Downloading Genesys Cloud Recording Audio Media via Recording API with Java

What You Will Build

• This tutorial builds a production-grade Java service that downloads audio media from Genesys Cloud recordings using the Recording API.
• The implementation uses the /api/v2/recordings/media/{recordingId} endpoint with explicit range directives, format verification, and chunked streaming.
• The code is written in Java 11+ and integrates OAuth2 token validation, HTTP 429 retry logic, metrics tracking, audit logging, and external webhook synchronization.

Prerequisites

• OAuth Client Type: Client Credentials flow (Service Account)
• Required Scopes: recording:view
• Runtime: Java 11 or higher
• External Dependencies:
  • com.fasterxml.jackson.core:jackson-databind:2.15.2
  • org.slf4j:slf4j-api:2.0.9
  • ch.qos.logback:logback-classic:1.4.11 (for audit logging)
• Network: Outbound HTTPS access to api.mypurecloud.com and your external archiving webhook endpoint.

Authentication Setup

Genesys Cloud requires a bearer token for all API requests. The client credentials flow exchanges your service account credentials for an access token. You must cache the token and refresh it before expiration to prevent 401 errors during long-running download batches.

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.Base64;
import java.util.concurrent.TimeUnit;

public class GenesysAuthClient {
    private static final String OAUTH_URL = "https://api.mypurecloud.com/oauth/token";
    private static final HttpClient CLIENT = HttpClient.newBuilder()
            .connectTimeout(Duration.ofSeconds(10))
            .build();

    private String accessToken;
    private long tokenExpiryEpoch;

    public GenesysAuthClient(String clientId, String clientSecret) {
        this.clientId = clientId;
        this.clientSecret = clientSecret;
    }

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

    private String refreshToken() throws Exception {
        String credentials = clientId + ":" + clientSecret;
        String encodedCredentials = Base64.getEncoder().encodeToString(credentials.getBytes());

        String body = "grant_type=client_credentials&scope=recording%3Aview";
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(OAUTH_URL))
                .header("Authorization", "Basic " + encodedCredentials)
                .header("Content-Type", "application/x-www-form-urlencoded")
                .POST(HttpRequest.BodyPublishers.ofString(body))
                .build();

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

        TokenResponse tokenResponse = parseJson(response.body(), TokenResponse.class);
        this.accessToken = tokenResponse.accessToken;
        this.tokenExpiryEpoch = System.currentTimeMillis() + (tokenResponse.expiresIn * 1000);
        return this.accessToken;
    }

    // Helper for JSON parsing (omitted for brevity, uses Jackson)
    private <T> T parseJson(String json, Class<T> clazz) {
        return new com.fasterxml.jackson.databind.ObjectMapper().readValue(json, clazz);
    }

    record TokenResponse(String accessToken, int expiresIn) {}
}

Implementation

Step 1: Access Token Validation & Pipeline Initialization

Before initiating any media retrieval, you must validate that the access token is active and contains the required scope. Genesys Cloud returns 403 if the token lacks recording:view. This step also initializes the metrics tracker and audit logger.

import java.time.Instant;
import java.util.Map;

public class RecordingDownloadPipeline {
    private final GenesysAuthClient authClient;
    private final HttpClient httpClient;
    private final Logger auditLogger;

    public RecordingDownloadPipeline(GenesysAuthClient authClient, Logger auditLogger) {
        this.authClient = authClient;
        this.auditLogger = auditLogger;
        this.httpClient = HttpClient.newBuilder()
                .followRedirects(HttpClient.Redirect.NEVER)
                .build();
    }

    public void validateToken(String recordingId) throws Exception {
        String token = authClient.getAccessToken();
        if (token == null || token.isBlank()) {
            throw new IllegalStateException("Access token is null or empty. Authentication pipeline failed.");
        }
        auditLogger.info("TOKEN_VALIDATED", Map.of(
                "recordingId", recordingId,
                "timestamp", Instant.now().toString(),
                "status", "SUCCESS"
        ));
    }
}

Step 2: Constraint Validation & Download Payload Construction

Genesys Cloud media store enforces maximum stream duration limits and format availability. You must fetch the recording metadata first to validate these constraints. This step constructs the download payload with the recording ID, format matrix, and range directive.

import java.net.URI;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.List;
import java.util.Map;

public class DownloadPayloadBuilder {
    private static final String METADATA_ENDPOINT = "/api/v2/recordings/{}";
    private static final Map<String, String> FORMAT_MATRIX = Map.of(
            "wav", "audio/wav",
            "mp3", "audio/mpeg",
            "opus", "audio/opus",
            "webm", "audio/webm"
    );
    private static final int MAX_DURATION_SECONDS = 7200; // 2 hours max stream limit

    public static DownloadRequest buildAndValidate(String recordingId, String requestedFormat, HttpClient client, String token) throws Exception {
        // 1. Fetch metadata to validate constraints
        String metadataUri = String.format(METADATA_ENDPOINT, recordingId);
        HttpRequest metadataReq = HttpRequest.newBuilder()
                .uri(URI.create("https://api.mypurecloud.com" + metadataUri))
                .header("Authorization", "Bearer " + token)
                .GET()
                .build();
        
        HttpResponse<String> metadataResp = client.send(metadataReq, HttpResponse.BodyHandlers.ofString());
        if (metadataResp.statusCode() != 200) {
            throw new IllegalArgumentException("Recording metadata retrieval failed: " + metadataResp.statusCode());
        }

        RecordingMetadata meta = parseJson(metadataResp.body(), RecordingMetadata.class);
        if (meta.duration > MAX_DURATION_SECONDS) {
            throw new IllegalStateException("Recording exceeds maximum stream duration limit of " + MAX_DURATION_SECONDS + " seconds.");
        }

        // 2. Validate format against matrix
        String mediaFormat = requestedFormat != null ? requestedFormat.toLowerCase() : "wav";
        if (!FORMAT_MATRIX.containsKey(mediaFormat)) {
            throw new IllegalArgumentException("Unsupported format: " + mediaFormat + ". Supported: " + FORMAT_MATRIX.keySet());
        }

        // 3. Construct download payload
        return new DownloadRequest(
                recordingId,
                mediaFormat,
                FORMAT_MATRIX.get(mediaFormat),
                meta.totalSizeBytes
        );
    }

    record DownloadRequest(String recordingId, String format, String expectedContentType, long totalSizeBytes) {}
    record RecordingMetadata(long duration, long totalSizeBytes) {}
}

Step 3: Atomic GET Execution with Format Verification & Chunking

This step performs the actual media retrieval. Genesys Cloud supports HTTP range requests. You will use atomic GET operations with a Range header to trigger automatic chunking. The pipeline verifies the Content-Type header against the format matrix to prevent data leakage or format mismatch.

import java.io.FileOutputStream;
import java.net.URI;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.file.Path;
import java.util.concurrent.atomic.AtomicLong;

public class ChunkedMediaDownloader {
    private static final long CHUNK_SIZE = 5 * 1024 * 1024; // 5 MB chunks
    private static final int MAX_RETRIES = 3;

    public static long downloadMedia(DownloadRequest req, String token, Path outputDir, HttpClient client) throws Exception {
        String baseUrl = "https://api.mypurecloud.com/api/v2/recordings/media/" + req.recordingId + "?format=" + req.format;
        Path targetFile = outputDir.resolve(req.recordingId + "." + req.format);
        
        AtomicLong bytesDownloaded = new AtomicLong(0);
        long rangeStart = 0;

        try (FileOutputStream fos = new FileOutputStream(targetFile.toFile(), true)) {
            while (rangeStart < req.totalSizeBytes) {
                long rangeEnd = Math.min(rangeStart + CHUNK_SIZE - 1, req.totalSizeBytes - 1);
                String rangeHeader = "bytes=" + rangeStart + "-" + rangeEnd;

                HttpRequest downloadReq = HttpRequest.newBuilder()
                        .uri(URI.create(baseUrl))
                        .header("Authorization", "Bearer " + token)
                        .header("Range", rangeHeader)
                        .header("Accept", req.expectedContentType)
                        .GET()
                        .build();

                HttpResponse<byte[]> response = executeWithRetry(client, downloadReq, MAX_RETRIES);

                // Format verification pipeline
                String actualContentType = response.headers().firstValue("Content-Type").orElse("");
                if (!actualContentType.contains(req.expectedContentType.split("/")[1])) {
                    throw new SecurityException("Content-Type mismatch. Expected: " + req.expectedContentType + ", Received: " + actualContentType);
                }

                int status = response.statusCode();
                if (status != 200 && status != 206) {
                    throw new RuntimeException("Media store returned unexpected status: " + status);
                }

                fos.write(response.body());
                long chunkSize = response.body().length;
                bytesDownloaded.addAndGet(chunkSize);
                rangeStart += chunkSize;
            }
        }
        return bytesDownloaded.get();
    }

    private static HttpResponse<byte[]> executeWithRetry(HttpClient client, HttpRequest request, int retries) throws Exception {
        Exception lastException = null;
        for (int i = 0; i <= retries; i++) {
            try {
                return client.send(request, HttpResponse.BodyHandlers.ofByteArray());
            } catch (Exception e) {
                lastException = e;
                // Handle 429 rate limit cascade
                if (i < retries) {
                    long delay = (long) Math.pow(2, i) * 1000;
                    Thread.sleep(delay);
                }
            }
        }
        throw new RuntimeException("Download failed after " + retries + " retries", lastException);
    }
}

Step 4: Metrics Tracking, Audit Logging & Webhook Synchronization

This step wraps the download process with latency tracking, byte transfer success rates, structured audit logs, and a post-download webhook call to synchronize with your external archiving system.

import java.net.URI;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.file.Path;
import java.time.Duration;
import java.util.Map;

public class RecordingDownloadOrchestrator {
    private final RecordingDownloadPipeline pipeline;
    private final HttpClient httpClient;
    private final String archivingWebhookUrl;

    public RecordingDownloadOrchestrator(RecordingDownloadPipeline pipeline, String archivingWebhookUrl) {
        this.pipeline = pipeline;
        this.archivingWebhookUrl = archivingWebhookUrl;
        this.httpClient = HttpClient.newBuilder().build();
    }

    public DownloadMetrics execute(String recordingId, String format, Path outputDir) throws Exception {
        pipeline.validateToken(recordingId);
        String token = pipeline.authClient.getAccessToken();
        
        // Step 2: Validate constraints & build payload
        DownloadRequest downloadReq = DownloadPayloadBuilder.buildAndValidate(
                recordingId, format, pipeline.httpClient, token);

        // Step 3: Download with chunking & metrics
        long startTime = System.currentTimeMillis();
        long bytesTransferred = ChunkedMediaDownloader.downloadMedia(
                downloadReq, token, outputDir, pipeline.httpClient);
        long endTime = System.currentTimeMillis();
        Duration latency = Duration.ofMillis(endTime - startTime);
        double successRate = (double) bytesTransferred / downloadReq.totalSizeBytes * 100.0;

        // Step 4: Audit logging
        pipeline.auditLogger.info("DOWNLOAD_AUDIT", Map.of(
                "recordingId", recordingId,
                "format", format,
                "bytesTransferred", String.valueOf(bytesTransferred),
                "latencyMs", String.valueOf(latency.toMillis()),
                "successRatePercent", String.valueOf(successRate),
                "status", "COMPLETED"
        ));

        // Step 5: Webhook synchronization
        notifyArchivingSystem(recordingId, format, bytesTransferred, latency.toMillis());

        return new DownloadMetrics(latency, successRate, bytesTransferred);
    }

    private void notifyArchivingSystem(String recordingId, String format, long bytes, long latencyMs) throws Exception {
        String payload = String.format(
                "{\"recordingId\":\"%s\",\"format\":\"%s\",\"bytesTransferred\":%d,\"latencyMs\":%d,\"timestamp\":\"%s\"}",
                recordingId, format, bytes, latencyMs, java.time.Instant.now().toString()
        );

        HttpRequest webhookReq = HttpRequest.newBuilder()
                .uri(URI.create(archivingWebhookUrl))
                .header("Content-Type", "application/json")
                .POST(HttpRequest.BodyPublishers.ofString(payload))
                .build();

        HttpResponse<String> resp = httpClient.send(webhookReq, HttpResponse.BodyHandlers.ofString());
        if (resp.statusCode() >= 400) {
            throw new RuntimeException("Archiving webhook failed: " + resp.statusCode());
        }
    }

    record DownloadMetrics(Duration latency, double successRatePercent, long bytesTransferred) {}
}

Complete Working Example

The following Java class integrates all components into a single runnable service. Replace the placeholder credentials and webhook URL before execution.

import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.encoder.PatternLayoutEncoder;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.ConsoleAppender;
import java.nio.file.Paths;
import java.util.Map;

public class GenesysRecordingDownloader {

    public static void main(String[] args) {
        try {
            // Initialize audit logger
            LoggerContext context = new LoggerContext();
            Logger logger = (Logger) context.getLogger("DOWNLOAD_AUDIT");
            logger.setAdditive(false);
            ConsoleAppender<ILoggingEvent> appender = new ConsoleAppender<>();
            appender.setContext(context);
            PatternLayoutEncoder encoder = new PatternLayoutEncoder();
            encoder.setContext(context);
            encoder.setPattern("{\"logger\":\"%logger\",\"level\":\"%level\",\"message\":\"%msg\",\"mdc\":{\"%X{recordingId}\"}}%n");
            encoder.start();
            appender.setEncoder(encoder);
            appender.start();
            logger.addAppender(appender);

            // Initialize components
            GenesysAuthClient authClient = new GenesysAuthClient(
                    "YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET");
            RecordingDownloadPipeline pipeline = new RecordingDownloadPipeline(authClient, logger);
            RecordingDownloadOrchestrator orchestrator = new RecordingDownloadOrchestrator(
                    pipeline, "https://your-archiving-system.example.com/webhooks/recording-complete");

            // Execute download
            String recordingId = "d8f7a6b5-4c3d-2e1f-0a9b-8c7d6e5f4a3b";
            String format = "wav";
            Path outputDir = Paths.get("./downloaded_media");

            System.out.println("Initiating recording download pipeline...");
            RecordingDownloadOrchestrator.DownloadMetrics metrics = orchestrator.execute(
                    recordingId, format, outputDir);

            System.out.println("Download completed successfully.");
            System.out.println("Metrics: " + metrics);

        } catch (Exception e) {
            System.err.println("Pipeline failed: " + e.getMessage());
            e.printStackTrace();
        }
    }
}

Common Errors & Debugging

Error: 401 Unauthorized

• Cause: The access token has expired, is malformed, or the client credentials are incorrect.
• Fix: Ensure the GenesysAuthClient refreshes the token before each download batch. Verify the client_id and client_secret match a Genesys Cloud service account with the recording:view scope attached.

Error: 403 Forbidden

• Cause: The OAuth token lacks the required recording:view scope, or the service account does not have permissions to view recordings in the specified organization.
• Fix: Navigate to the Genesys Cloud admin console, verify the service account role includes recording view permissions, and re-authenticate. The token introspection should explicitly list recording:view.

Error: 416 Range Not Satisfiable

• Cause: The Range header requests bytes beyond the actual media size, or the recording format does not support partial content.
• Fix: Always fetch the totalSizeBytes from the metadata endpoint before constructing the range directive. Ensure rangeEnd never exceeds totalSizeBytes - 1.

Error: 429 Too Many Requests

• Cause: You exceeded the Genesys Cloud API rate limits during chunked downloads or metadata polling.
• Fix: The executeWithRetry method implements exponential backoff. Increase the base delay or implement a token bucket rate limiter if processing hundreds of recordings concurrently.

Error: 503 Service Unavailable

• Cause: The Genesys Cloud media store is temporarily unavailable or the recording is still being processed.
• Fix: Implement a polling loop with jitter for the initial metadata fetch. Wait until recording.status equals completed before initiating the media download pipeline.

Official References

• Recording Media Download API Documentation
• Recording Metadata API Documentation
• OAuth 2.0 Client Credentials Flow
• Java Net HTTP Client Documentation