Azure Communication Services common utilities for Java. Use when working with CommunicationTokenCredential, user identifiers, token refresh, or shared authentication across ACS services.
Install
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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-common-java -a cursor -y
Download .github/plugins/azure-sdk-java/skills/azure-communication-common-java/SKILL.md from the publisher, or copy the path and open the repository. PlugMCP lists the skill and does not host the file.
Where does azure-communication-common-java live?
The publisher keeps it at https://github.com/microsoft/skills.
Which agents can use azure-communication-common-java?
Claude, Cursor, and Codex can read a SKILL.md you add from the publisher's repository.
Azure Communication Services common utilities for Java. Use when working with CommunicationTokenCredential, user identifiers, token refresh, or shared authentication across ACS services.
name: azure-communication-common-java
description: Azure Communication Services common utilities for Java. Use when working with CommunicationTokenCredential, user identifiers, token refresh, or shared authentication across ACS services.
license: MIT
metadata:
author: Microsoft
version: "1.0.0"
package: com.azure:azure-communication-common
Azure Communication Common (Java)
Shared authentication utilities and data structures for Azure Communication Services.
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);
}
}
// 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);
Download .github/plugins/azure-sdk-java/skills/azure-communication-common-java/SKILL.md from the publisher, or copy the path and open the repository. PlugMCP lists the skill and does not host the file.
Where does azure-communication-common-java live?
The publisher keeps it at https://github.com/microsoft/skills.
Which agents can use azure-communication-common-java?
Claude, Cursor, and Codex can read a SKILL.md you add from the publisher's repository.