Twilio is a 3rd party application used to send SMS and make voice calls from our application. It allows us to send the SMS and make voice calls programmatically.
In this blog, you are going to learn how to implement the SMS sending and making voice calls by using Spring Boot with Twilio.
Note − We used the Trail account in Twilio to send the SMS and making voice calls. You can learn more about Twilio at www.twilio.com.
First, we need to add the Twilio dependency in our build configuration file.
Maven users can add the following dependency in the pom.xml file.
<dependency>
<groupId>com.twilio.sdk</groupId>
<artifactId>twilio</artifactId>
<version>7.16.1</version>
</dependency>
Gradle users can add the following dependency in the build.gradle file.
compile group: “com.twilio.sdk”, name:”twilio”, version: “7.16.1”
Now, initialize the Twilio account with ACCOUNT_SID and AUTH_ID in static block as shown −
static {
Twilio.init(ACCOUNT_SID, AUTH_ID);
}

Sending SMS

To send the SMS, we need to provide a from-number and to-number to the Message.create() method. Message body content also we need to provide for the method Message.creator()as shown −
Message.creator(new PhoneNumber(“to-number”), new PhoneNumber(“from-number”),
“Message from Spring Boot Application”).create();
The main Spring Boot application class file looks below.
package com.tecklearn.smsdemo;

import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import com.twilio.Twilio;
import com.twilio.rest.api.v2010.account.Message;
import com.twilio.type.PhoneNumber;

@SpringBootApplication
public class SmsdemoApplication implements ApplicationRunner {
private final static String ACCOUNT_SID = “<your-account-sid>”;
private final static String AUTH_ID = “<your-auth-id>”;

static {
Twilio.init(ACCOUNT_SID, AUTH_ID);
}
public static void main(String[] args) {
SpringApplication.run(SmsdemoApplication.class, args);
}
@Override
public void run(ApplicationArguments arg0) throws Exception {
Message.creator(new PhoneNumber(“to-number”), new PhoneNumber(“from-number”),
“Message from Spring Boot Application”).create();
}
}
The complete code to build configuration file is given below −
Maven – pom.xml
<?xml version = “1.0” encoding = “UTF-8”?>
<project xmlns = “http://maven.apache.org/POM/4.0.0”
xmlns:xsi = “http://www.w3.org/2001/XMLSchema-instance”
xsi:schemaLocation = “http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd”>

<modelVersion>4.0.0</modelVersion>
<groupId>com.tecklearn</groupId>
<artifactId>smsdemo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>smsdemo</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath /> <!– lookup parent from repository –>
</parent>

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.twilio.sdk</groupId>
<artifactId>twilio</artifactId>
<version>7.16.1</version>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>
Gradle – build.gradle
buildscript {
ext {
springBootVersion = ‘1.5.9.RELEASE’
}
repositories {
mavenCentral()
}
dependencies {
classpath(“org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}”)
}
}
apply plugin: ‘java’
apply plugin: ‘eclipse’
apply plugin: ‘org.springframework.boot’

group = ‘com.tecklearn’
version = ‘0.0.1-SNAPSHOT’
sourceCompatibility = 1.8

Voice Calls

To make voice calls by using Twilio, we need to call the Call.creator() method. For this method, we need to provide a to-number, from-number, and voice-note as shown here.
Call.creator(new PhoneNumber(“<to-number>”), new PhoneNumber(“<from-number>”),
new URI(“http://demo.twilio.com/docs/voice.xml”)).create();
The code for main Spring Boot application class file is given below.
package com.tecklearn.smsdemo;

import java.net.URI;

import com.twilio.Twilio;
import com.twilio.rest.api.v2010.account.Call;
import com.twilio.type.PhoneNumber;

@SpringBootApplication
public class SmsdemoApplication implements ApplicationRunner {
private final static String ACCOUNT_SID = “<ACCOUNT-SID>”;
private final static String AUTH_ID = “AUTH-ID”;

static {
Twilio.init(ACCOUNT_SID, AUTH_ID);
}
public static void main(String[] args) {
SpringApplication.run(SmsdemoApplication.class, args);
}
@Override
public void run(ApplicationArguments arg0) throws Exception {
Call.creator(new PhoneNumber(“<to-number>”), new PhoneNumber(“<from-number>”),
new URI(“http://demo.twilio.com/docs/voice.xml”)).create();
}
}
The code for complete build configuration file is given below −
Maven – pom.xml
<?xml version = “1.0” encoding = “UTF-8”?>
<project xmlns = “http://maven.apache.org/POM/4.0.0”
xmlns:xsi = “http://www.w3.org/2001/XMLSchema-instance”
xsi:schemaLocation = “http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd”>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

apply plugin: ‘java’
apply plugin: ‘eclipse’
apply plugin: ‘org.springframework.boot’

group = ‘com.tecklearn’
version = ‘0.0.1-SNAPSHOT’
sourceCompatibility = 1.8

repositories {
mavenCentral()
}
dependencies {
compile(‘org.springframework.boot:spring-boot-starter’)
testCompile(‘org.springframework.boot:spring-boot-starter-test’)
compile group: “com.twilio.sdk”, name:”twilio”, version: “7.11.+”
}
You can create an executable JAR file, and run the Spring Boot application by using the following Maven or Gradle commands.
For Maven, use the command as shown −
mvn clean install
After “BUILD SUCCESS”, you can find the JAR file under the target directory.
For Gradle, use the command as shown −
gradle clean build
After “BUILD SUCCESSFUL”, you can find the JAR file under the build/libs directory.
Now, run the JAR file by using the command given here −
java –jar <JARFILE>
Now, you will receive call to your “to-number” from Twilio.
Press any key after attending the call, you will hear the voice note from https://demo.twilio.com/docs/voice.xml
Note − In this example, we used the Trail account. So, you should verify the numbers before making calls.
So, this brings us to the end of blog. This Tecklearn ‘How to implement the SMS sending and making voice calls by using Spring Boot with Twilio’ blog helps you with commonly asked questions if you are looking out for a job in Java Programming. If you wish to learn Spring Boot and build a career Java Programming domain, then check out our interactive, Java and JEE Training, that comes with 24*7 support to guide you throughout your learning period. Please find the link for course details:

Java and JEE Training

Java and JEE Training

About the Course

Java and JEE Certification Training is designed by professionals as per the industrial requirements and demands. This training encompasses comprehensive knowledge on basic and advanced concepts of core Java & J2EE along with popular frameworks like Hibernate, Spring & SOA. In this course, you will gain expertise in concepts like Java Array, Java OOPs, Java Function, Java Loops, Java Collections, Java Thread, Java Servlet, and Web Services using industry use-cases and this will help you to become a certified Java expert.

Why Should you take Java and JEE Training?

• Java developers are in great demand in the job market. With average pay going between $90,000/- to $120,000/- depending on your experience and the employers.
• Used by more than 10 Million developers worldwide to develop applications for 15 Billion devices.
• Java is one of the most popular programming languages in the software world. Rated #1 in TIOBE Popular programming languages index (15th Consecutive Year)

What you will Learn in this Course?

Introduction to Java
• Java Fundamentals
• Introduction to Java Basics
• Features of Java
• Various components of Java language
• Benefits of Java over other programming languages
• Key Benefits of Java
Installation and IDE’s for Java Programming Language
• Installation of Java
• Setting up of Eclipse IDE
• Components of Java Program
• Editors and IDEs used for Java Programming
• Writing a Simple Java Program
Data Handling and Functions
• Data types, Operations, Compilation process, Class files, Loops, Conditions
• Using Loop Constructs
• Arrays- Single Dimensional and Multi-Dimensional
• Functions
• Functions with Arguments
OOPS in Java: Concept of Object Orientation
• Object Oriented Programming in Java
• Implement classes and objects in Java
• Create Class Constructors
• Overload Constructors
• Inheritance
• Inherit Classes and create sub-classes
• Implement abstract classes and methods
• Use static keyword
• Implement Interfaces and use it
Polymorphism, Packages and String Handling
• Concept of Static and Run time Polymorphism
• Function Overloading
• String Handling –String Class
• Java Packages
Exception Handling and Multi-Threading
• Exception handling
• Various Types of Exception Handling
• Introduction to multi-threading in Java
• Extending the thread class
• Synchronizing the thread
File Handling in Java
• Input Output Streams
• Java.io Package
• File Handling in Java
Java Collections
• Wrapper Classes and Inner Classes: Integer, Character, Boolean, Float etc
• Applet Programs: How to write UI programs with Applet, Java.lang, Java.io, Java.util
• Collections: ArrayList, Vector, HashSet, TreeSet, HashMap, HashTable
Java Database Connectivity (JDBC)
• Introduction to SQL: Connect, Insert, Update, Delete, Select
• Introduction to JDBC and Architecture of JDBC
• Insert/Update/Delete/Select Operations using JDBC
• Batch Processing Transaction
• Management: Commit and Rollback
Java Enterprise Edition – Servlets
• Introduction to J2EE
• Client Server architecture
• URL, Port Number, Request, Response
• Need for servlets
• Servlet fundamentals
• Setting up a web project in Eclipse
• Configuring and running the web app with servlets
• GET and POST request in web application with demo
• Servlet lifecycle
• Servlets Continued
• Session tracking and filter
• Forward and include Servlet request dispatchers
Java Server Pages (JSP)
• Fundamentals of Java Server Page
• Writing a code using JSP
• The architecture of JSP
• JSP Continued
• JSP elements: Scriptlets, expressions, declaration
• JSP standard actions
• JSP directives
• Introduction to JavaBeans
• ServletConfig and ServletContext
• Servlet Chaining
• Cookies Management
• Session Management
Hibernate
• Introduction to Hibernate
• Introduction to ORM
• ORM features
• Hibernate as an ORM framework
• Hibernate features
• Setting up a project with Hibernate framework
• Basic APIs needed to do CRUD operations with Hibernate
• Hibernate Architecture
POJO (Plain Old Java Object)
• POJO (Plain Old Java Object)
• Persistent Objects
• Lifecycle of Persistent Object
Spring
• Introduction to Spring
• Spring Fundamentals
• Advanced Spring
Got a question for us? Please mention it in the comments section and we will get back to you.

406