I have a datatable with a commandLink in each row, to get a file from the database.
The code I have for the commandLink is:
<p:commandLink title="download file" styleClass="fa fa-lg fa-download output-button" actionListener="#{fileSearchPageBean.getFileToDownload(result.id)}">
<p:fileDownload value="#{fileSearchPageBean.file}" />
</p:commandLink>
The function getFileToDownload in the page bean makes the query to get the file and puts it in the file variable, that is in the fileDownload.
What is happening is that when the datatable is loaded, it makes the queries to get all the files for all the rows. The thing is I just want to make the query and get a specific file when the link for that file is clicked, what am I doing wrong?
Thanks!
Related
I'm using Primefaces TabView, CommandButton and FileDownload to download a log file. Once the log file has been downloaded, I want to offer the option to delete the contents of the log from the server.
Initially the Delete Log File Button (deleteEventLogButton) is disabled and has a custom caption stating "Delete Logs - Export Required". Once the log has been exported, the button should be enabled and the caption should state "Delete Logs".
The problem that I'm having is that the Delete Log File Button is still disabled and the caption reads "Delete Logs - Export Required" even after the Export event completes successfully.
My guess is that the exportEventLogButton->Update="deleteEventLogButton" is being called before the fileDownload value.
Once I've exported the logs, I can hit 'F5' and refresh the page and the deleteEventLogButton is enabled showing the correct caption.
JSF - Snippet
<p:tabView id="logView">
<p:tab id="eventLogTab" title="Security Events">
<p:panelGrid ...>
<p:commandButton id="exportEventLogButton" icon="ui-icon-disk" styleClass="c25" ajax="false" title="Export Log" disabled="#{empty managedCmsLogsBean.eventLogEntityList}" update="deleteEventLogButton">
<p:fileDownload value="#{managedCmsLogsBean.exportEventLogFiles()}"/>
</p:commandButton>
<p:commandButton id="deleteEventLogButton" icon="ui-icon-trash" styleClass="c25" ajax="false" title="#{managedCmsLogsBean.deleteEventLogCaption}" disabled="#{! managedCmsLogsBean.eventLogExported}" action="#{managedCmsLogsBean.clearEventLogs()}" update="eventLogTab" />
</p:panelGrid>
<p:dataTable value="#{managedCmsLogsBean.eventLogEntityList}" ...>
...
</p:dataTable>
</p:tab>
</p:tabView>
Backing Bean - Snippet
private boolean eventLogExported;
public StreamedContent exportEventLogFiles() {
eventLogExported = true;
return logFileUtility.exportSecurityEventLog(eventLogEntityList, eventLogStartDate, eventLogStopDate);
}
public boolean isEventLogExported() {
return eventLogExported;
}
public void setEventLogExported(boolean value) {
eventLogExported = value;
}
public String getDeleteEventLogCaption() {
return eventLogExported ? "Delete Logs" : "Delete Logs - Export Required";
}
I tried moving the update event inside the FileDownload, but it didn't make a difference.
<p:commandButton id="exportEventLogButton" icon="ui-icon-disk" styleClass="c25" ajax="false" title="Export Log" disabled="#{empty managedCmsLogsBean.eventLogEntityList}">
<p:fileDownload value="#{managedCmsLogsBean.exportEventLogFiles()}">
<p:ajax update="deleteEventLogButton"/>
</p:fileDownload>
</p:commandButton>
I've searched for a couple of days now and have found MANY problems that come very close to this one... but none that have helped. :(
Just to make things very clear... I am NOT having problems with the export. The problem is that the Delete Log File Button is not enabled after the export is complete.
p:commandButton in your case is (an has to be) non-AJAX button (you set this by adding ajax="false" attribute). In that case update attribute and p:ajax tag doesn't have any sense (as they are only for AJAX requests). When you have file download your application sends streaming of some type, and you see Save File dialog. Your page is not refreshed. So you have to use PrimeFaces.monitorDownload to do this:
<p:commandButton id="exportEventLogButton"
icon="ui-icon-disk"
styleClass="c25"
ajax="false"
title="Export Log"
disabled="#{empty managedCmsLogsBean.eventLogEntityList}"
onclick="PrimeFaces.monitorDownload(null, stop)">
and add stop function which will update second button:
<p:remoteCommand name="stop" update="deleteEventLogButton"/>
As Balusc answered, In question (revisions) , we cannot get response twice from a single request, to refresh a page after download, better use the following java script in download link(p:commandbutton) onclick tag.
Example:
<p:commandButton ajax="false" icon="ui-icon-arrowstop-1-s" onclick="setTimeout('location.reload();', 1000);" action="#{managedBean.downloadMethod}" />
this will automatically refresh the page after 1 second, at the same time i.e. before refresh, you will get the download file, based on your download response time, increase the seconds in that script. Seconds should not less than that download response time.
From PrimeFaces 10, you are able to download files with ajax="true". This allows you to update components as well.
See also:
https://primefaces.github.io/primefaces/10_0_0/#/components/filedownload?id=ajax-downloading
https://github.com/primefaces/primefaces/issues/5978
Have you tried changing eventLogExported/isEventLogExported from boolean to Boolean or String ?
I'm working with JSF and PrimeFaces, and I can't handle the following situation:
I have a dialog, and I placed a dataTable on it. In one of the cells of the table I would like to display given data in 3 different ways, and I'd like to switch between them. So far I managed to switch between these rendering types via commandLink, but my problem is that when I click on one of the 3 links, the dialog closes! Can I update the content of the dialog, and be able to keep it open the same time? (I'm updating which render type to use via myMethod)
my commandLink looks like this:
<p:commandLink id="id" update=":myForm:myDialog" ajax="false"
action="#{myBean.myMethod}" oncomplete="dialog.show()">
If i don't use the ajax=false attribute, the method is not called, and I also tried imediate=true, but that's not it either.
You need to define an p:outputPanel inside your dialog and update the outputpanel, not the dialog itself (that's why your dialog closes):
<p:dialog id="myDialog" ...>
<p:outputPanel id="myOutputPanel">
... your dialog content goes here
</p>
</p:dialog>
and change your commandlink
<p:commandLink id="id" update=":myForm:myDialog:myOutputPanel" ajax="true"
action="#{myBean.myMethod}" oncomplete="dialog.show()">
Regarding the oncomplete="dialog.show()" - I'm not entirely sure if you need that. A precise answer can be given if you provide more code regarding your table and code.
I had the same problem, and solution is to update a form instead of dialog. For example:
<p:dialog id="id_dialog" ...>
<h:form id="id_form">
... content
</h>
</p:dialog>
and commandLink:
<p:commandLink update=":id_form" process="#all" ...>
This worked for me!
I have to perform two operations on button click.
call a method in a bean which will return a url and it will be set in some variable.
after that I have to open that url in another tab. I am using the action attribute of CommandButton and it is setting the URL value correctly, but how do I open that url as pdf in a new tab. i.e "URL of pdf should open in a new tab"
Code sample as follows:
<div class="form-options">
<h:commandButton value="Download Report" styleClass="btn btn-primary btn-icon buttonCustom" actionListener="#{reportBean.GenerateReport}">
</h:commandButton>
</div>
Hope I unterstood you right. This worked for me:
Provide the method generating the report and the URL in the actionListener-attribute of the commandButton (what you already did, according to your sample code).
Provide the method returning the URL in the action-attribute of the commandButton (it will be called after the actionListener-method).
For opening a new tab, add target="_blank in the parent <h:form> (taken from this questions answer)
XHTML-Code:
<h:form target="_blank">
<h:commandButton value="Show Report"
actionListener="#{reportBean.generateReport}"
action="#{reportBean.getUrl}" />
</h:form>
As this approach applies the target="_blank" to all non-ajax calls, here's another way using Javascript:
<h:form>
<h:commandButton value="Show Report"
actionListener="#{reportBean.generateReport}"
action="#{reportBean.getUrl}"
onclick="this.form.target='_blank'"/>
</h:form>
Java-Code:
public void generateReport(final ActionEvent evt) {
// ... generating report and setting url-variable
}
public String getUrl() {
return url;
}
If you have to forward to an external link, see this question
Use commandLink instead of commandButton..
When commandLink is used you need to provide value for target attribute as new window.
<h:commandLink target="new window">
Rest all the code will be as per your requirement.
Since the URL in which your report is present is already present in one of the variables you can use this variable from the bean in commandLink to provide the URL..
Elsewhile you can use an iframe also.It is generally used to display the report on the same page...
As I understand, your problem is not about redirecting the result of the action to a new tab, instead you want to show a report (if my guessing is right, you're using a JasperReport and want to show it in PDF format). To do this, you must download the file to the client computer and then let the default editor/program on the client handle the file.
I won't go into details for file download, BalusC provides good info about this matter:
How to stream a file download in a JSF backing bean?
How to download a file stored in a database with JSF 2.0
The relevant part to show PDF (or any other) files in browser is the ContentType of the response. This will say to the browser how the file must be threatened. Some content type values
PDF: application/pdf
Excel: application/vnd.ms-excel
Microsoft Word: application/ms-word
More: Internet media type
In case I'm wrong and you don't want to show (download) the file and need to open the file in a new Window, you have two ways (resuming both #JanisK. and #AngelsandDemons answers):
Setting the target of the form as "_blank", but this way will do that all the performed actions will open a new tab/window.
<h:form target="_blank">
<h:commandButton ... />
</h:form>
Using a commandLink instead of a commandButton, where you can set the target only for this link requests.
<h:form>
<h:commandLink target="_blank" ... />
</h:form>
I want to have a possibility to download .txt file in my JSF application. I use h:command button this way:
<h:commandButton value="Download" actionListener="#{exportBean.downloadFile}">
<f:attribute name="fileName" value="#{upload.name}"/>
</h:commandButton>
I use this methods in backing bean: http://pastebin.com/BMAQSgTJ (that implementation is probably ok because server returns me that file I want to download - it is possible to see in firebug output, i paste it only if you were interested)
My problem is that when I "click" on h:commandButton to download file, there is no dialog window to save or open file... does anybody know where is the problem?
This is my firebug output: http://dl.dropbox.com/u/21435926/firebug.png
You might want to replace the AJAX actionListener in
<h:commandButton value="Delete file" actionListener="#{exportBean.deleteFile}">
to an action:
<h:commandButton value="Delete file" action="#{exportBean.deleteFile}">
I would like to achieve this functionality.
<p:column>
<p:commandLink value="prihlasit" oncomplete="dlg.show();"
action="#{signForProjectBean.setProjectForDetail(item)}" />
</p:column>
I think is pretty clear what I am trying to do, I would like to display detail of the row in dataTable on which user have clicked. So my approach is to set property of current row to bean and then show the detail in dialog. But it is not working and I am feeling that I am doing something really wrong:-)
If the dialog component is supposed to display the selected item, then you need to ajax-udpate the dialog's content before opening it. Otherwise it will still display the old content as it was when the page is rendered for the first time.
<p:commandLink value="prihlasit" update=":dlg" oncomplete="dlg.show();"
action="#{signForProjectBean.setProjectForDetail(item)}" />
...
<p:dialog id="dlg" ...>