twilio-java

Documentation

The documentation for the Twilio API can be found here.

The Java library documentation can be found here.

Versions

twilio-java uses a modified version of Semantic Versioning for all changes. See this document for details.

TLS 1.2 Requirements

New accounts and subaccounts are now required to use TLS 1.2 when accessing the REST API. "Upgrade Required" errors indicate that TLS 1.0/1.1 is being used.

Supported Java Versions

This library supports the following Java implementations:

OpenJDK 8
OpenJDK 11
OpenJDK 17
OracleJDK 8
OracleJDK 11
OracleJDK 17

For Java 7 support, use twilio-java major version 7.X.X.

Installation

twilio-java uses Maven. At present the jars are available from a public maven repository.

Use the following dependency in your project to grab via Maven:

<dependency>
  <groupId>com.twilio.sdk</groupId>
  <artifactId>twilio</artifactId>
  <version>9.X.X</version>
  <scope>compile</scope>
</dependency>

or Gradle:

implementation "com.twilio.sdk:twilio:9.X.X"

If you want to compile it yourself, here's how:

git clone git@github.com:twilio/twilio-java
cd twilio-java
mvn install       # Requires maven, download from https://maven.apache.org/download.html

If you want to build your own .jar, execute the following from within the cloned directory:

mvn package

If you run into trouble with local tests, use:

mvn package -Dmaven.test.skip=true

Test your installation

Try sending yourself an SMS message, like this:

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

public class Example {

  // Find your Account Sid and Token at console.twilio.com
  public static final String ACCOUNT_SID = "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
  public static final String AUTH_TOKEN = "your_auth_token";

  public static void main(String[] args) {
    Twilio.init(ACCOUNT_SID, AUTH_TOKEN);

    Message message = Message
      .creator(
        new PhoneNumber("+15558675309"),
        new PhoneNumber("+15017250604"),
        "This is the ship that made the Kessel Run in fourteen parsecs?"
      )
      .create();

    System.out.println(message.getSid());
  }
}

Warning It's okay to hardcode your credentials when testing locally, but you should use environment variables to keep them secret before committing any code or deploying to production. Check out How to Set Environment Variables for more information.

Usage

Initialize the Client

import com.twilio.Twilio;
import com.twilio.exception.AuthenticationException;

public class Example {

  private static final String ACCOUNT_SID =
    "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
  private static final String AUTH_TOKEN = "your_auth_token";

  public static void main(String[] args) throws AuthenticationException {
    Twilio.init(ACCOUNT_SID, AUTH_TOKEN);
  }
}

Environment Variables

twilio-java supports the credentials, region, and edge values stored in the following environment variables:

TWILIO_ACCOUNT_SID
TWILIO_AUTH_TOKEN
TWILIO_REGION
TWILIO_EDGE

If using these variables, the above client initialization can be skipped.

Make a Call

import com.twilio.Twilio;
import com.twilio.rest.api.v2010.account.Call;
import com.twilio.type.PhoneNumber;
import java.net.URI;
import java.net.URISyntaxException;

public class Example {

  public static final String ACCOUNT_SID = "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
  public static final String AUTH_TOKEN = "your_auth_token";

  public static void main(String[] args) throws URISyntaxException {
    Twilio.init(ACCOUNT_SID, AUTH_TOKEN);

    Call call = Call
      .creator(
        new PhoneNumber("+14155551212"),
        new PhoneNumber("+15017250604"),
        new URI("http://demo.twilio.com/docs/voice.xml")
      )
      .create();

    System.out.println(call.getSid());
  }
}

Get an existing Call

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

public class Example {

  public static final String ACCOUNT_SID = "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
  public static final String AUTH_TOKEN = "your_auth_token";

  public static void main(String[] args) {
    Twilio.init(ACCOUNT_SID, AUTH_TOKEN);

    Call call = Call.fetcher("CA42ed11f93dc08b952027ffbc406d0868").fetch();

    System.out.println(call.getTo());
  }
}

Iterate through records

The library automatically handles paging for you. With the read method, you can specify the number of records you want to receive (limit) and the maximum size you want each page fetch to be (pageSize). The library will then handle the task for you, fetching new pages under the hood as you iterate over the records.

For more information, view the auto-generated library docs.

Use the `read` method

import com.twilio.Twilio;
import com.twilio.base.ResourceSet;
import com.twilio.rest.api.v2010.account.Call;

public class Example {

  public static final String ACCOUNT_SID = "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
  public static final String AUTH_TOKEN = "your_auth_token";

  public static void main(String[] args) {
    Twilio.init(ACCOUNT_SID, AUTH_TOKEN);

    ResourceSet<Call> calls = Call.reader().read();

    for (Call call : calls) {
      System.out.println(call.getDirection());
    }
  }
}

Specify Region and/or Edge

To take advantage of Twilio's Global Infrastructure, specify the target Region and/or Edge for the client:

Twilio.init(accountSid, authToken);
Twilio.setRegion("au1");
Twilio.setEdge("sydney");

This will result in the hostname transforming from api.twilio.com to api.sydney.au1.twilio.com.

Enable Debug Logging

This library uses SLF4J for logging. Consult the SFL4J documentation for information about logging configuration.

For example, if you are using log4j:

Make sure you have log4j-slf4j-impl, log4j-core and log4j-api in your pom.xml file

Define the logging level for the Twilio HTTP client in your configuration. For example, in src/main/resources/log4j2.xml:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level - %msg%n"/>
        </Console>
    </Appenders>
    <Loggers>
        <!--Your Twilio logging configuration goes here-->
        <Logger name="com.twilio.http" level="debug" additivity="false">
            <AppenderRef ref="Console"/>
        </Logger>
        <Root level="info">
            <AppenderRef ref="Console"/>
        </Root>
    </Loggers>
</Configuration>

Handle Exceptions

import com.twilio.exception.ApiException;

try {
    Message message = Message.creator(
        new PhoneNumber("+15558881234"),  // To number
        new PhoneNumber("+15559994321"),  // From number
        "Hello world!"                    // SMS body
    ).create();

    System.out.println(message.getSid());
} catch (final ApiException e) {
    System.err.println(e);
}

Use a Client With PKCV Authentication

Additional documentation here: https://twilio.com/docs/iam/pkcv/quickstart

ValidationClient httpClient = new ValidationClient(ACCOUNT_SID, key.getSid(), signingKey.getSid(), pair.getPrivate());
TwilioRestClient client = new TwilioRestClient.Builder(signingKey.getSid(), signingKey.getSecret())
    .accountSid(ACCOUNT_SID)
    .httpClient(httpClient)
    .build();

Generate TwiML

To control phone calls, your application needs to output TwiML.

TwiML in twilio-java now use the builder pattern!

TwiML twiml = new VoiceResponse.Builder()
    .say(new Say.Builder("Hello World!").build())
    .play(new Play.Builder("https://api.twilio.com/cowbell.mp3").loop(5).build())
    .build();

That will output XML that looks like this:

<Response>
    <Say>Hello World!</Say>
    <Play loop="5">https://api.twilio.com/cowbell.mp3</Play>
</Response>

Use a custom HTTP Client

To use a custom HTTP client with this helper library, please see the advanced example of how to do so.

Docker image

The Dockerfile present in this repository and its respective twilio/twilio-java Docker image are currently used by Twilio for testing purposes only.

Getting Help

If you need help installing or using the library, please check the Twilio Support Help Center first, and file a support ticket if you don't find an answer to your question.

If you've instead found a bug in the library or would like new features added, go ahead and open issues or pull requests against this repo!

License

jon-signal/twilio-java

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