Add TypeScript declaration for LB strategy

Author: lutovich

test/types/v1/driver.test.ts

@@ -21,6 +21,7 @@ import Driver, {
   AuthToken,
   Config,
   EncryptionLevel,
+  LoadBalancingStrategy,
   READ,
   SessionMode,
   TrustStrategy,
@@ -54,6 +55,8 @@ const trustedCertificates: undefined | string[] = config.trustedCertificates;
 const knownHosts: undefined | string = config.knownHosts;
 const connectionPoolSize: undefined | number = config.connectionPoolSize;
 const maxTransactionRetryTime: undefined | number = config.maxTransactionRetryTime;
+const loadBalancingStrategy1: undefined | LoadBalancingStrategy = config.loadBalancingStrategy;
+const loadBalancingStrategy2: undefined | string = config.loadBalancingStrategy;
 
 const sessionMode: SessionMode = dummy;
 const sessionModeStr: string = sessionMode;

types/v1/driver.d.ts

@@ -36,13 +36,16 @@ declare type TrustStrategy =
   "TRUST_CUSTOM_CA_SIGNED_CERTIFICATES" |
   "TRUST_SYSTEM_CA_SIGNED_CERTIFICATES";
 
+declare type LoadBalancingStrategy = "least_connected" | "round_robin";
+
 declare interface Config {
   encrypted?: boolean | EncryptionLevel;
   trust?: TrustStrategy;
   trustedCertificates?: string[];
   knownHosts?: string;
   connectionPoolSize?: number;
   maxTransactionRetryTime?: number;
+  loadBalancingStrategy?: LoadBalancingStrategy;
 }
 
 declare type SessionMode = "READ" | "WRITE";
@@ -56,6 +59,6 @@ declare interface Driver {
   close(): void;
 }
 
-export {Driver, READ, WRITE, AuthToken, Config, EncryptionLevel, TrustStrategy, SessionMode}
+export {Driver, READ, WRITE, AuthToken, Config, EncryptionLevel, TrustStrategy, LoadBalancingStrategy, SessionMode}
 
 export default Driver;