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Posted to users@cocoon.apache.org by Ho...@seitenbau.com on 2004/05/19 16:14:55 UTC
Order of processing in sitemap with call of flow
Hi,
I'm using Cocoon 2.1.5-dev (snapshot 2004-04-16)
I have a sitemap like this:
----------------- snip
---------------------------------------------------------
[...]
<map:match pattern="content">
<map:act type="auth-protect">
<map:parameter name="handler" value="portalhandler"/>
<map:generate type="file"
src="modules/content/inhalt{request-param:content}.xml" label="content" />
<map:transform type="session" label="transform-session"/>
<map:select type="request-parameter">
<map:parameter name="attribute-name" value="content"/>
[...]
<map:when test="_messages">
<!-- put in the select statement -->
<map:transform src="modules/messages/messagesSelect.xsl"/>
<map:transform type="sql">
<map:parameter name="use-connection"
value="myPortalStructure"/>
<map:parameter name="show-nr-of-rows" value="true"/>
<map:parameter name="clob-encoding" value="UTF-8"/>
<map:parameter name="column-case" value="preserve"/>
<map:parameter name="userid"
value="{session-context:authentication/authentication/data/userid}"/>
</map:transform>
<!-- put the row-state in the rows tag -->
<map:transform src="modules/messages/rowstate.xsl"/>
<!-- write the result to the session for use in the flowscript
-->
<map:transform type="writeDOMsession">
<map:parameter name="dom-name" value="DBResult"/>
<map:parameter name="dom-root-element" value="document"/>
</map:transform>
<map:select type="request-method">
<map:when test="GET">
<map:call function="handleForm">
<map:parameter name="function" value="updnachrichten"/>
<map:parameter name="form-definition"
value="forms/messagelist.xml"/>
<map:parameter name="bindingURI"
value="forms/messageliste_bind.xml"/>
</map:call>
</map:when>
<map:when test="POST">
<map:call continuation="{request-param:continuation-id}"/>
</map:when>
</map:select>
</map:when>
[...]
----------------- /snip
---------------------------------------------------------
and a flow script like this:
----------------- snip
---------------------------------------------------------
cocoon.load("resource://org/apache/cocoon/forms/flow/javascript/Form.js");
function updnachrichten(form) {
// get the document from the session
var document = cocoon.session.getAttribute("DBResult");
// TODO: this is only, because the first time the function
// is called, the document is null.
if (null == document) {
form.showForm("nachrichtenliste-display-pipeline");
}
// bind the document data to the form
form.load(document);
// show the form to the user until it is validated successfully
form.showForm("nachrichtenliste-display-pipeline");
// bind the form's data back to the document
form.save(document);
// write document back to the session for next pipeline
cocoon.session.setAttribute("nachrichtenlisteDocument", document);
// send to pipeline, which saves data in db
cocoon.sendPage("nachrichten-save-pipeline");
}
----------------- /snip
---------------------------------------------------------
I wanted to use the result from the SQLTransformer (set in the Session
with the WriteDOMSession) in my flow script, but realized, that first the
flow script is executed and then the rest of the <map:when
test="_messages">-part of the pipeline.
(If I make the request a second time, the result from the query of the
request before is then in the session.)
Does anyone know why this is or how I can force cocoon to process my
pipeline sequentially?
many thanks in advance,
Nicole
Re: Order of processing in sitemap with call of flow
Posted by Nicole Hochleiter <ho...@seitenbau.com>.
Thanks a lot!
I didn't know about the "org.apache.cocoon.components.flow.util.PipelineUtil"
and how it could help me in a Flowscript. Also it is good to get advices about
best practice in controlling page flow.
Now it works fine and maybe I can use this hint in other places, too.
TNX again,
Nicole
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Re: Order of processing in sitemap with call of flow
Posted by Joerg Heinicke <jo...@gmx.de>.
The most important disadvantages of such monolithic sitemaps are loosing
the overview over the sitemap flow and the little reusability.
The flowscript is for controlling page flow. So you should delegate the
control immediately to it, not only after already having done some
actions in the sitemap as there might be cases where this shall not happen.
In your function you can do then something like:
function updnachrichten(form) {
// get the document from the pipeline
var pipelineUtil =
cocoon.createObject(Packages.org.apache.cocoon.components.flow.util.PipelineUtil);
var document = pipelineUtil.processToDOM("DBResult-pipeline");
cocoon.disposeObject(pipelineUtil);
// bind the document data to the form
form.load(document);
// show the form to the user until it is validated successfully
form.showForm("nachrichtenliste-display-pipeline");
// bind the form's data back to the document
form.save(document);
// write document back to the session for next pipeline
cocoon.session.setAttribute("nachrichtenlisteDocument", document);
// send to pipeline, which saves data in db
cocoon.sendPage("nachrichten-save-pipeline");
}
Also for storing the result there should be no need to use the session.
sendPage() accepts as second param an arbitrary object, which you can
grab later on from the flow context. I don't know how you store the
result in the db, but using the JXTemplateGenerator (to easily,
transparently grab the document) and the SQLTransformer might be a solution.
At the end the sitemap becomes much less monolithic and more readable
and reusable as you have little pipelines. And you separate the flow
into the flow script.
Joerg
On 19.05.2004 16:14, Hochleiter@seitenbau.com wrote:
> Hi,
> I'm using Cocoon 2.1.5-dev (snapshot 2004-04-16)
> I have a sitemap like this:
> ----------------- snip
> ---------------------------------------------------------
> [...]
> <map:match pattern="content">
> <map:act type="auth-protect">
> <map:parameter name="handler" value="portalhandler"/>
> <map:generate type="file"
> src="modules/content/inhalt{request-param:content}.xml" label="content" />
> <map:transform type="session" label="transform-session"/>
>
> <map:select type="request-parameter">
> <map:parameter name="attribute-name" value="content"/>
>
> [...]
>
> <map:when test="_messages">
> <!-- put in the select statement -->
> <map:transform src="modules/messages/messagesSelect.xsl"/>
> <map:transform type="sql">
> <map:parameter name="use-connection"
> value="myPortalStructure"/>
> <map:parameter name="show-nr-of-rows" value="true"/>
> <map:parameter name="clob-encoding" value="UTF-8"/>
> <map:parameter name="column-case" value="preserve"/>
> <map:parameter name="userid"
> value="{session-context:authentication/authentication/data/userid}"/>
> </map:transform>
> <!-- put the row-state in the rows tag -->
> <map:transform src="modules/messages/rowstate.xsl"/>
> <!-- write the result to the session for use in the flowscript
> -->
> <map:transform type="writeDOMsession">
> <map:parameter name="dom-name" value="DBResult"/>
> <map:parameter name="dom-root-element" value="document"/>
> </map:transform>
>
> <map:select type="request-method">
> <map:when test="GET">
> <map:call function="handleForm">
> <map:parameter name="function" value="updnachrichten"/>
> <map:parameter name="form-definition"
> value="forms/messagelist.xml"/>
> <map:parameter name="bindingURI"
> value="forms/messageliste_bind.xml"/>
> </map:call>
> </map:when>
> <map:when test="POST">
> <map:call continuation="{request-param:continuation-id}"/>
> </map:when>
> </map:select>
>
> </map:when>
>
>
> [...]
> ----------------- /snip
> ---------------------------------------------------------
>
> and a flow script like this:
> ----------------- snip
> ---------------------------------------------------------
> cocoon.load("resource://org/apache/cocoon/forms/flow/javascript/Form.js");
>
> function updnachrichten(form) {
>
> // get the document from the session
> var document = cocoon.session.getAttribute("DBResult");
>
> // TODO: this is only, because the first time the function
> // is called, the document is null.
> if (null == document) {
> form.showForm("nachrichtenliste-display-pipeline");
> }
>
> // bind the document data to the form
> form.load(document);
>
> // show the form to the user until it is validated successfully
> form.showForm("nachrichtenliste-display-pipeline");
>
> // bind the form's data back to the document
> form.save(document);
>
> // write document back to the session for next pipeline
> cocoon.session.setAttribute("nachrichtenlisteDocument", document);
>
> // send to pipeline, which saves data in db
> cocoon.sendPage("nachrichten-save-pipeline");
> }
> ----------------- /snip
> ---------------------------------------------------------
>
> I wanted to use the result from the SQLTransformer (set in the Session
> with the WriteDOMSession) in my flow script, but realized, that first the
> flow script is executed and then the rest of the <map:when
> test="_messages">-part of the pipeline.
> (If I make the request a second time, the result from the query of the
> request before is then in the session.)
>
> Does anyone know why this is or how I can force cocoon to process my
> pipeline sequentially?
>
> many thanks in advance,
> Nicole
>
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