Importing Cognigy.AI Project Archives via REST API with Java
What You Will Build
A Java utility that uploads and imports Cognigy.AI project archives using atomic REST operations, enforces schema and dependency validation, manages version conflicts with overwrite directives, and tracks import telemetry for automated project governance. This tutorial uses the NICE Cognigy.AI REST API v2. The implementation uses Java 17 with the built-in java.net.http module.
Prerequisites
- Cognigy.AI API credentials with role-based access
- Required OAuth scopes:
project:write,import:execute,project:read - Cognigy.AI REST API v2
- Java 17+ runtime
- No external dependencies required (uses
java.net.http,java.nio,java.time,java.util)
Authentication Setup
Cognigy.AI uses a token-based authentication flow. The API expects a Bearer token in the Authorization header. The following code demonstrates a standard login exchange and implements a simple token cache with expiration tracking.
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.Map;
import java.util.concurrent.ConcurrentHashMap;
public class CognigyAuthManager {
private final HttpClient client;
private final String baseUrl;
private final String username;
private final String password;
private final Map<String, Object> tokenCache = new ConcurrentHashMap<>();
private static final long TOKEN_LIFETIME_SECONDS = 3500;
public CognigyAuthManager(String baseUrl, String username, String password) {
this.baseUrl = baseUrl.endsWith("/") ? baseUrl.substring(0, baseUrl.length() - 1) : baseUrl;
this.username = username;
this.password = password;
this.client = HttpClient.newBuilder()
.version(HttpClient.Version.HTTP_2)
.followRedirects(HttpClient.Redirect.NORMAL)
.build();
}
public String getBearerToken() throws Exception {
Instant now = Instant.now();
if (tokenCache.containsKey("expiresAt") &&
((Instant) tokenCache.get("expiresAt")).isAfter(now)) {
return (String) tokenCache.get("token");
}
String payload = String.format(
"{\"username\":\"%s\",\"password\":\"%s\"}", username, password);
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create(baseUrl + "/api/v2/auth/login"))
.header("Content-Type", "application/json")
.POST(HttpRequest.BodyPublishers.ofString(payload))
.build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
if (response.statusCode() != 200) {
throw new RuntimeException("Authentication failed with status " + response.statusCode() + ": " + response.body());
}
Map<String, Object> responseBody = parseJson(response.body());
String token = (String) responseBody.get("token");
tokenCache.put("token", token);
tokenCache.put("expiresAt", now.plusSeconds(TOKEN_LIFETIME_SECONDS));
return token;
}
private Map<String, Object> parseJson(String json) {
// Minimal JSON parsing for demonstration. In production, use Jackson or Gson.
return Map.of("token", extractTokenValue(json));
}
private String extractTokenValue(String json) {
int start = json.indexOf("\"token\":\"") + 9;
int end = json.indexOf("\"", start);
return json.substring(start, end);
}
}
Implementation
Step 1: Construct Import Payload & Validate Schema/Size
The Cognigy.AI import endpoint expects a structured JSON payload containing archive references, conflict resolution matrices, and validation directives. Before transmission, the client must validate the archive against project store constraints and maximum file size limits.
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Base64;
import java.util.HashMap;
import java.util.Map;
public class ImportPayloadBuilder {
private static final long MAX_ARCHIVE_SIZE_BYTES = 50 * 1024 * 1024; // 50MB limit
private static final String[] ALLOWED_EXTENSIONS = {".cognigy", ".zip"};
public static Map<String, Object> buildPayload(Path archivePath, String callbackUrl) throws IOException {
validateArchiveConstraints(archivePath);
byte[] archiveBytes = Files.readAllBytes(archivePath);
String base64Archive = Base64.getEncoder().encodeToString(archiveBytes);
String fileReference = "archive_" + System.currentTimeMillis() + "." +
archivePath.getFileName().toString().substring(archivePath.getFileName().toString().lastIndexOf('.') + 1);
Map<String, Object> conflictMatrix = new HashMap<>();
conflictMatrix.put("nodes", Map.of("dialogFlow_v2", "force_overwrite"));
conflictMatrix.put("entities", Map.of("customEntity_v1", "merge"));
conflictMatrix.put("intents", Map.of("fallbackIntent", "preserve"));
Map<String, Object> overwriteDirectives = new HashMap<>();
overwriteDirectives.put("allowDestructiveOverwrite", true);
overwriteDirectives.put("preserveTestCases", true);
overwriteDirectives.put("resetPublishedVersion", false);
Map<String, Object> payload = new HashMap<>();
payload.put("archiveReference", fileReference);
payload.put("archiveContent", base64Archive);
payload.put("versionConflictMatrix", conflictMatrix);
payload.put("overwriteDirectives", overwriteDirectives);
payload.put("validationPipelines", Map.of(
"schemaCompatibility", true,
"circularDependencyCheck", true,
"projectStoreConstraints", true
));
payload.put("graphRebuildTrigger", "automatic");
payload.put("callbackUrl", callbackUrl);
return payload;
}
private static void validateArchiveConstraints(Path archivePath) throws IOException {
String fileName = archivePath.getFileName().toString().toLowerCase();
boolean validExtension = false;
for (String ext : ALLOWED_EXTENSIONS) {
if (fileName.endsWith(ext)) {
validExtension = true;
break;
}
}
if (!validExtension) {
throw new IllegalArgumentException("Unsupported archive format. Allowed: " + String.join(", ", ALLOWED_EXTENSIONS));
}
long size = Files.size(archivePath);
if (size > MAX_ARCHIVE_SIZE_BYTES) {
throw new IllegalArgumentException("Archive exceeds maximum file size limit of 50MB. Current size: " + size + " bytes");
}
}
}
Step 2: Handle Atomic POST Execution & Graph Rebuild Trigger
The import operation must execute as an atomic POST request. The Cognigy.AI API processes the payload, extracts the archive, validates the structure, and triggers an automatic graph rebuild when the graphRebuildTrigger is set to automatic. The following code handles the HTTP transaction, manages latency tracking, and processes the job identifier returned by the server.
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.Map;
import java.util.concurrent.atomic.AtomicLong;
public class ImportExecutor {
private final HttpClient client;
private final String baseUrl;
private final AtomicLong totalLatencyMs = new AtomicLong(0);
private final AtomicLong successfulImports = new AtomicLong(0);
private final AtomicLong totalAttempts = new AtomicLong(0);
public ImportExecutor(String baseUrl) {
this.baseUrl = baseUrl.endsWith("/") ? baseUrl.substring(0, baseUrl.length() - 1) : baseUrl;
this.client = HttpClient.newBuilder()
.version(HttpClient.Version.HTTP_2)
.connectTimeout(java.time.Duration.ofSeconds(10))
.build();
}
public String executeImport(String bearerToken, Map<String, Object> payload) throws Exception {
totalAttempts.incrementAndGet();
Instant start = Instant.now();
String jsonPayload = toJson(payload);
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create(baseUrl + "/api/v2/projects/import"))
.header("Authorization", "Bearer " + bearerToken)
.header("Content-Type", "application/json")
.header("X-Request-ID", java.util.UUID.randomUUID().toString())
.POST(HttpRequest.BodyPublishers.ofString(jsonPayload))
.build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
Instant end = Instant.now();
long latency = java.time.Duration.between(start, end).toMillis();
totalLatencyMs.addAndGet(latency);
if (response.statusCode() == 202) {
successfulImports.incrementAndGet();
Map<String, Object> responsePayload = parseJson(response.body());
return (String) responsePayload.get("jobId");
} else {
throw new RuntimeException("Import failed with status " + response.statusCode() + ": " + response.body());
}
}
public double getSuccessRate() {
long attempts = totalAttempts.get();
return attempts == 0 ? 0.0 : (double) successfulImports.get() / attempts;
}
public long getAverageLatencyMs() {
long attempts = totalAttempts.get();
return attempts == 0 ? 0 : totalLatencyMs.get() / attempts;
}
private String toJson(Map<String, Object> map) {
// Minimal JSON serialization. Replace with Jackson/Gson in production.
StringBuilder sb = new StringBuilder("{");
boolean first = true;
for (Map.Entry<String, Object> entry : map.entrySet()) {
if (!first) sb.append(",");
sb.append("\"").append(entry.getKey()).append("\":");
sb.append(valueToJson(entry.getValue()));
first = false;
}
return sb.append("}").toString();
}
private String valueToJson(Object value) {
if (value instanceof String) return "\"" + value + "\"";
if (value instanceof Boolean) return value.toString();
if (value instanceof Map) return toJson((Map<String, Object>) value);
return String.valueOf(value);
}
private Map<String, Object> parseJson(String json) {
// Minimal parser for jobId extraction
int start = json.indexOf("\"jobId\":\"") + 9;
int end = json.indexOf("\"", start);
String jobId = json.substring(start, end);
return Map.of("jobId", jobId);
}
}
Step 3: Validation Logic & Circular Dependency Verification
Before transmitting the payload, the importer must verify the project structure to prevent import corruption during scaling operations. The following pipeline checks schema compatibility and detects circular dependencies in the dialogue graph using depth-first search.
import java.util.*;
public class ValidationPipeline {
public static void verifyProjectGraph(Map<String, List<String>> graphStructure) {
if (hasCircularDependency(graphStructure)) {
throw new IllegalStateException("Import rejected: Circular dependency detected in project graph");
}
validateSchemaCompatibility(graphStructure);
}
private static boolean hasCircularDependency(Map<String, List<String>> graph) {
Set<String> visited = new HashSet<>();
Set<String> recursionStack = new HashSet<>();
for (String node : graph.keySet()) {
if (!visited.contains(node)) {
if (dfsCycleCheck(node, graph, visited, recursionStack)) {
return true;
}
}
}
return false;
}
private static boolean dfsCycleCheck(String node, Map<String, List<String>> graph,
Set<String> visited, Set<String> recursionStack) {
visited.add(node);
recursionStack.add(node);
List<String> neighbors = graph.getOrDefault(node, Collections.emptyList());
for (String neighbor : neighbors) {
if (!visited.contains(neighbor)) {
if (dfsCycleCheck(neighbor, graph, visited, recursionStack)) {
return true;
}
} else if (recursionStack.contains(neighbor)) {
return true;
}
}
recursionStack.remove(node);
return false;
}
private static void validateSchemaCompatibility(Map<String, List<String>> graph) {
// Verify required root nodes exist
if (!graph.containsKey("START_NODE")) {
throw new IllegalArgumentException("Schema validation failed: Missing required START_NODE");
}
if (!graph.containsKey("END_NODE")) {
throw new IllegalArgumentException("Schema validation failed: Missing required END_NODE");
}
// Verify all referenced nodes are defined
Set<String> definedNodes = new HashSet<>(graph.keySet());
for (List<String> edges : graph.values()) {
for (String target : edges) {
if (!definedNodes.contains(target)) {
throw new IllegalArgumentException("Schema validation failed: Undefined node reference '" + target + "'");
}
}
}
}
}
Step 4: Callback Synchronization, Telemetry & Audit Logging
The final step synchronizes import events with external version control systems via HTTP callbacks, tracks latency and success rates, and generates structured audit logs for project governance.
import java.io.IOException;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.file.Files;
import java.nio.file.Path;
import java.time.Instant;
import java.time.format.DateTimeFormatter;
import java.util.Map;
public class ImportTelemetryManager {
private final HttpClient client;
private final Path auditLogDirectory;
public ImportTelemetryManager(Path auditLogDirectory) throws IOException {
this.client = HttpClient.newHttpClient();
this.auditLogDirectory = auditLogDirectory;
Files.createDirectories(auditLogDirectory);
}
public void dispatchCallback(String callbackUrl, String jobId, String status, double successRate, long avgLatencyMs) {
if (callbackUrl == null || callbackUrl.isEmpty()) return;
String callbackPayload = String.format(
"{\"jobId\":\"%s\",\"status\":\"%s\",\"successRate\":%.4f,\"averageLatencyMs\":%d,\"timestamp\":\"%s\"}",
jobId, status, successRate, avgLatencyMs, Instant.now().toString());
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create(callbackUrl))
.header("Content-Type", "application/json")
.header("X-Source", "CognigyProjectImporter")
.POST(HttpRequest.BodyPublishers.ofString(callbackPayload))
.build();
try {
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println("Callback dispatched to " + callbackUrl + " with status " + response.statusCode());
} catch (Exception e) {
System.err.println("Callback delivery failed: " + e.getMessage());
}
}
public void generateAuditLog(String jobId, String archiveReference, String status,
long latencyMs, String errorMessage) {
Map<String, Object> auditRecord = Map.of(
"timestamp", Instant.now().format(DateTimeFormatter.ISO_INSTANT),
"jobId", jobId,
"archiveReference", archiveReference,
"status", status,
"latencyMs", latencyMs,
"errorMessage", errorMessage != null ? errorMessage : "none"
);
String auditJson = toJson(auditRecord);
Path logFile = auditLogDirectory.resolve("import_audit_" +
Instant.now().format(DateTimeFormatter.ofPattern("yyyyMMdd_HHmmss")) + ".json");
try {
Files.writeString(logFile, auditJson);
System.out.println("Audit log written to " + logFile);
} catch (IOException e) {
System.err.println("Failed to write audit log: " + e.getMessage());
}
}
private String toJson(Map<String, Object> map) {
StringBuilder sb = new StringBuilder("{");
boolean first = true;
for (Map.Entry<String, Object> entry : map.entrySet()) {
if (!first) sb.append(",");
sb.append("\"").append(entry.getKey()).append("\":\"").append(entry.getValue()).append("\"");
first = false;
}
return sb.append("}").toString();
}
}
Complete Working Example
The following class orchestrates the authentication, validation, payload construction, execution, and telemetry steps into a single runnable module.
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Map;
public class CognigyProjectImporter {
public static void main(String[] args) {
String baseUrl = "https://api.cognigy.ai";
String username = "your_api_username";
String password = "your_api_password";
String callbackUrl = "https://vcs.internal/hooks/cognigy-import";
Path archivePath = Paths.get("/path/to/project_archive.cognigy");
Path auditDir = Paths.get("/var/log/cognigy-imports");
try {
CognigyAuthManager authManager = new CognigyAuthManager(baseUrl, username, password);
String bearerToken = authManager.getBearerToken();
// Simulated graph structure for validation
Map<String, java.util.List<String>> projectGraph = Map.of(
"START_NODE", java.util.List.of("GREETING_NODE"),
"GREETING_NODE", java.util.List.of("INTENT_ROUTER"),
"INTENT_ROUTER", java.util.List.of("END_NODE")
);
ValidationPipeline.verifyProjectGraph(projectGraph);
ImportPayloadBuilder payloadBuilder = new ImportPayloadBuilder();
Map<String, Object> payload = payloadBuilder.buildPayload(archivePath, callbackUrl);
ImportExecutor executor = new ImportExecutor(baseUrl);
String jobId = executor.executeImport(bearerToken, payload);
ImportTelemetryManager telemetry = new ImportTelemetryManager(auditDir);
long latency = executor.getAverageLatencyMs();
double successRate = executor.getSuccessRate();
telemetry.dispatchCallback(callbackUrl, jobId, "COMPLETED", successRate, latency);
telemetry.generateAuditLog(jobId, payload.get("archiveReference").toString(),
"COMPLETED", latency, null);
System.out.println("Import job submitted successfully. Job ID: " + jobId);
System.out.println("Average latency: " + latency + "ms | Success rate: " + successRate);
} catch (Exception e) {
System.err.println("Import process failed: " + e.getMessage());
e.printStackTrace();
}
}
}
Common Errors & Debugging
Error: 400 Bad Request
- What causes it: The JSON payload contains invalid keys, missing required fields, or the archive format fails server-side schema validation.
- How to fix it: Verify the
validationPipelinesobject matches the Cognigy.AI schema requirements. Ensure thearchiveContentfield contains a valid Base64 string. - Code showing the fix: Add explicit schema validation before transmission. Use the
ValidationPipelineclass to check graph structure and node references prior to payload construction.
Error: 401 Unauthorized / 403 Forbidden
- What causes it: The Bearer token has expired, or the API credentials lack the
project:writeorimport:executescopes. - How to fix it: Refresh the token using
CognigyAuthManager.getBearerToken(). Verify the user role in the Cognigy.AI admin console includes Project Administrator or Import Manager permissions. - Code showing the fix: The
CognigyAuthManagerimplements automatic token expiration tracking. If a 401 occurs, callgetBearerToken()again before retrying the import request.
Error: 409 Conflict
- What causes it: A version conflict exists between the archive and the target project store, and the
overwriteDirectivesdo not permit destructive updates. - How to fix it: Adjust the
versionConflictMatrixto specifyforce_overwriteormergefor conflicting nodes. SetallowDestructiveOverwritetotruein the overwrite directives when safe. - Code showing the fix: Modify the payload construction step to include explicit conflict resolution strategies for each component type.
Error: 413 Payload Too Large
- What causes it: The archive exceeds the Cognigy.AI project store maximum file size limit.
- How to fix it: Compress the project archive or split large entity/intent datasets into separate imports. The
ImportPayloadBuilderenforces a 50MB client-side limit to prevent this error. - Code showing the fix: The
validateArchiveConstraintsmethod throws anIllegalArgumentExceptionwhenFiles.size(archivePath) > MAX_ARCHIVE_SIZE_BYTES, allowing graceful handling before the HTTP call.
Error: 500 Internal Server Error
- What causes it: The archive extraction fails due to corruption, or the automatic graph rebuild trigger encounters a database lock.
- How to fix it: Verify the archive integrity using checksums before encoding. Implement exponential backoff retry logic for 5xx responses.
- Code showing the fix: Wrap the
executor.executeImport()call in a retry loop withThread.sleep()and jitter whenresponse.statusCode() >= 500.