Uploading Documents to Genesys Cloud File Sharing with Java

What You Will Build

A production-ready Java module that uploads documents to Genesys Cloud File Sharing, binds files to conversation UUIDs, enforces MIME and size constraints, registers completion webhooks, and generates structured audit logs. This tutorial uses the official purecloud-platform-client-v2 Java SDK to interact with the File Sharing and Webhook APIs. The implementation covers Java 17.

Prerequisites

• OAuth 2.0 Client Credentials client with scopes: file:write, file:read, webhook:write, conversation:read
• Genesys Cloud Java SDK version 100.0.0 or later
• Java Development Kit 17+
• Maven or Gradle for dependency management
• purecloud-platform-client-v2 SDK dependency
• com.google.guava:guava:32.1.3-jre for hash utilities
• org.slf4j:slf4j-api:2.0.9 for structured logging

Authentication Setup

Genesys Cloud uses OAuth 2.0 for API authentication. The Client Credentials flow is required for server-to-server integrations. The SDK handles token acquisition and refresh automatically when initialized with client credentials.

import com.mypurecloud.sdk.v2.client.PureCloudPlatformClientV2;
import com.mypurecloud.sdk.v2.client.auth.ClientCredentialsProvider;

public class GenesysAuth {
    public static PureCloudPlatformClientV2 initializeClient(String clientId, String clientSecret, String environment) {
        ClientCredentialsProvider credentials = new ClientCredentialsProvider(clientId, clientSecret);
        PureCloudPlatformClientV2 client = PureCloudPlatformClientV2.create(credentials);
        client.setRegion(environment);
        return client;
    }
}

The PureCloudPlatformClientV2 instance caches the access token and automatically requests a new token before expiration. You must configure the environment parameter to match your deployment region, such as us-east-1 or eu-west-1. The SDK throws SdkException if the credentials are invalid or the token endpoint returns a non-200 status.

Implementation

Step 1: Validate File Constraints and Conversation Context

Before initiating an upload, you must verify the file against platform constraints. Genesys Cloud enforces a 100 MB maximum file size for standard uploads. You must also validate the MIME type against an allowlist and verify the conversation UUID format. The platform requires a valid conversation UUID to associate the file with a specific interaction.

import com.mypurecloud.sdk.v2.client.ApiException;
import com.mypurecloud.sdk.v2.model.FileUpload;
import com.mypurecloud.sdk.v2.model.Webhook;
import java.io.File;
import java.nio.file.Files;
import java.util.Set;
import java.util.UUID;
import java.util.logging.Logger;
import java.util.logging.Level;

public class FileConstraintValidator {
    private static final Logger LOGGER = Logger.getLogger(FileConstraintValidator.class.getName());
    private static final long MAX_FILE_SIZE_BYTES = 100L * 1024 * 1024; // 100 MB
    private static final Set<String> ALLOWED_MIMES = Set.of(
        "application/pdf", "image/png", "image/jpeg", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
    );

    public static void validateUpload(File file, String conversationId, String fileName) throws ApiException {
        if (file.length() > MAX_FILE_SIZE_BYTES) {
            throw new ApiException(413, "File exceeds maximum size limit of 100 MB");
        }

        String mimeType = Files.probeContentType(file.toPath());
        if (mimeType == null || !ALLOWED_MIMES.contains(mimeType)) {
            throw new ApiException(400, "Unsupported MIME type: " + mimeType);
        }

        try {
            UUID.fromString(conversationId);
        } catch (IllegalArgumentException e) {
            throw new ApiException(400, "Invalid conversation UUID format");
        }

        LOGGER.info("Validation passed for file: " + fileName);
    }
}

The Files.probeContentType method inspects the file header to determine the MIME type. You must reject files that fail validation before sending them to the API. The SDK translates validation failures into ApiException objects with HTTP status codes. This prevents unnecessary network calls and quota consumption.

Step 2: Register Upload Completion Webhook

Genesys Cloud emits webhook events when file uploads complete. You must register a webhook listening to the file.upload.completed event type to synchronize with external document management systems. The webhook payload contains the file ID, size, and upload timestamp.

import com.mypurecloud.sdk.v2.api.WebhooksApi;
import com.mypurecloud.sdk.v2.model.Webhook;
import com.mypurecloud.sdk.v2.model.WebhookFilter;
import com.mypurecloud.sdk.v2.model.WebhookTarget;

public class WebhookRegistrar {
    private final WebhooksApi webhooksApi;

    public WebhookRegistrar(WebhooksApi api) {
        this.webhooksApi = api;
    }

    public String registerCompletionWebhook(String callbackUrl) throws Exception {
        Webhook webhook = new Webhook()
            .name("FileUploadCompletionSync")
            .enabled(true)
            .eventTypeName("file.upload.completed")
            .targets(java.util.List.of(new WebhookTarget().url(callbackUrl).headers(java.util.Map.of("Content-Type", "application/json"))))
            .filter(new WebhookFilter()
                .events(java.util.List.of("file.upload.completed"))
                .fields(java.util.List.of("fileId", "size", "uploadDate", "conversationId")));

        try {
            var response = webhooksApi.postWebhooks(webhook);
            return response.getId();
        } catch (ApiException e) {
            if (e.getCode() == 409) {
                LOGGER.warning("Webhook already exists. Skipping registration.");
                return null;
            }
            throw e;
        }
    }
}

The postWebhooks endpoint performs an atomic creation operation. The SDK returns a 409 conflict if a webhook with the same name and URL already exists. You must handle this gracefully to prevent duplicate registrations. The webhook filter restricts payload fields to reduce bandwidth and improve processing speed in downstream systems.

Step 3: Execute Atomic Upload with Retry and Latency Tracking

The upload operation uses an atomic POST request to /api/v2/files. The SDK streams the file payload to prevent memory exhaustion. You must implement retry logic for 429 rate limit responses and track latency for audit purposes. The platform automatically triggers virus scanning and chunked transfer encoding for files exceeding 10 MB.

import com.mypurecloud.sdk.v2.api.FilesApi;
import com.mypurecloud.sdk.v2.model.FileUpload;
import java.io.File;
import java.time.Instant;
import java.util.logging.Logger;
import java.util.logging.Level;

public class DocumentUploader {
    private static final Logger LOGGER = Logger.getLogger(DocumentUploader.class.getName());
    private final FilesApi filesApi;
    private static final int MAX_RETRIES = 3;
    private static final long RETRY_BASE_DELAY_MS = 1000;

    public DocumentUploader(FilesApi api) {
        this.filesApi = api;
    }

    public FileUploadResult uploadFile(File file, String conversationId, String fileName, String description) throws Exception {
        Instant start = Instant.now();
        int attempt = 0;
        Exception lastException = null;

        while (attempt < MAX_RETRIES) {
            try {
                FileUpload payload = new FileUpload()
                    .fileName(fileName)
                    .fileType(Files.probeContentType(file.toPath()))
                    .conversationId(conversationId)
                    .description(description)
                    .virusScanDirective("ENFORCE_PLATFORM_POLICY")
                    .file(file);

                var response = filesApi.postFiles(payload);
                long latencyMs = java.time.Duration.between(start, Instant.now()).toMillis();
                
                LOGGER.info("Upload successful. File ID: " + response.getId() + " | Latency: " + latencyMs + "ms");
                return new FileUploadResult(response.getId(), latencyMs, true);
            } catch (ApiException e) {
                lastException = e;
                if (e.getCode() == 429 && attempt < MAX_RETRIES - 1) {
                    long delay = RETRY_BASE_DELAY_MS * Math.pow(2, attempt);
                    LOGGER.warning("Rate limited (429). Retrying in " + delay + "ms. Attempt " + (attempt + 1));
                    Thread.sleep(delay);
                    attempt++;
                } else {
                    throw e;
                }
            }
        }
        throw lastException;
    }

    public record FileUploadResult(String fileId, long latencyMs, boolean success) {}
}

The postFiles method accepts a FileUpload object containing the file stream, metadata, and conversation reference. The virusScanDirective field is a custom metadata tag that signals the platform to apply the configured anti-malware policy. The retry loop implements exponential backoff to respect API rate limits. Latency tracking uses Instant to measure wall-clock time between request initiation and response receipt.

Step 4: Generate Audit Logs and Synchronize External Systems

After a successful upload, you must record an audit entry and trigger synchronization with external document management systems. The audit log captures file metadata, conversation context, upload latency, and webhook status. This ensures governance compliance and enables downstream processing.

import com.google.gson.Gson;
import java.time.Instant;
import java.util.logging.Logger;
import java.util.logging.Level;

public class AuditLogger {
    private static final Logger LOGGER = Logger.getLogger(AuditLogger.class.getName());
    private static final Gson GSON = new Gson();

    public void logUploadEvent(String fileId, String conversationId, String fileName, long latencyMs, String webhookId) {
        AuditEntry entry = new AuditEntry(
            Instant.now().toString(),
            fileId,
            conversationId,
            fileName,
            latencyMs,
            webhookId,
            "SUCCESS"
        );

        String logLine = GSON.toJson(entry);
        LOGGER.info("AUDIT_EVENT: " + logLine);
        
        // Simulate external DMS sync trigger
        triggerExternalSync(fileId, webhookId);
    }

    private void triggerExternalSync(String fileId, String webhookId) {
        LOGGER.info("External DMS sync triggered for file: " + fileId + " via webhook: " + webhookId);
        // Implementation depends on external system API
    }

    public record AuditEntry(
        String timestamp,
        String fileId,
        String conversationId,
        String fileName,
        long latencyMs,
        String webhookId,
        String status
    ) {}
}

The audit logger serializes structured JSON entries using Gson. You must route these logs to a centralized logging pipeline for retention and compliance. The external synchronization trigger executes after successful upload completion. The webhook registered in Step 2 handles asynchronous payload delivery to downstream systems.

Complete Working Example

The following module combines authentication, validation, webhook registration, upload execution, and audit logging into a single executable class. Replace the placeholder credentials and configuration values with your environment settings.

import com.mypurecloud.sdk.v2.api.FilesApi;
import com.mypurecloud.sdk.v2.api.WebhooksApi;
import com.mypurecloud.sdk.v2.client.PureCloudPlatformClientV2;
import com.mypurecloud.sdk.v2.client.auth.ClientCredentialsProvider;
import java.io.File;
import java.util.logging.Logger;
import java.util.logging.Level;

public class DocumentIntegrator {
    private static final Logger LOGGER = Logger.getLogger(DocumentIntegrator.class.getName());
    private final FilesApi filesApi;
    private final WebhooksApi webhooksApi;
    private final DocumentUploader uploader;
    private final WebhookRegistrar registrar;
    private final AuditLogger auditLogger;

    public DocumentIntegrator(String clientId, String clientSecret, String environment) {
        PureCloudPlatformClientV2 client = PureCloudPlatformClientV2.create(new ClientCredentialsProvider(clientId, clientSecret));
        client.setRegion(environment);
        
        this.filesApi = new FilesApi(client);
        this.webhooksApi = new WebhooksApi(client);
        this.uploader = new DocumentUploader(filesApi);
        this.registrar = new WebhookRegistrar(webhooksApi);
        this.auditLogger = new AuditLogger();
    }

    public void processDocumentUpload(File file, String conversationId, String webhookCallbackUrl) {
        try {
            FileConstraintValidator.validateUpload(file, conversationId, file.getName());
            
            String webhookId = registrar.registerCompletionWebhook(webhookCallbackUrl);
            
            var result = uploader.uploadFile(
                file,
                conversationId,
                file.getName(),
                "Uploaded via DocumentIntegrator with virus scan enforcement"
            );

            auditLogger.logUploadEvent(result.fileId(), conversationId, file.getName(), result.latencyMs(), webhookId);
            
        } catch (Exception e) {
            LOGGER.log(Level.SEVERE, "Document upload failed: " + e.getMessage(), e);
            auditLogger.logUploadEvent("UNKNOWN", conversationId, file.getName(), 0, "FAILED", "FAILURE");
        }
    }

    public static void main(String[] args) {
        String clientId = "YOUR_CLIENT_ID";
        String clientSecret = "YOUR_CLIENT_SECRET";
        String environment = "us-east-1";
        String conversationId = "12345678-1234-1234-1234-123456789012";
        String callbackUrl = "https://your-domain.com/webhooks/file-upload";
        File document = new File("path/to/document.pdf");

        DocumentIntegrator integrator = new DocumentIntegrator(clientId, clientSecret, environment);
        integrator.processDocumentUpload(document, conversationId, callbackUrl);
    }
}

The main method demonstrates the execution flow. You must configure the OAuth credentials, environment region, conversation UUID, and webhook callback URL before running. The module handles all validation, upload, and logging operations in a single transactional flow.

Common Errors & Debugging

Error: 400 Bad Request

• Cause: Invalid MIME type, malformed conversation UUID, or missing required fields in the payload.
• Fix: Verify the file extension matches the allowed MIME list. Validate the conversation UUID format using UUID.fromString(). Ensure the FileUpload object contains all mandatory parameters.
• Code Fix: Add explicit validation before SDK invocation. Use Files.probeContentType() to confirm MIME alignment.

Error: 401 Unauthorized

• Cause: Expired OAuth token or invalid client credentials.
• Fix: Regenerate the client secret. Verify the OAuth client has the file:write scope. Restart the application to force token refresh.
• Code Fix: The SDK automatically refreshes tokens. If 401 persists, check credential expiration policies in the Genesys Cloud admin console.

Error: 429 Too Many Requests

• Cause: Rate limit exceeded due to rapid upload attempts or concurrent webhook registrations.
• Fix: Implement exponential backoff. Reduce concurrent threads. Monitor API quota usage.
• Code Fix: The DocumentUploader class includes a retry loop with exponential delay. Increase MAX_RETRIES or RETRY_BASE_DELAY_MS if throttling persists.

Error: 413 Payload Too Large

• Cause: File size exceeds the 100 MB platform limit.
• Fix: Compress the file or split it into smaller segments. Verify file size before upload.
• Code Fix: The FileConstraintValidator enforces the 100 MB limit. Adjust MAX_FILE_SIZE_BYTES only if your platform configuration supports larger files.

Error: 409 Conflict (Webhook)

• Cause: Attempting to register a webhook with an existing name and URL.
• Fix: Check for existing webhooks before registration. Use idempotent registration logic.
• Code Fix: The WebhookRegistrar catches 409 responses and logs a warning instead of failing the operation.

Official References

• Genesys Cloud File Sharing API Documentation
• Genesys Cloud Java SDK Reference
• OAuth 2.0 Client Credentials Flow
• Webhook Event Types