Mail (Smart GWT EE API 5.1p (2022-05-28))

java.lang.Object
- com.smartgwt.client.docs.serverds.Mail

```
public class Mail
extends java.lang.Object
```
A Mail object describes an email that will be sent automatically by the Smart GWT Server as part of a normal DataSource operation.
This class is not meant to be created and used, it is actually documentation of settings allowed in a DataSource descriptor (.ds.xml file), for use with Smart GWT Pro Edition and above. See com.smartgwt.client.docs.serverds for how to use this documentation.
Mail definitions are part of an OperationBinding, and they can only be specified in a DataSource's XML definition. Despite the declarative nature of mail definitions, templating support via Velocity makes it very flexible; it is very easy to include values from records just fetched from permanent storage by this operation, for example. See VelocitySupport for an overview of Smart GWT Server's pervasive support for templated declarative operations using Velocity.
The default context for the message is the dsResponse.data; that is, $foo in the message refers to the field "foo" in the DataSource response (the equivalent of calling dsResponse.getFieldValue("foo") in Java). You also have access to the normal Velocity variables described in the overview linked to above.
If multiple records appear in the dsResponse, one message will be sent per record in the response unless "multiple" is set to false. This allows a set of recipients to be selected by a "fetch" operationBinding and messages sent to each. This also means that if no data is selected by a fetch or affected by an update, no mail is sent.
If you have the Transaction Chaining feature (available in Power and better versions), all of the variables normally accessible in other Velocity contexts are available in the message template as well, for example: $responseData.last('order').orderId
You can provide the body of the email directly in the messageTemplate tag, or you can provide a filename in the templateFile attribute, which tells Smart GWT to use the contents of that file as the body of the email. If you provide neither of these, your email will have no body; if you provide both, Smart GWT will ignore the file and just use the content directly provided.
Mail server configuration
The mail server to use for sending emails is configured in the server.properties file. The following values can be provided:
mail.system.mail.smtp.host: The name of the SMTP server to use; defaults to "localhost"
mail.system.mail.smtp.port: What port is the MTA listening on; defaults to 25
mail.system.mail.smtp.auth: Whether this server requires authentication; defaults to false
mail.system.mail.smtp.user: SMTP user, if authentication is on; no default
mail.system.mail.smtp.password: Password, if authentication is on; no default

Note that we will also pass any other properties that start mail.system through to the underlying Javamail Session object, so you can use Javamail features that aren't explicitly exposed by Smart GWT's mail support. For example, many cloud-based SMTP providers require that you issue a STARTTLS command before authenticating; you can achieve this by adding the following line to server.properties:
mail.system.mail.smtp.starttls.enable: true

Field Summary

Fields
Modifier and Type	Field and Description
`VelocityExpression`	`bcc` Comma-separated list of "BCC" recipients.
`VelocityExpression`	`cc` Comma-separated list of "CC" recipients.
`java.lang.String`	`contentType` Used to override the content-type header applied to the email.
`java.lang.String`	`encoding` Used to override the character encoding we apply to the email body.
`VelocityExpression`	`from` The email address the message will appear to come from.
`VelocityExpression`	`messageData` Allows you to specify an alternative source of substitution values for the templating process (by default, the data record(s) returned by the DataSource operation are used).
`VelocityExpression`	`messageTemplate` The text that will form the body of the mail message.
`java.lang.Boolean`	`multiple` By default, multiple mail messages are sent if the dsResponse contains multiple records.
`VelocityExpression`	`replyTo` An email address to indicate as the reply-to address on the message.
`VelocityExpression`	`subject` The string to appear in the subject line of the message.
`VelocityExpression`	`templateFile` Qualified name of the file containing the message template, relative to webroot.
`VelocityExpression`	`to` Comma-separated list of recipients.

Constructor Summary

Constructors
Constructor and Description

Mail()

Constructors
Constructor and Description
`Mail()`

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - contentType
```
public java.lang.String contentType
```
    Used to override the content-type header applied to the email. Primarily used to send HTML emails rather than plain text ones (use "text/html" to do this).
    Default value is null
  - messageTemplate
```
public VelocityExpression messageTemplate
```
    The text that will form the body of the mail message. Like all other String properties of Mail, you can use Velocity substitution variables in this property.
    You must specify either this property or templateFile, but clearly it makes no sense to specify them both.
    Default value is null
  - from
```
public VelocityExpression from
```
    The email address the message will appear to come from. Like all other String properties of Mail, you can use Velocity substitution variables in this property.
    If you specify a "From:" line in the body of your email, the from address will be parsed and this property will be ignored.
    Ordinarily, this property (or the parsed equivalent in the email body) is mandatory for all emails. However, if you specify the property mail.system.mail.smtp.from in server.properties, it will become the default "from" address, and this property becomes optional.
    Default value is null
  - multiple
```
public java.lang.Boolean multiple
```
    By default, multiple mail messages are sent if the dsResponse contains multiple records. Set this property to false to prevent this behavior.
    Default value is null
  - encoding
```
public java.lang.String encoding
```
    Used to override the character encoding we apply to the email body. If you do not set this property, it is derived from the server.properties setting mail.system.default.encoding, which is set to "UTF-8" by default. This setting should be appropriate for most use cases.
    Default value is null
  - to
```
public VelocityExpression to
```
    Comma-separated list of recipients. Like all other String properties of Mail, you can use Velocity substitution variables in this property.
    If you specify a "To:" line in the body of your email, recipient addresses will be parsed and this property will be ignored.
    Default value is null
  - replyTo
```
public VelocityExpression replyTo
```
    An email address to indicate as the reply-to address on the message. Like all other String properties of Mail, you can use Velocity substitution variables in this property.
    Default value is null
  - cc
```
public VelocityExpression cc
```
    Comma-separated list of "CC" recipients. Like all other String properties of Mail, you can use Velocity substitution variables in this property.
    If you specify a "Cc:" line in the body of your email, recipient addresses will be parsed and this property will be ignored.
    Default value is null
  - templateFile
```
public VelocityExpression templateFile
```
    Qualified name of the file containing the message template, relative to webroot. Like all the other VelocityExpression properties of Mail, you can use Velocity substitution variables in this property. The content itself (ie, the contents of the file named in this property) can also contain Velocity substitutions, of course.
    You must specify either this property or messageTemplate, but clearly it makes no sense to specify them both.
    Default value is null
  - bcc
```
public VelocityExpression bcc
```
    Comma-separated list of "BCC" recipients. Like all other String properties of Mail, you can use Velocity substitution variables in this property.
    If you specify a "Bcc:" line in the body of your email, recipient addresses will be parsed and this property will be ignored.
    Default value is null
  - messageData
```
public VelocityExpression messageData
```
    Allows you to specify an alternative source of substitution values for the templating process (by default, the data record(s) returned by the DataSource operation are used). If set, this VelocityExpression should evaluate to a Java Map object, or a Java List containing only Maps.
    For example, assuming you had suitable context stored in a Map that is held in the current session as attribute "foo", the following would cause the mail templating system to look in there for values when running substitution:
```
      messageData="$session.foo"
  
```
    Default value is null
  - subject
```
public VelocityExpression subject
```
    The string to appear in the subject line of the message. Like all other String properties of Mail, you can use Velocity substitution variables in this property.
    If you specify a "Subject:" line in the body of your email, the subject will be parsed and this property will be ignored.
    Default value is null
- Constructor Detail
  - Mail
```
public Mail()
```

Class Mail

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

contentType

messageTemplate

from

multiple

encoding

to

replyTo

cc

templateFile

bcc

messageData

subject

Constructor Detail

Mail