Re: [concern-users] Transient values in subjects

[Holger E. <he...@me...>]

Hi Manfred,

con:cern handles every activity in its own transaction and reloads the subject
for every transaction (by means of the loader) .. thus con:cern is 
clusterable.

This is the reason, why your transient properties are lost.

Holger


Quoting Manfred Deutsch <mf...@ma...>:

> Holger,
>
> Thank you for the quick answer.
>
> I'm using hibernate for the object. Some attributes of the class are
> mapped as hibernate properties. Another attribute of this class isn't
> mapped to a persistent field. Here is an example of such a class (see
> hibernate-xdoclet-tags for persistent fields):
>
> /**
> * Speicherung Dateien
> *
> * @hibernate.class
> *  table="FILES"
> */
> public class LoadFile implements Serializable {
>    // Persistente Felder
>    private Integer fileId;
>    private String fileName;
>
>    // Transiente Felder
>    private String transientValue;
>
>    /**
>     * Objekt anlegen
>     */
>    public LoadFile() {
>        super();
>    }
>
>
>    /**
>     * @return Returns the fileId.
>     *
>     * @hibernate.id
>     *          column="FILE_ID"
>     *          generator-class="hilo"
>     *          unsaved-value="null"
>     * @hibernate.generator-param
>     *          name="table"
>     *          value="SEQUENCE_FILE"
>     * @hibernate.generator-param
>     *          name="column"
>     *          value="IDX"
>     */
>    public Integer getFileId() {
>        return fileId;
>    }
>
>    /**
>     * @param fileId The fileId to set.
>     */
>    public void setFileId(Integer fileId) {
>        this.fileId = fileId;
>    }
>
>    /**
>     * @return Returns the fileName.
>     *
>     * @hibernate.property
>     *          column="FILE_NAME"
>     *          length="256"
>     */
>    public String getFileName() {
>        return fileName;
>    }
>
>    /**
>     * @param fileName The fileName to set.
>     */
>    public void setFileName(String fileName) {
>        this.fileName = fileName;
>    }
>
>    /**
>     * @return Returns the transientValue
>     */
>    public String getTransientValue() {
>        return this.transientValue;
>    }
>
>    /**
>     * @param transientValue The transientValue to set.
>     */
>    public void setTransientValue(String transientValue) {
>        this.transientValue = transientValue;
>    }
> }
>
> I'm new to con:cern. So may be I didn't understand how to do some things
> right.
>
> Manfred
>
>
>
>
>
> Am Montag, den 24.10.2005, 10:10 +0200 schrieb Holger Engels:
>> Quoting Manfred Deutsch <mf...@ma...>:
>>
>> > Hello,
>> >
>> > 1) Is is possible to store transient values in subjects?
>> >
>> >   I added a non persistant attribute to a subject. In an action I tried
>> >   to change the value of this attribute. The call to setValue
>> >   succeeded, but when it returned the value wasn't changed. Looks like
>> >   it was set to an proxy?
>>
>> I don't quite understand, what you mean here. Are you using 
>> hibernate and are
>> you talking about a hibernate mapped property?
>>
>> > 2) I want to process a subject immediately from within a session bean
>> >   (JBoss). So I called subject.process(subjectId). The call throws a
>> >   ControllerException: transaction not allowed.
>> >   subject.announceSubject(...) at same place works fine.
>> >   How should I start immediate processing of a subject from within a
>> >   session bean?
>>
>> the call to process will run several transactions (one per activity).
>> it is not
>> allowed to run it from inside a running transaction. commit or suspend your
>> transaction, before calling process.
>>
>> Holger
>>
>>
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>
>
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