Created sendgrid email template, how to call it from Java - sendgrid

Question

I have created email template in sendgrid - with substitutable values;
I get the JSON payload (contains substitute values) for processing email from rabbitMQ queue. My question is how to call the sendgrid email template from Java?

Answer 1

I found the solution, the way to call sendgrid template and email through sendgrid as below:
SendGrid sendGrid = new SendGrid("username","password"));
SendGrid.Email email = new SendGrid.Email();
//Fill the required fields of email
email.setTo(new String[] { "xyz_to#gmail.com"});
email.setFrom("xyz_from#gmail.com");
email.setSubject(" ");
email.setText(" ");
email.setHtml(" ");
// Substitute template ID
email.addFilter(
"templates",
"template_id",
"1231_1212_2323_3232");
//place holders in template, dynamically fill values in template
email.addSubstitution(
":firstName",
new String[] { firstName });
email.addSubstitution(
":lastName",
new String[] { lastName });
// send your email
Response response = sendGrid.send(email);

Answer 2

This is my working soloution .
import com.fasterxml.jackson.annotation.JsonProperty;
import com.sendgrid.*;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
public class MailUtil {
public static void main(String[] args) throws IOException {
Email from = new Email();
from.setEmail("fromEmail");
from.setName("Samay");
String subject = "Sending with SendGrid is Fun";
Email to = new Email();
to.setName("Sam");
to.setEmail("ToEmail");
DynamicTemplatePersonalization personalization = new DynamicTemplatePersonalization();
personalization.addTo(to);
Mail mail = new Mail();
mail.setFrom(from);
personalization.addDynamicTemplateData("name", "Sam");
mail.addPersonalization(personalization);
mail.setTemplateId("TEMPLATE-ID");
SendGrid sg = new SendGrid("API-KEY");
Request request = new Request();
try {
request.setMethod(Method.POST);
request.setEndpoint("mail/send");
request.setBody(mail.build());
Response response = sg.api(request);
System.out.println(response.getStatusCode());
System.out.println(response.getBody());
System.out.println(response.getHeaders());
} catch (IOException ex) {
throw ex;
}
}
private static class DynamicTemplatePersonalization extends Personalization {
#JsonProperty(value = "dynamic_template_data")
private Map<String, String> dynamic_template_data;
#JsonProperty("dynamic_template_data")
public Map<String, String> getDynamicTemplateData() {
if (dynamic_template_data == null) {
return Collections.<String, String>emptyMap();
}
return dynamic_template_data;
}
public void addDynamicTemplateData(String key, String value) {
if (dynamic_template_data == null) {
dynamic_template_data = new HashMap<String, String>();
dynamic_template_data.put(key, value);
} else {
dynamic_template_data.put(key, value);
}
}
}
}

Answer 3

Here is an example from last API spec:
import com.sendgrid.*;
import java.io.IOException;
public class Example {
public static void main(String[] args) throws IOException {
Email from = new Email("test#example.com");
String subject = "I'm replacing the subject tag";
Email to = new Email("test#example.com");
Content content = new Content("text/html", "I'm replacing the <strong>body tag</strong>");
Mail mail = new Mail(from, subject, to, content);
mail.personalization.get(0).addSubstitution("-name-", "Example User");
mail.personalization.get(0).addSubstitution("-city-", "Denver");
mail.setTemplateId("13b8f94f-bcae-4ec6-b752-70d6cb59f932");
SendGrid sg = new SendGrid(System.getenv("SENDGRID_API_KEY"));
Request request = new Request();
try {
request.setMethod(Method.POST);
request.setEndpoint("mail/send");
request.setBody(mail.build());
Response response = sg.api(request);
System.out.println(response.getStatusCode());
System.out.println(response.getBody());
System.out.println(response.getHeaders());
} catch (IOException ex) {
throw ex;
}
}
}
https://github.com/sendgrid/sendgrid-java/blob/master/USE_CASES.md

Answer 4

Recently Sendgrid upgraded the Maven version v4.3.0 so you don't have to create additional classes for dynamic data content. Read more from this link https://github.com/sendgrid/sendgrid-java/pull/449

Answer 5

If you're doing a spring-boot maven project, You'll need to add the sendgrid-java maven dependency in your pom.xml. Likewise, in your application.properties file under resource folder of the project, add SENDGRID API KEY AND TEMPLATE ID under attributes such as spring.sendgrid.api-key=SG.xyz and templateId=d-cabc respectively.
Having done the pre-setups. You can create a simple controller class as the one given below:
Happy Coding!
#RestController
#RequestMapping("/sendgrid")
public class MailResource {
private final SendGrid sendGrid;
#Value("${templateId}")
private String EMAIL_TEMPLATE_ID;
public MailResource(SendGrid sendGrid) {
this.sendGrid = sendGrid;
}
#GetMapping("/test")
public String sendEmailWithSendGrid(#RequestParam("msg") String message) {
Email from = new Email("bijay.shrestha#f1soft.com");
String subject = "Welcome Fonesal Unit to SendGrid";
Email to = new Email("birat.bohora#f1soft.com");
Content content = new Content("text/html", message);
Mail mail = new Mail(from, subject, to, content);
mail.setReplyTo(new Email("bijay.shrestha#f1soft.com"));
mail.setTemplateId(EMAIL_TEMPLATE_ID);
Request request = new Request();
Response response = null;
try {
request.setMethod(Method.POST);
request.setEndpoint("mail/send");
request.setBody(mail.build());
response = sendGrid.api(request);
System.out.println(response.getStatusCode());
System.out.println(response.getBody());
System.out.println(response.getHeaders());
} catch (IOException ex) {
System.out.println(ex.getMessage());
}
return "Email was successfully sent";
}
}

Answer 6

This is based on verision com.sendgrid:sendgrid-java:4.8.3
Email from = new Email(fromEmail);
Email to = new Email(toEmail);
String subject = "subject";
Content content = new Content(TEXT_HTML, "dummy value");
Mail mail = new Mail(from, subject, to, content);
// Using template to send Email, so subject and content will be ignored
mail.setTemplateId(request.getTemplateId());
SendGrid sendGrid = new SendGrid(SEND_GRID_API_KEY);
Request sendRequest = new Request();
sendRequest.setMethod(Method.POST);
sendRequest.setEndpoint("mail/send");
sendRequest.setBody(mail.build());
Response response = sendGrid.api(sendRequest);
You can also find fully example here:
Full Email object Java example