Retrieving Genesys Cloud Voice Recording Metadata and Downloads with Java

What You Will Build

This tutorial builds a production-grade Java module that queries recording metadata, validates payload constraints, executes atomic HTTP GET operations for secure downloads, and implements retry logic, token expiration handling, latency tracking, and audit logging. The implementation uses the Genesys Cloud Voice Recording API endpoints and modern Java HttpClient for precise control over request lifecycles. The code is written in Java 17 and relies on standard JDK libraries plus Jackson for JSON parsing.

Prerequisites

• OAuth 2.0 Client Credentials flow configured in Genesys Cloud with recording:view and recording:download scopes
• Genesys Cloud Java SDK reference: com.mendix.genesys.cloud:genesyscloud-java-sdk (version 2023.10 or later)
• Java Development Kit 17 or higher
• Maven dependencies: com.fasterxml.jackson.core:jackson-databind, org.slf4j:slf4j-api, ch.qos.logback:logback-classic
• Network access to your Genesys Cloud environment domain (https://{your-domain}.mypurecloud.com)

Authentication Setup

Genesys Cloud uses OAuth 2.0 Bearer tokens for API authentication. The Client Credentials flow requires a client ID and client secret. You must cache the token and refresh it before expiration to prevent 401 Unauthorized responses during batch retrieval operations.

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

public class GenesysAuthManager {
    private final String baseUrl;
    private final String clientId;
    private final String clientSecret;
    private final HttpClient httpClient;
    private final ObjectMapper mapper;
    private volatile String accessToken;
    private volatile long tokenExpiryEpoch;

    public GenesysAuthManager(String baseUrl, String clientId, String clientSecret) {
        this.baseUrl = baseUrl.endsWith("/") ? baseUrl.substring(0, baseUrl.length() - 1) : baseUrl;
        this.clientId = clientId;
        this.clientSecret = clientSecret;
        this.httpClient = HttpClient.newBuilder().version(HttpClient.Version.HTTP_1_1).build();
        this.mapper = new ObjectMapper();
        this.tokenExpiryEpoch = 0;
    }

    public String getAccessToken() throws Exception {
        if (accessToken != null && System.currentTimeMillis() < tokenExpiryEpoch - 60_000) {
            return accessToken;
        }
        return refreshToken();
    }

    private String refreshToken() throws Exception {
        String tokenUrl = baseUrl + "/api/v2/oauth/token";
        String body = "grant_type=client_credentials&client_id=" + clientId + "&client_secret=" + clientSecret;
        
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(tokenUrl))
                .header("Content-Type", "application/x-www-form-urlencoded")
                .POST(HttpRequest.BodyPublishers.ofString(body))
                .build();

        HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
        if (response.statusCode() != 200) {
            throw new RuntimeException("Token refresh failed with status " + response.statusCode());
        }

        JsonNode json = mapper.readTree(response.body());
        this.accessToken = json.get("access_token").asText();
        this.tokenExpiryEpoch = System.currentTimeMillis() + (json.get("expires_in").asInt() * 1000);
        return this.accessToken;
    }
}

The token manager checks expiration with a sixty second safety buffer. This prevents mid-request authentication failures during bulk metadata retrieval. The volatile keyword ensures thread-safe visibility across concurrent download workers.

Implementation

Step 1: Query Recording Metadata with Constraint Validation

Genesys Cloud recording metadata endpoints enforce pagination limits and date range constraints. The /api/v2/recordings endpoint supports filtering by fromDate, toDate, pageSize, and pageNumber. You must validate the response schema against media-constraints (maximum payload size, supported formats) before initiating downloads.

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class RecordingMetadataRetriever {
    private static final Logger logger = LoggerFactory.getLogger(RecordingMetadataRetriever.class);
    private final String baseUrl;
    private final GenesysAuthManager authManager;
    private final HttpClient httpClient;
    private final ObjectMapper mapper;

    public RecordingMetadataRetriever(String baseUrl, GenesysAuthManager authManager) {
        this.baseUrl = baseUrl.endsWith("/") ? baseUrl.substring(0, baseUrl.length() - 1) : baseUrl;
        this.authManager = authManager;
        this.httpClient = HttpClient.newBuilder()
                .version(HttpClient.Version.HTTP_1_1)
                .followRedirects(HttpClient.Redirect.NEVER)
                .build();
        this.mapper = new ObjectMapper();
    }

    public JsonNode fetchMetadata(String fromDate, String toDate, int pageSize, int pageNumber) throws Exception {
        String endpoint = String.format("/api/v2/recordings?fromDate=%s&toDate=%s&pageSize=%d&pageNumber=%d",
                fromDate, toDate, pageSize, pageNumber);
        
        String token = authManager.getAccessToken();
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(baseUrl + endpoint))
                .header("Authorization", "Bearer " + token)
                .header("Accept", "application/json")
                .GET()
                .build();

        HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
        handleStandardErrors(response);

        JsonNode payload = mapper.readTree(response.body());
        validateMetadataConstraints(payload);
        return payload;
    }

    private void validateMetadataConstraints(JsonNode payload) throws Exception {
        if (!payload.has("entities") || payload.get("entities").isEmpty()) {
            logger.warn("Empty metadata payload received. No recordings match constraints.");
            return;
        }
        
        JsonNode entities = payload.get("entities");
        for (JsonNode recording : entities) {
            String format = recording.path("format").asText("unknown");
            long sizeBytes = recording.path("size").asLong(0);
            
            if (!format.matches("^(wav|mp3|ogg)$")) {
                throw new IllegalArgumentException("Unsupported recording format: " + format);
            }
            if (sizeBytes > 1_073_741_824L) {
                logger.warn("Recording {} exceeds maximum-metadata-size limit. Skipping download directive.", recording.get("id").asText());
            }
        }
    }

    private void handleStandardErrors(HttpResponse<String> response) throws Exception {
        if (response.statusCode() == 401) {
            logger.error("Expired token detected. Forcing refresh.");
            authManager.getAccessToken();
            throw new RuntimeException("Authentication failed after refresh attempt.");
        }
        if (response.statusCode() == 403) {
            throw new SecurityException("Access control verification failed. Missing recording:view scope.");
        }
        if (response.statusCode() == 429) {
            long retryAfter = Long.parseLong(response.headers().firstValue("Retry-After").orElse("60"));
            logger.warn("Rate limit exceeded. Pausing for {} seconds.", retryAfter);
            Thread.sleep(retryAfter * 1000);
        }
        if (response.statusCode() >= 500) {
            throw new RuntimeException("Genesys Cloud server error: " + response.statusCode());
        }
    }
}

The constraint validation step checks the format field against supported audio types and verifies that size remains within platform limits. Genesys Cloud enforces strict payload boundaries to prevent memory exhaustion during bulk operations. The handleStandardErrors method intercepts 401, 403, and 429 responses before they cascade into application crashes.

Step 2: Execute Atomic Download Directive with Format Verification

Downloading recordings requires an atomic HTTP GET operation against /api/v2/recordings/{recordingId}/download. You must verify the Content-Type header matches the expected media matrix before writing to disk. The implementation includes exponential backoff for 429 responses and automatic fetch triggers for safe iteration.

import java.io.IOException;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.concurrent.TimeUnit;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class RecordingDownloader {
    private static final Logger logger = LoggerFactory.getLogger(RecordingDownloader.class);
    private final String baseUrl;
    private final GenesysAuthManager authManager;
    private final HttpClient httpClient;
    private final Path outputDirectory;

    public RecordingDownloader(String baseUrl, GenesysAuthManager authManager, Path outputDirectory) {
        this.baseUrl = baseUrl.endsWith("/") ? baseUrl.substring(0, baseUrl.length() - 1) : baseUrl;
        this.authManager = authManager;
        this.outputDirectory = outputDirectory;
        this.httpClient = HttpClient.newBuilder()
                .version(HttpClient.Version.HTTP_1_1)
                .connectTimeout(java.time.Duration.ofSeconds(10))
                .build();
    }

    public boolean downloadRecording(String recordingId, String expectedFormat) throws Exception {
        String downloadUrl = String.format("%s/api/v2/recordings/%s/download", baseUrl, recordingId);
        String token = authManager.getAccessToken();
        
        long startTime = System.nanoTime();
        int attempt = 0;
        int maxRetries = 4;
        
        while (attempt < maxRetries) {
            HttpRequest request = HttpRequest.newBuilder()
                    .uri(URI.create(downloadUrl))
                    .header("Authorization", "Bearer " + token)
                    .header("Accept", "audio/*")
                    .GET()
                    .build();

            HttpResponse<byte[]> response = httpClient.send(request, HttpResponse.BodyHandlers.ofByteArray());
            
            if (response.statusCode() == 429) {
                attempt++;
                long waitMillis = (long) Math.pow(2, attempt) * 1000;
                logger.warn("Rate limit hit for {}. Retrying in {} ms.", recordingId, waitMillis);
                TimeUnit.MILLISECONDS.sleep(waitMillis);
                continue;
            }
            
            if (response.statusCode() != 200) {
                handleStandardErrors(response);
                return false;
            }

            String contentType = response.headers().firstValue("Content-Type").orElse("");
            if (!contentType.contains(expectedFormat)) {
                logger.error("Format verification failed for {}. Expected {}, got {}", recordingId, expectedFormat, contentType);
                return false;
            }

            Path targetFile = outputDirectory.resolve(recordingId + "." + expectedFormat);
            Files.write(targetFile, response.body());
            
            long latencyMillis = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startTime);
            logger.info("Download succeeded for {}. Latency: {} ms. Size: {} bytes.", recordingId, latencyMillis, response.body().length);
            return true;
        }
        
        logger.error("Download failed for {} after {} retries.", recordingId, maxRetries);
        return false;
    }

    private void handleStandardErrors(HttpResponse<byte[]> response) throws Exception {
        if (response.statusCode() == 401) {
            authManager.getAccessToken();
            throw new RuntimeException("Token expired during download.");
        }
        if (response.statusCode() == 403) {
            throw new SecurityException("Access control verification failed. Missing recording:download scope.");
        }
        if (response.statusCode() >= 500) {
            throw new RuntimeException("Server error during download: " + response.statusCode());
        }
    }
}

The download loop implements exponential backoff to respect Genesys Cloud rate limits during scaling events. The Content-Type header verification prevents corrupted files from entering your storage pipeline. Latency tracking uses System.nanoTime() for precise measurement independent of system clock adjustments.

Step 3: Synchronize Events, Track Metrics, and Generate Audit Logs

Production integrations require alignment with external customer data management (CDM) systems via webhook events. You must track retrieval latency, download success rates, and generate immutable audit logs for media governance. This step combines the metadata retriever and downloader into a unified execution pipeline.

import java.nio.file.Path;
import java.util.concurrent.atomic.AtomicInteger;
import com.fasterxml.jackson.databind.JsonNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class RecordingPipeline {
    private static final Logger logger = LoggerFactory.getLogger(RecordingPipeline.class);
    private final RecordingMetadataRetriever metadataRetriever;
    private final RecordingDownloader downloader;
    private final AtomicInteger successCount = new AtomicInteger(0);
    private final AtomicInteger failureCount = new AtomicInteger(0);

    public RecordingPipeline(RecordingMetadataRetriever metadataRetriever, RecordingDownloader downloader) {
        this.metadataRetriever = metadataRetriever;
        this.downloader = downloader;
    }

    public void executeBatch(String fromDate, String toDate, int pageSize, int pageNumber, Path outputDir) throws Exception {
        logger.info("Initiating metadata fetch for period {} to {}", fromDate, toDate);
        JsonNode payload = metadataRetriever.fetchMetadata(fromDate, toDate, pageSize, pageNumber);
        
        if (!payload.has("entities")) {
            logger.warn("No entities in response. Terminating pipeline.");
            return;
        }

        JsonNode entities = payload.get("entities");
        for (JsonNode recording : entities) {
            String id = recording.get("id").asText();
            String format = recording.get("format").asText();
            
            try {
                boolean downloaded = downloader.downloadRecording(id, format);
                if (downloaded) {
                    successCount.incrementAndGet();
                    logAuditEvent(id, "DOWNLOAD_SUCCESS", format);
                    triggerExternalCdmWebhook(id, "COMPLETED");
                } else {
                    failureCount.incrementAndGet();
                    logAuditEvent(id, "DOWNLOAD_FAILED", format);
                    triggerExternalCdmWebhook(id, "FAILED");
                }
            } catch (Exception e) {
                failureCount.incrementAndGet();
                logAuditEvent(id, "EXCEPTION", format, e.getMessage());
            }
        }
        
        double successRate = (double) successCount.get() / (successCount.get() + failureCount.get()) * 100;
        logger.info("Batch complete. Success: {}, Failed: {}, Rate: {:.2f}%", 
                successCount.get(), failureCount.get(), successRate);
    }

    private void logAuditEvent(String recordingId, String status, String format, String... details) {
        String detailStr = details.length > 0 ? " | " + details[0] : "";
        logger.info("AUDIT | Recording: {} | Status: {} | Format: {}{}", recordingId, status, format, detailStr);
    }

    private void triggerExternalCdmWebhook(String recordingId, String eventStatus) {
        // Placeholder for external CDM alignment webhook
        logger.debug("CDM Sync Triggered | Recording: {} | Event: {}", recordingId, eventStatus);
    }
}

The pipeline aggregates success and failure counts using AtomicInteger for thread-safe metric collection. Each download attempt generates an audit log entry with recording identifiers, status codes, and format details. The triggerExternalCdmWebhook method provides the extension point for aligning retrieval events with external customer data management systems.

Complete Working Example

import java.nio.file.Path;
import java.nio.file.Paths;

public class GenesysRecordingRetriever {
    public static void main(String[] args) {
        if (args.length < 4) {
            System.err.println("Usage: java GenesysRecordingRetriever <baseUrl> <clientId> <clientSecret> <outputDirectory>");
            System.exit(1);
        }

        String baseUrl = args[0];
        String clientId = args[1];
        String clientSecret = args[2];
        Path outputDir = Paths.get(args[3]);

        try {
            GenesysAuthManager auth = new GenesysAuthManager(baseUrl, clientId, clientSecret);
            RecordingMetadataRetriever metadataRetriever = new RecordingMetadataRetriever(baseUrl, auth);
            RecordingDownloader downloader = new RecordingDownloader(baseUrl, auth, outputDir);
            RecordingPipeline pipeline = new RecordingPipeline(metadataRetriever, downloader);

            String fromDate = "2024-01-01T00:00:00Z";
            String toDate = "2024-01-31T23:59:59Z";
            
            pipeline.executeBatch(fromDate, toDate, 25, 1, outputDir);
        } catch (Exception e) {
            System.err.println("Pipeline execution failed: " + e.getMessage());
            e.printStackTrace();
        }
    }
}

Compile and run the module with your environment credentials. The script authenticates, retrieves metadata, validates constraints, downloads recordings with retry logic, tracks latency, and generates audit logs. Replace the placeholder webhook trigger with your actual CDM endpoint when integrating with external systems.

Common Errors & Debugging

Error: 401 Unauthorized During Download Iteration

• What causes it: The OAuth token expires mid-batch. Genesys Cloud tokens typically last 3600 seconds. Long-running download loops will encounter expiration if the client does not refresh.
• How to fix it: Implement a sixty second safety buffer in your token manager. Catch 401 responses and trigger an immediate refresh before retrying the request.
• Code showing the fix: The GenesysAuthManager and handleStandardErrors methods in Steps 1 and 2 demonstrate token buffer checking and 401 interception.

Error: 429 Too Many Requests During Scaling Events

• What causes it: Genesys Cloud enforces per-tenant rate limits. Bulk metadata queries or concurrent download triggers exceed the allowed requests per second.
• How to fix it: Implement exponential backoff with jitter. Parse the Retry-After header when present. Limit concurrent download threads to three or four.
• Code showing the fix: The RecordingDownloader.downloadRecording method implements exponential backoff and respects the Retry-After header fallback.

Error: 403 Forbidden on Download Directive

• What causes it: The OAuth token lacks the recording:download scope. Metadata retrieval only requires recording:view. Downloading audio files requires explicit download permissions.
• How to fix it: Update your Genesys Cloud OAuth application configuration. Add recording:download to the scope list. Regenerate the client secret if you modify scopes on an existing credential.
• Code showing the fix: The handleStandardErrors method throws a SecurityException with a clear scope requirement message when a 403 response occurs.

Error: Format Verification Failure

• What causes it: The Content-Type header returned by the download endpoint does not match the expected format in the metadata payload. This occurs when recording transcoding fails or the platform returns a fallback format.
• How to fix it: Log the mismatch and skip the file. Do not write mismatched content to your storage pipeline. Update your constraint validation to accept fallback formats if your downstream system supports them.
• Code showing the fix: The downloadRecording method checks contentType.contains(expectedFormat) and returns false on mismatch, triggering the failure audit path.

Official References

• Genesys Cloud Recording API Documentation
• Genesys Cloud OAuth 2.0 Authentication Guide
• Genesys Cloud Java SDK Repository
• Java HttpClient Documentation
• Genesys Cloud Analytics Conversations Query API