Could not find work item handler for Email - drools

Question

I am trying to achieve email alert from bpm flow in drools.
Below are the steps I have taken
Step 1 : Added email task in bpm flow and configured
Step 2 : Configured work item handlers
new org.jbpm.process.workitem.email.EmailWorkItemHandler("smtp.gmail.com","587","hello#gmail.com","xseregrgr","true")
Step3 : Standalone.xml configuration file changes
<subsystem xmlns="urn:jboss:domain:mail:3.0">
<mail-session name="default" jndi-name="java:jboss/mail/Default">
<smtp-server outbound-socket-binding-ref="mail-smtp" username="hello#gmail.com" password="xyz" tls="true"/>
</mail-session>
</subsystem>
<outbound-socket-binding name="mail-smtp">
<remote-destination host="smtp.gmail.com" port="587"/>
</outbound-socket-binding>
Post all this during testing , we received Could not find work item handler for Email
Anything got missed. Please let me know.

Answer 1

You are missing the WorkItem Definition. You can give it name like "Gmail email client send" and should look something like this:
[
[
"name" : "Email",
"displayName" : "Gmail email client send",
"category" : "jbpm-workitems-email",
"description" : "",
"defaultHandler" : "mvel: new org.jbpm.process.workitem.email.EmailWorkItemHandler()",
"documentation" : "jbpm-workitems-email/index.html",
"parameters" : [
"Reply-To" : new StringDataType()
,"Cc" : new StringDataType()
,"Bcc" : new StringDataType()
,"From" : new StringDataType()
,"To" : new StringDataType()
,"Body" : new StringDataType()
,"Attachments" : new StringDataType()
,"Subject" : new StringDataType()
,"Debug" : new StringDataType()
,"Template" : new StringDataType()
],
"mavenDependencies" : [
"org.jbpm:jbpm-workitems-email:7.34.0.Final"
],
"icon" : "Email.png"
]
]

Answer 2

The solution mentioned here works fine with the latest JBPM 7.25 version. Here some more details about the signle steps.
It's important that you delete everything that you added so far related to the email sending (e.g. Service Worker, Deployment configs, EMail send tasks in process model). This could be outdated or influence the configuration negative.
Start by open your "Project Settings" in Business Central and click "Install" for the "Email" Service Task.
Provide your EMail-Provider Configuration (Host, Port, User Name, Password). E.g. for Gmail this can be found here.
Warning: Please note that for Gmail you need to active the access for "Less secure apps" here to connect to the SMTP Server.
With the provided Information JBPM generates the required WorkItemHandler configuration (you need to refresh the page to see it). If you need to, you can update values here later on when you need to change the Mail-Provider configuration.
Next we build a new Business Process Model and add the required Email task.
Finally we can configure the Email task with the information for sending the email (e.g. From, To, Subject, Body)
That's all. Now you can deploy and run the Process.

Answer 3

go to Settings/Service Tasks and Install Email