rootcastleco/rei-skills/azure-communication-common-java

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

Install

npx vskill@latest install rootcastleco/rei-skills/azure-communication-common-java

SKILL.md

Azure Communication Common (Java)

Shared authentication utilities and data structures for Azure Communication Services.

Installation

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

Key Concepts

ClassPurpose
CommunicationTokenCredentialAuthenticate users with ACS services
CommunicationTokenRefreshOptionsConfigure automatic token refresh
CommunicationUserIdentifierIdentify ACS users
PhoneNumberIdentifierIdentify PSTN phone numbers
MicrosoftTeamsUserIdentifierIdentify Teams users
UnknownIdentifierGeneric identifier for unknown types

CommunicationTokenCredential

Static Token (Short-lived Clients)
java
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)
java
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
java
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

java
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
java
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
java
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
java
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
java
import com.azure.communication.common.UnknownIdentifier;
// For identifiers of unknown type
UnknownIdentifier unknown = new UnknownIdentifier("some-raw-id");

Identifier Parsing

java
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

java
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

java
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

java
// Clean up when done
credential.close();
// Or use try-with-resources
try (CommunicationTokenCredential cred = new CommunicationTokenCredential(options)) {
// Use credential
chatClient.doSomething();
}

Cloud Environments

java
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

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

Best Practices

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

Common Usage Patterns

java
// 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"

When to Use

This skill is applicable to execute the workflow or actions described in the overview.


🏰 Rei Skills — Curated by Rootcastle Engineering & Innovation | Batuhan Ayrıbaş
Engineering Beyond Boundaries | admin@rootcastle.com

Security

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Source

Popularity

Repository stars
6
Repository forks
2
7-day trend score
15

Stars and forks are for the whole GitHub repository, not this skill alone. Not refreshed yet.

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