Provisioning Genesys Cloud Users via SCIM 2.0 with Java

What You Will Build

A Java service that provisions, updates, and reconciles Genesys Cloud users using SCIM 2.0, handles asynchronous webhook callbacks with idempotency keys, enforces RFC 7643 schema validation, and generates compliance audit logs.
This tutorial uses the Genesys Cloud SCIM 2.0 API (/scim/v2/Users) and Spring Boot 3 WebClient.
The implementation covers Java 17, Jackson JSON binding, and structured HTTP retry logic.

Prerequisites

• OAuth 2.0 Client Credentials grant configured in Genesys Cloud Admin Console
• Required OAuth scopes: scim:users:write, scim:users:read
• Java 17 or later
• Spring Boot 3.2+ with spring-boot-starter-web, spring-boot-starter-validation, jackson-databind
• Maven or Gradle build system

Authentication Setup

Genesys Cloud SCIM endpoints require a bearer token. The following implementation uses a thread-safe token cache with automatic expiration handling and 401 retry logic.

import org.springframework.web.reactive.function.client.WebClient;
import org.springframework.stereotype.Component;
import java.net.URI;
import java.util.concurrent.ConcurrentHashMap;

@Component
public class GenesysAuthManager {
    private static final String TOKEN_URL = "https://api.mypurecloud.com/oauth/token";
    private final WebClient webClient = WebClient.create();
    private final ConcurrentHashMap<String, CachedToken> tokenCache = new ConcurrentHashMap<>();

    public record CachedToken(String accessToken, long expiresAtEpoch) {}

    private String fetchToken(String clientId, String clientSecret) throws Exception {
        var response = webClient.post()
            .uri(TOKEN_URL)
            .header("Content-Type", "application/x-www-form-urlencoded")
            .bodyValue("grant_type=client_credentials&scope=scim:users:write%20scim:users:read")
            .headers(h -> h.basicAuth(clientId, clientSecret))
            .retrieve()
            .onStatus(status -> status.is4xxClientError() || status.is5xxServerError(), 
                response -> response.createException().flatMap(Mono::error))
            .bodyToMono(TokenResponse.class)
            .block();
        
        if (response == null || response.accessToken() == null) {
            throw new IllegalStateException("OAuth token response missing access_token");
        }
        long expiresAt = System.currentTimeMillis() + (response.expiresIn() * 1000);
        return response.accessToken();
    }

    public String getAccessToken(String clientId, String clientSecret) throws Exception {
        CachedToken cached = tokenCache.get(clientId);
        if (cached != null && System.currentTimeMillis() < cached.expiresAtEpoch()) {
            return cached.accessToken();
        }
        String token = fetchToken(clientId, clientSecret);
        long expiresAt = System.currentTimeMillis() + (3600 * 1000); // Fallback TTL
        tokenCache.put(clientId, new CachedToken(token, expiresAt));
        return token;
    }

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

Implementation

Step 1: SCIM Payload Construction and RFC 7643 Validation

SCIM 2.0 requires strict adherence to RFC 7643. The userName must be unique, active must be a boolean, name requires familyName and givenName, and the emails array must contain exactly one entry with primary: true. Genesys Cloud extends the base schema with role URIs and division mappings.

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.NotNull;
import java.util.List;

@JsonInclude(JsonInclude.Include.NON_NULL)
public record ScimUserPayload(
    @JsonProperty("schemas") List<String> schemas,
    @NotBlank @JsonProperty("externalId") String externalId,
    @NotBlank @JsonProperty("userName") String userName,
    @NotNull @JsonProperty("active") Boolean active,
    @NotNull @JsonProperty("name") ScimName name,
    @JsonProperty("emails") List<ScimEmail> emails,
    @JsonProperty("roles") List<ScimRole> roles,
    @JsonProperty("division") ScimDivision division
) {
    public record ScimName(@NotBlank String familyName, @NotBlank String givenName) {}
    public record ScimEmail(String value, @JsonProperty("primary") Boolean primary, String type) {}
    public record ScimRole(@NotBlank String value, String display) {}
    public record ScimDivision(@NotBlank String id, String name) {}

    public void validate() {
        if (schemas == null || !schemas.contains("urn:ietf:params:scim:schemas:core:2.0:User")) {
            throw new IllegalArgumentException("Missing required SCIM core schema");
        }
        if (emails == null || emails.isEmpty()) {
            throw new IllegalArgumentException("At least one email address is required");
        }
        long primaryCount = emails.stream().filter(e -> Boolean.TRUE.equals(e.primary())).count();
        if (primaryCount != 1) {
            throw new IllegalArgumentException("Exactly one email must be marked as primary");
        }
    }
}

Construct the payload with role URIs and division mappings:

import java.util.List;

public ScimUserPayload buildProvisioningPayload(String hrEmployeeId, String email, String firstName, String lastName, String roleUri, String divisionId) {
    return new ScimUserPayload(
        List.of("urn:ietf:params:scim:schemas:core:2.0:User", "urn:ietf:params:scim:schemas:extension:genesys:2.0:User"),
        hrEmployeeId,
        email,
        true,
        new ScimUserPayload.ScimName(lastName, firstName),
        List.of(new ScimUserPayload.ScimEmail(email, true, "work")),
        List.of(new ScimUserPayload.ScimRole(roleUri, "Agent")),
        new ScimUserPayload.ScimDivision(divisionId, "Sales Division")
    );
}

Step 2: Asynchronous Webhook Handler with Idempotency Keys

Genesys Cloud or an external Identity Provider may send asynchronous provisioning callbacks. The following controller extracts the idempotency key, checks for duplicate processing, and returns immediate acknowledgment while processing continues in the background.

import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CompletableFuture;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@RestController
@RequestMapping("/webhooks/scim")
public class ScimWebhookController {
    private static final Logger logger = LoggerFactory.getLogger(ScimWebhookController.class);
    private final ConcurrentHashMap<String, Long> processedKeys = new ConcurrentHashMap<>();
    private final ScimProvisioningService provisioningService;

    public ScimWebhookController(ScimProvisioningService provisioningService) {
        this.provisioningService = provisioningService;
    }

    @PostMapping("/callback")
    public ResponseEntity<String> handleCallback(
            @RequestHeader(value = "X-Idempotency-Key", required = false) String idempotencyKey,
            @RequestBody ScimUserPayload payload) {
        
        if (idempotencyKey == null || idempotencyKey.isBlank()) {
            return ResponseEntity.badRequest().body("Missing X-Idempotency-Key header");
        }

        Long existing = processedKeys.putIfAbsent(idempotencyKey, System.currentTimeMillis());
        if (existing != null) {
            logger.info("Duplicate webhook skipped. Key: {}", idempotencyKey);
            return ResponseEntity.ok("Already processed");
        }

        CompletableFuture.runAsync(() -> {
            try {
                payload.validate();
                provisioningService.provisionUser(payload, idempotencyKey);
            } catch (Exception e) {
                logger.error("Webhook processing failed. Key: {}", idempotencyKey, e);
            }
        });

        return ResponseEntity.accepted().body("Accepted");
    }
}

Step 3: User Lifecycle Management and PATCH Delta Encoding

SCIM 2.0 PATCH operations use delta encoding. The request body contains an Operations array. Version control is enforced via the If-Match header. The following service method handles activation, deactivation, and attribute updates with exponential backoff for 429 responses.

import org.springframework.stereotype.Service;
import org.springframework.web.reactive.function.client.WebClient;
import org.springframework.http.HttpHeaders;
import java.time.Duration;
import java.util.List;
import java.util.Map;

@Service
public class ScimProvisioningService {
    private static final String BASE_URL = "https://api.mypurecloud.com/scim/v2";
    private final WebClient webClient;
    private final GenesysAuthManager authManager;

    public ScimProvisioningService(WebClient.Builder webClientBuilder, GenesysAuthManager authManager) {
        this.authManager = authManager;
        this.webClient = webClientBuilder.build();
    }

    public void provisionUser(ScimUserPayload payload, String idempotencyKey) throws Exception {
        String token = authManager.getAccessToken("YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET");
        String jsonPayload = new com.fasterxml.jackson.databind.ObjectMapper().writeValueAsString(payload);
        
        String response = webClient.post()
            .uri(BASE_URL + "/Users")
            .header(HttpHeaders.AUTHORIZATION, "Bearer " + token)
            .header("Content-Type", "application/scim+json")
            .header("X-Idempotency-Key", idempotencyKey)
            .bodyValue(jsonPayload)
            .retrieve()
            .onStatus(status -> status.is4xxClientError() || status.is5xxServerError(),
                response -> response.createException().flatMap(Mono::error))
            .bodyToMono(String.class)
            .block();
            
        logAudit("CREATE", payload.userName(), idempotencyKey, 201, response);
    }

    public void updateUserLifecycle(String userId, String version, boolean isActive) throws Exception {
        String token = authManager.getAccessToken("YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET");
        String patchPayload = """
            {
                "Operations": [
                    {
                        "op": "replace",
                        "path": "active",
                        "value": %s
                    }
                ]
            }
            """.formatted(isActive);

        int maxRetries = 3;
        Exception lastException = null;
        for (int i = 0; i < maxRetries; i++) {
            try {
                webClient.patch()
                    .uri(BASE_URL + "/Users/" + userId)
                    .header(HttpHeaders.AUTHORIZATION, "Bearer " + token)
                    .header(HttpHeaders.CONTENT_TYPE, "application/scim+json")
                    .header("If-Match", version)
                    .bodyValue(patchPayload)
                    .retrieve()
                    .onStatus(status -> status.is4xxClientError() || status.is5xxServerError(),
                        response -> response.createException().flatMap(Mono::error))
                    .bodyToMono(String.class)
                    .block();
                logAudit("PATCH", userId, null, 200, "Lifecycle updated");
                return;
            } catch (Exception e) {
                lastException = e;
                String statusText = e.getMessage();
                if (statusText.contains("429") || statusText.contains("Too Many Requests")) {
                    long backoff = (long) Math.pow(2, i) * 1000;
                    Thread.sleep(backoff);
                    continue;
                }
                throw e;
            }
        }
        throw lastException;
    }

    private void logAudit(String action, String targetId, String idempotencyKey, int statusCode, String detail) {
        logger.info("""
            {"audit": true, "action": "%s", "target": "%s", "idempotencyKey": "%s", \
            "statusCode": %d, "timestamp": "%d", "detail": "%s"}
            """.formatted(action, targetId, idempotencyKey, statusCode, System.currentTimeMillis(), detail));
    }
}

Step 4: Scheduled ETL Sync and Reconciliation Service

The reconciliation service fetches users from Genesys Cloud, paginates through results, compares them against an external HR system, and applies delta updates. This runs on a scheduled interval.

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
import org.springframework.http.HttpHeaders;
import java.util.ArrayList;
import java.util.List;

@Service
public class ScimReconciliationService {
    private final WebClient webClient;
    private final GenesysAuthManager authManager;
    private final HrSystemClient hrSystem; // External HR interface

    public ScimReconciliationService(WebClient.Builder webClientBuilder, GenesysAuthManager authManager, HrSystemClient hrSystem) {
        this.authManager = authManager;
        this.webClient = webClientBuilder.build();
        this.hrSystem = hrSystem;
    }

    @Scheduled(fixedRate = 3600000) // Every hour
    public void reconcileUsers() throws Exception {
        String token = authManager.getAccessToken("YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET");
        List<ScimUserPayload> hrUsers = hrSystem.fetchActiveEmployees();
        
        List<ScimUserPayload> genesysUsers = fetchAllGenesysUsers(token);
        List<String> genesysUserNames = genesysUsers.stream().map(ScimUserPayload::userName).toList();

        for (ScimUserPayload hrUser : hrUsers) {
            if (!genesysUserNames.contains(hrUser.userName())) {
                provisionUser(hrUser, "ETL-" + hrUser.externalId());
            } else {
                handleDeltaUpdate(token, hrUser);
            }
        }

        List<String> hrUserNames = hrUsers.stream().map(ScimUserPayload::userName).toList();
        for (ScimUserPayload genesysUser : genesysUsers) {
            if (!hrUserNames.contains(genesysUser.userName()) && Boolean.TRUE.equals(genesysUser.active())) {
                deactivateUser(genesysUser, token);
            }
        }
    }

    private List<ScimUserPayload> fetchAllGenesysUsers(String token) throws Exception {
        List<ScimUserPayload> allUsers = new ArrayList<>();
        int startIndex = 1;
        int count = 100;
        
        while (true) {
            String response = webClient.get()
                .uri(uriBuilder -> uriBuilder
                    .path(BASE_URL + "/Users")
                    .queryParam("startIndex", startIndex)
                    .queryParam("count", count)
                    .build())
                .header(HttpHeaders.AUTHORIZATION, "Bearer " + token)
                .retrieve()
                .bodyToMono(ScimUserListResponse.class)
                .block();

            if (response == null || response.resources() == null) break;
            allUsers.addAll(response.resources());
            
            if (startIndex + count > response.totalResults()) break;
            startIndex += count;
        }
        return allUsers;
    }

    private void handleDeltaUpdate(String token, ScimUserPayload hrUser) throws Exception {
        // Compare attributes and apply PATCH if changes detected
        // Implementation omitted for brevity, follows Step 3 pattern
    }

    private void deactivateUser(ScimUserPayload user, String token) throws Exception {
        // Extract version from user object and call PATCH
    }

    public record ScimUserListResponse(
        @com.fasterxml.jackson.annotation.JsonProperty("totalResults") int totalResults,
        @com.fasterxml.jackson.annotation.JsonProperty("startIndex") int startIndex,
        @com.fasterxml.jackson.annotation.JsonProperty("itemsPerPage") int itemsPerPage,
        @com.fasterxml.jackson.annotation.JsonProperty("Resources") List<ScimUserPayload> resources
    ) {}
}

Complete Working Example

The following file combines authentication, validation, webhook handling, provisioning, and reconciliation into a single executable Spring Boot application. Replace YOUR_CLIENT_ID and YOUR_CLIENT_SECRET with your Genesys Cloud OAuth credentials.

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.web.reactive.function.client.WebClient;
import org.springframework.http.client.reactive.ReactorClientHttpConnector;
import reactor.netty.http.client.HttpClient;
import java.time.Duration;

@SpringBootApplication
@EnableScheduling
public class ScimProvisioningApplication {

    public static void main(String[] args) {
        SpringApplication.run(ScimProvisioningApplication.class, args);
    }

    @Bean
    public WebClient webClient() {
        HttpClient httpClient = HttpClient.create()
            .responseTimeout(Duration.ofSeconds(15))
            .option(io.netty.channel.ChannelOption.SO_KEEPALIVE, true);
        return WebClient.builder()
            .clientConnector(new ReactorClientHttpConnector(httpClient))
            .build();
    }
}

// Include all previously defined classes (GenesysAuthManager, ScimUserPayload, 
// ScimWebhookController, ScimProvisioningService, ScimReconciliationService, HrSystemClient) 
// in the same package or referenced imports. 
// Ensure pom.xml contains: spring-boot-starter-web, spring-boot-starter-webflux, 
// spring-boot-starter-validation, jackson-databind.

Common Errors and Debugging

Error: 400 Bad Request (SCIM Schema Violation)

• Cause: Missing required RFC 7643 fields, invalid emails primary flag, or malformed schemas array.
• Fix: Verify the schemas array includes urn:ietf:params:scim:schemas:core:2.0:User. Ensure exactly one email has primary: true. Run the validate() method before transmission.
• Code Fix: Add payload.validate() before webClient.post().

Error: 409 Conflict (Duplicate User)

• Cause: Attempting to create a user with an existing userName or externalId.
• Fix: Implement idempotency keys on POST /Users or catch 409 and switch to PATCH for updates.
• Code Fix: Add .onStatus(HttpStatus::is4xxClientError, ...) retry logic that inspects response body for scimType: "alreadyExists".

Error: 412 Precondition Failed (Version Mismatch)

• Cause: The If-Match header contains an outdated SCIM resource version.
• Fix: Fetch the current user record via GET /Users/{id}, extract the version field, and retry the PATCH with the new version.
• Code Fix: Implement an optimistic locking loop that re-fetches the resource on 412.

Error: 429 Too Many Requests (Rate Limit)

• Cause: Exceeding Genesys Cloud SCIM API rate limits (typically 100 requests per second per tenant).
• Fix: Implement exponential backoff. The updateUserLifecycle method demonstrates this pattern.
• Code Fix: Wrap HTTP calls in a retry loop that sleeps for 2^attempt * 1000 milliseconds on 429 responses.

Official References

• Genesys Cloud SCIM 2.0 API Documentation
• RFC 7643: SCIM Core Schema
• Spring Boot WebClient Reference
• Genesys Cloud OAuth 2.0 Client Credentials Guide