Reconciling Genesys Cloud SCIM Users via Java API with Atomic PUT Operations and Conflict Resolution

What You Will Build

• A Java module that synchronizes external Identity Provider (IdP) user states with Genesys Cloud CX using the SCIM 2.0 API.
• Uses the official genesyscloud Java SDK and ScimApi client for atomic user updates.
• Covers Java 17 with Maven dependencies, rate-limit handling, and structured audit logging.

Prerequisites

• OAuth 2.0 Client Credentials flow with scim:users:write and scim:users:read scopes.
• Genesys Cloud Java SDK version 160.0.0 or higher.
• Java 17 runtime.
• External dependencies: com.mypurecloud.api.client:genesyscloud, org.slf4j:slf4j-simple, com.fasterxml.jackson.core:jackson-databind.

Authentication Setup

Genesys Cloud requires OAuth 2.0 Client Credentials for server-to-server SCIM operations. The SDK handles token caching and automatic refresh when configured correctly. You must register a public API integration in the Genesys Cloud Admin Console and assign the scim:users:write and scim:users:read scopes.

import com.mypurecloud.api.client.ApiClient;
import com.mypurecloud.api.client.auth.OAuth2ClientCredentialsProvider;
import com.mypurecloud.api.client.auth.OAuth2ClientCredentialsProvider.Configuration;

public class ScimAuthConfig {
    public static ApiClient createAuthenticatedClient(String region, String clientId, String clientSecret) throws Exception {
        Configuration oauthConfig = new Configuration.Builder(clientId, clientSecret)
                .setRegion(region)
                .setTokenEndpoint("https://api." + region + ".mypurecloud.com/oauth/token")
                .build();

        OAuth2ClientCredentialsProvider tokenProvider = new OAuth2ClientCredentialsProvider(oauthConfig);
        
        ApiClient client = new ApiClient.Builder()
                .setRegion(region)
                .setOAuth2ClientCredentialsProvider(tokenProvider)
                .build();

        // Force initial token fetch to validate credentials before reconciliation begins
        client.getOAuth2ClientCredentialsProvider().getAccessToken();
        return client;
    }
}

The OAuth2ClientCredentialsProvider caches the access token in memory and automatically requests a new token when the current one expires. This prevents unnecessary token refresh calls during batch operations.

Implementation

Step 1: Initialize the SCIM Client and Rate Limit Handler

The Genesys Cloud SCIM API enforces strict rate limits. A production reconciler must track X-RateLimit-Remaining headers and implement exponential backoff for 429 Too Many Requests responses. The following configuration sets up the ScimApi client with a custom retry policy.

import com.mypurecloud.api.client.ApiException;
import com.mypurecloud.api.client.ScimApi;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ScimClientWrapper {
    private static final Logger log = LoggerFactory.getLogger(ScimClientWrapper.class);
    private final ScimApi scimApi;
    private static final int MAX_RETRIES = 3;
    private static final long INITIAL_BACKOFF_MS = 1000;

    public ScimClientWrapper(ApiClient apiClient) {
        this.scimApi = new ScimApi(apiClient);
    }

    public <T> T executeWithRetry(java.util.function.Supplier<T> apiCall) throws Exception {
        Exception lastException = null;
        for (int attempt = 0; attempt <= MAX_RETRIES; attempt++) {
            try {
                return apiCall.get();
            } catch (ApiException e) {
                lastException = e;
                if (e.getCode() == 429) {
                    long backoff = INITIAL_BACKOFF_MS * (1L << attempt);
                    log.warn("Rate limit exceeded. Retrying in {} ms. Attempt {}/{}", backoff, attempt + 1, MAX_RETRIES);
                    Thread.sleep(backoff);
                } else {
                    throw e;
                }
            }
        }
        throw lastException;
    }

    public ScimApi getScimApi() {
        return scimApi;
    }
}

Step 2: Construct Reconcile Payloads with Status Matrices and Conflict Directives

SCIM PUT operations replace the entire resource. You must construct a complete ScimUser object that matches RFC 7643 constraints. The following class maps IdP status values to Genesys Cloud activation states and applies conflict resolution directives.

import com.mypurecloud.api.client.model.*;
import java.time.Instant;
import java.util.List;
import java.util.regex.Pattern;

public enum ConflictDirective {
    OVERWRITE, SKIP, LOCK_AND_ALERT
}

public record IdpUserRecord(
    String externalId,
    String username,
    String email,
    String firstName,
    String lastName,
    String idpStatus,
    ConflictDirective directive
) {}

public class ScimPayloadBuilder {
    private static final Pattern EMAIL_PATTERN = Pattern.compile("^[A-Za-z0-9+_.-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}$");
    private static final Pattern EXTERNAL_ID_PATTERN = Pattern.compile("^[A-Za-z0-9_-]{3,64}$");

    public ScimUser buildPayload(IdpUserRecord idpUser, String existingScimId) {
        if (!EXTERNAL_ID_PATTERN.matcher(idpUser.externalId()).matches()) {
            throw new IllegalArgumentException("Invalid externalId format: " + idpUser.externalId());
        }
        if (!EMAIL_PATTERN.matcher(idpUser.email()).matches()) {
            throw new IllegalArgumentException("Invalid email format: " + idpUser.email());
        }

        ScimUser user = new ScimUser();
        user.schemas(List.of("urn:ietf:params:scim:schemas:core:2.0:User"));
        user.externalId(idpUser.externalId());
        user.userName(idpUser.username());
        user.displayName(idpUser.firstName() + " " + idpUser.lastName());
        
        ScimUserName name = new ScimUserName();
        name.givenName(idpUser.firstName());
        name.familyName(idpUser.lastName());
        user.name(name);

        ScimUserEmail email = new ScimUserEmail();
        email.value(idpUser.email());
        email.primary(true);
        user.emails(List.of(email));

        // Status synchronization matrix
        switch (idpUser.idpStatus().toUpperCase()) {
            case "ACTIVE":
                user.active(true);
                user.status("active");
                break;
            case "TERMINATED":
                user.active(false);
                user.status("deactivated");
                break;
            case "LOCKED":
                user.active(false);
                user.status("locked");
                break;
            default:
                throw new IllegalArgumentException("Unsupported IdP status: " + idpUser.idpStatus());
        }

        user.meta(new ScimResourceMeta()
                .resourceType("User")
                .location("/api/v2/scim/users/" + existingScimId)
                .lastModified(Instant.now()));

        return user;
    }
}

Step 3: Execute Atomic PUT Operations with Duplicate Detection and Lock Triggers

The PUT /api/v2/scim/users/{userId} endpoint requires a valid userId and replaces the entire object. You must fetch the existing user first to verify identity alignment and prevent orphaned accounts. The following code demonstrates duplicate detection, atomic replacement, and full HTTP cycle visibility.

HTTP Request Cycle:

PUT /api/v2/scim/users/a1b2c3d4-e5f6-7890-abcd-ef1234567890 HTTP/1.1
Host: api.usw2.pure.cloud
Authorization: Bearer eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9...
Content-Type: application/scim+json
Accept: application/json

{
  "schemas": ["urn:ietf:params:scim:schemas:core:2.0:User"],
  "externalId": "HRIS-998877",
  "userName": "jdoe@company.com",
  "active": true,
  "status": "active",
  "name": { "givenName": "Jane", "familyName": "Doe" },
  "emails": [{ "value": "jdoe@company.com", "primary": true }],
  "meta": {
    "resourceType": "User",
    "location": "/api/v2/scim/users/a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    "lastModified": "2024-01-15T10:30:00Z"
  }
}

HTTP Response Cycle:

HTTP/1.1 200 OK
Content-Type: application/json
X-RateLimit-Limit: 120
X-RateLimit-Remaining: 115
X-RateLimit-Reset: 1705312200

{
  "schemas": ["urn:ietf:params:scim:schemas:core:2.0:User"],
  "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "externalId": "HRIS-998877",
  "userName": "jdoe@company.com",
  "active": true,
  "status": "active",
  "name": { "givenName": "Jane", "familyName": "Doe" },
  "emails": [{ "value": "jdoe@company.com", "primary": true, "type": "work" }],
  "meta": {
    "created": "2023-05-10T08:00:00Z",
    "lastModified": "2024-01-15T10:30:00Z",
    "location": "/api/v2/scim/users/a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    "resourceType": "User"
  }
}

import com.mypurecloud.api.client.model.ScimUser;
import com.mypurecloud.api.client.model.ScimUserSearchResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.time.Instant;

public class ScimReconciler {
    private static final Logger log = LoggerFactory.getLogger(ScimReconciler.class);
    private final ScimClientWrapper client;
    private final ScimPayloadBuilder builder;

    public ScimReconciler(ScimClientWrapper client) {
        this.client = client;
        this.builder = new ScimPayloadBuilder();
    }

    public void reconcileUser(IdpUserRecord idpUser, String existingScimUserId) throws Exception {
        Instant start = Instant.now();
        try {
            // Fetch existing user to verify identity alignment
            ScimUser existing = client.executeWithRetry(() -> 
                client.getScimApi().getScimUser(existingScimUserId)
            );

            // Duplicate detection: verify externalId matches
            if (!existing.getExternalId().equals(idpUser.externalId())) {
                log.warn("Identity mismatch for SCIM user {}. Skipping update.", existingScimUserId);
                return;
            }

            ScimUser payload = builder.buildPayload(idpUser, existingScimUserId);
            
            // Atomic PUT replaces the entire resource
            client.executeWithRetry(() -> 
                client.getScimApi().putScimUser(existingScimUserId, payload)
            );

            log.info("Successfully reconciled user {} in {} ms", existingScimUserId, 
                java.time.Duration.between(start, Instant.now()).toMillis());
        } catch (Exception e) {
            log.error("Reconciliation failed for user {}: {}", existingScimUserId, e.getMessage());
            throw e;
        }
    }
}

Step 4: Track Latency, Generate Audit Logs, and Dispatch HRIS Webhooks

Production reconcilers must emit structured audit logs and notify external HRIS systems upon batch completion. The following dispatcher uses java.net.http.HttpClient to push reconciliation events to a configured webhook endpoint.

import com.fasterxml.jackson.databind.ObjectMapper;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class ReconciliationAuditor {
    private final HttpClient httpClient;
    private final String hriseWebhookUrl;
    private final ObjectMapper mapper = new ObjectMapper();
    private final Map<String, Integer> metrics = new ConcurrentHashMap<>();

    public ReconciliationAuditor(String hriseWebhookUrl) {
        this.hriseWebhookUrl = hriseWebhookUrl;
        this.httpClient = HttpClient.newBuilder()
                .version(java.net.http.HttpClient.Version.HTTP_2)
                .build();
    }

    public void logAndNotify(String userId, String operation, long latencyMs, boolean success, String error) throws Exception {
        metrics.merge(success ? "success" : "failure", 1, Integer::sum);
        
        Map<String, Object> auditPayload = Map.of(
            "userId", userId,
            "operation", operation,
            "latencyMs", latencyMs,
            "success", success,
            "error", error,
            "timestamp", Instant.now().toString()
        );

        String jsonPayload = mapper.writeValueAsString(auditPayload);
        
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(hriseWebhookUrl))
                .header("Content-Type", "application/json")
                .POST(HttpRequest.BodyPublishers.ofString(jsonPayload))
                .build();

        HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
        if (response.statusCode() >= 200 && response.statusCode() < 300) {
            log.info("HRIS webhook acknowledged for user {}", userId);
        } else {
            log.warn("HRIS webhook failed with status {} for user {}", response.statusCode(), userId);
        }
    }

    public Map<String, Integer> getMetrics() {
        return Map.copyOf(metrics);
    }
}

Complete Working Example

The following module integrates all components into a single automated reconciler. It processes IdP records in controlled batches of 50 to respect Genesys Cloud API limits, applies conflict resolution directives, and emits audit telemetry.

import com.mypurecloud.api.client.ApiClient;
import com.mypurecloud.api.client.model.ScimUser;
import com.mypurecloud.api.client.model.ScimUserSearchResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;
import java.util.ArrayList;
import java.util.Map;

public class AutomatedScimReconciler {
    private static final Logger log = LoggerFactory.getLogger(AutomatedScimReconciler.class);
    private static final int BATCH_SIZE = 50;
    private final ScimClientWrapper client;
    private final ScimReconciler reconciler;
    private final ReconciliationAuditor auditor;

    public AutomatedScimReconciler(ApiClient apiClient, String hriseWebhookUrl) {
        this.client = new ScimClientWrapper(apiClient);
        this.reconciler = new ScimReconciler(client);
        this.auditor = new ReconciliationAuditor(hriseWebhookUrl);
    }

    public void runReconciliation(List<IdpUserRecord> idpUsers) throws Exception {
        if (idpUsers.isEmpty()) return;

        // Split into batches to prevent rate limit exhaustion
        for (int i = 0; i < idpUsers.size(); i += BATCH_SIZE) {
            List<IdpUserRecord> batch = idpUsers.subList(i, Math.min(i + BATCH_SIZE, idpUsers.size()));
            processBatch(batch);
            if (i + BATCH_SIZE < idpUsers.size()) {
                Thread.sleep(2000); // Cooldown between batches
            }
        }

        log.info("Reconciliation complete. Final metrics: {}", auditor.getMetrics());
    }

    private void processBatch(List<IdpUserRecord> batch) throws Exception {
        for (IdpUserRecord idpUser : batch) {
            Instant start = Instant.now();
            boolean success = false;
            String error = null;
            String targetUserId = null;

            try {
                // Search existing user by externalId to align identity
                ScimUserSearchResponse search = client.executeWithRetry(() ->
                    client.getScimApi().searchScimUser(
                        "externalId eq \"" + idpUser.externalId() + "\"",
                        null, null, null, null, null, null, null, null, null, null
                    )
                );

                if (search.getTotalResults() == 0) {
                    log.info("User {} not found. Skipping reconciliation.", idpUser.externalId());
                    continue;
                }

                ScimUser existing = search.getResources().get(0);
                targetUserId = existing.getId();

                // Apply conflict directive
                if (idpUser.directive() == ConflictDirective.SKIP) {
                    log.debug("Skipping user {} per directive.", targetUserId);
                    continue;
                }

                reconciler.reconcileUser(idpUser, targetUserId);
                success = true;
            } catch (Exception e) {
                error = e.getMessage();
                if (idpUser.directive() == ConflictDirective.LOCK_AND_ALERT) {
                    log.warn("Locking user {} due to reconciliation failure: {}", targetUserId, error);
                    // Implement lock trigger logic here if required by your IdP
                }
            } finally {
                long latency = java.time.Duration.between(start, Instant.now()).toMillis();
                try {
                    auditor.logAndNotify(targetUserId != null ? targetUserId : idpUser.externalId(), 
                        "RECONCILE", latency, success, error);
                } catch (Exception auditEx) {
                    log.error("Audit logging failed for user {}: {}", targetUserId, auditEx.getMessage());
                }
            }
        }
    }

    public static void main(String[] args) throws Exception {
        String region = System.getenv("GENESYS_REGION");
        String clientId = System.getenv("GENESYS_CLIENT_ID");
        String clientSecret = System.getenv("GENESYS_CLIENT_SECRET");
        String hriseWebhook = System.getenv("HRIS_WEBHOOK_URL");

        if (region == null || clientId == null || clientSecret == null) {
            throw new IllegalStateException("Missing required environment variables");
        }

        ApiClient apiClient = ScimAuthConfig.createAuthenticatedClient(region, clientId, clientSecret);
        AutomatedScimReconciler reconciler = new AutomatedScimReconciler(apiClient, hriseWebhook);

        List<IdpUserRecord> idpUsers = List.of(
            new IdpUserRecord("HRIS-1001", "alice@company.com", "alice@company.com", "Alice", "Smith", "ACTIVE", ConflictDirective.OVERWRITE),
            new IdpUserRecord("HRIS-1002", "bob@company.com", "bob@company.com", "Bob", "Jones", "LOCKED", ConflictDirective.LOCK_AND_ALERT)
        );

        reconciler.runReconciliation(idpUsers);
    }
}

Common Errors & Debugging

Error: 403 Forbidden

• What causes it: The OAuth token lacks the scim:users:write or scim:users:read scope. The API integration may also be restricted to specific IP addresses.
• How to fix it: Verify the integration scopes in the Genesys Cloud Admin Console under Platform > API Integrations. Ensure the client credentials grant matches the required scopes.
• Code showing the fix:

// Verify token scopes before execution
String token = client.getOAuth2ClientCredentialsProvider().getAccessToken();
// Decode JWT and validate "scope" claim contains "scim:users:write scim:users:read"

Error: 409 Conflict

• What causes it: Duplicate externalId or userName values across multiple SCIM users. Genesys Cloud enforces uniqueness on these fields.
• How to fix it: Implement the duplicate detection logic shown in Step 3. Use the searchScimUser endpoint to verify existing records before issuing PUT requests.
• Code showing the fix:

ScimUserSearchResponse search = client.executeWithRetry(() ->
    client.getScimApi().searchScimUser("userName eq \"" + idpUser.username() + "\"", null, null, null, null, null, null, null, null, null)
);
if (search.getTotalResults() > 1) {
    throw new IllegalStateException("Duplicate userName detected. Reconciliation aborted.");
}

Error: 429 Too Many Requests

• What causes it: Exceeding the Genesys Cloud API rate limit. The SCIM API typically allows 120 requests per minute per client.
• How to fix it: The executeWithRetry method in ScimClientWrapper implements exponential backoff. Ensure batch sizes do not exceed 50 records and add a 2-second cooldown between batches.
• Code showing the fix:

// Already implemented in ScimClientWrapper.executeWithRetry()
// Monitors 429 status and applies INITIAL_BACKOFF_MS * (1 << attempt) delay

Error: 400 Bad Request

• What causes it: Invalid SCIM schema structure, missing required fields (schemas, externalId, userName), or malformed JSON.
• How to fix it: Validate payloads against RFC 7643 constraints before transmission. Use the ScimPayloadBuilder to enforce format verification on externalId and emails.
• Code showing the fix:

// Validation occurs in ScimPayloadBuilder.buildPayload()
// Throws IllegalArgumentException if externalId or email fails regex pattern matching

Official References

• Genesys Cloud SCIM API Documentation
• Genesys Cloud Java SDK Reference
• RFC 7643: SCIM Core Schema
• RFC 7644: SCIM Protocol
• Genesys Cloud OAuth 2.0 Client Credentials Flow