topic Re: Declared value has type org.activiti.engine.impl.el.Fixed in Alfresco Archive

Declared value has type org.activiti.engine.impl.el.Fixed

dognose — Mon, 05 Nov 2012 06:28:46 GMT

Hello Guys,i'm currently working with Custom Extensions for the Designer.What i'm trying to do, is setup a Mail-Task that uses my internal template-systemfor sending mails.The extension of AbstractCustomServiceTask declares 2 fields: mailTemplateID (String) and receiver (string)So, i also added thos

Re: Declared value has type org.activiti.engine.impl.el.Fixed

frederikherema1 — Mon, 05 Nov 2012 11:03:03 GMT

Fields used by field-injection should be of type "Expression", and should be resolved when needed, using the passed-in DelegateExecution in the execute() method:


public class ReverseStringsFieldInjected implements JavaDelegate {

  private Expression text1;
  private Expression text2;

  public void execute(DelegateExecution execution) {
    String value1 = (String) text1.getValue(execution);
    execution.setVariable("var1", new StringBuffer(value1).reverse().toString());

    String value2 = (String) text2.getValue(execution);
    execution.setVariable("var2", new StringBuffer(value2).reverse().toString());
  }
}

Re: Declared value has type org.activiti.engine.impl.el.Fixed

dognose — Tue, 11 Dec 2012 11:57:39 GMT

Sry, got to dig this out again:

I'm now using The Expressions as mentioned above:

public class MyMailTaskDelegation implements org.activiti.engine.delegate.JavaDelegate {

 private Expression mailTemplateId;
 private Expression internalUserId;
 private Expression externalAdress;
 private Expression externalName;

 @Override
 public void execute(DelegateExecution execution) throws Exception {

with the implementation of the AbstractCustomServiceTask as follows:


@Runtime(delegationClass = MyMailTask.DELEGATION)
public class MyMailTask extends AbstractCustomServiceTask {
  /* 
…
static strings here
…
*/
   @Property(type = PropertyType.TEXT, displayName = MyMailTask.FIELD_NAME_TEMPLATE_ID, required = true)
 @Help(displayHelpShort = MyMailTask.FIELD_HELP_TEMPLATE_ID)
 private String mailTemplateId;

 @Property(type = PropertyType.TEXT, displayName = MyMailTask.FIELD_NAME_INTERNAL)
 @Help(displayHelpShort = MyMailTask.FIELD_HELP_INTERNAL)
 private String internalUserId;

 @Property(type = PropertyType.TEXT, displayName = MyMailTask.FIELD_NAME_EXTERNAL_MAIL)
 @Help(displayHelpShort = MyMailTask.FIELD_HELP_EXTERNAL_MAIL)
 private String externalAdress;

 @Property(type = PropertyType.TEXT, displayName = MyMailTask.FIELD_NAME_EXTERNAL_NAME)
 @Help(displayHelpShort = MyMailTask.FIELD_HELP_EXTERNAL_NAME)
 private String externalName;

now, in Designer i set
templateId=LostPassword
internalUserId=#{requestingUserId}

However, Activiti injects the internalUserId as an Instance of Type FixedValue and therefore getValue() will return #{requestingUserId}
instead of 4878 or whatever evaluated id of given user.

Do i need to mark the Properties as "dynamic" in any way?

I noticed that the Designer generates the following XML:


<serviceTask id="servicetask3" name="MyMailTask" activiti:class="my.namespace.taskDelegations.MyMailTaskDelegation">
      <extensionElements>
        <activiti:field name="mailTemplateId">
          <activiti:string>LostPassword</activiti:string>
        </activiti:field>
        <activiti:field name="internalUserId">
          <activiti:string>${requestingUserId}</activiti:string>
        </activiti:field>
      </extensionElements>
    </serviceTask>

but should be


<serviceTask id="servicetask3" name="MyMailTask" activiti:class="my.namespace.taskDelegations.MyMailTaskDelegation">
      <extensionElements>
        <activiti:field name="mailTemplateId">
          <activiti:string>LostPassword</activiti:string>
        </activiti:field>
        <activiti:field name="internalUserId">
          <activiti:expression>${requestingUserId}</activiti:expression>
        </activiti:field>
      </extensionElements>
    </serviceTask>

So, is this a designer "Bug", or is it because the Properties in "MyMailTask" are defined as Strings?
But i cannot declare them as Expression or JuelExpression, because the namespace org.activiti.engine.impl.el is not available
in the DesignerExtension project.

Edit:
If i manually change the XML from <activiti:string> to <activiti:expression> it works as expected.

Re: Declared value has type org.activiti.engine.impl.el.Fixed

dognose — Mon, 04 Feb 2013 09:46:16 GMT

giving this a tiny bump:

How can i make activiti to generate <activiti:expression> instead of <activiti:string> in the resulting XML file?
(see example from last post)

Re: Declared value has type org.activiti.engine.impl.el.Fixed

trademak — Mon, 04 Feb 2013 09:55:44 GMT

Hi,

Which version of the Designer are you using? This is working in the latest release.

Best regards,

Re: Declared value has type org.activiti.engine.impl.el.Fixed

dognose — Mon, 04 Feb 2013 12:54:22 GMT

Updated to the latest version.
You're right. It works now as expected