azure-communication-sms-java

Author's original introduction

Send SMS messages with Azure Communication Services SMS Java SDK. Use when implementing SMS notifications, alerts, OTP delivery, bulk messaging, or delivery reports.

SkillPi interpretation

Tasks

azure-communication-sms-java

Audience

Use the scope in the original author introduction.

Inputs and outputs

See the complete source; users must confirm cloud data transfers.

Software, accounts and paid services

This azure-communication-sms-java package contains Microsoft Azure SDK documentation and examples, not a runtime-verified installer. Check SDK names/versions, tenant/subscription and actual endpoints; grant only task-specific least privilege. Never put administrator credentials or real secrets in samples, logs or commits. Connected cloud services may receive selected text, documents, audio, messages, logs or other input and incur charges; confirm scope, redaction and costs first. Ask the user to confirm each resource creation/update/deletion, key/access change or outbound message and test with disposable resources before production. Replace and verify placeholder endpoints and samples. SkillPi checked pinned source, complete attachments and static/antivirus evidence only; it did not run the SDK, verify service compatibility or authorize cloud access.

Limits and differences

Original author introduction preserved; Chinese is a corresponding translation. Examples were not run by SkillPi; versions, compatibility and outcomes are author claims.

Testing

Not tested

Security rating and access scope

caution · Static evidence review; not a runtime safety guarantee.

This azure-communication-sms-java package contains Microsoft Azure SDK documentation and examples, not a runtime-verified installer. Check SDK names/versions, tenant/subscription and actual endpoints; grant only task-specific least privilege. Never put administrator credentials or real secrets in samples, logs or commits. Connected cloud services may receive selected text, documents, audio, messages, logs or other input and incur charges; confirm scope, redaction and costs first. Ask the user to confirm each resource creation/update/deletion, key/access change or outbound message and test with disposable resources before production. Replace and verify placeholder endpoints and samples. SkillPi checked pinned source, complete attachments and static/antivirus evidence only; it did not run the SDK, verify service compatibility or authorize cloud access.

Before use, confirm and authorize actual file access, external services and network destinations in your host. This review grants no runtime permissions.

Original SKILL.md

---
name: azure-communication-sms-java
description: Send SMS messages with Azure Communication Services SMS Java SDK. Use when implementing SMS notifications, alerts, OTP delivery, bulk messaging, or delivery reports.
license: MIT
metadata:
  author: Microsoft
  version: "1.0.0"
  package: com.azure:azure-communication-sms
---

# Azure Communication SMS (Java)

Send SMS messages to single or multiple recipients with delivery reporting.

## Installation

```xml
<dependency>
    <groupId>com.azure</groupId>
    <artifactId>azure-communication-sms</artifactId>
    <version>1.2.0</version>
</dependency>
```

## Client Creation

```java
import com.azure.communication.sms.SmsClient;
import com.azure.communication.sms.SmsClientBuilder;
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 (recommended)
SmsClient smsClient = new SmsClientBuilder()
    .endpoint("https://<resource>.communication.azure.com")
    .credential(credential)
    .buildClient();

// With connection string
SmsClient smsClient = new SmsClientBuilder()
    .connectionString("<connection-string>")
    .buildClient();

// With AzureKeyCredential
import com.azure.core.credential.AzureKeyCredential;

SmsClient smsClient = new SmsClientBuilder()
    .endpoint("https://<resource>.communication.azure.com")
    .credential(new AzureKeyCredential("<access-key>"))
    .buildClient();

// Async client
SmsAsyncClient smsAsyncClient = new SmsClientBuilder()
    .connectionString("<connection-string>")
    .buildAsyncClient();
```

## Send SMS to Single Recipient

```java
import com.azure.communication.sms.models.SmsSendResult;

// Simple send
SmsSendResult result = smsClient.send(
    "+14255550100",      // From (your ACS phone number)
    "+14255551234",      // To
    "Your verification code is 123456");

System.out.println("Message ID: " + result.getMessageId());
System.out.println("To: " + result.getTo());
System.out.println("Success: " + result.isSuccessful());

if (!result.isSuccessful()) {
    System.out.println("Error: " + result.getErrorMessage());
    System.out.println("Status: " + result.getHttpStatusCode());
}
```

## Send SMS to Multiple Recipients

```java
import com.azure.communication.sms.models.SmsSendOptions;
import java.util.Arrays;
import java.util.List;

List<String> recipients = Arrays.asList(
    "+14255551111",
    "+14255552222",
    "+14255553333"
);

// With options
SmsSendOptions options = new SmsSendOptions()
    .setDeliveryReportEnabled(true)
    .setTag("marketing-campaign-001");

Iterable<SmsSendResult> results = smsClient.sendWithResponse(
    "+14255550100",      // From
    recipients,          // To list
    "Flash sale! 50% off today only.",
    options,
    Context.NONE
).getValue();

for (SmsSendResult result : results) {
    if (result.isSuccessful()) {
        System.out.println("Sent to " + result.getTo() + ": " + result.getMessageId());
    } else {
        System.out.println("Failed to " + result.getTo() + ": " + result.getErrorMessage());
    }
}
```

## Send Options

```java
SmsSendOptions options = new SmsSendOptions();

// Enable delivery reports (sent via Event Grid)
options.setDeliveryReportEnabled(true);

// Add custom tag for tracking
options.setTag("order-confirmation-12345");
```

## Response Handling

```java
import com.azure.core.http.rest.Response;

Response<Iterable<SmsSendResult>> response = smsClient.sendWithResponse(
    "+14255550100",
    Arrays.asList("+14255551234"),
    "Hello!",
    new SmsSendOptions().setDeliveryReportEnabled(true),
    Context.NONE
);

// Check HTTP response
System.out.println("Status code: " + response.getStatusCode());
System.out.println("Headers: " + response.getHeaders());

// Process results
for (SmsSendResult result : response.getValue()) {
    System.out.println("Message ID: " + result.getMessageId());
    System.out.println("Successful: " + result.isSuccessful());
    
    if (!result.isSuccessful()) {
        System.out.println("HTTP Status: " + result.getHttpStatusCode());
        System.out.println("Error: " + result.getErrorMessage());
    }
}
```

## Async Operations

```java
import reactor.core.publisher.Mono;

SmsAsyncClient asyncClient = new SmsClientBuilder()
    .connectionString("<connection-string>")
    .buildAsyncClient();

// Send single message
asyncClient.send("+14255550100", "+14255551234", "Async message!")
    .subscribe(
        result -> System.out.println("Sent: " + result.getMessageId()),
        error -> System.out.println("Error: " + error.getMessage())
    );

// Send to multiple with options
SmsSendOptions options = new SmsSendOptions()
    .setDeliveryReportEnabled(true);

asyncClient.sendWithResponse(
    "+14255550100",
    Arrays.asList("+14255551111", "+14255552222"),
    "Bulk async message",
    options)
    .subscribe(response -> {
        for (SmsSendResult result : response.getValue()) {
            System.out.println("Result: " + result.getTo() + " - " + result.isSuccessful());
        }
    });
```

## Error Handling

```java
import com.azure.core.exception.HttpResponseException;

try {
    SmsSendResult result = smsClient.send(
        "+14255550100",
        "+14255551234",
        "Test message"
    );
    
    // Individual message errors don't throw exceptions
    if (!result.isSuccessful()) {
        handleMessageError(result);
    }
    
} catch (HttpResponseException e) {
    // Request-level failures (auth, network, etc.)
    System.out.println("Request failed: " + e.getMessage());
    System.out.println("Status: " + e.getResponse().getStatusCode());
} catch (RuntimeException e) {
    System.out.println("Unexpected error: " + e.getMessage());
}

private void handleMessageError(SmsSendResult result) {
    int status = result.getHttpStatusCode();
    String error = result.getErrorMessage();
    
    if (status == 400) {
        System.out.println("Invalid phone number: " + result.getTo());
    } else if (status == 429) {
        System.out.println("Rate limited - retry later");
    } else {
        System.out.println("Error " + status + ": " + error);
    }
}
```

## Delivery Reports

Delivery reports are sent via Azure Event Grid. Configure an Event Grid subscription for your ACS resource.

```java
// Event Grid webhook handler (in your endpoint)
public void handleDeliveryReport(String eventJson) {
    // Parse Event Grid event
    // Event type: Microsoft.Communication.SMSDeliveryReportReceived
    
    // Event data contains:
    // - messageId: correlates to SmsSendResult.getMessageId()
    // - from: sender number
    // - to: recipient number
    // - deliveryStatus: "Delivered", "Failed", etc.
    // - deliveryStatusDetails: detailed status
    // - receivedTimestamp: when status was received
    // - tag: your custom tag from SmsSendOptions
}
```

## SmsSendResult Properties

| Property | Type | Description |
|----------|------|-------------|
| `getMessageId()` | String | Unique message identifier |
| `getTo()` | String | Recipient phone number |
| `isSuccessful()` | boolean | Whether send succeeded |
| `getHttpStatusCode()` | int | HTTP status for this recipient |
| `getErrorMessage()` | String | Error details if failed |
| `getRepeatabilityResult()` | RepeatabilityResult | Idempotency result |

## Environment Variables

```bash
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
SMS_FROM_NUMBER=+14255550100  # Required for the sender phone number
AZURE_TOKEN_CREDENTIALS=prod  # Required only if DefaultAzureCredential is used in production
```

## Best Practices

1. **Phone Number Format** - Use E.164 format: `+[country code][number]`
2. **Delivery Reports** - Enable for critical messages (OTP, alerts)
3. **Tagging** - Use tags to correlate messages with business context
4. **Error Handling** - Check `isSuccessful()` for each recipient individually
5. **Rate Limiting** - Implement retry with backoff for 429 responses
6. **Bulk Sending** - Use batch send for multiple recipients (more efficient)

## Trigger Phrases

- "send SMS Java", "text message Java"
- "SMS notification", "OTP SMS", "bulk SMS"
- "delivery report SMS", "Azure Communication Services SMS"

Copyright and license notice

    MIT License

    Copyright (c) Microsoft Corporation.

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all
    copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    SOFTWARE