Scrubbing Genesys Cloud Outbound Contact Lists via REST API with Java

What You Will Build

A Java service that triggers, validates, and monitors outbound contact list sweeps against DNC registries and global suppression lists. The code uses the Genesys Cloud Outbound SDK to construct sweep payloads with list ID references, suppression rule matrices, and phone number normalization directives, validates record limits before execution, tracks sweep latency and match accuracy, synchronizes completion events to external compliance databases, and generates regulatory audit logs.

Prerequisites

• OAuth service account with scopes: outbound:contactlist:write, outbound:contactlist:read, outbound:contact:read, outbound:contact:write
• Genesys Cloud Java SDK (genesyscloud-sdk-java version 2.18.0 or higher)
• Java 17 runtime
• Maven or Gradle build tool
• Access to an active Outbound Contact List in Genesys Cloud

Authentication Setup

The Genesys Cloud Java SDK handles OAuth 2.0 client credentials flow automatically when configured. You must register a service account in Genesys Cloud, generate a client ID and secret, and assign the required outbound scopes. The SDK caches tokens and refreshes them transparently before expiration.

import com.mypurecloud.api.client.ApiClient;
import com.mypurecloud.api.client.Configuration;
import com.mypurecloud.api.auth.OAuthClientCredentialsProvider;

public class GenesysAuthSetup {
    public static ApiClient initializeSdk(String clientId, String clientSecret, String baseUrl) {
        OAuthClientCredentialsProvider oauthProvider = new OAuthClientCredentialsProvider(clientId, clientSecret);
        oauthProvider.addScope("outbound:contactlist:write");
        oauthProvider.addScope("outbound:contactlist:read");
        oauthProvider.addScope("outbound:contact:read");
        oauthProvider.addScope("outbound:contact:write");

        ApiClient client = ApiClient.defaultClient();
        client.setBasePath(baseUrl); // e.g., "https://api.mypurecloud.com"
        Configuration.defaultClient().setApiClient(client);
        Configuration.defaultClient().setAuthProvider(oauthProvider);
        
        return client;
    }
}

Implementation

Step 1: Constructing the Sweep Payload with Suppression Rules and DNC Directives

The sweep API accepts a SweepRequest object. You must define sweepType (GLOBAL, CAMPAIGN, or CUSTOM), attach suppression filters, and specify phone number normalization. Genesys Cloud validates the payload against telephony gateway constraints before execution. Invalid formats trigger a 400 response immediately.

The phoneNumberFormat field normalizes contacts to E164 or NATIONAL standards. E164 is required for international compliance and carrier routing. The filters array defines suppression rules. You can reference global suppression lists or campaign-specific DNC rules.

import com.mypurecloud.api.model.SweepRequest;
import com.mypurecloud.api.model.ContactFilter;
import com.mypurecloud.api.model.FilterType;
import com.mypurecloud.api.model.SweepType;
import java.util.List;

public class SweepPayloadBuilder {
    public static SweepRequest buildSweepRequest(String globalListId, String campaignId) {
        ContactFilter globalSuppressionFilter = new ContactFilter()
            .filterType(FilterType.GLOBAL)
            .filterId(globalListId)
            .matchType("EXACT");

        ContactFilter campaignDncFilter = new ContactFilter()
            .filterType(FilterType.CAMPAIGN)
            .filterId(campaignId)
            .matchType("EXACT");

        return new SweepRequest()
            .sweepType(SweepType.GLOBAL)
            .phoneNumberFormat("E164")
            .filters(List.of(globalSuppressionFilter, campaignDncFilter))
            .contactFilters(List.of()); // Additional custom filters can be appended here
    }
}

Required OAuth Scope: outbound:contactlist:write

HTTP Equivalent:

POST /api/v2/outbound/contactlists/{contactListId}/sweep
Authorization: Bearer <token>
Content-Type: application/json

{
  "sweepType": "GLOBAL",
  "phoneNumberFormat": "E164",
  "filters": [
    { "filterType": "GLOBAL", "filterId": "global-list-uuid", "matchType": "EXACT" },
    { "filterType": "CAMPAIGN", "filterId": "campaign-uuid", "matchType": "EXACT" }
  ],
  "contactFilters": []
}

Step 2: Validating Schemas Against Telephony Constraints and Record Limits

Before triggering the sweep, you must validate the contact list size and phone number formats. Genesys Cloud enforces a maximum record limit per sweep job. Exceeding this limit causes a 400 Bad Request. You must also verify that phone numbers match E164 or NATIONAL patterns to prevent carrier rejection.

import java.util.regex.Pattern;
import java.util.regex.Matcher;
import com.mypurecloud.api.api.ContactListsApi;
import com.mypurecloud.api.model.ContactList;

public class SweepValidator {
    private static final Pattern E164_PATTERN = Pattern.compile("^\\+?[1-9]\\d{1,14}$");
    private static final int MAX_CONTACTS_PER_SWEEP = 500000;

    public static void validateContactList(String contactListId) throws Exception {
        ContactListsApi listsApi = new ContactListsApi();
        ContactList list = listsApi.getContactList(contactListId, null, null);

        if (list.getContactCount() > MAX_CONTACTS_PER_SWEEP) {
            throw new IllegalArgumentException(
                String.format("Contact list exceeds maximum sweep limit. Current: %d, Max: %d",
                    list.getContactCount(), MAX_CONTACTS_PER_SWEEP));
        }

        // Sample validation: fetch first page to verify format compliance
        var contactsResponse = listsApi.getContactListContacts(contactListId, 1, 100, null, null);
        for (var contact : contactsResponse.getEntities()) {
            String phone = contact.getPhone();
            if (phone != null && !E164_PATTERN.matcher(phone).matches()) {
                throw new IllegalArgumentException(
                    String.format("Invalid phone format detected: %s. Expected E164.", phone));
            }
        }
    }
}

Required OAuth Scope: outbound:contactlist:read

Step 3: Triggering Atomic Sweep Operations and Polling for Completion

The sweep API is asynchronous. It returns a SweepResponse containing a sweepId. You must poll the status endpoint until completion. During polling, track latency, calculate match accuracy, and trigger external compliance synchronization.

import com.mypurecloud.api.api.ContactListsApi;
import com.mypurecloud.api.model.SweepResponse;
import com.mypurecloud.api.model.SweepStatus;
import java.time.Instant;
import java.util.concurrent.TimeUnit;

public class SweepExecutor {
    public static SweepResponse executeAndPoll(String contactListId, SweepRequest payload, ComplianceCallback callback) throws Exception {
        ContactListsApi api = new ContactListsApi();
        Instant start = Instant.now();
        
        SweepResponse initial = api.sweepContactList(contactListId, payload);
        String sweepId = initial.getSweepId();
        System.out.println("Sweep initiated. ID: " + sweepId);

        int maxAttempts = 60;
        int attempts = 0;
        SweepResponse finalStatus = initial;

        while (attempts < maxAttempts) {
            TimeUnit.SECONDS.sleep(5);
            attempts++;
            finalStatus = api.getSweep(contactListId, sweepId);

            if (finalStatus.getStatus() == SweepStatus.COMPLETED || 
                finalStatus.getStatus() == SweepStatus.FAILED) {
                break;
            }
        }

        Instant end = Instant.now();
        long latencyMs = java.time.Duration.between(start, end).toMillis();
        
        // Calculate match accuracy
        long totalContacts = finalStatus.getContactCount() != null ? finalStatus.getContactCount() : 0;
        long filteredContacts = finalStatus.getFilteredCount() != null ? finalStatus.getFilteredCount() : 0;
        double accuracyRate = totalContacts > 0 ? (double) filteredContacts / totalContacts : 0.0;

        callback.onSweepComplete(sweepId, finalStatus.getStatus(), latencyMs, accuracyRate);
        return finalStatus;
    }
}

Required OAuth Scope: outbound:contactlist:write

HTTP Polling Cycle:

GET /api/v2/outbound/contactlists/{contactListId}/sweep/{sweepId}
Authorization: Bearer <token>

Response:
{
  "sweepId": "sweep-uuid",
  "status": "COMPLETED",
  "contactCount": 12500,
  "filteredCount": 340,
  "phoneNumberFormat": "E164",
  "sweepType": "GLOBAL",
  "completedAt": "2023-10-25T14:30:00Z"
}

Step 4: External Compliance Synchronization and Audit Logging

Regulatory frameworks require immutable audit trails. You must log sweep initiation, completion, filtered counts, and latency. The callback interface handles external database synchronization and generates structured audit entries.

import java.time.OffsetDateTime;
import java.util.logging.Logger;
import java.util.logging.Level;

public interface ComplianceCallback {
    void onSweepComplete(String sweepId, String status, long latencyMs, double matchAccuracy);
}

public class RegulatoryAuditLogger implements ComplianceCallback {
    private static final Logger logger = Logger.getLogger(RegulatoryAuditLogger.class.getName());

    @Override
    public void onSweepComplete(String sweepId, String status, long latencyMs, double matchAccuracy) {
        String auditEntry = String.format(
            "SWEEP_AUDIT|id=%s|status=%s|latency_ms=%d|accuracy=%.4f|timestamp=%s|compliance_status=%s",
            sweepId,
            status,
            latencyMs,
            matchAccuracy,
            OffsetDateTime.now().toString(),
            status.equals("COMPLETED") ? "PASS" : "REVIEW_REQUIRED"
        );

        logger.info(auditEntry);
        
        // Simulate external compliance database sync
        try {
            syncToExternalComplianceDb(sweepId, status, latencyMs, matchAccuracy);
        } catch (Exception e) {
            logger.log(Level.SEVERE, "External compliance sync failed for sweep " + sweepId, e);
            throw new RuntimeException("Compliance synchronization failed", e);
        }
    }

    private void syncToExternalComplianceDb(String sweepId, String status, long latencyMs, double accuracy) throws Exception {
        // Replace with actual JDBC/REST call to your compliance system
        Thread.sleep(100); // Simulate network latency
        System.out.println("Synced sweep " + sweepId + " to external compliance database.");
    }
}

Complete Working Example

import com.mypurecloud.api.client.ApiClient;
import com.mypurecloud.api.client.Configuration;
import com.mypurecloud.api.auth.OAuthClientCredentialsProvider;
import com.mypurecloud.api.api.ContactListsApi;
import com.mypurecloud.api.model.SweepRequest;
import com.mypurecloud.api.model.ContactFilter;
import com.mypurecloud.api.model.FilterType;
import com.mypurecloud.api.model.SweepType;
import com.mypurecloud.api.model.SweepResponse;
import com.mypurecloud.api.model.SweepStatus;

import java.time.Instant;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.regex.Pattern;

public class OutboundContactScrubber {

    private static final Pattern E164_PATTERN = Pattern.compile("^\\+?[1-9]\\d{1,14}$");
    private static final int MAX_CONTACTS_PER_SWEEP = 500000;
    private static final int MAX_POLL_ATTEMPTS = 60;
    private static final int POLL_INTERVAL_SECONDS = 5;

    public static void main(String[] args) {
        String clientId = System.getenv("GENESYS_CLIENT_ID");
        String clientSecret = System.getenv("GENESYS_CLIENT_SECRET");
        String baseUrl = "https://api.mypurecloud.com";
        String contactListId = "your-contact-list-uuid";
        String globalSuppressionListId = "your-global-list-uuid";
        String campaignId = "your-campaign-uuid";

        try {
            // 1. Authentication
            ApiClient client = initializeSdk(clientId, clientSecret, baseUrl);
            System.out.println("Authenticated successfully.");

            // 2. Validation
            validateContactList(contactListId);
            System.out.println("Contact list validation passed.");

            // 3. Payload Construction
            SweepRequest sweepPayload = buildSweepRequest(globalSuppressionListId, campaignId);
            System.out.println("Sweep payload constructed.");

            // 4. Execution & Polling
            SweepResponse result = executeAndPoll(contactListId, sweepPayload, new RegulatoryAuditLogger());
            
            System.out.println("Sweep completed. Status: " + result.getStatus());
            System.out.println("Filtered contacts: " + result.getFilteredCount());
            
        } catch (Exception e) {
            System.err.println("Scrubbing pipeline failed: " + e.getMessage());
            e.printStackTrace();
            System.exit(1);
        }
    }

    private static ApiClient initializeSdk(String clientId, String clientSecret, String baseUrl) {
        OAuthClientCredentialsProvider oauthProvider = new OAuthClientCredentialsProvider(clientId, clientSecret);
        oauthProvider.addScope("outbound:contactlist:write");
        oauthProvider.addScope("outbound:contactlist:read");
        oauthProvider.addScope("outbound:contact:read");
        oauthProvider.addScope("outbound:contact:write");

        ApiClient client = ApiClient.defaultClient();
        client.setBasePath(baseUrl);
        Configuration.defaultClient().setApiClient(client);
        Configuration.defaultClient().setAuthProvider(oauthProvider);
        return client;
    }

    private static void validateContactList(String contactListId) throws Exception {
        ContactListsApi listsApi = new ContactListsApi();
        var listResponse = listsApi.getContactList(contactListId, null, null);

        if (listResponse.getContactCount() > MAX_CONTACTS_PER_SWEEP) {
            throw new IllegalArgumentException(
                String.format("Contact list exceeds maximum sweep limit. Current: %d, Max: %d",
                    listResponse.getContactCount(), MAX_CONTACTS_PER_SWEEP));
        }

        var contactsResponse = listsApi.getContactListContacts(contactListId, 1, 100, null, null);
        for (var contact : contactsResponse.getEntities()) {
            String phone = contact.getPhone();
            if (phone != null && !E164_PATTERN.matcher(phone).matches()) {
                throw new IllegalArgumentException(
                    String.format("Invalid phone format detected: %s. Expected E164.", phone));
            }
        }
    }

    private static SweepRequest buildSweepRequest(String globalListId, String campaignId) {
        ContactFilter globalFilter = new ContactFilter()
            .filterType(FilterType.GLOBAL)
            .filterId(globalListId)
            .matchType("EXACT");

        ContactFilter campaignFilter = new ContactFilter()
            .filterType(FilterType.CAMPAIGN)
            .filterId(campaignId)
            .matchType("EXACT");

        return new SweepRequest()
            .sweepType(SweepType.GLOBAL)
            .phoneNumberFormat("E164")
            .filters(List.of(globalFilter, campaignFilter))
            .contactFilters(List.of());
    }

    private static SweepResponse executeAndPoll(String contactListId, SweepRequest payload, RegulatoryAuditLogger callback) throws Exception {
        ContactListsApi api = new ContactListsApi();
        Instant start = Instant.now();

        SweepResponse initial = api.sweepContactList(contactListId, payload);
        String sweepId = initial.getSweepId();
        System.out.println("Sweep initiated. ID: " + sweepId);

        int attempts = 0;
        SweepResponse finalStatus = initial;

        while (attempts < MAX_POLL_ATTEMPTS) {
            TimeUnit.SECONDS.sleep(POLL_INTERVAL_SECONDS);
            attempts++;
            
            finalStatus = api.getSweep(contactListId, sweepId);
            if (finalStatus.getStatus() == SweepStatus.COMPLETED || 
                finalStatus.getStatus() == SweepStatus.FAILED) {
                break;
            }
        }

        Instant end = Instant.now();
        long latencyMs = java.time.Duration.between(start, end).toMillis();
        
        long totalContacts = finalStatus.getContactCount() != null ? finalStatus.getContactCount() : 0;
        long filteredContacts = finalStatus.getFilteredCount() != null ? finalStatus.getFilteredCount() : 0;
        double accuracyRate = totalContacts > 0 ? (double) filteredContacts / totalContacts : 0.0;

        callback.onSweepComplete(sweepId, finalStatus.getStatus().toString(), latencyMs, accuracyRate);
        return finalStatus;
    }

    public static class RegulatoryAuditLogger implements ComplianceCallback {
        @Override
        public void onSweepComplete(String sweepId, String status, long latencyMs, double matchAccuracy) {
            System.out.printf("AUDIT|sweep=%s|status=%s|latency=%dms|accuracy=%.4f|time=%s%n",
                sweepId, status, latencyMs, matchAccuracy, Instant.now());
            
            try {
                Thread.sleep(100); // Simulate external DB sync
                System.out.println("Compliance record synced for sweep: " + sweepId);
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
                throw new RuntimeException("Compliance sync interrupted", e);
            }
        }
    }

    public interface ComplianceCallback {
        void onSweepComplete(String sweepId, String status, long latencyMs, double matchAccuracy);
    }
}

Common Errors & Debugging

Error: 400 Bad Request - Invalid Sweep Configuration

Cause: The sweepType is missing, filters array is empty, or phoneNumberFormat is unsupported. Genesys Cloud rejects payloads that do not specify at least one valid suppression filter.
Fix: Verify that SweepRequest contains a non-empty filters list and a valid sweepType (GLOBAL, CAMPAIGN, or CUSTOM). Ensure phoneNumberFormat matches E164 or NATIONAL.
Code Fix:

if (payload.getFilters() == null || payload.getFilters().isEmpty()) {
    throw new IllegalArgumentException("Sweep request must contain at least one suppression filter.");
}

Error: 403 Forbidden - Insufficient OAuth Scopes

Cause: The service account lacks outbound:contactlist:write or outbound:contact:read.
Fix: Navigate to Genesys Cloud Admin > Security > OAuth Clients. Edit the client and add the missing scopes. Restart the application to force a token refresh.
Code Fix: Ensure oauthProvider.addScope("outbound:contactlist:write") is present in initialization.

Error: 429 Too Many Requests - Rate Limit Cascade

Cause: Exceeding the Genesys Cloud API rate limit (typically 100 requests per minute per scope tier). Sweeps trigger background jobs, but polling too aggressively triggers rate limits.
Fix: Implement exponential backoff during polling. Respect the Retry-After header.
Code Fix:

int retryDelay = 1000;
for (int i = 0; i < 3; i++) {
    try {
        return api.getSweep(contactListId, sweepId);
    } catch (com.mypurecloud.api.client.ApiException e) {
        if (e.getCode() == 429) {
            TimeUnit.MILLISECONDS.sleep(retryDelay);
            retryDelay *= 2;
        } else {
            throw e;
        }
    }
}

Error: 500 Internal Server Error - Telephony Gateway Constraint Violation

Cause: The contact list contains malformed phone numbers that fail E164 normalization at the carrier gateway level.
Fix: Run the validation step before triggering the sweep. Clean the source data or exclude invalid records.
Code Fix: The validateContactList method in Step 2 catches format violations before API submission.

Official References

• Outbound Contact List Sweep API Documentation
• Genesys Cloud Java SDK Reference
• Outbound DNC and Suppression Compliance Guide
• OAuth 2.0 Client Credentials Flow