation is very clear and in detail. It really helps me a lot.
I think I understand the overall process. : )
Thanks for your time.
Best regards,
Wuxia Jin
On Sat, Feb 24, 2018 at 3:02 PM, Dave <sn...@gmail.com> wrote:
> Hi Wuxia Jin,
>
> Some answers below...
>
>
> > The processing of an incoming request is right as what I said?
>
> Yes, that is mostly correct, but not all requests are handle by Struts.
>
> To understand how Roller works, you should also look at the web.xml file
> and how it maps URL paths to Java classes.
>
> Also, understand that there are two parts of Roller:
>
> 1) the weblog editor and admin interface, which exists at the URL path
> /roller-ui and is written using Struts and JSP pages (see the struts.xml
> and tiles.xml to see how Struts is configured) and
>
> 2) the Roller weblog page rendering system, which uses a set of Servlets
> which call the Velocity template engine to display weblog pages using
> Velocity templates.
>
> In the web.xml there is a RequestMapping filter. If that filter sees a
> request for a weblog page then it calls a servlet to display the weblog
> page or weblog RSS feed (using Velocity).
>
> If the RequestMapper does not handle a request, then the next filter, which
> is the Struts filter, will handle the request and determine which Struts
> action is to be called.
>
>
> > *2. From the structs, each "action" corresponds to a "action class".
> Aslo,
> > There is more than one action is processed by the same action class.*
> > If so, *how does execute() distinguish the two different actions to
> process
> differently?*
>
> The BookmarkEdit action is called twice.
>
> First, it is called with no method name specified in the URL and the
> execute() method returns INPUT, which tells struts to display the
> ".BookmarkEdit" Tile which includes the BookmarkEdit.jsp page. That causes
> the Bookmark Edit page to be displayed to the user.
>
> Second, when a user clicks the Save button then Bookmark edit action is
> called again but this time with the save method specified in the URL (by a
> !save notation). That means that the save() method gets called, and a new
> bookmark is added or an existing bookmark is updated.
>
>
> > (b) Another question is that, in class BookmarkEdit, there is "save()"
> > method besides "myPrepare()" and "execute()".
> > From the code,* I cannot clearly see how the save() method is called, or
> > who will call save() method?*
>
> Yes, that is confusing and sort of a hack. There is a form parameter that
> carries an action name of either "bookmarkAdd" or "bookmarkEdit" and there
> is a method called isAdd() which looks at that parameter and decides
> whether to add a new bookmark or update an existing bookmark.
>
> Hope that helps.
>
> Best regards,
> Dave
>
>
> On Sat, Feb 24, 2018 at 2:02 PM x86 wj <wj...@gmail.com> wrote:
>
> > hi Greg,
> >
> > *1. According to your explanation, I try to express the request
> > processing. *
> > When a request comes in:
> > (1) Firstly, several filterings will filter the request.
> > (2) Then, as you said, WeblogRequestMapper is the overall entry for
> > processing all request. WeblogRequestMapper.handleRequest() will parse
> the
> > requesting url, then find the corresponding "Action name" to process the
> > request.
> > (3) After finding the "Action name", then corresponding Action Class will
> > really process the business function. while the mapping from "action
> name'
> > to "action class" is specified in Struts.xml.
> > (4) The 'Action class' will process the logic. It firstly runs
> > its myPrepare() method, then call the execution() method.
> > (5)After processing the execute() method, then continue the pass the
> > several filterings.
> >
> > The processing of an incoming request is right as what I said?
> >
> > *2. From the structs, each "action" corresponds to a "action class".
> Aslo,
> > There is more than one action is processed by the same action class.*
> > For example,
> >
> > <action name="bookmarkAdd"
> > class="org.apache.roller.weblogger.ui.struts2.editor.
> BookmarkEdit">
> > <param name="actionName">bookmarkAdd</param>
> > <param name="pageTitle">bookmarkForm.add.title</param>
> > <result name="input" type="tiles">.BookmarkEdit</result>
> > <result name="success" type="chain">bookmarks</result>
> > <result name="error" type="chain">bookmarks</result>
> > </action>
> >
> > <action name="bookmarkEdit"
> > class="org.apache.roller.weblogger.ui.struts2.editor.
> BookmarkEdit">
> > <param name="actionName">bookmarkEdit</param>
> > <param name="pageTitle">bookmarkForm.edit.title</param>
> > <result name="input" type="tiles">.BookmarkEdit</result>
> > <result name="success" type="chain">bookmarks</result>
> > <result name="cancel" type="redirectAction">
> > <param name="actionName">bookmarks</param>
> > <param name="weblog">${weblog}</param>
> > <param name="folderId">${folderId}</param>
> > </result>
> > <result name="error" type="chain">bookmarkEdit</result>
> > </action>
> >
> > (a) we can see "bookmarkAdd" and "bookmarkEdit' the two actions are both
> > processed by "org.apache.roller.weblogger.ui.struts2.editor.
> BookmarkEdit".
> > But there is only one execute() method in class BookmarkEdit. It means
> > "bookmarkAdd' and "bookmarkEdit" are processed by the same execution()
> > method?
> > If so, *how does execute() distinguish the two different actions to
> process
> > differently?*
> >
> > (b) Another question is that, in class BookmarkEdit, there is "save()"
> > method besides "myPrepare()" and "execute()".
> > From the code,* I cannot clearly see how the save() method is called, or
> > who will call save() method?*
> >
> >
> >
> > I am new to structs and roller. A lot of details I would like to ask and
> > hope make it clear.
> > Thank you for your help.
> > Best regards,
> > Wuxia Jin
> >
> >
> > On Sat, Feb 24, 2018 at 12:07 PM, Greg Huber <gr...@gmail.com>
> wrote:
> >
> > > .....should be WeblogRequestMapper
> > >
> > > Cheers Greg
> > >
> > > On 24 February 2018 at 04:39, x86 wj <wj...@gmail.com> wrote:
> > >
> > > > Roller is in a web architecture of "presentation -> business logic ->
> > > > persistent layer". But the project is complex. From the source code,
> I
> > > have
> > > > no idea which packages(or classes) are responsible for the
> controller.
> > > The
> > > > following will list an example to express my meaning.
> > > >
> > > > For example, Jpetstore is a small project with only 24 classes.
> > > > https://github.com/mybatis/jpetstore-6/blob/master/src/
> > > > main/java/org/mybatis/jpetstore/web/actions/OrderActionBean.java
> > > >
> > > > This link shows that OrderActionBean is one of the controller class
> in
> > > > web.action package. OrderActionBean.listOrders is one function entry
> > > > provided by system.
> > > >
> > > > So, I would like to know, in roller,* where can I find the similar
> > > > 'controllerClass.method()' that clearly present function's entry*.
> Can
> > > you
> > > > give me some example?
> > > >
> > > > Thanks a lot for your time. I really need your help.
> > > > Best regards,
> > > > Wuxia Jin
> > > >
> > >
> >
>
Re: where can i find the controller class or package
Posted by Dave <sn...@gmail.com>.
Hi Wuxia Jin,
Some answers below...
> The processing of an incoming request is right as what I said?
Yes, that is mostly correct, but not all requests are handle by Struts.
To understand how Roller works, you should also look at the web.xml file
and how it maps URL paths to Java classes.
Also, understand that there are two parts of Roller:
1) the weblog editor and admin interface, which exists at the URL path
/roller-ui and is written using Struts and JSP pages (see the struts.xml
and tiles.xml to see how Struts is configured) and
2) the Roller weblog page rendering system, which uses a set of Servlets
which call the Velocity template engine to display weblog pages using
Velocity templates.
In the web.xml there is a RequestMapping filter. If that filter sees a
request for a weblog page then it calls a servlet to display the weblog
page or weblog RSS feed (using Velocity).
If the RequestMapper does not handle a request, then the next filter, which
is the Struts filter, will handle the request and determine which Struts
action is to be called.
> *2. From the structs, each "action" corresponds to a "action class".
Aslo,
> There is more than one action is processed by the same action class.*
> If so, *how does execute() distinguish the two different actions to
process
differently?*
The BookmarkEdit action is called twice.
First, it is called with no method name specified in the URL and the
execute() method returns INPUT, which tells struts to display the
".BookmarkEdit" Tile which includes the BookmarkEdit.jsp page. That causes
the Bookmark Edit page to be displayed to the user.
Second, when a user clicks the Save button then Bookmark edit action is
called again but this time with the save method specified in the URL (by a
!save notation). That means that the save() method gets called, and a new
bookmark is added or an existing bookmark is updated.
> (b) Another question is that, in class BookmarkEdit, there is "save()"
> method besides "myPrepare()" and "execute()".
> From the code,* I cannot clearly see how the save() method is called, or
> who will call save() method?*
Yes, that is confusing and sort of a hack. There is a form parameter that
carries an action name of either "bookmarkAdd" or "bookmarkEdit" and there
is a method called isAdd() which looks at that parameter and decides
whether to add a new bookmark or update an existing bookmark.
Hope that helps.
Best regards,
Dave
On Sat, Feb 24, 2018 at 2:02 PM x86 wj <wj...@gmail.com> wrote:
> hi Greg,
>
> *1. According to your explanation, I try to express the request
> processing. *
> When a request comes in:
> (1) Firstly, several filterings will filter the request.
> (2) Then, as you said, WeblogRequestMapper is the overall entry for
> processing all request. WeblogRequestMapper.handleRequest() will parse the
> requesting url, then find the corresponding "Action name" to process the
> request.
> (3) After finding the "Action name", then corresponding Action Class will
> really process the business function. while the mapping from "action name'
> to "action class" is specified in Struts.xml.
> (4) The 'Action class' will process the logic. It firstly runs
> its myPrepare() method, then call the execution() method.
> (5)After processing the execute() method, then continue the pass the
> several filterings.
>
> The processing of an incoming request is right as what I said?
>
> *2. From the structs, each "action" corresponds to a "action class". Aslo,
> There is more than one action is processed by the same action class.*
> For example,
>
> <action name="bookmarkAdd"
> class="org.apache.roller.weblogger.ui.struts2.editor.BookmarkEdit">
> <param name="actionName">bookmarkAdd</param>
> <param name="pageTitle">bookmarkForm.add.title</param>
> <result name="input" type="tiles">.BookmarkEdit</result>
> <result name="success" type="chain">bookmarks</result>
> <result name="error" type="chain">bookmarks</result>
> </action>
>
> <action name="bookmarkEdit"
> class="org.apache.roller.weblogger.ui.struts2.editor.BookmarkEdit">
> <param name="actionName">bookmarkEdit</param>
> <param name="pageTitle">bookmarkForm.edit.title</param>
> <result name="input" type="tiles">.BookmarkEdit</result>
> <result name="success" type="chain">bookmarks</result>
> <result name="cancel" type="redirectAction">
> <param name="actionName">bookmarks</param>
> <param name="weblog">${weblog}</param>
> <param name="folderId">${folderId}</param>
> </result>
> <result name="error" type="chain">bookmarkEdit</result>
> </action>
>
> (a) we can see "bookmarkAdd" and "bookmarkEdit' the two actions are both
> processed by "org.apache.roller.weblogger.ui.struts2.editor.BookmarkEdit".
> But there is only one execute() method in class BookmarkEdit. It means
> "bookmarkAdd' and "bookmarkEdit" are processed by the same execution()
> method?
> If so, *how does execute() distinguish the two different actions to process
> differently?*
>
> (b) Another question is that, in class BookmarkEdit, there is "save()"
> method besides "myPrepare()" and "execute()".
> From the code,* I cannot clearly see how the save() method is called, or
> who will call save() method?*
>
>
>
> I am new to structs and roller. A lot of details I would like to ask and
> hope make it clear.
> Thank you for your help.
> Best regards,
> Wuxia Jin
>
>
> On Sat, Feb 24, 2018 at 12:07 PM, Greg Huber <gr...@gmail.com> wrote:
>
> > .....should be WeblogRequestMapper
> >
> > Cheers Greg
> >
> > On 24 February 2018 at 04:39, x86 wj <wj...@gmail.com> wrote:
> >
> > > Roller is in a web architecture of "presentation -> business logic ->
> > > persistent layer". But the project is complex. From the source code, I
> > have
> > > no idea which packages(or classes) are responsible for the controller.
> > The
> > > following will list an example to express my meaning.
> > >
> > > For example, Jpetstore is a small project with only 24 classes.
> > > https://github.com/mybatis/jpetstore-6/blob/master/src/
> > > main/java/org/mybatis/jpetstore/web/actions/OrderActionBean.java
> > >
> > > This link shows that OrderActionBean is one of the controller class in
> > > web.action package. OrderActionBean.listOrders is one function entry
> > > provided by system.
> > >
> > > So, I would like to know, in roller,* where can I find the similar
> > > 'controllerClass.method()' that clearly present function's entry*. Can
> > you
> > > give me some example?
> > >
> > > Thanks a lot for your time. I really need your help.
> > > Best regards,
> > > Wuxia Jin
> > >
> >
>
Re: where can i find the controller class or package
Posted by x86 wj <wj...@gmail.com>.
hi Greg,
*1. According to your explanation, I try to express the request
processing. *
When a request comes in:
(1) Firstly, several filterings will filter the request.
(2) Then, as you said, WeblogRequestMapper is the overall entry for
processing all request. WeblogRequestMapper.handleRequest() will parse the
requesting url, then find the corresponding "Action name" to process the
request.
(3) After finding the "Action name", then corresponding Action Class will
really process the business function. while the mapping from "action name'
to "action class" is specified in Struts.xml.
(4) The 'Action class' will process the logic. It firstly runs
its myPrepare() method, then call the execution() method.
(5)After processing the execute() method, then continue the pass the
several filterings.
The processing of an incoming request is right as what I said?
*2. From the structs, each "action" corresponds to a "action class". Aslo,
There is more than one action is processed by the same action class.*
For example,
<action name="bookmarkAdd"
class="org.apache.roller.weblogger.ui.struts2.editor.BookmarkEdit">
<param name="actionName">bookmarkAdd</param>
<param name="pageTitle">bookmarkForm.add.title</param>
<result name="input" type="tiles">.BookmarkEdit</result>
<result name="success" type="chain">bookmarks</result>
<result name="error" type="chain">bookmarks</result>
</action>
<action name="bookmarkEdit"
class="org.apache.roller.weblogger.ui.struts2.editor.BookmarkEdit">
<param name="actionName">bookmarkEdit</param>
<param name="pageTitle">bookmarkForm.edit.title</param>
<result name="input" type="tiles">.BookmarkEdit</result>
<result name="success" type="chain">bookmarks</result>
<result name="cancel" type="redirectAction">
<param name="actionName">bookmarks</param>
<param name="weblog">${weblog}</param>
<param name="folderId">${folderId}</param>
</result>
<result name="error" type="chain">bookmarkEdit</result>
</action>
(a) we can see "bookmarkAdd" and "bookmarkEdit' the two actions are both
processed by "org.apache.roller.weblogger.ui.struts2.editor.BookmarkEdit".
But there is only one execute() method in class BookmarkEdit. It means
"bookmarkAdd' and "bookmarkEdit" are processed by the same execution()
method?
If so, *how does execute() distinguish the two different actions to process
differently?*
(b) Another question is that, in class BookmarkEdit, there is "save()"
method besides "myPrepare()" and "execute()".
From the code,* I cannot clearly see how the save() method is called, or
who will call save() method?*
I am new to structs and roller. A lot of details I would like to ask and
hope make it clear.
Thank you for your help.
Best regards,
Wuxia Jin
On Sat, Feb 24, 2018 at 12:07 PM, Greg Huber <gr...@gmail.com> wrote:
> .....should be WeblogRequestMapper
>
> Cheers Greg
>
> On 24 February 2018 at 04:39, x86 wj <wj...@gmail.com> wrote:
>
> > Roller is in a web architecture of "presentation -> business logic ->
> > persistent layer". But the project is complex. From the source code, I
> have
> > no idea which packages(or classes) are responsible for the controller.
> The
> > following will list an example to express my meaning.
> >
> > For example, Jpetstore is a small project with only 24 classes.
> > https://github.com/mybatis/jpetstore-6/blob/master/src/
> > main/java/org/mybatis/jpetstore/web/actions/OrderActionBean.java
> >
> > This link shows that OrderActionBean is one of the controller class in
> > web.action package. OrderActionBean.listOrders is one function entry
> > provided by system.
> >
> > So, I would like to know, in roller,* where can I find the similar
> > 'controllerClass.method()' that clearly present function's entry*. Can
> you
> > give me some example?
> >
> > Thanks a lot for your time. I really need your help.
> > Best regards,
> > Wuxia Jin
> >
>
Re: where can i find the controller class or package
Posted by Greg Huber <gr...@gmail.com>.
.....should be WeblogRequestMapper
Cheers Greg
On 24 February 2018 at 04:39, x86 wj <wj...@gmail.com> wrote:
> Roller is in a web architecture of "presentation -> business logic ->
> persistent layer". But the project is complex. From the source code, I have
> no idea which packages(or classes) are responsible for the controller. The
> following will list an example to express my meaning.
>
> For example, Jpetstore is a small project with only 24 classes.
> https://github.com/mybatis/jpetstore-6/blob/master/src/
> main/java/org/mybatis/jpetstore/web/actions/OrderActionBean.java
>
> This link shows that OrderActionBean is one of the controller class in
> web.action package. OrderActionBean.listOrders is one function entry
> provided by system.
>
> So, I would like to know, in roller,* where can I find the similar
> 'controllerClass.method()' that clearly present function's entry*. Can you
> give me some example?
>
> Thanks a lot for your time. I really need your help.
> Best regards,
> Wuxia Jin
>
Re: where can i find the controller class or package
Posted by Greg Huber <gr...@gmail.com>.
The back office is a struts application (struts.xml), whilst on the front
presentation tier is custom implementation. The nearest thing to a
controller I guess would be
org/apache/roller/weblogger/ui/rendering/WebsiteRequestMapper class.
Cheers Greg
On 24 February 2018 at 04:39, x86 wj <wj...@gmail.com> wrote:
> Roller is in a web architecture of "presentation -> business logic ->
> persistent layer". But the project is complex. From the source code, I have
> no idea which packages(or classes) are responsible for the controller. The
> following will list an example to express my meaning.
>
> For example, Jpetstore is a small project with only 24 classes.
> https://github.com/mybatis/jpetstore-6/blob/master/src/
> main/java/org/mybatis/jpetstore/web/actions/OrderActionBean.java
>
> This link shows that OrderActionBean is one of the controller class in
> web.action package. OrderActionBean.listOrders is one function entry
> provided by system.
>
> So, I would like to know, in roller,* where can I find the similar
> 'controllerClass.method()' that clearly present function's entry*. Can you
> give me some example?
>
> Thanks a lot for your time. I really need your help.
> Best regards,
> Wuxia Jin
>