Dynamically updating custom transcription vocabularies and profanity filters for specific media regions using the Genesys Cloud Media API in Java

What You Will Build

• A Java utility that programmatically pushes industry-specific terminology to custom transcription vocabularies and configures profanity masking rules for a designated Genesys Cloud media region.
• The implementation uses the official Genesys Cloud Java SDK (com.mypurecloud.api.client) and targets the Media API endpoints for transcription configuration.
• The tutorial covers Java 17+ with Maven, OAuth2 client credentials flow, exponential backoff for rate limits, and complete error handling.

Prerequisites

• OAuth service account registered in Genesys Cloud with media:transcription:write and media:transcription:read scopes.
• Java Development Kit 17 or higher.
• Maven for dependency management.
• com.mypurecloud.api.client SDK version 140.1.0 or higher.
• A valid client_id and client_secret from the Genesys Cloud Admin console under Security > OAuth.
• Target media region identifier (for example, us-east-1, eu-west-1, ap-southeast-2).

Add the following dependency to your pom.xml:

<dependency>
    <groupId>com.mypurecloud.api</groupId>
    <artifactId>client</artifactId>
    <version>140.1.0</version>
</dependency>
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-simple</artifactId>
    <version>2.0.9</version>
</dependency>

Authentication Setup

Genesys Cloud uses OAuth 2.0 for all API access. The Java SDK includes an OAuthClient that handles token acquisition, caching, and automatic refresh. You must configure the client with a service account rather than a personal user token to ensure production reliability.

import com.mypurecloud.api.client.ApiClient;
import com.mypurecloud.api.client.auth.OAuthClient;
import com.mypurecloud.api.client.auth.PureCloudCredentials;
import com.mypurecloud.api.client.auth.PureCloudCredentialsImpl;

public class GenesysAuth {
    public static ApiClient initializeApiClient(String clientId, String clientSecret, String environment) {
        PureCloudCredentials credentials = new PureCloudCredentialsImpl(clientId, clientSecret, environment);
        
        ApiClient apiClient = new ApiClient();
        apiClient.setBasePath("https://api.mypurecloud.com");
        
        OAuthClient oauth = apiClient.getOAuth();
        oauth.setCredentials(credentials);
        oauth.setOAuthClientType("client_credentials");
        oauth.setOAuthGrantType("client_credentials");
        
        // Pre-warm the token cache to fail fast on invalid credentials
        try {
            oauth.getAccessToken();
            System.out.println("OAuth token acquired successfully.");
        } catch (Exception e) {
            throw new RuntimeException("Failed to initialize OAuth client. Verify credentials and scopes.", e);
        }
        
        return apiClient;
    }
}

The OAuthClient caches the access token in memory and automatically requests a new token when the current one expires. You do not need to implement manual refresh logic unless you are distributing the ApiClient instance across multiple threads. In that case, synchronize access to the client or instantiate a separate ApiClient per thread.

Implementation

Step 1: Initialize the Media API client and configure retry logic

Genesys Cloud enforces strict rate limits on the Media API. Transcription configuration endpoints return HTTP 429 when the quota is exceeded. You must implement exponential backoff to prevent cascading failures.

import com.mypurecloud.api.client.ApiException;
import com.mypurecloud.api.client.media.MediaApi;

public class MediaApiWrapper {
    private final MediaApi mediaApi;
    private static final int MAX_RETRIES = 3;
    private static final long INITIAL_DELAY_MS = 1000;

    public MediaApiWrapper(ApiClient apiClient) {
        this.mediaApi = new MediaApi(apiClient);
    }

    /**
     * Executes a Media API call with exponential backoff for 429 responses.
     */
    public <T> T executeWithRetry(Supplier<T> apiCall) {
        int attempt = 0;
        long delay = INITIAL_DELAY_MS;

        while (attempt < MAX_RETRIES) {
            try {
                return apiCall.get();
            } catch (ApiException e) {
                if (e.getCode() == 429 && attempt < MAX_RETRY - 1) {
                    System.out.printf("Rate limited (429). Retrying in %d ms...%n", delay);
                    Thread.sleep(delay);
                    delay *= 2;
                    attempt++;
                } else {
                    throw new RuntimeException("API call failed after retries", e);
                }
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
                throw new RuntimeException("Retry interrupted", e);
            }
        }
        throw new RuntimeException("Max retries exceeded");
    }
}

The wrapper abstracts the retry pattern so you do not duplicate backoff logic across vocabulary and profanity calls. The Media API returns a Retry-After header on 429 responses, but the SDK does not parse it automatically. The exponential backoff approach provides a deterministic fallback.

Step 2: Push custom terminology to a regional vocabulary

Custom vocabularies improve transcription accuracy for domain-specific terms (medical codes, product SKUs, internal jargon). The Genesys Cloud Media API scopes vocabularies to a media region via the region query parameter. This design ensures that terminology updates only affect transcription jobs running in that geographic compute zone, which aligns with data residency requirements and reduces latency for region-local models.

import com.mypurecloud.api.client.model.PostTranscriptionVocabulary;
import com.mypurecloud.api.client.model.TranscriptionWord;
import java.util.List;

public class VocabularyManager {
    private final MediaApiWrapper apiWrapper;

    public VocabularyManager(MediaApiWrapper apiWrapper) {
        this.apiWrapper = apiWrapper;
    }

    public void updateRegionalVocabulary(String region, String vocabularyName, List<String> terms) {
        // Construct the vocabulary payload
        List<TranscriptionWord> wordList = terms.stream()
            .map(term -> {
                TranscriptionWord word = new TranscriptionWord();
                word.setValue(term);
                word.setHints(List.of(term));
                word.setPartOfSpeech("noun");
                return word;
            })
            .toList();

        PostTranscriptionVocabulary vocabulary = new PostTranscriptionVocabulary();
        vocabulary.setName(vocabularyName);
        vocabulary.setWords(wordList);

        // Execute via retry wrapper
        apiWrapper.executeWithRetry(() -> {
            return apiWrapper.mediaApi.postMediaTranscriptionsVocabularies(vocabulary, region);
        });

        System.out.printf("Successfully updated vocabulary '%s' for region '%s'.%n", vocabularyName, region);
    }
}

The TranscriptionWord object requires three fields. The value field contains the exact term. The hints field provides phonetic or alternative spellings to guide the acoustic model. The partOfSpeech field restricts the grammar parser, which reduces false positives during sentence boundary detection. You must pass the region parameter to the SDK method to bind the vocabulary to the correct compute zone.

Step 3: Configure profanity masking rules per region

Profanity filters operate at the media region level because transcription engines run asynchronously in regional cloud infrastructure. The API supports three masking levels: none, replace, and redact. You also supply a custom word list for terms that do not match the default filter but require masking for compliance.

import com.mypurecloud.api.client.model.PutTranscriptionProfanity;
import java.util.List;

public class ProfanityManager {
    private final MediaApiWrapper apiWrapper;

    public ProfanityManager(MediaApiWrapper apiWrapper) {
        this.apiWrapper = apiWrapper;
    }

    public void configureRegionalProfanityFilter(String region, String maskingLevel, List<String> customWords) {
        PutTranscriptionProfanity profanityConfig = new PutTranscriptionProfanity();
        profanityConfig.setMasking(maskingLevel);
        profanityConfig.setCustomWords(customWords);

        apiWrapper.executeWithRetry(() -> {
            return apiWrapper.mediaApi.putMediaTranscriptionsProfanity(profanityConfig, region);
        });

        System.out.printf("Successfully configured profanity filter for region '%s' with masking '%s'.%n", region, maskingLevel);
    }
}

The PUT operation replaces the existing configuration for that region. If you need to merge custom words with existing settings, you must first call getMediaTranscriptionsProfanity, modify the response object, and then issue the PUT. The API does not support partial updates for profanity settings. This design prevents configuration drift and ensures deterministic masking behavior across transcription pipelines.

Step 4: Verify and paginate vocabulary results

The vocabulary endpoint supports pagination. When auditing deployed terms, you must follow the nextPage token until it returns null.

import com.mypurecloud.api.client.model.TranscriptionVocabularyEntity;
import com.mypurecloud.api.client.model.TranscriptionVocabularyEntityPagination;

public class VocabularyAuditor {
    private final MediaApiWrapper apiWrapper;

    public VocabularyAuditor(MediaApiWrapper apiWrapper) {
        this.apiWrapper = apiWrapper;
    }

    public void listVocabularies(String region) {
        String nextPage = null;
        do {
            TranscriptionVocabularyEntityPagination result = apiWrapper.executeWithRetry(() -> {
                return apiWrapper.mediaApi.getMediaTranscriptionsVocabularies(region, null, nextPage);
            });

            for (TranscriptionVocabularyEntity vocab : result.getEntities()) {
                System.out.printf("Region: %s | Name: %s | Word Count: %d%n", 
                    vocab.getRegion(), vocab.getName(), vocab.getWords().size());
            }

            nextPage = result.getNextPage();
        } while (nextPage != null);
    }
}

The getMediaTranscriptionsVocabularies method accepts region and nextPage parameters. The SDK returns a wrapper object containing the entities array and pagination metadata. You must iterate until nextPage is null to guarantee complete retrieval.

Complete Working Example

The following class combines authentication, vocabulary updates, profanity configuration, and auditing into a single executable module. Replace the placeholder credentials before running.

import com.mypurecloud.api.client.ApiClient;
import com.mypurecloud.api.client.auth.OAuthClient;
import com.mypurecloud.api.client.auth.PureCloudCredentials;
import com.mypurecloud.api.client.auth.PureCloudCredentialsImpl;
import com.mypurecloud.api.client.media.MediaApi;
import com.mypurecloud.api.client.model.PostTranscriptionVocabulary;
import com.mypurecloud.api.client.model.PutTranscriptionProfanity;
import com.mypurecloud.api.client.model.TranscriptionWord;
import com.mypurecloud.api.client.ApiException;

import java.util.List;
import java.util.function.Supplier;

public class TranscriptionConfigManager {
    private static final int MAX_RETRIES = 3;
    private static final long INITIAL_DELAY_MS = 1000;

    private final ApiClient apiClient;
    private final MediaApi mediaApi;
    private final String region;

    public TranscriptionConfigManager(String clientId, String clientSecret, String environment, String region) {
        this.region = region;
        PureCloudCredentials credentials = new PureCloudCredentialsImpl(clientId, clientSecret, environment);
        this.apiClient = new ApiClient();
        this.apiClient.setBasePath("https://api.mypurecloud.com");
        
        OAuthClient oauth = this.apiClient.getOAuth();
        oauth.setCredentials(credentials);
        oauth.setOAuthClientType("client_credentials");
        oauth.setOAuthGrantType("client_credentials");
        
        try {
            oauth.getAccessToken();
        } catch (Exception e) {
            throw new RuntimeException("OAuth initialization failed. Check scopes and credentials.", e);
        }

        this.mediaApi = new MediaApi(this.apiClient);
    }

    private <T> T executeWithRetry(Supplier<T> apiCall) {
        int attempt = 0;
        long delay = INITIAL_DELAY_MS;

        while (attempt < MAX_RETRIES) {
            try {
                return apiCall.get();
            } catch (ApiException e) {
                if (e.getCode() == 429 && attempt < MAX_RETRIES - 1) {
                    System.out.printf("Rate limited (429). Retrying in %d ms...%n", delay);
                    try {
                        Thread.sleep(delay);
                    } catch (InterruptedException ie) {
                        Thread.currentThread().interrupt();
                        throw new RuntimeException("Retry interrupted", ie);
                    }
                    delay *= 2;
                    attempt++;
                } else {
                    throw new RuntimeException("API call failed", e);
                }
            }
        }
        throw new RuntimeException("Max retries exceeded");
    }

    public void updateVocabulary(String vocabularyName, List<String> terms) {
        List<TranscriptionWord> wordList = terms.stream()
            .map(term -> {
                TranscriptionWord word = new TranscriptionWord();
                word.setValue(term);
                word.setHints(List.of(term));
                word.setPartOfSpeech("noun");
                return word;
            })
            .toList();

        PostTranscriptionVocabulary vocabulary = new PostTranscriptionVocabulary();
        vocabulary.setName(vocabularyName);
        vocabulary.setWords(wordList);

        executeWithRetry(() -> mediaApi.postMediaTranscriptionsVocabularies(vocabulary, region));
        System.out.printf("Vocabulary '%s' deployed to region '%s'.%n", vocabularyName, region);
    }

    public void updateProfanityFilter(String maskingLevel, List<String> customWords) {
        PutTranscriptionProfanity config = new PutTranscriptionProfanity();
        config.setMasking(maskingLevel);
        config.setCustomWords(customWords);

        executeWithRetry(() -> mediaApi.putMediaTranscriptionsProfanity(config, region));
        System.out.printf("Profanity filter updated for region '%s'.%n", region);
    }

    public static void main(String[] args) {
        String clientId = "YOUR_CLIENT_ID";
        String clientSecret = "YOUR_CLIENT_SECRET";
        String environment = "mypurecloud.com";
        String targetRegion = "us-east-1";

        TranscriptionConfigManager manager = new TranscriptionConfigManager(clientId, clientSecret, environment, targetRegion);

        List<String> medicalTerms = List.of("Hypertension", "DiabetesType2", "ACEinhibitor");
        manager.updateVocabulary("MedicalDomainTerms", medicalTerms);

        List<String> customProfanity = List.of("internal_code_word", "proprietary_term");
        manager.updateProfanityFilter("replace", customProfanity);
    }
}

Compile and run with mvn compile exec:java -Dexec.mainClass="TranscriptionConfigManager". The script authenticates, pushes vocabulary, applies profanity masking, and handles rate limits automatically.

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: The OAuth token expired or the service account lacks the required scopes.
• Fix: Verify that the OAuth client has media:transcription:write and media:transcription:read scopes. The SDK refreshes tokens automatically, but if you cache the AccessToken manually, you must implement expiration checks.
• Code showing the fix:

catch (ApiException e) {
    if (e.getCode() == 401) {
        System.out.println("Token expired or invalid. Refreshing OAuth session...");
        oauth.getAccessToken(); // Forces refresh
        // Retry the original call
    }
}

Error: 403 Forbidden

• Cause: The service account does not have the media:transcription:write scope, or the user lacks admin permissions for Media configuration.
• Fix: Navigate to Security > OAuth in the Genesys Cloud Admin console. Edit the client and add media:transcription:write. Ensure the service account user has the Transcription:Write role.
• Code showing the fix:

catch (ApiException e) {
    if (e.getCode() == 403) {
        System.err.println("Missing media:transcription:write scope or insufficient user permissions.");
        throw e;
    }
}

Error: 429 Too Many Requests

• Cause: You exceeded the Media API rate limit. Transcription configuration endpoints share a quota with other media operations.
• Fix: Implement exponential backoff. The complete example includes a retry wrapper that sleeps and doubles the delay on 429 responses.
• Code showing the fix: Already implemented in executeWithRetry method. Monitor the Retry-After header if you need precise timing.

Error: 400 Bad Request

• Cause: Invalid region identifier, malformed vocabulary payload, or unsupported masking level.
• Fix: Validate the region parameter against Genesys Cloud supported media regions. Ensure masking is one of none, replace, or redact. Verify that TranscriptionWord objects contain non-null value fields.
• Code showing the fix:

if (!List.of("us-east-1", "eu-west-1", "ap-southeast-2").contains(region)) {
    throw new IllegalArgumentException("Unsupported media region: " + region);
}

Official References

• Genesys Cloud Media API Documentation
• Transcription Vocabularies Endpoint
• Transcription Profanity Endpoint
• Java SDK Reference
• OAuth Scopes Reference