Synchronizing Genesys Cloud SCIM Group Hierarchies with Java

What You Will Build

You will build a Java client that traverses an Active Directory LDAP tree, maps nested organizational units to parent-child group relationships, and pushes RFC 7643 compliant group structures to Genesys Cloud. The client resolves circular dependency errors by flattening hierarchy levels during traversal. The client verifies synchronization completeness by comparing target member counts against source directory reports.

Prerequisites

• OAuth client type: Confidential client (Client Credentials Flow)
• Required scopes: scim:admin:read, scim:admin:write
• SDK version: genesyscloud-java-client v10.0.0 or later
• Runtime: Java 17 or later
• External dependencies:
  • com.mypurecloud:genesyscloud-java-client:10.0.0
  • com.unboundid:unboundid-ldapsdk:6.0.5
  • com.fasterxml.jackson.core:jackson-databind:2.15.2
  • org.slf4j:slf4j-api:2.0.9

Authentication Setup

Genesys Cloud requires a bearer token for all SCIM operations. The following implementation uses the official SDK OAuthClient to request and cache tokens. The cache includes expiration tracking and automatic refresh logic to prevent 401 interruptions during bulk operations.

import com.genesiscloud.platform.client.ApiClient;
import com.genesiscloud.platform.client.auth.OAuthClient;
import com.genesiscloud.platform.client.auth.OAuthToken;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.time.Instant;
import java.util.concurrent.locks.ReentrantLock;

public class GenesysCloudAuthManager {
    private static final Logger logger = LoggerFactory.getLogger(GenesysCloudAuthManager.class);
    private final ApiClient apiClient;
    private volatile OAuthToken cachedToken;
    private final ReentrantLock tokenLock = new ReentrantLock();

    public GenesysCloudAuthManager(String environment, String clientId, String clientSecret) {
        this.apiClient = new ApiClient(environment);
    }

    public String getAccessToken() throws Exception {
        if (cachedToken != null && !isTokenExpired()) {
            return cachedToken.getAccessToken();
        }

        tokenLock.lock();
        try {
            // Double-check after acquiring lock
            if (cachedToken != null && !isTokenExpired()) {
                return cachedToken.getAccessToken();
            }
            
            OAuthClient oauthClient = new OAuthClient(apiClient);
            cachedToken = oauthClient.requestTokenWithClientCredentials(
                null, // grant_type defaults to client_credentials
                null   // scope defaults to configured client permissions
            );
            logger.info("OAuth token refreshed successfully.");
            return cachedToken.getAccessToken();
        } finally {
            tokenLock.unlock();
        }
    }

    private boolean isTokenExpired() {
        if (cachedToken == null || cachedToken.getExpiresIn() == null) return true;
        // Subtract 30 seconds for safety margin
        return Instant.now().plusSeconds(30).isAfter(
            Instant.ofEpochSecond(cachedToken.getExpiresIn())
        );
    }
}

Implementation

Step 1: LDAP Traversal and Organizational Unit Mapping

The client connects to Active Directory and performs a base-level search for all organizational units. Each OU becomes a candidate SCIM group. The traversal records direct parent-child relationships using distinguished names.

import com.unboundid.ldap.sdk.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.*;
import java.util.concurrent.ConcurrentHashMap;

public class LdapHierarchyMapper {
    private static final Logger logger = LoggerFactory.getLogger(LdapHierarchyMapper.class);
    private final Map<String, LdapOuNode> ouMap = new ConcurrentHashMap<>();

    public static class LdapOuNode {
        public final String dn;
        public final String displayName;
        public final String parentDn;
        public final List<String> childDns = new ArrayList<>();
        public final List<String> memberDns = new ArrayList<>();

        public LdapOuNode(String dn, String displayName, String parentDn) {
            this.dn = dn;
            this.displayName = displayName;
            this.parentDn = parentDn;
        }
    }

    public void traverseAndMap(String ldapHost, int ldapPort, String bindDn, String bindPassword, String baseDn) throws Exception {
        try (LDAPConnection connection = new LDAPConnection(ldapHost, ldapPort)) {
            connection.bind(new SimpleBindRequest(bindDn, bindPassword));
            
            SearchRequest searchRequest = new SearchRequest(
                baseDn,
                SearchScope.SUB,
                "(objectClass=organizationalUnit)",
                "distinguishedName", "name", "member"
            );
            
            SearchResult searchResult = connection.search(searchRequest);
            
            for (SearchResultEntry entry : searchResult.getSearchEntries()) {
                String dn = entry.getDN();
                String name = entry.getAttributeValue("name");
                String parentDn = extractParentDn(dn, baseDn);
                
                LdapOuNode node = new LdapOuNode(dn, name, parentDn);
                
                // Collect members (users or nested groups)
                if (entry.containsAttribute("member")) {
                    node.memberDns.addAll(entry.getAttributeValues("member"));
                }
                
                ouMap.put(dn, node);
                
                // Link child to parent
                if (parentDn != null && ouMap.containsKey(parentDn)) {
                    ouMap.get(parentDn).childDns.add(dn);
                }
            }
            logger.info("LDAP traversal complete. Mapped {} organizational units.", ouMap.size());
        }
    }

    private String extractParentDn(String dn, String baseDn) {
        if (dn.equals(baseDn)) return null;
        int idx = dn.indexOf(',');
        return idx > 0 ? dn.substring(idx + 1) : null;
    }

    public Map<String, LdapOuNode> getOuMap() {
        return Collections.unmodifiableMap(ouMap);
    }
}

Step 2: Resolving Circular Dependencies and Flattening Hierarchy

Active Directory structures occasionally contain reference loops or deeply nested chains that violate Genesys Cloud SCIM constraints. This step performs a depth-first search, detects back-edges, and flattens the hierarchy by attaching circular nodes to the nearest valid ancestor. The maximum nesting depth is capped at three levels.

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.*;

public class HierarchyFlattener {
    private static final Logger logger = LoggerFactory.getLogger(HierarchyFlattener.class);
    private static final int MAX_DEPTH = 3;

    public static List<LdapHierarchyMapper.LdapOuNode> flattenHierarchy(Map<String, LdapHierarchyMapper.LdapOuNode> ouMap) {
        List<LdapHierarchyMapper.LdapOuNode> flattened = new ArrayList<>();
        Set<String> visited = new HashSet<>();
        Deque<String> recursionStack = new ArrayDeque<>();
        
        // Find root nodes (those whose parent is not in the map)
        List<String> roots = ouMap.values().stream()
            .filter(n -> n.parentDn == null || !ouMap.containsKey(n.parentDn))
            .map(n -> n.dn)
            .toList();

        for (String rootDn : roots) {
            flattenRecursive(ouMap, rootDn, visited, recursionStack, flattened, 0);
        }
        
        logger.info("Hierarchy flattened. Resolved {} nodes with max depth {}.", flattened.size(), MAX_DEPTH);
        return flattened;
    }

    private static void flattenRecursive(Map<String, LdapHierarchyMapper.LdapOuNode> ouMap,
                                         String currentDn,
                                         Set<String> visited,
                                         Deque<String> recursionStack,
                                         List<LdapHierarchyMapper.LdapOuNode> flattened,
                                         int depth) {
        if (visited.contains(currentDn) || depth > MAX_DEPTH) {
            return;
        }
        
        visited.add(currentDn);
        recursionStack.push(currentDn);
        
        LdapHierarchyMapper.LdapOuNode node = ouMap.get(currentDn);
        if (node != null) {
            flattened.add(node);
        }
        
        for (String childDn : (node != null ? node.childDns : List.of())) {
            if (recursionStack.contains(childDn)) {
                // Circular dependency detected. Flatten by skipping back-edge.
                logger.warn("Circular dependency detected at {}. Flattening node.", childDn);
                continue;
            }
            flattenRecursive(ouMap, childDn, visited, recursionStack, flattened, depth + 1);
        }
        
        recursionStack.pop();
    }
}

Step 3: Constructing RFC 7643 POST Requests and Syncing to Genesys Cloud

Genesys Cloud SCIM expects RFC 7643 compliant JSON payloads. The members array requires value, displayName, and $ref fields. The client constructs these payloads, sends them to /scim/v2/Groups, and implements exponential backoff for 429 rate limit responses.

import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

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

    public ScimSyncClient(GenesysCloudAuthManager authManager, String baseUrl) {
        this.authManager = authManager;
        this.httpClient = HttpClient.newBuilder()
            .connectTimeout(java.time.Duration.ofSeconds(10))
            .build();
        this.baseUrl = baseUrl.endsWith("/") ? baseUrl : baseUrl + "/";
    }

    public void syncGroup(LdapHierarchyMapper.LdapOuNode node) throws Exception {
        String token = authManager.getAccessToken();
        
        // Construct RFC 7643 payload
        Map<String, Object> payload = Map.of(
            "schemas", List.of("urn:ietf:params:scim:schemas:core:2.0:Group"),
            "displayName", node.displayName,
            "members", buildMembersPayload(node.memberDns)
        );
        
        String jsonBody = mapper.writeValueAsString(payload);
        
        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create(baseUrl + "scim/v2/Groups"))
            .header("Authorization", "Bearer " + token)
            .header("Content-Type", "application/json")
            .header("Accept", "application/json")
            .POST(HttpRequest.BodyPublishers.ofString(jsonBody))
            .build();

        HttpResponse<String> response = executeWithRetry(request, 3);
        
        if (response.statusCode() == 201) {
            logger.info("Group synced successfully: {}", node.displayName);
        } else if (response.statusCode() == 409) {
            logger.info("Group already exists. Skipping: {}", node.displayName);
        } else {
            throw new RuntimeException("SCIM sync failed with status " + response.statusCode() + ": " + response.body());
        }
    }

    private List<Map<String, String>> buildMembersPayload(List<String> memberDns) {
        return memberDns.stream().map(dn -> Map.of(
            "value", dn,
            "displayName", dn,
            "$ref", dn
        )).toList();
    }

    private HttpResponse<String> executeWithRetry(HttpRequest request, int maxRetries) throws Exception {
        Exception lastException = null;
        for (int attempt = 0; attempt <= maxRetries; attempt++) {
            HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
            
            if (response.statusCode() == 429) {
                if (attempt == maxRetries) {
                    throw new RuntimeException("Rate limit exceeded after " + maxRetries + " retries.");
                }
                long waitTime = (long) Math.pow(2, attempt) * 1000;
                logger.warn("Received 429. Retrying in {} ms.", waitTime);
                TimeUnit.MILLISECONDS.sleep(waitTime);
                continue;
            }
            
            lastException = null;
            return response;
        }
        throw lastException != null ? lastException : new RuntimeException("Unexpected retry failure");
    }
}

Step 4: Verifying Sync Completeness via Member Count Comparison

After synchronization, the client queries Genesys Cloud SCIM to verify that member counts match the source directory. The verification handles pagination and logs discrepancies for downstream reconciliation.

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

public class ScimVerificationClient {
    private static final Logger logger = LoggerFactory.getLogger(ScimVerificationClient.class);
    private final GenesysCloudAuthManager authManager;
    private final HttpClient httpClient;
    private final String baseUrl;

    public ScimVerificationClient(GenesysCloudAuthManager authManager, String baseUrl) {
        this.authManager = authManager;
        this.httpClient = HttpClient.newBuilder().build();
        this.baseUrl = baseUrl.endsWith("/") ? baseUrl : baseUrl + "/";
    }

    public boolean verifyGroupSync(String groupDisplayName, int expectedMemberCount) throws Exception {
        String token = authManager.getAccessToken();
        String encodedName = java.net.URLEncoder.encode(groupDisplayName, java.nio.charset.StandardCharsets.UTF_8);
        String uri = baseUrl + "scim/v2/Groups?filter=displayName+eq+" + encodedName + "&count=100";
        
        List<String> allMembers = new ArrayList<>();
        String nextUrl = uri;
        int startIndex = 1;

        while (nextUrl != null) {
            HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(nextUrl))
                .header("Authorization", "Bearer " + token)
                .header("Accept", "application/json")
                .GET()
                .build();

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

            // Parse JSON response using Jackson
            var root = new com.fasterxml.jackson.databind.ObjectMapper().readTree(response.body());
            
            if (root.has("Resources")) {
                var resources = root.get("Resources");
                for (var resource : resources) {
                    if (resource.has("members")) {
                        var members = resource.get("members");
                        for (var member : members) {
                            allMembers.add(member.path("value").asText());
                        }
                    }
                }
            }

            // Handle pagination
            nextUrl = root.path("Schemas").isMissingNode() ? null : 
                (root.has("nextPage") ? root.get("nextPage").asText() : null);
            startIndex += 100;
            if (nextUrl != null) {
                nextUrl = nextUrl + "&startIndex=" + startIndex;
            }
        }

        boolean matches = allMembers.size() == expectedMemberCount;
        logger.info("Verification for {}: Expected {}, Actual {}. Status: {}", 
            groupDisplayName, expectedMemberCount, allMembers.size(), matches ? "PASS" : "FAIL");
        return matches;
    }
}

Complete Working Example

The following class orchestrates the full synchronization pipeline. Replace placeholder credentials and connection strings before execution.

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;

public class ScimGroupSyncOrchestrator {
    private static final Logger logger = LoggerFactory.getLogger(ScimGroupSyncOrchestrator.class);

    public static void main(String[] args) {
        try {
            // Configuration
            String environment = "mypurecloud.com";
            String clientId = "YOUR_CLIENT_ID";
            String clientSecret = "YOUR_CLIENT_SECRET";
            String baseUrl = "https://api." + environment + "/";
            
            String ldapHost = "ldap.yourdomain.com";
            int ldapPort = 636; // LDAPS
            String bindDn = "CN=svc-sync,OU=ServiceAccounts,DC=yourdomain,DC=com";
            String bindPassword = "YOUR_LDAP_PASSWORD";
            String baseDn = "DC=yourdomain,DC=com";

            // Initialize components
            GenesysCloudAuthManager authManager = new GenesysCloudAuthManager(environment, clientId, clientSecret);
            LdapHierarchyMapper ldapMapper = new LdapHierarchyMapper();
            ScimSyncClient syncClient = new ScimSyncClient(authManager, baseUrl);
            ScimVerificationClient verifyClient = new ScimVerificationClient(authManager, baseUrl);

            // Step 1: Traverse LDAP
            logger.info("Starting LDAP traversal...");
            ldapMapper.traverseAndMap(ldapHost, ldapPort, bindDn, bindPassword, baseDn);

            // Step 2: Flatten hierarchy
            logger.info("Resolving circular dependencies and flattening hierarchy...");
            List<LdapHierarchyMapper.LdapOuNode> flatHierarchy = HierarchyFlattener.flattenHierarchy(ldapMapper.getOuMap());

            // Step 3 & 4: Sync and Verify
            for (LdapHierarchyMapper.LdapOuNode node : flatHierarchy) {
                logger.info("Processing group: {}", node.displayName);
                syncClient.syncGroup(node);
                
                // Verify immediately after sync
                boolean verified = verifyClient.verifyGroupSync(node.displayName, node.memberDns.size());
                if (!verified) {
                    logger.error("Sync verification failed for {}. Manual review required.", node.displayName);
                }
            }

            logger.info("Synchronization pipeline completed.");
        } catch (Exception e) {
            logger.error("Pipeline failed with error", e);
            System.exit(1);
        }
    }
}

Common Errors and Debugging

Error: 401 Unauthorized

• Cause: The OAuth token has expired, or the client credentials lack the scim:admin:write scope.
• Fix: Verify the confidential client configuration in the Genesys Cloud admin console. Ensure the GenesysCloudAuthManager refreshes tokens before the 30-second safety margin expires. Check SDK logs for scope validation failures.

Error: 403 Forbidden

• Cause: The OAuth client is missing SCIM permissions, or the calling service account lacks administrative privileges for identity management.
• Fix: Navigate to Organization Settings in Genesys Cloud. Assign the SCIM Administrator role to the service account associated with the OAuth client. Confirm that scim:admin:read and scim:admin:write are explicitly granted.

Error: 429 Too Many Requests

• Cause: The client exceeds Genesys Cloud rate limits during bulk group creation. SCIM endpoints enforce strict per-minute quotas.
• Fix: The executeWithRetry method implements exponential backoff. Increase the initial delay or add a fixed rate limiter using java.util.concurrent.Semaphore if processing thousands of groups. Reduce batch concurrency to one thread per tenant.

Error: 409 Conflict or Circular Dependency Warning

• Cause: The LDAP traversal encountered a reference loop, or the group already exists in Genesys Cloud with a different member set.
• Fix: The HierarchyFlattener class breaks back-edges automatically. If 409 persists, enable upsert logic by switching the HTTP method to PATCH with the group ID returned in the Location header. Validate LDAP OU naming conventions to prevent duplicate displayName collisions.

Error: 5xx Server Error

• Cause: Temporary Genesys Cloud platform degradation or payload size limits.
• Fix: Implement circuit breaker patterns using Resilience4j. Split large member arrays into chunks of 500 references. Retry with linear backoff capped at five attempts.

Official References

• Genesys Cloud SCIM API Documentation
• Genesys Cloud OAuth 2.0 Client Credentials Flow
• RFC 7643: SCIM Core Schema
• UnboundID LDAP SDK for Java
• Genesys Cloud Java SDK Reference