I develop web application using Drools. All my drools files store into the database. After modifying some rule I must create new KnowledgeBase and add packages which I create from rules. How I can update only those packages in KnowledgeBase that I need, because regenerate all KnowledgeBase very expensive of time; For example I make next step;
User edit rule and push apply button.
After that I do something that:
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newReaderResource( Reader, getClass() ),ResourceType.DRL );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
I store rule script how text in database and use Reader to add package in KnowledgeBuilder.. I take rule database format from here
http://docs.codehaus.org/display/DROOLS/Loading+and+managing+rules+dynamically+from+a+database
I tried to remove package by name from Knowledge Base and add again but not successful. What I must to do for update my Knowledge Base. I can't create new Knowledge Base every time when user edit and save rule, I must do something actions for update some part of Knowledge Base, let me put it this way.
Please, help.
Did you read about the knowledgeAgent inside the drools documentation? That component contains the logic to merge new changes into an existing knowledge base, as far as I remember.
Cheers
I read what knowledgeAgent work only with changeset.xml configuration and scan resurce which was define in changeset.xml
Related
I'm using Solr 6.5 to index files from multiples ftp files into multiples cores (having one core for each type of document, like audio file, image, software, video and documents).
The situation is that I'm doing this to populate an app that in its front end has a social networking approach in which every user can add new tags or modify other metadata without restriction.
So when I execute again data import handler to add new files to my application, it erase the index that previosly was modified for the user and set up with the data-config default configuration.
My question: is there a way to tell DIH, if the id exists, continues without importing and just adds the files which don't have an id in the index?
If this is not possible, can I do something similar in a different way?
Thanks for everything!
Sounds like you are doing a full import with default settings. One of them is clean, which defaults to true and deletes the whole index before the import.
Try setting it to false and also look at preImportDeleteQuery and postImportDeleteQuery for even more precision.
The thing is I have found how upload a document and after that downolad it. But I just want to download it. I want to do it using the UI designer but I dont know how to do it.
Thanks :)
I dont know which tool are you using to design your UI, anyway this is concerning functionality, not design. In that point, i need to know wich language do you want (or can) use. For example, in PHP, it's very simple, you can make something like:
(create php file) downloadpdf.php
1st: (if you want to generate pdf "on the fly":
<?php
function download($foo){
content headers (type, force-download, etc)
database select to get data or harcode it.
echo data
}
?>
and call this function with some id to select from database or something (ignore if you want to hardcode it)
Other option to download a file, if it's stored on server is making a link to this file (statically or dyamically). If you wanna take control to file downloads, check this post:
http://www.media-division.com/the-right-way-to-handle-file-downloads-in-php/
I don't mean that it can be done with UI designer tools, and it's not concerned if it's from a form or not.
Cheers!
You should create link and variable which type is javascript expression. On Variable value write
return "/bonita/portal/" + $data.context.mainDoc_ref.url;
On link URL write your variable and to text
Download: {{context.mainDoc_ref.fileName}}
Here you can find excellent example for this case
I heard that scout eclipse can create table page - AbstractPageWithTable out of database table properties, without manually adding columns for it.
Is this true, and if it is is somebody knows how to do it?
Dynamic UI Components:
I am not sure I understand your question correctly. Can I rephrase it like this:
How can I add a column dynamically (without having to define them as inner class)?
Here some pointers on the Scout Forum:
Is possible to create a dynamic PageView and Form ?
How to create UI fields at runtime?
...
My personal opinion is that the scout philosophy is to have a declarative UI defined with inner classes. I am not sure I would recommend someone to use this dynamic approach...
Scaffoling for Eclipse Scout:
From your comment, I now understand your question like this:
Given an existing database, is it possible to generate some elements of the application like TablePages?
I am afraid there is no open-source tool doing this for the moment. In our company, we have some developers, having a series of scripts to do something like what you are describing.
There is a project called SAML (Scout Application Modeling Language) where the user interface is described with a DSL and the Scout entities are generated. This is more a prototype that was built for the Kepler version of scout (3.9). For the moment there is no active development on it.
I have also started some builder where you do something like:
SimpleApplicationBuilder app = SimpleApplicationBuilder.create("myapp", "simple.myapp", "");
IScoutFormBuilder formBuilder = ScoutBuilders.form("MyFirstForm", "simple.myapp.client.ui.forms", "simple.myapp.shared.services")
.propTitle(app.nlsKey("MyFormTitle"))
.propSubTitle(app.nlsKey("MyFormSubTitle"))
.propAskIfNeedSave(false)
.propDisplayHint(DisplayHint.DISPLAY_HINT_VIEW)
.addField(ScoutBuilders.groupBox("ContentGroupBox")
.propBorderVisible(false)
.addField(ScoutBuilders.stringField("MyStringField")
.propLabel(app.nlsKey("MyStringLabel"))
)
.addField(ScoutBuilders.tableField("MyTableField")
.propTableStatusVisible(true)
.addTable(ScoutBuilders.table("MyTable")
.propAutoResizeColumns(true)
.addColumn(ScoutBuilders.integerColumn("IdComlum")
.propDisplayable(false)
)
.addColumn(ScoutBuilders.stringColumn("NameComlum")
.propHeaderText(app.nlsKey("Name"))
)
.addColumn(ScoutBuilders.integerColumn("AgeComlum")
.propHeaderText(app.nlsKey("Age"))
)
)
)
);
app.addForm(formBuilder);
The idea is to have a Java model of the application source code. It should allows to be able to do modifications or to add new entities and then to generate or modify the code. My tool is not open source for the moment (it is not finished yet and I do not have enough time to work on it).
I definitively think that scaffolding for Eclipse Scout would be great. I have published a master thesis proposal to work with a student on this topic. I hope we will be able to move forward.
Here some pointers in the Eclipse Scout forum:
Scout usage from command line
Form Generator based on DB Table layout
Let me know if you are interested in those topics.
I have requirement where i need to archive a content item after a particular period but i should be able to access archived item anytime?
Also I want to know what is alfresco's content archiving strategy out of the box & how can i use it?
Can anybody help?
Regards.
Finally, after some googling, i can say that content archiving in alfresco depends upon stores & can be achieved using two ways:Common & Dedicated.
If there is no specific need to create dedicated archival store, archiving can be implemented in same contentstore(say workspace:\\spacestore...) using aspect such as effectivity aspect or any custom aspect, adding which we can tell system that content in context is eligible for archival in same store(contentstore) and using rules/actions, content can be moved or copied in another space of same contentstore and its permissions can be updated (as & when needed).
If there is a need to create dedicated archival store say in large repositories or compliance based systems, new content store can be added using http://wiki.alfresco.com/wiki/Content_Store_Selector and using cm:storeSelector aspect and setting its cm:storeName property, content can be moved/copied between stores and permissions managed.
Step 1 is more of configuration & step 2 is more of customizations.
Happy archiving.
Regards.
P.S. Feel free to add any more approaches.
A friend of mine is now building a web application with J2EE and Struts, and it's going to be prepared to display pages in several languages.
I was told that the best way to support a multi-language site is to use a properties file where you store all the strings of your pages, something like:
welcome.english = "Welcome!"
welcome.spanish = "¡Bienvenido!"
...
This solution is ok, but what happens if your site displays news or something like that (a blog)? I mean, content that is not static, that is updated often... The people that keep the site have to write every new entry in each supported language, and store each version of the entry in the database. The application loads only the entries in the user's chosen language.
How do you design the database to support this kind of implementation?
Thanks.
Warning: I'm not a java hacker, so YMMV but...
The problem with using a list of "properties" is that you need a lot of discipline. Every time you add a string that should be output to the user you will need to open your properties file, look to see if that string (or something roughly equivalent to it) is already in the file, and then go and add the new property if it isn't. On top of this, you'd have to hope the properties file was fairly human readable / editable if you wanted to give it to an external translation team to deal with.
The database based approach is useful for all your database based content. Ideally you want to make it easy to tie pieces of content together with their translations. It only really falls down for all the places you may want to output something that isn't out of a database (error messages etc.).
One fairly old technology which we find still works really well, is to use gettext. Gettext or some variant seems to be available for most languages and platforms. The basic premise is that you wrap your output in a special function call like so:
echo _("Please do not press this button again");
Then running the gettext tools over your source code will extract all the instances wrapped like that into a "po" file. This will contain entries such as:
#: myfolder/my.source:239
msgid "Please do not press this button again"
msgstr ""
And you can add your translation to the appropriate place:
#: myfolder/my.source:239
msgid "Please do not press this button again"
msgstr "s’il vous plaît ne pas appuyer sur le bouton ci-dessous à nouveau"
Subsequent runs of the gettext tools simply update your po files. You don't even need to extract the po file from your source. If you know you may want to translate your site down the line, then you can just use the format shown above (the underscored function) with all your output. If you don't provide a po file it will just return whatever you put in the quotes. gettext is designed to work with locales so the users locale is used to retrieve the appropriate po file. This makes it really easy to add new translations.
Gettext Pros
Doesn't get in your way while coding
Very easy to add translations
PO files can be compiled down for speed
There are libraries available for most languages / platforms
There are good cross platform tools for dealing with translations. It is actually possible to get your translation team set up with a tool such as poEdit to make it very easy for them to manage translation projects
Gettext Cons
Solves your site "furniture" needs, but you would usually still want a database based approach for your database driven content
For more info on gettext see this wikipedia page
They way I have designed the database before is to have an News-table containing basic info like NewsID (int), NewsPubDate (datetime), NewsAuthor (varchar/int) and then have a linked table NewsText that has these columns: NewsID(int), NewsText(text), NewsLanguageID(int). And at last you have a Language-table that has LanguageID(int) and LanguageName(varchar).
Then, when you want to show your users the news-page you do:
SELECT NewsText FROM News INNER JOIN NewsText ON News.NewsID = NewsText.NewsID
WHERE NewsText.NewsLanguageID = <<Session["UserLanguageID"]>>
That Session-bit is a local variable where you store the users language when they log in or enters the site for the first time.
Java web applications support internationalization using the java standard tag library.
You've really got 2 problems. Static content and dynamic content.
for static content you can use jstl. It uses java ResourceBundles to accomplish this. I managed to get a Databased backed bundle working with the help of this site.
The second problem is dynamic content.
To solve this problem you'll need to store the data so that you can retrieve different translations based on the user's Locale. (Locale includes Country and Language).
It's not trivial, but it is something you can do with a little planning up front.
#Auron
thats what we apply it to. Our apps are all PHP, but gettext has a long heritage.
Looks like there is a good Java implementation
Tag libraries are fine if you're using JSP, but you can also achieve I18N using a template-based technology such as FreeMarker.