Azure Communication Common Java

MicrosoftOfficialCreated by Microsoft

Skill
Tool integration
Software development
MIT
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From the author

Azure Communication Services common utilities for Java. Use when working with CommunicationTokenCredential, user identifiers, token refresh, or shared authentication across ACS services.

— the description by Microsoft

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

The azure-communication-common-java library provides essential shared components for developers building applications with Azure Communication Services (ACS). It centralizes authentication logic, including support for static tokens and proactive token refreshing, and defines standardized identifier types for users, phone numbers, and Microsoft Teams identities. This library is a foundational dependency for integrating ACS features like chat and calling into Java-based services.

What it does

Manages authentication credentials for ACS services
Configures automatic, proactive token refresh mechanisms
Provides strongly-typed identifiers for ACS users, phone numbers, and Teams users
Supports Entra ID (Azure AD) authentication for advanced scenarios
Enables parsing and type-checking of communication identifiers
Handles multi-cloud environment configurations

When to use it

When building Java applications that integrate with Azure Communication Services
When you need to implement secure token management for long-lived client sessions
When working with diverse user identity types across communication channels
When you need to authenticate using Entra ID for Teams Phone Extensibility

Advantages

Simplifies token lifecycle management with built-in refresh options
Ensures type safety when handling different communication identifiers
Provides a consistent authentication interface across various ACS services
Supports modern Java development patterns like async token fetching

Usage examples

“How do I create a CommunicationTokenCredential with proactive refresh in Java?”: You instantiate a CommunicationTokenRefreshOptions object with a callback to your token service, set setRefreshProactively(true), and pass it to the CommunicationTokenCredential constructor.
“How can I represent a phone number identifier in my ACS Java code?”: Use the PhoneNumberIdentifier class, passing the E.164 formatted string to the constructor, which allows you to access both the phone number and the raw identifier string.

Install

Download the skill as a ZIP:
https://mp-staging.autogineer.com/agent-skills/microsoft/azure-communication-common-java/download

Unzip it into the cross-client skills folder of your project:

mkdir -p .agents/skills && unzip azure-communication-common-java.zip -d .agents/skills

Documentation by Microsoft

Azure Communication Common (Java)

Shared authentication utilities and data structures for Azure Communication Services.

Installation

<dependency>
    <groupId>com.azure</groupId>
    <artifactId>azure-communication-common</artifactId>
    <version>1.4.0</version>
</dependency>

Key Concepts

Class	Purpose
`CommunicationTokenCredential`	Authenticate users with ACS services
`CommunicationTokenRefreshOptions`	Configure automatic token refresh
`CommunicationUserIdentifier`	Identify ACS users
`PhoneNumberIdentifier`	Identify PSTN phone numbers
`MicrosoftTeamsUserIdentifier`	Identify Teams users
`UnknownIdentifier`	Generic identifier for unknown types

CommunicationTokenCredential

Static Token (Short-lived Clients)

import com.azure.communication.common.CommunicationTokenCredential;

// Simple static token - no refresh
String userToken = "<user-access-token>";
CommunicationTokenCredential credential = new CommunicationTokenCredential(userToken);

// Use with Chat, Calling, etc.
ChatClient chatClient = new ChatClientBuilder()
    .endpoint("https://<resource>.communication.azure.com")
    .credential(credential)
    .buildClient();

Proactive Token Refresh (Long-lived Clients)

import com.azure.communication.common.CommunicationTokenRefreshOptions;
import java.util.concurrent.Callable;

// Token refresher callback - called when token is about to expire
Callable<String> tokenRefresher = () -> {
    // Call your server to get a fresh token
    return fetchNewTokenFromServer();
};

// With proactive refresh
CommunicationTokenRefreshOptions refreshOptions = new CommunicationTokenRefreshOptions(tokenRefresher)
    .setRefreshProactively(true)      // Refresh before expiry
    .setInitialToken(currentToken);    // Optional initial token

CommunicationTokenCredential credential = new CommunicationTokenCredential(refreshOptions);

Async Token Refresh

import java.util.concurrent.CompletableFuture;

// Async token fetcher
Callable<String> asyncRefresher = () -> {
    CompletableFuture<String> future = fetchTokenAsync();
    return future.get();  // Block until token is available
};

CommunicationTokenRefreshOptions options = new CommunicationTokenRefreshOptions(asyncRefresher)
    .setRefreshProactively(true);

CommunicationTokenCredential credential = new CommunicationTokenCredential(options);

Entra ID (Azure AD) Authentication

import com.azure.identity.InteractiveBrowserCredentialBuilder;
import com.azure.communication.common.EntraCommunicationTokenCredentialOptions;
import java.util.Arrays;
import java.util.List;

// For Teams Phone Extensibility
InteractiveBrowserCredential entraCredential = new InteractiveBrowserCredentialBuilder()
    .clientId("<your-client-id>")
    .tenantId("<your-tenant-id>")
    .redirectUrl("<your-redirect-uri>")
    .build();

String resourceEndpoint = "https://<resource>.communication.azure.com";
List<String> scopes = Arrays.asList(
    "https://auth.msft.communication.azure.com/TeamsExtension.ManageCalls"
);

EntraCommunicationTokenCredentialOptions entraOptions = 
    new EntraCommunicationTokenCredentialOptions(entraCredential, resourceEndpoint)
        .setScopes(scopes);

CommunicationTokenCredential credential = new CommunicationTokenCredential(entraOptions);

Communication Identifiers

CommunicationUserIdentifier

import com.azure.communication.common.CommunicationUserIdentifier;

// Create identifier for ACS user
CommunicationUserIdentifier user = new CommunicationUserIdentifier("8:acs:resource-id_user-id");

// Get raw ID
String rawId = user.getId();

PhoneNumberIdentifier

import com.azure.communication.common.PhoneNumberIdentifier;

// E.164 format phone number
PhoneNumberIdentifier phone = new PhoneNumberIdentifier("+14255551234");

String phoneNumber = phone.getPhoneNumber();  // "+14255551234"
String rawId = phone.getRawId();              // "4:+14255551234"

MicrosoftTeamsUserIdentifier

import com.azure.communication.common.MicrosoftTeamsUserIdentifier;

// Teams user identifier
MicrosoftTeamsUserIdentifier teamsUser = new MicrosoftTeamsUserIdentifier("<teams-user-id>")
    .setCloudEnvironment(CommunicationCloudEnvironment.PUBLIC);

// For anonymous Teams users
MicrosoftTeamsUserIdentifier anonymousTeamsUser = new MicrosoftTeamsUserIdentifier("<teams-user-id>")
    .setAnonymous(true);

UnknownIdentifier

import com.azure.communication.common.UnknownIdentifier;

// For identifiers of unknown type
UnknownIdentifier unknown = new UnknownIdentifier("some-raw-id");

Identifier Parsing

import com.azure.communication.common.CommunicationIdentifier;
import com.azure.communication.common.CommunicationIdentifierModel;

// Parse raw ID to appropriate type
public CommunicationIdentifier parseIdentifier(String rawId) {
    if (rawId.startsWith("8:acs:")) {
        return new CommunicationUserIdentifier(rawId);
    } else if (rawId.startsWith("4:")) {
        String phone = rawId.substring(2);
        return new PhoneNumberIdentifier(phone);
    } else if (rawId.startsWith("8:orgid:")) {
        String teamsId = rawId.substring(8);
        return new MicrosoftTeamsUserIdentifier(teamsId);
    } else {
        return new UnknownIdentifier(rawId);
    }
}

Type Checking Identifiers

import com.azure.communication.common.CommunicationIdentifier;

public void processIdentifier(CommunicationIdentifier identifier) {
    if (identifier instanceof CommunicationUserIdentifier) {
        CommunicationUserIdentifier user = (CommunicationUserIdentifier) identifier;
        System.out.println("ACS User: " + user.getId());
        
    } else if (identifier instanceof PhoneNumberIdentifier) {
        PhoneNumberIdentifier phone = (PhoneNumberIdentifier) identifier;
        System.out.println("Phone: " + phone.getPhoneNumber());
        
    } else if (identifier instanceof MicrosoftTeamsUserIdentifier) {
        MicrosoftTeamsUserIdentifier teams = (MicrosoftTeamsUserIdentifier) identifier;
        System.out.println("Teams User: " + teams.getUserId());
        System.out.println("Anonymous: " + teams.isAnonymous());
        
    } else if (identifier instanceof UnknownIdentifier) {
        UnknownIdentifier unknown = (UnknownIdentifier) identifier;
        System.out.println("Unknown: " + unknown.getId());
    }
}

Token Access

import com.azure.core.credential.AccessToken;

// Get current token (for debugging/logging - don't expose!)
CommunicationTokenCredential credential = new CommunicationTokenCredential(token);

// Sync access
AccessToken accessToken = credential.getToken();
System.out.println("Token expires: " + accessToken.getExpiresAt());

// Async access
credential.getTokenAsync()
    .subscribe(token -> {
        System.out.println("Token: " + token.getToken().substring(0, 20) + "...");
        System.out.println("Expires: " + token.getExpiresAt());
    });

Dispose Credential

// Clean up when done
credential.close();

// Or use try-with-resources
try (CommunicationTokenCredential cred = new CommunicationTokenCredential(options)) {
    // Use credential
    chatClient.doSomething();
}

Cloud Environments

import com.azure.communication.common.CommunicationCloudEnvironment;

// Available environments
CommunicationCloudEnvironment publicCloud = CommunicationCloudEnvironment.PUBLIC;
CommunicationCloudEnvironment govCloud = CommunicationCloudEnvironment.GCCH;
CommunicationCloudEnvironment dodCloud = CommunicationCloudEnvironment.DOD;

// Set on Teams identifier
MicrosoftTeamsUserIdentifier teamsUser = new MicrosoftTeamsUserIdentifier("<user-id>")
    .setCloudEnvironment(CommunicationCloudEnvironment.GCCH);

Environment Variables

AZURE_COMMUNICATION_ENDPOINT=https://<resource>.communication.azure.com
AZURE_COMMUNICATION_USER_TOKEN=<user-access-token>

Best Practices

Proactive Refresh - Always use setRefreshProactively(true) for long-lived clients
Token Security - Never log or expose full tokens
Close Credentials - Dispose of credentials when no longer needed
Error Handling - Handle token refresh failures gracefully
Identifier Types - Use specific identifier types, not raw strings

Common Usage Patterns

// Pattern: Create credential for Chat/Calling client
public ChatClient createChatClient(String token, String endpoint) {
    CommunicationTokenRefreshOptions refreshOptions = 
        new CommunicationTokenRefreshOptions(this::refreshToken)
            .setRefreshProactively(true)
            .setInitialToken(token);
    
    CommunicationTokenCredential credential = 
        new CommunicationTokenCredential(refreshOptions);
    
    return new ChatClientBuilder()
        .endpoint(endpoint)
        .credential(credential)
        .buildClient();
}

private String refreshToken() {
    // Call your token endpoint
    return tokenService.getNewToken();
}

Trigger Phrases

"ACS authentication", "communication token credential"
"user access token", "token refresh"
"CommunicationUserIdentifier", "PhoneNumberIdentifier"
"Azure Communication Services authentication"

Files

ATTRIBUTION.mdAdded by AutoGineer1000 B
LICENSELicence file added by AutoGineer1.1 KiB
SKILL.md9.5 KiB
references/examples.md14.3 KiB

Requirements and compatibility

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Security

No issues found by our static scan· No issues found

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Attribution and licence

Created by

Microsoft

Publisher

Microsoft (Official)

Source

microsoft/skills · .github/plugins/azure-sdk-java/skills/azure-communication-common-java · commit 0696600

Licence

MIT License (redistribution allowed)

LICENSE (added by AutoGineer from LICENSE)
ATTRIBUTION.md (written by AutoGineer)

Synced

2026-11-08

AutoGineer is not affiliated with or endorsed by Microsoft.

Download ZIP

The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download azure-communication-common-java.zip