i tried this :
rule "new file"
when
FileData($old : fileOld, $new : fileNew, fileOld != fileNew)
$newFile : String( this not memberOf $old ) from $new
then
event : Event("file added", filename, new Date()) from $plus
Event.listOfEvents.add(event);
event.display();
end
this gives the following error:
The method Event(String, File, Date) is undefined for the type
Rule_new_file_0c90fff8d9b74b439ab79971b13b75ac
Syntax error on token "from", ; expected
$plus cannot be resolved to a type
Syntax error on token ".", ; expected
listOfEvents cannot be resolved
On Tue, Mar 11, 2014 at 12:09 AM, Davide Sottara <dso...@gmail.com> wrote:
> "from" will iterate for you, exactly like "accumulate" counted the
> events.
> If you need more details, please consult the documentation
>
>
>
> On 03/10/2014 07:29 PM, Sandhya Sree wrote:
>
> The problem here is even if multiple files are added, there is only one
> event object created. i want to have like say if 3 new files are added, 3
> event objects must be created, and all three event objects must be added to
> List<Event> listOfEvents.
>
>
> Thanks.
>
>
> On Mon, Mar 10, 2014 at 11:48 PM, Davide Sottara <dso...@gmail.com> wrote:
>
>> The "accumulates" should not be in the "then" part of a rule (see my
>> previous email).
>> That rule gave you two lists, in the variables $plus and $mins, that you
>> can use in the consequence.
>>
>> If you need to process each file separately, you may want to do something
>> like this:
>>
>> rule "new file"
>> when
>> FileData($old : fileOld, $new : fileNew, fileOld != fileNew)
>> $newFile : String( this not memberOf $old ) from $new
>> then
>> // create new event for a new file : new Event(...)
>> // add to list : Event.listOfEvents.add(...)
>> end
>>
>> You'll need another rule for the files that have been removed.
>>
>> Notice that your Event class has no way to distinguish "added" from
>> "removed" files, you may want to
>> add a boolean or something there.
>> Best
>> Davide
>>
>>
>> On 03/10/2014 07:04 PM, Sandhya Sree wrote:
>>
>> hi,
>> im new to drools..im trying to create a project as follows. i have a
>> class called Monitor which monitors a folder and creates two lists called
>> fileOld( which is the list of filenames in that folder at time t1) and
>> fileNew(which is the list of filenames in that folder at time t2). i have
>> another class called FileData which contains two members fileOld and
>> fileNew (list of strings) with getters,setters and constructor. fileOld and
>> fileNew from Monitor Class are passed to FileData class.
>>
>> i also have another class called Event which is as follows:
>> public class Event {
>> public static String name;
>> private File source;
>> private Date timeStamp;
>> public static List<Event> listOfEvents = new ArrayList<Event>();
>>
>> public Event(String name, File source, Date timeStamp) {
>> this.name = name;
>> this.source = source;
>> this.timeStamp = timeStamp;
>> }
>> public String getName() {
>> return name;
>> }
>> public void setName(String name) {
>> this.name = name;
>> }
>> public File getSource() {
>> return source;
>> }
>> public void setSource(File source) {
>> this.source = source;
>> }
>> public Date getTimeStamp() {
>> return timeStamp;
>> }
>> public void setTimeStamp(Date timeStamp) {
>> this.timeStamp = timeStamp;
>> }
>>
>> now i have to compare these two lists(fileOld and fileNew) in a rule
>> file and if they are not equal i have to create an event object for every
>> file added and deleted and put it in the List<Event> listOfEvents.
>>
>> here is my rule file:
>>
>> rrule "files are equal"
>> when
>> FileData( fileOld == fileNew)
>> then
>> System.out.println("files are equal");
>> end
>>
>>
>> rule "files not equal"
>> when
>> FileData($old : fileOld, $new : fileNew, fileOld != fileNew)
>>
>> then
>> accumulate( $s : String( this not memberOf $old ) from $new, $plus :
>> collectList( $s ) )
>> accumulate( $t : String( this not memberOf $new ) from $old, $mins :
>> collectList( $t ) )
>> System.out.println("files added:" + $plus );
>> System.out.println( "files deleted:" + $mins );
>> end
>>
>>
>>
>> how can i loop through each of the file added or deleted and create an
>> Event Class object for every file added and deleted and finally add all
>> the created objects to List<Event> listOfEvents..
>>
>>
>> Thanks.
>>
>>
>> _______________________________________________
>> rules-users mailing
>> listrules-users@lists.jboss.orghttps://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>>
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>
>
>
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