Verify Genesys Cloud File Virus Scan Results and Automate Quarantine Actions with Java

What You Will Build

• A Java service that uploads a file, polls the File Sharing API for virus scan completion, validates scan results against security constraints, and automatically quarantines malicious files.
• Uses the Genesys Cloud Java SDK and REST endpoints for file sharing and virus scanning.
• Language: Java 17+ with Maven dependencies.

Prerequisites

• OAuth2 Client Credentials flow with scopes: file:read, file:write, file:admin
• Genesys Cloud Java SDK v180+ (com.mypurecloud.api.client)
• Java 17 runtime
• External dependencies: com.fasterxml.jackson.core:jackson-databind, org.slf4j:slf4j-api, org.apache.commons:commons-lang3

Authentication Setup

The Genesys Cloud Java SDK handles OAuth2 token acquisition, caching, and automatic refresh when configured with client credentials. You must register a custom OAuth app in the Genesys Cloud Admin console and grant the required scopes.

import com.mypurecloud.api.client.PureCloudPlatformClientV2;
import com.mypurecloud.api.client.auth.OAuth2ClientCredentials;

public class GenesysAuth {
    public static PureCloudPlatformClientV2 initializeClient(String clientId, String clientSecret, String environment) {
        PureCloudPlatformClientV2 client = PureCloudPlatformClientV2.create();
        client.setBaseUri("https://" + environment);
        OAuth2ClientCredentials credentials = new OAuth2ClientCredentials();
        credentials.setClientId(clientId);
        credentials.setClientSecret(clientSecret);
        credentials.setScopes(List.of("file:read", "file:write", "file:admin"));
        client.setOAuth2ClientCredentials(credentials);
        return client;
    }
}

The SDK caches the access token and refreshes it before expiration. If the token becomes invalid, the SDK throws a 401 Unauthorized exception. You must catch this at the service boundary and reinitialize credentials if rotation occurs.

Implementation

Step 1: Initialize Client and Configure Queue Limit Handling

Genesys Cloud enforces rate limits on file processing queues. When the queue reaches capacity, the API returns 429 Too Many Requests with a Retry-After header. You must implement exponential backoff with jitter that respects the server directive.

import com.mypurecloud.api.client.api.FileSharingApi;
import com.mypurecloud.api.client.ApiException;
import java.time.Instant;
import java.util.concurrent.ThreadLocalRandom;

public class QueueLimitHandler {
    private static final int MAX_RETRIES = 5;
    private static final long BASE_DELAY_MS = 1000;

    public static <T> T executeWithRetry(FileSharingApi api, java.util.function.Function<FileSharingApi, T> apiCall) {
        int attempt = 0;
        while (attempt < MAX_RETRIES) {
            try {
                return apiCall.apply(api);
            } catch (ApiException ex) {
                if (ex.getCode() == 429) {
                    long retryAfter = parseRetryAfter(ex.getHeaders());
                    long delay = Math.max(BASE_DELAY_MS * Math.pow(2, attempt), retryAfter);
                    long jitteredDelay = delay + ThreadLocalRandom.current().nextLong(0, delay / 2);
                    log.warn("Rate limited on attempt {}. Waiting {} ms", attempt, jitteredDelay);
                    sleepMs(jitteredDelay);
                    attempt++;
                } else {
                    throw ex;
                }
            }
        }
        throw new RuntimeException("Max retries exceeded for file processing queue");
    }

    private static long parseRetryAfter(java.util.Map<String, java.util.List<String>> headers) {
        return headers.getOrDefault("Retry-After", List.of("0")).stream()
                .map(Long::parseLong)
                .findFirst()
                .orElse(BASE_DELAY_MS * 1000);
    }

    private static void sleepMs(long ms) {
        try { Thread.sleep(ms); } catch (InterruptedException e) { Thread.currentThread().interrupt(); }
    }
}

Step 2: Upload File and Capture UUID Reference

You must upload the file to obtain a UUID reference. The File Sharing API accepts multipart uploads. The response contains the id field, which serves as the file UUID for all subsequent scan and quarantine operations.

import com.mypurecloud.api.client.model.FileUploadRequest;
import com.mypurecloud.api.client.model.FileUploadResponse;
import java.util.Base64;

public class FileUploader {
    public static String uploadFile(FileSharingApi api, String fileName, byte[] fileBytes) throws ApiException {
        FileUploadRequest request = new FileUploadRequest();
        request.setFileName(fileName);
        request.setFileSize((long) fileBytes.length);
        request.setFileType(guessMimeType(fileName));
        request.setFileData(Base64.getEncoder().encodeToString(fileBytes));
        
        FileUploadResponse response = api.createFile(request);
        log.info("File uploaded successfully. UUID: {}", response.getId());
        return response.getId();
    }

    private static String guessMimeType(String fileName) {
        String ext = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
        return switch (ext) {
            case "pdf" -> "application/pdf";
            case "docx" -> "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
            case "zip" -> "application/zip";
            default -> "application/octet-stream";
        };
    }
}

Step 3: Poll Scan Status and Validate Against Security Constraints

The virus scan runs asynchronously. You must poll GET /api/v2/filesharing/files/{fileId}/virusscan until the status transitions to completed or failed. You must validate the response schema against security engine constraints and track latency.

import com.mypurecloud.api.client.model.FileVirusScanResponse;
import java.time.Duration;
import java.time.Instant;
import java.util.Set;

public class ScanVerifier {
    private static final Set<String> VALID_STATUSES = Set.of("queued", "scanning", "completed", "failed");
    private static final int MAX_POLL_SECONDS = 300;
    private static final int POLL_INTERVAL_MS = 5000;

    public static FileVirusScanResponse verifyScan(FileSharingApi api, String fileId, ScanMetrics metrics) throws ApiException {
        Instant start = Instant.now();
        int elapsed = 0;

        while (elapsed < MAX_POLL_SECONDS) {
            FileVirusScanResponse scan = QueueLimitHandler.executeWithRetry(api, a -> a.getFileVirusScan(fileId));
            validateScanSchema(scan);

            if (scan.getStatus().equals("completed") || scan.getStatus().equals("failed")) {
                Instant end = Instant.now();
                metrics.recordLatency(Duration.between(start, end).toMillis());
                log.info("Scan completed for file {}. Status: {}", fileId, scan.getStatus());
                return scan;
            }

            Thread.sleep(POLL_INTERVAL_MS);
            elapsed += POLL_INTERVAL_MS / 1000;
        }
        throw new ApiException(408, "Scan verification timeout exceeded");
    }

    private static void validateScanSchema(FileVirusScanResponse scan) {
        if (scan.getId() == null || !VALID_STATUSES.contains(scan.getStatus())) {
            throw new IllegalArgumentException("Invalid scan response schema: missing id or unknown status");
        }
        if (scan.getEngine() == null || scan.getEngine().isEmpty()) {
            log.warn("Scan engine identifier missing. Proceeding with default validation pipeline.");
        }
    }
}

Step 4: Execute Quarantine Directive and Generate Audit Log

When the scan result indicates malware detection, you must trigger an automatic block via the quarantine endpoint. The API requires a FileQuarantineRequest with an explicit action directive. You must log the action for governance compliance.

import com.mypurecloud.api.client.model.FileQuarantineRequest;
import com.mypurecloud.api.client.model.FileQuarantineResponse;
import java.time.ZonedDateTime;
import java.util.Map;

public class QuarantineManager {
    public static FileQuarantineResponse quarantineFile(FileSharingApi api, String fileId, FileVirusScanResponse scan) throws ApiException {
        boolean isMalicious = scan.isMalwareDetected() || 
                              (scan.getThreats() != null && !scan.getThreats().isEmpty()) ||
                              "failed".equals(scan.getStatus());

        if (!isMalicious) {
            log.info("File {} cleared by signature database and heuristic analysis. No quarantine required.", fileId);
            return null;
        }

        FileQuarantineRequest request = new FileQuarantineRequest();
        request.setReason("Automated malware detection: " + (scan.getThreats() != null ? String.join(", ", scan.getThreats()) : "Heuristic flag"));
        request.setNotifyUploaders(true);

        FileQuarantineResponse response = QueueLimitHandler.executeWithRetry(api, a -> a.postFileQuarantine(fileId, request));
        
        logAuditEvent("QUARANTINE_TRIGGERED", Map.of(
            "fileId", fileId,
            "status", scan.getStatus(),
            "threats", scan.getThreats() != null ? scan.getThreats().toString() : "none",
            "engine", scan.getEngine(),
            "timestamp", ZonedDateTime.now().toString()
        ));

        return response;
    }

    private static void logAuditEvent(String action, Map<String, String> details) {
        // Structured audit logging implementation
        log.info("AUDIT|{}|{}", action, details);
    }
}

Step 5: Synchronize Webhook Events and Track Verification Metrics

Genesys Cloud emits file.virusscan.completed webhooks. You must align webhook payloads with your polling loop to prevent duplicate processing. You must also track threat detection success rates and verification latency for operational efficiency.

import com.fasterxml.jackson.databind.JsonNode;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;

public class ScanMetrics {
    private final AtomicLong totalLatencyMs = new AtomicLong(0);
    private final AtomicInteger totalScans = new AtomicInteger(0);
    private final AtomicInteger malwareDetected = new AtomicInteger(0);

    public void recordLatency(long latencyMs) {
        totalLatencyMs.addAndGet(latencyMs);
        totalScans.incrementAndGet();
    }

    public void recordThreatDetected() {
        malwareDetected.incrementAndGet();
    }

    public double getAverageLatencyMs() {
        int count = totalScans.get();
        return count == 0 ? 0.0 : (double) totalLatencyMs.get() / count;
    }

    public double getThreatDetectionRate() {
        int count = totalScans.get();
        return count == 0 ? 0.0 : (double) malwareDetected.get() / count;
    }
}

// Webhook payload structure for file.virusscan.completed
/*
{
  "id": "webhook-event-uuid",
  "type": "file.virusscan.completed",
  "timestamp": "2024-01-15T10:30:00Z",
  "data": {
    "fileId": "file-uuid-reference",
    "status": "completed",
    "malwareDetected": false,
    "engine": "symantec-enterprise",
    "threats": []
  }
}
*/

Complete Working Example

The following Java class integrates authentication, upload, verification, quarantine, and metrics tracking into a single executable service. Replace placeholder credentials and run the main method.

import com.mypurecloud.api.client.PureCloudPlatformClientV2;
import com.mypurecloud.api.client.api.FileSharingApi;
import com.mypurecloud.api.client.model.FileVirusScanResponse;
import com.mypurecloud.api.client.model.FileQuarantineResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.List;

public class GenesysFileScanVerifier {
    private static final Logger log = LoggerFactory.getLogger(GenesysFileScanVerifier.class);
    private static final ScanMetrics metrics = new ScanMetrics();

    public static void main(String[] args) {
        String clientId = System.getenv("GENESYS_CLIENT_ID");
        String clientSecret = System.getenv("GENESYS_CLIENT_SECRET");
        String environment = "mypurecloud.com";
        String testFileName = "document.pdf";
        byte[] testFileBytes = new byte[1024]; // Replace with actual file bytes

        PureCloudPlatformClientV2 client = GenesysAuth.initializeClient(clientId, clientSecret, environment);
        FileSharingApi fileApi = new FileSharingApi(client);

        try {
            String fileId = FileUploader.uploadFile(fileApi, testFileName, testFileBytes);
            FileVirusScanResponse scanResult = ScanVerifier.verifyScan(fileApi, fileId, metrics);
            
            if (scanResult.isMalwareDetected() || (scanResult.getThreats() != null && !scanResult.getThreats().isEmpty())) {
                metrics.recordThreatDetected();
                QuarantineManager.quarantineFile(fileApi, fileId, scanResult);
            }

            log.info("Verification pipeline complete. Avg Latency: {} ms. Threat Rate: {}%", 
                     metrics.getAverageLatencyMs(), 
                     String.format("%.2f", metrics.getThreatDetectionRate() * 100));
        } catch (Exception ex) {
            log.error("File verification pipeline failed", ex);
        } finally {
            client.close();
        }
    }
}

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: OAuth token expired, client credentials misconfigured, or missing file:read/file:write scopes.
• Fix: Verify the OAuth app permissions in the Genesys Admin console. Ensure the SDK is initialized with the correct environment endpoint. The SDK automatically refreshes tokens, but credential rotation requires reinitialization.
• Code Fix: Wrap API calls in a retry block that catches ApiException with code 401 and triggers credential revalidation.

Error: 403 Forbidden

• Cause: The OAuth app lacks file:admin scope, or the organization has restricted file sharing to specific user roles.
• Fix: Grant file:admin to the custom OAuth app. Verify that the service account associated with the credentials has File Sharing permissions enabled in the security profile.

Error: 429 Too Many Requests

• Cause: Maximum file processing queue limits reached. Genesys throttles concurrent scan requests to protect the security engine.
• Fix: Implement the QueueLimitHandler with exponential backoff. Parse the Retry-After header strictly. Do not poll faster than 5 seconds during peak queue saturation.
• Code Fix: Use Thread.sleep() with jitter as shown in Step 1. Monitor Retry-After values and adjust BASE_DELAY_MS accordingly.

Error: 500 Internal Server Error

• Cause: Transient security engine failure or malformed file payload during upload.
• Fix: Validate file size and MIME type before upload. Implement a circuit breaker that halts uploads after consecutive 5xx responses. Log the file UUID and retry after 30 seconds.

Official References

• Genesys Cloud File Sharing API Documentation
• Genesys Cloud Java SDK Reference
• OAuth2 Client Credentials Flow
• File Virus Scan Endpoint