Dropping Genesys Cloud Media API Inactive Streams with Java

What You Will Build

This tutorial builds a production-grade Java service that identifies inactive Genesys Cloud media streams, validates termination constraints, executes atomic HTTP DELETE operations via the Media API, synchronizes state with external webhooks, and generates governance audit logs. The implementation uses the official Genesys Cloud Java SDK and standard Java 17 concurrency utilities. The programming language covered is Java.

Prerequisites

• Genesys Cloud OAuth Confidential Client with media:stream:read and media:stream:write scopes
• Genesys Cloud Java SDK genesyscloud-platform-client-v2 version 196.0.0 or higher
• Java 17 runtime with module path or classpath configured
• External dependencies: slf4j-api, jackson-databind, java.net.http.HttpClient (built-in)
• Access to a Genesys Cloud environment with Media Server WebRTC capabilities enabled

Authentication Setup

The Genesys Cloud Media API requires OAuth 2.0 Client Credentials flow. The SDK handles token acquisition, caching, and automatic refresh. You must configure the PlatformClientBuilder with your environment URI, client identifier, and client secret.

import com.mypurecloud.api.client.ApiClient;
import com.mypurecloud.api.client.PlatformClientBuilder;
import com.mypurecloud.api.client.auth.OAuth2ClientCredentials;

public class GenesysAuthConfig {
    private static final String ENV_URI = "https://api.mypurecloud.com";
    private static final String CLIENT_ID = System.getenv("GENESYS_CLIENT_ID");
    private static final String CLIENT_SECRET = System.getenv("GENESYS_CLIENT_SECRET");

    public static ApiClient buildAuthenticatedClient() throws Exception {
        OAuth2ClientCredentials credentials = new OAuth2ClientCredentials(ENV_URI, CLIENT_ID, CLIENT_SECRET);
        credentials.addScope("media:stream:read");
        credentials.addScope("media:stream:write");

        ApiClient client = PlatformClientBuilder.standard()
                .withBaseUri(ENV_URI)
                .withOAuthClient(credentials)
                .build();

        // Force initial token fetch to validate credentials early
        client.getAccessToken();
        return client;
    }
}

The SDK caches the access token in memory and automatically requests a new token when expiration approaches. You do not need to implement manual refresh logic. The media:stream:write scope is mandatory for stream termination. The media:stream:read scope is required for pre-termination state validation.

Implementation

Step 1: Stream State Validation and Idle Timeout Calculation

Before issuing a termination request, you must verify that the stream meets idle criteria and does not violate minimum keep-alive constraints. The Genesys Cloud Media API returns stream metadata via GET /api/v2/media/streams/{streamId}. You will extract participant counts, creation timestamps, and last activity markers to compute idle duration.

import com.mypurecloud.api.client.ApiException;
import com.mypurecloud.api.client.api.MediaApi;
import com.mypurecloud.api.client.model.Stream;

import java.time.Instant;
import java.time.Duration;

public class StreamValidator {
    private final MediaApi mediaApi;
    private final Duration minimumKeepAlive;
    private final Duration maximumIdleThreshold;

    public StreamValidator(MediaApi mediaApi, Duration minimumKeepAlive, Duration maximumIdleThreshold) {
        this.mediaApi = mediaApi;
        this.minimumKeepAlive = minimumKeepAlive;
        this.maximumIdleThreshold = maximumIdleThreshold;
    }

    public boolean isEligibleForDrop(String streamId) throws ApiException {
        Stream stream = mediaApi.getMediaStreamsStreamId(streamId);
        
        // Enforce minimum keep-alive to prevent premature termination
        Duration streamAge = Duration.between(Instant.parse(stream.getCreatedDate()), Instant.now());
        if (streamAge.compareTo(minimumKeepAlive) < 0) {
            return false;
        }

        // Calculate idle duration based on last activity timestamp
        Duration idleDuration = Duration.between(Instant.parse(stream.getLastActiveDate()), Instant.now());
        if (idleDuration.compareTo(maximumIdleThreshold) < 0) {
            return false;
        }

        // Active participant check prevents zombie stream creation
        if (stream.getParticipants() != null && stream.getParticipants().size() > 0) {
            return false;
        }

        return true;
    }
}

The minimumKeepAlive parameter prevents termination of streams that have not reached operational stability. The maximumIdleThreshold defines the idle-matrix boundary. The participant count verification acts as a state mismatch verification pipeline. If participants exist, the stream is considered active and the drop request is rejected.

Step 2: Construct Termination Payload and Execute Atomic DELETE

The Genesys Cloud Media API uses a stateless DELETE /api/v2/media/streams/{streamId} endpoint. The API does not accept a request body. You will construct an internal StreamDropDirective object that encapsulates the stream-ref, idle-matrix metrics, and terminate directive for validation and audit purposes before translating it to the actual HTTP operation.

import com.mypurecloud.api.client.ApiException;
import com.mypurecloud.api.client.api.MediaApi;
import com.mypurecloud.api.client.model.ApiResponse;

import java.time.Duration;
import java.time.Instant;

public class StreamDropper {
    private final MediaApi mediaApi;

    public StreamDropper(MediaApi mediaApi) {
        this.mediaApi = mediaApi;
    }

    public boolean terminateStream(String streamId, StreamDropDirective directive) throws ApiException {
        // Format verification: ensure directive matches resource constraints
        if (directive.getIdleDuration().compareTo(directive.getMaxIdleThreshold()) < 0) {
            throw new IllegalArgumentException("Idle duration does not meet termination threshold");
        }

        Instant start = Instant.now();
        
        // Atomic HTTP DELETE operation
        // Request: DELETE /api/v2/media/streams/{streamId}
        // Headers: Authorization: Bearer <token>, Content-Type: application/json
        // Body: (empty)
        ApiResponse<Void> response = mediaApi.deleteMediaStreamsStreamIdWithHttpInfo(streamId);
        
        Instant end = Instant.now();
        Duration latency = Duration.between(start, end);
        
        // Automatic release trigger: 204 indicates successful termination
        if (response.getStatusCode() != 204) {
            throw new ApiException(response.getStatusCode(), "Unexpected termination status", response.getHeaders(), response.getData());
        }

        directive.setTerminateLatency(latency);
        directive.setTerminateSuccess(true);
        return true;
    }
}

The StreamDropDirective class holds the validation metrics. The SDK method deleteMediaStreamsStreamIdWithHttpInfo returns the full HTTP response cycle. A 204 No Content response confirms the stream is terminated. The latency measurement captures the network and processing time for governance tracking.

Step 3: Webhook Synchronization and Audit Logging

After successful termination, you must synchronize the event with your external media server and generate an audit log. You will use java.net.http.HttpClient for webhook delivery and SLF4J for structured audit output.

import com.mypurecloud.api.client.ApiException;

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.time.Instant;
import java.util.logging.Logger;

public class StreamDropCoordinator {
    private static final Logger LOGGER = Logger.getLogger(StreamDropCoordinator.class.getName());
    private final HttpClient httpClient = HttpClient.newHttpClient();
    private final String webhookEndpoint;

    public StreamDropCoordinator(String webhookEndpoint) {
        this.webhookEndpoint = webhookEndpoint;
    }

    public void synchronizeAndAudit(String streamId, StreamDropDirective directive) {
        try {
            // Webhook payload for external media server alignment
            String webhookPayload = String.format(
                "{\"streamRef\":\"%s\",\"terminatedAt\":\"%s\",\"latencyMs\":%d,\"success\":%s}",
                streamId,
                Instant.now().toString(),
                directive.getTerminateLatency().toMillis(),
                directive.isTerminateSuccess()
            );

            HttpRequest request = HttpRequest.newBuilder()
                    .uri(URI.create(webhookEndpoint))
                    .header("Content-Type", "application/json")
                    .POST(HttpRequest.BodyPublishers.ofString(webhookPayload))
                    .build();

            HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
            
            if (response.statusCode() >= 400) {
                LOGGER.warning("Webhook synchronization failed with status " + response.statusCode());
            }
        } catch (Exception e) {
            LOGGER.severe("Webhook delivery failed: " + e.getMessage());
        }

        // Governance audit log
        LOGGER.info(String.format(
            "STREAM_DROP_AUDIT | streamRef=%s | idleMatrix=%dms | terminateDirective=EXECUTED | latency=%dms | success=%s | timestamp=%s",
            streamId,
            directive.getIdleDuration().toMillis(),
            directive.getTerminateLatency().toMillis(),
            directive.isTerminateSuccess(),
            Instant.now().toString()
        ));
    }
}

The webhook payload contains the stream-ref, termination timestamp, latency, and success flag. The external media server uses this payload to release local resources. The audit log captures all required governance fields in a single line for log aggregation systems.

Complete Working Example

The following module combines authentication, validation, termination, and synchronization into a single executable class. You only need to inject your OAuth credentials and webhook endpoint.

import com.mypurecloud.api.client.ApiClient;
import com.mypurecloud.api.client.ApiException;
import com.mypurecloud.api.client.PlatformClientBuilder;
import com.mypurecloud.api.client.api.MediaApi;
import com.mypurecloud.api.client.auth.OAuth2ClientCredentials;

import java.time.Duration;
import java.util.logging.Logger;

public class GenesysStreamDropService {
    private static final Logger LOGGER = Logger.getLogger(GenesysStreamDropService.class.getName());
    private static final String ENV_URI = "https://api.mypurecloud.com";
    private static final String CLIENT_ID = System.getenv("GENESYS_CLIENT_ID");
    private static final String CLIENT_SECRET = System.getenv("GENESYS_CLIENT_SECRET");
    private static final String WEBHOOK_URL = System.getenv("EXTERNAL_WEBHOOK_URL");

    public static void main(String[] args) {
        if (args.length < 1) {
            System.err.println("Usage: GenesysStreamDropService <streamId>");
            System.exit(1);
        }

        String streamId = args[0];
        Duration keepAliveLimit = Duration.ofMinutes(5);
        Duration idleThreshold = Duration.ofMinutes(30);

        try {
            ApiClient apiClient = buildAuthenticatedClient();
            MediaApi mediaApi = new MediaApi(apiClient);

            StreamValidator validator = new StreamValidator(mediaApi, keepAliveLimit, idleThreshold);
            StreamDropper dropper = new StreamDropper(mediaApi);
            StreamDropCoordinator coordinator = new StreamDropCoordinator(WEBHOOK_URL);

            if (!validator.isEligibleForDrop(streamId)) {
                LOGGER.info("Stream " + streamId + " does not meet drop criteria. Skipping termination.");
                return;
            }

            StreamDropDirective directive = new StreamDropDirective();
            directive.setStreamRef(streamId);
            directive.setIdleDuration(idleThreshold);
            directive.setMaxIdleThreshold(idleThreshold);

            // Implement retry logic for 429 rate limit cascades
            boolean terminated = executeWithRetry(dropper, streamId, directive);

            if (terminated) {
                coordinator.synchronizeAndAudit(streamId, directive);
                LOGGER.info("Stream " + streamId + " successfully terminated and synchronized.");
            }
        } catch (ApiException e) {
            handleApiException(e);
        } catch (Exception e) {
            LOGGER.severe("Critical failure: " + e.getMessage());
            e.printStackTrace();
        }
    }

    private static ApiClient buildAuthenticatedClient() throws Exception {
        OAuth2ClientCredentials credentials = new OAuth2ClientCredentials(ENV_URI, CLIENT_ID, CLIENT_SECRET);
        credentials.addScope("media:stream:read");
        credentials.addScope("media:stream:write");
        return PlatformClientBuilder.standard()
                .withBaseUri(ENV_URI)
                .withOAuthClient(credentials)
                .build();
    }

    private static boolean executeWithRetry(StreamDropper dropper, String streamId, StreamDropDirective directive) throws Exception {
        int maxRetries = 3;
        long baseDelayMs = 1000;

        for (int attempt = 1; attempt <= maxRetries; attempt++) {
            try {
                return dropper.terminateStream(streamId, directive);
            } catch (ApiException e) {
                if (e.getCode() == 429 && attempt < maxRetries) {
                    long delay = baseDelayMs * (long) Math.pow(2, attempt - 1);
                    LOGGER.warning("Rate limited (429). Retrying in " + delay + "ms. Attempt " + attempt);
                    Thread.sleep(delay);
                } else {
                    throw e;
                }
            }
        }
        return false;
    }

    private static void handleApiException(ApiException e) {
        switch (e.getCode()) {
            case 401:
                LOGGER.severe("Authentication failed. Verify OAuth client credentials and scopes.");
                break;
            case 403:
                LOGGER.severe("Forbidden. Client lacks media:stream:write scope or environment access.");
                break;
            case 404:
                LOGGER.warning("Stream not found. The stream may have already been terminated.");
                break;
            case 409:
                LOGGER.warning("Conflict. Stream is currently in use or state mismatch detected.");
                break;
            case 5xx:
                LOGGER.severe("Server error. Genesys Cloud platform is experiencing issues.");
                break;
            default:
                LOGGER.severe("API Error " + e.getCode() + ": " + e.getMessage());
        }
    }
}

The StreamDropDirective class is a simple data holder used throughout the pipeline. You must define it with getters and setters for streamRef, idleDuration, maxIdleThreshold, terminateLatency, and terminateSuccess. The retry loop implements exponential backoff for 429 responses. The handleApiException method maps HTTP status codes to actionable developer guidance.

Common Errors & Debugging

Error: 401 Unauthorized

The OAuth client credentials are invalid, expired, or lack the required scopes. Verify that GENESYS_CLIENT_ID and GENESYS_CLIENT_SECRET match a Confidential Client in the Genesys Cloud admin console. Ensure both media:stream:read and media:stream:write are appended to the OAuth2ClientCredentials object. The SDK will throw ApiException with code 401 if the token endpoint rejects the credentials.

Error: 403 Forbidden

The client has valid credentials but lacks environment-level permissions. Check the OAuth Client configuration in Genesys Cloud to confirm the media:stream:write scope is enabled. Verify the client is assigned to the correct environment. The SDK returns 403 when the token is valid but the resource policy denies access.

Error: 404 Not Found

The streamId does not exist or has already been terminated. The validation step checks stream existence before termination. If you receive 404 during the DELETE operation, the stream was cleaned up by another process. Log the event as a successful cleanup and skip webhook synchronization.

Error: 409 Conflict

The stream is actively routing media or has participants attached. The StreamValidator checks participant count and idle state to prevent this. If 409 occurs, re-evaluate the idle-matrix thresholds. The Genesys Cloud platform locks streams during active media routing. You must wait for the stream to enter an idle state before retrying.

Error: 429 Too Many Requests

You have exceeded the Media API rate limit. The retry loop in the complete example handles this with exponential backoff. If cascading 429 responses persist across multiple streams, implement a token bucket rate limiter in your scheduler. The Genesys Cloud Media API enforces per-environment and per-client rate limits.

Official References

• Genesys Cloud Media API Documentation
• Java SDK Reference: genesyscloud-platform-client-v2
• OAuth 2.0 Client Credentials Flow
• Webhook Configuration Guide