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Build call automation workflows with Azure Communication Services Call Automation Java SDK. Use when implementing IVR systems, call routing, call recording, DTMF recognition, text-to-speech, or AI-pow
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Paste the copied command in a terminal. It installs this SKILL.md into that agent.
npx skills add microsoft/skills --skill azure-communication-callautomation-java -a cursor -y
Build call automation workflows with Azure Communication Services Call Automation Java SDK. Use when implementing IVR systems, call routing, call recording, DTMF recognition, text-to-speech, or AI-powered call flows.
Build call automation workflows with Azure Communication Services Call Automation Java SDK. Use when implementing IVR systems, call routing, call recording, DTMF recognition, text-to-speech, or AI-powered call flows.
Build server-side call automation workflows including IVR systems, call routing, recording, and AI-powered interactions.
<dependency>
<groupId>com.azure</groupId>
<artifactId>azure-communication-callautomation</artifactId>
<version>1.6.0</version>
</dependency>
import com.azure.communication.callautomation.CallAutomationClient;
import com.azure.communication.callautomation.CallAutomationClientBuilder;
import com.azure.core.credential.TokenCredential;
import com.azure.identity.AzureIdentityEnvVars;
import com.azure.identity.DefaultAzureCredentialBuilder;
import com.azure.identity.ManagedIdentityCredentialBuilder;
// Local dev: DefaultAzureCredential. Production: set AZURE_TOKEN_CREDENTIALS=prod or AZURE_TOKEN_CREDENTIALS=<specific_credential>
TokenCredential credential = new DefaultAzureCredentialBuilder()
.requireEnvVars(AzureIdentityEnvVars.AZURE_TOKEN_CREDENTIALS)
.build();
// Or use a specific credential directly in production:
// See https://learn.microsoft.com/java/api/overview/azure/identity-readme?view=azure-java-stable#credential-classes
// TokenCredential credential = new ManagedIdentityCredentialBuilder().build();
// With DefaultAzureCredential
CallAutomationClient client = new CallAutomationClientBuilder()
.endpoint("https://<resource>.communication.azure.com")
.credential(credential)
.buildClient();
// With connection string
CallAutomationClient client = new CallAutomationClientBuilder()
.connectionString("<connection-string>")
.buildClient();
| Class | Purpose |
|---|---|
CallAutomationClient | Make calls, answer/reject incoming calls, redirect calls |
CallConnection | Actions in established calls (add participants, terminate) |
CallMedia | Media operations (play audio, recognize DTMF/speech) |
CallRecording | Start/stop/pause recording |
CallAutomationEventParser | Parse webhook events from ACS |
import com.azure.communication.callautomation.models.*;
import com.azure.communication.common.CommunicationUserIdentifier;
import com.azure.communication.common.PhoneNumberIdentifier;
// Call to PSTN number
PhoneNumberIdentifier target = new PhoneNumberIdentifier("+14255551234");
PhoneNumberIdentifier caller = new PhoneNumberIdentifier("+14255550100");
CreateCallOptions options = new CreateCallOptions(
new CommunicationUserIdentifier("<user-id>"), // Source
List.of(target)) // Targets
.setSourceCallerId(caller)
.setCallbackUrl("https://your-app.com/api/callbacks");
CreateCallResult result = client.createCall(options);
String callConnectionId = result.getCallConnectionProperties().getCallConnectionId();
// From Event Grid webhook - IncomingCall event
String incomingCallContext = "<incoming-call-context-from-event>";
AnswerCallOptions options = new AnswerCallOptions(
incomingCallContext,
"https://your-app.com/api/callbacks");
AnswerCallResult result = client.answerCall(options);
CallConnection callConnection = result.getCallConnection();
CallConnection callConnection = client.getCallConnection(callConnectionId);
CallMedia callMedia = callConnection.getCallMedia();
// Play text-to-speech
TextSource textSource = new TextSource()
.setText("Welcome to Contoso. Press 1 for sales, 2 for support.")
.setVoiceName("en-US-JennyNeural");
PlayOptions playOptions = new PlayOptions(
List.of(textSource),
List.of(new CommunicationUserIdentifier("<target-user>")));
callMedia.play(playOptions);
// Play audio file
FileSource fileSource = new FileSource()
.setUrl("https://storage.blob.core.windows.net/audio/greeting.wav");
callMedia.play(new PlayOptions(List.of(fileSource), List.of(target)));
// Recognize DTMF tones
DtmfTone stopTones = DtmfTone.POUND;
CallMediaRecognizeDtmfOptions recognizeOptions = new CallMediaRecognizeDtmfOptions(
new CommunicationUserIdentifier("<target-user>"),
5) // Max tones to collect
.setInterToneTimeout(Duration.ofSeconds(5))
.setStopTones(List.of(stopTones))
.setInitialSilenceTimeout(Duration.ofSeconds(15))
.setPlayPrompt(new TextSource().setText("Enter your account number followed by pound."));
callMedia.startRecognizing(recognizeOptions);
// Speech recognition with AI
CallMediaRecognizeSpeechOptions speechOptions = new CallMediaRecognizeSpeechOptions(
new CommunicationUserIdentifier("<target-user>"))
.setEndSilenceTimeout(Duration.ofSeconds(2))
.setSpeechLanguage("en-US")
.setPlayPrompt(new TextSource().setText("How can I help you today?"));
callMedia.startRecognizing(speechOptions);
CallRecording callRecording = client.getCallRecording();
// Start recording
StartRecordingOptions recordingOptions = new StartRecordingOptions(
new ServerCallLocator("<server-call-id>"))
.setRecordingChannel(RecordingChannel.MIXED)
.setRecordingContent(RecordingContent.AUDIO_VIDEO)
.setRecordingFormat(RecordingFormat.MP4);
RecordingStateResult recordingResult = callRecording.start(recordingOptions);
String recordingId = recordingResult.getRecordingId();
// Pause/resume/stop
callRecording.pause(recordingId);
callRecording.resume(recordingId);
callRecording.stop(recordingId);
// Download recording (after RecordingFileStatusUpdated event)
callRecording.downloadTo(recordingUrl, Paths.get("recording.mp4"));
CallConnection callConnection = client.getCallConnection(callConnectionId);
CommunicationUserIdentifier participant = new CommunicationUserIdentifier("<user-id>");
AddParticipantOptions addOptions = new AddParticipantOptions(participant)
.setInvitationTimeout(Duration.ofSeconds(30));
AddParticipantResult result = callConnection.addParticipant(addOptions);
// Blind transfer
PhoneNumberIdentifier transferTarget = new PhoneNumberIdentifier("+14255559999");
TransferCallToParticipantResult result = callConnection.transferCallToParticipant(transferTarget);
import com.azure.communication.callautomation.CallAutomationEventParser;
import com.azure.communication.callautomation.models.events.*;
// In your webhook endpoint
public void handleCallback(String requestBody) {
List<CallAutomationEventBase> events = CallAutomationEventParser.parseEvents(requestBody);
for (CallAutomationEventBase event : events) {
if (event instanceof CallConnected) {
CallConnected connected = (CallConnected) event;
System.out.println("Call connected: " + connected.getCallConnectionId());
} else if (event instanceof RecognizeCompleted) {
RecognizeCompleted recognized = (RecognizeCompleted) event;
// Handle DTMF or speech recognition result
DtmfResult dtmfResult = (DtmfResult) recognized.getRecognizeResult();
String tones = dtmfResult.getTones().stream()
.map(DtmfTone::toString)
.collect(Collectors.joining());
System.out.println("DTMF received: " + tones);
} else if (event instanceof PlayCompleted) {
System.out.println("Audio playback completed");
} else if (event instanceof CallDisconnected) {
System.out.println("Call ended");
}
}
}
// Hang up for all participants
callConnection.hangUp(true);
// Hang up only this leg
callConnection.hangUp(false);
import com.azure.core.exception.HttpResponseException;
try {
client.answerCall(options);
} catch (HttpResponseException e) {
if (e.getResponse().getStatusCode() == 404) {
System.out.println("Call not found or already ended");
} else if (e.getResponse().getStatusCode() == 400) {
System.out.println("Invalid request: " + e.getMessage());
}
}
AZURE_COMMUNICATION_ENDPOINT=https://<resource>.communication.azure.com # Required for all auth methods
AZURE_COMMUNICATION_CONNECTION_STRING=endpoint=https://...;accesskey=... # Alternative to Entra ID auth
CALLBACK_BASE_URL=https://your-app.com/api/callbacks # Required for webhook callbacks
AZURE_TOKEN_CREDENTIALS=prod # Required only if DefaultAzureCredential is used in production