Experimental Physics and
Industrial Control System

吴煊 via Tech-talk <tech-talk at aps.anl.gov> · Wed, 16 Nov 2022 14:59:49 +0800 (GMT+08:00)

I need to implement a save and restore funciton. When click an action button, then execute the script: find the widget by it's name, get the pv name and then get the pv value, finally write the value into a xml file. I've implement this using java script in CSS 3.2.16. Recently, We try to migrate the project from CSS to Phoebus. There is example about reading xml file but there is not examle about create and write xml file in display builder examples. The java script code as below:

#######################################################
importPackage(Packages.org.csstudio.opibuilder.scriptUtil);
importPackage(Packages.org.csstudio.opibuilder.util);
importPackage(Packages.java.io);  
importPackage(Packages.org.jdom);  
importPackage(Packages.org.jdom.output);
importPackage(Packages.java.lang);

var i;
var geo;
var temp="";
var macro;
var ISptPV;
var ISpt;

geo = widget.getMacroValue("GEO");
//get the PS name
var configFileName = "./configure/" + geo + "_Main_Config.xml"; 
var root1 = FileUtil.loadXMLFile(configFileName, widget);
var children1 = root1.getChildren();
var mainPSName = children1.get(0).getChildren();
var sizeName = mainPSName.size();

// create root element  
var root = new Element(geo); 
// add the root node to the doc  
var doc = new Document(root);

// create an element  
var element1 = new Element("Main");
for(i=0; i<mainPSName.size(); i++)
{
	//get macros
	macro = mainPSName.get(i);
	temp = geo + "_" + macro.getValue();
	ISptPV = display.getWidget("Std_Setpoint_"+temp).getPV();
	ISpt = PVUtil.getDouble(ISptPV);
	// add sub node to the element
	element1.addContent(new Element(macro.getValue()).setText(ISpt));
}	

// add the element to the root node  
root.addContent(element1);

// create XMLOutputter object  
var format = Format.getPrettyFormat();  
format.setEncoding("UTF-8");  
format.setIndent("   ");  
var  xmlOut = new XMLOutputter(format);  

// create file name append current time
var date = new Date();
var time = date.getFullYear() + "." + (date.getMonth() + 1) + "." +  date.getDate() + "." + 
date.getHours() + "." +  date.getMinutes() + "." +  date.getSeconds();  
var opiFolderPath = ResourceUtil.buildAbsolutePath(display.getModel(), ResourceUtil.getPathFromString("./")).toString()
var fileName = FileUtil.workspacePathToSysPath(opiFolderPath) +"/data/" + geo + "_Main_" + time + ".xml";
//var fileName = FileUtil.workspacePathToSysPath("test/") +"/" + geo + "_" + time;      
// output target.xml  
xmlOut.output(doc, new FileOutputStream(fileName));

#######################################################
The configuration file is like this:
<LRBT_PS>
 	<Main> 	
		<PS>LRSWBPS01</PS>
		<PS>LDSWBPS01</PS>
		<PS>LRBPS01</PS>
		<PS>LRQPS01</PS>
		<PS>LRQPS02</PS>
		<PS>LRQPS03</PS>
 	</Main>	
</LRBT_PS>

#######################################################
And the generated data file is like this:
<?xml version="1.0" encoding="UTF-8"?>
<ACC_LRBT_PS>
   <Main>
      <LRSWBPS01>150</LRSWBPS01>
      <LDSWBPS01>-150</LDSWBPS01>
      <LRBPS01>160</LRBPS01>
      <LRQPS01>15</LRQPS01>
      <LRQPS02>30</LRQPS02>
      <LRQPS03>9</LRQPS03>
   </Main>
</ACC_LRBT_PS>

I hope I've made it clear. BTW, I know that there is a save and restore service in phoebus, however I haven't test it.
Thanks,
Xuan

> -----原始邮件-----
> 发件人: "Pete Jemian via Tech-talk" <tech-talk at aps.anl.gov>
> 发送时间: 2022-11-16 11:58:30 (星期三)
> 收件人: tech-talk at aps.anl.gov
> 抄送: 
> 主题: Re: [EXTERNAL] Phoebus: Find/Replace and Write XML file
> 
> Your challenge when writing or replacing a PV value into an xml file is locating _which_ PV value to be replaced, finding the correct  the xml node to be edited.  Assuming the XML file uses more than a single PV, you'd need a way of finding the correct one.
> 
> That complicates the simple example you request.  For example, one of the widgets in the synApps/std timer screen has this xml:
> 
>    <widget type="choice" version="2.0.0">
>      <name>choice button #23</name>
>      <pv_name>$(P)timer$(N):Go</pv_name>
>      <x>5</x>
>      <y>34</y>
>      <width>70</width>
>      <height>35</height>
>      <background_color>
>        <color red="115" green="223" blue="255">
>        </color>
>      </background_color>
>      <horizontal>false</horizontal>
>      <border_alarm_sensitive>false</border_alarm_sensitive>
>      <items>
>        <item>Item 1</item>
>        <item>Item 2</item>
>      </items>
>    </widget>
> 
> The .bob file has these PVs:
> 
> (base) ~$ grep pv_name /usr/local/epics/synApps6.1/support/std-R3-6-2/stdApp/op/bob/autoconvert/timer.bob
>      <pv_name>$(P)timer$(N):elapsedSecs</pv_name>
>      <pv_name>$(P)timer$(N):Go</pv_name>
> 
> You could use the findall() (https://lxml.de/tutorial.html#elementpath) method to locate the `pv_name` nodes but you must still decide which to edit.  The macros (with definitions unique to this file) are defined elsewhere in the file.
> 
> Describe for us what you plan to do (create a new .bob file from an empty file or edit an existing file that you provide us) and it will be simpler to provide you with an example using lxml.
> 
> Regards,
>     Pete
> 
> 
> On 11/15/2022 8:48 PM, 吴煊 via Tech-talk wrote:
> > Many thanks for all your tips. It seems that phoebusgen is used to generate widgets.I need to write pv value into a xml file, so using etree maybe better. That would be great if there was an example.
> > 
> > Xuan
> > 
> >     -----原始邮件-----
> >     *发件人:*"Tynan Ford" <TFord at lbl.gov>
> >     *发送时间:*2022-11-16 00:56:24 (星期三)
> >     *收件人:* "Liu, Wanming" <wmliu at anl.gov>
> >     *抄送:* "吴煊" <wux at ihep.ac.cn>, "kasemir, kay" <kasemirk at ornl.gov>, tech-talk <tech-talk at aps.anl.gov>
> >     *主题:* Re: Re: [EXTERNAL] Phoebus: Find/Replace and Write XML file
> > 
> >     I would not necessarily recommend doing this but you can see an example (exampleInPhoebus files) of creating XML file in jython here: https://github.com/als-epics/phoebusgen/tree/master/examples <https://github.com/als-epics/phoebusgen/tree/master/examples>
> > 
> >     On Tue, Nov 15, 2022 at 8:36 AM Liu, Wanming via Tech-talk <tech-talk at aps.anl.gov <mailto:tech-talk at aps.anl.gov>> wrote:
> > 
> >         The bob file is a xml file.  So you can use etree from lxml package to manipulate the file with python. ____
> > 
> >         __ __
> > 
> >         *From:* Tech-talk <tech-talk-bounces at aps.anl.gov <mailto:tech-talk-bounces at aps.anl.gov>> *On Behalf Of *?? via Tech-talk
> >         *Sent:* Monday, November 14, 2022 7:58 PM
> >         *To:* kasemir, kay <kasemirk at ornl.gov <mailto:kasemirk at ornl.gov>>
> >         *Cc:* tech-talk <tech-talk at aps.anl.gov <mailto:tech-talk at aps.anl.gov>>
> >         *Subject:* Re: Re: [EXTERNAL] Phoebus: Find/Replace and Write XML file____
> > 
> >         __ __
> > 
> >         I'm sorry I didn't make myself clear. I wish to know how to create and write XML file using jython/python script in phoebus? Is there a way to find and replace charactors especially pv_names in xxx.bob file? ____
> > 
> >         Xuan ____
> > 
> >             -----原始邮件-----
> >             *发件人:*"Kasemir, Kay" <kasemirk at ornl.gov <mailto:kasemirk at ornl.gov>>
> >             *发送时间:*2022-11-14 22:27:56 (星期一)
> >             *收件人:* tech-talk <tech-talk at aps.anl.gov <mailto:tech-talk at aps.anl.gov>>, "吴煊" <wux at ihep.ac.cn <mailto:wux at ihep.ac.cn>>
> >             *抄送:*
> >             *主**题:* Re: [EXTERNAL] Phoebus: Find/Replace and Write XML file____
> > 
> >              > Is there "Find/Replace" function still in phoebus? It's very useful for replacing pv names or other things in CSS. Another question I'd like to ask:how to create and write XML file in phoebus? I haven't see it in display builder examples. Any advice or suggestions will be grately appretiated ____
> > 
> >             __ __
> > 
> >             __ __
> > 
> >             Yes, one advantage of the XML file format is that it allows creating or modifying theses files outside of the graphical editor. ____
> > 
> >             We don't try to include a complete XML editor in phoebus, but you can easily add an OS-specific editor to the context menu so that you can then open a display file from the phoebus file browser via the context menu. ____
> > 
> >             __ __
> > 
> >             For example, on Linux you can add a reference to the plain "gedit" text editor like this, so it can then be used to open *.bob or *.opi files and for example perform PV name replacements:____
> > 
> >             __ __
> > 
> >             org.phoebus.framework.workbench/external_app_text=Text Editor,txt|dat|tab|py|ini|def|db|xml|xsl|css|cmd|sh|st|log|out|md|tex|shp|bob|opi|pvs|edl,gedit____
> > 
> >             __ __
> > 
> >             You could also register VS code or another more XML-aware editor just for *.bob like that. ____
> > 
> >             __ __
> > 
> >             __ __
> > 
> >             For a general python package that generates display files outside of phoebus, see https://github.com/als-epics/phoebusgen <https://github.com/als-epics/phoebusgen>____
> > 
> >             __ __
> > 
> >             __ __
> > 
> >             -Kay ____
> > 
> >             __ __
> > 
> 
> -- 
> ----------------------------------------------------------
> Pete R. Jemian, Ph.D.                 <jemian at anl.gov>
> Beam line Controls and Data Acquisition (BC, aka BCDA)
> Advanced Photon Source,    Argonne National Laboratory
> Argonne, IL  60439                    630 - 252 - 3189
> -----------------------------------------------------------
>        Education is the one thing for which people
>           are willing to pay yet not receive.
> -----------------------------------------------------------
>   

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System