Example for adding attachment to email at mule - email

Question

I would like to ask how to add file as attachment in Mule (3.4.0)?
I tried many solutions and googled a lot but haven't found anything good.
This is what I have now (last try before posting here):
<sub-flow name="sendBackMail" doc:name="sendBackMail">
<set-attachment attachmentName="changed.xml" value="#[payload]" contentType="text/xml" doc:name="Attachment"/>
<logger message="Attachment ok" level="INFO" doc:name="Logger"/>
<file:file-to-byte-array-transformer doc:name="File to Byte Array"/>
<logger message="Attachment ok. Message: #[message]" level="INFO" doc:name="Logger"/>
<smtps:outbound-endpoint host="${mailSMTP}" port="${mailSendPort}"
user="${mailUser}" password="${mailPass}" to="${receiver}"
from="${mailUser}" responseTimeout="60000" doc:name="SMTP"
connector-ref="SMTP" mimeType="text/xml" subject="msp2bass" >
</smtps:outbound-endpoint>
</sub-flow>
It sends mail but I get content of xml file as body of mail.
What should I do/change so that mail would be sent as attachment. I get file from another sevice, do XSLT on it and then I should send it to some mail.
Any more info I should provide?
Thank you!
EDIT
How I call bean:
<spring:bean id="SetAttachment" name="SetAttachment" class="si.irose.msp.cust.bass.SetAttachment">
</spring:bean>
<component doc:name="Java">
<spring-object bean="SetAttachment"/>
</component>
Java class:
package si.irose.msp.cust.bass;
import org.mule.api.MuleEventContext;
import org.mule.api.MuleMessage;
import org.mule.api.lifecycle.Callable;
public class SetAttachment implements Callable{
private MuleMessage mule;
private String name;
#Override
public Object onCall(MuleEventContext eventContext) throws Exception {
mule = eventContext.getMessage();
String tryit="routeid";
for (int i=0;i<mule.getInvocationPropertyNames().toArray().length;i++) {
if (mule.getInvocationPropertyNames().toArray()[i].equals(tryit)) {
name=mule.getInvocationProperty(mule.getInvocationPropertyNames().toArray()[i].toString()).toString();
break;
}
}
mule.addOutboundAttachment(name, mule.getInvocationProperty(name), "text/xml");
return null;
}
}

Answer 1

Ok issue solved.
When you read from file inbound or generate with quartz (string or file) you can add "Attachment" directly BUT if you do an XSLT transformation and then try to send that payload via smtp, then you need to add "Object to String" transformer before attachment.
Final working solution:
<sub-flow name="sendBackMail" doc:name="sendBackMail">
<object-to-string-transformer doc:name="Object to String"/>
<set-attachment attachmentName="changed.xml" value="#[payload]" contentType="text/xml" doc:name="Attachment"/>
<logger message="Attachment ok" level="INFO" doc:name="Logger"/>
<file:file-to-byte-array-transformer doc:name="File to Byte Array"/>
<logger message="Attachment ok. Message: #[message]" level="INFO" doc:name="Logger"/>
<smtps:outbound-endpoint host="${mailSMTP}" port="${mailSendPort}"
user="${mailUser}" password="${mailPass}" to="${receiver}"
from="${mailUser}" responseTimeout="60000" doc:name="SMTP"
connector-ref="SMTP" mimeType="text/xml" subject="msp2bass" >
</smtps:outbound-endpoint>
</sub-flow>
I haven't checked yet what transformer you need to apply if you do any other job instead of XSLT so if anyone wish to add some knowledge to this then please do so and add comment.

Answer 2

You need to use set-payload before the smtps:outbound-endpoint to set the body of the email to whatever you want, otherwise it will contain the same value attached with set-attachment.
Also remove the file:file-to-byte-array-transformer: it's unclear what it's there for.