feat: simplify router class structure

Author: adklempner

packages/interfaces/src/index.ts

@@ -18,3 +18,4 @@ export * from "./constants.js";
 export * from "./local_storage.js";
 export * from "./sharding.js";
 export * from "./health_status.js";
+export type { ShardInfo } from "./sharding.js";

packages/utils/src/common/sharding/routing_info.ts

@@ -20,14 +20,21 @@ import {
 export type RoutingInfo = AutoShardingRoutingInfo | StaticShardingRoutingInfo;
 
 export abstract class BaseRoutingInfo {
+  public pubsubTopic: PubsubTopic;
+  public shardId: ShardId;
+
   protected constructor(
     public networkConfig: NetworkConfig,
-    public pubsubTopic: PubsubTopic,
-    public shardId: ShardId
-  ) {}
+    pubsubTopic: PubsubTopic,
+    shardId: ShardId
+  ) {
+    this.pubsubTopic = pubsubTopic;
+    this.shardId = shardId;
+  }
 
-  public abstract get isAutoSharding(): boolean;
-  public abstract get isStaticSharding(): boolean;
+  public get clusterId(): ClusterId {
+    return this.networkConfig.clusterId;
+  }
 }
 
 export class AutoShardingRoutingInfo
@@ -61,24 +68,12 @@ export class AutoShardingRoutingInfo
    */
   private constructor(
     public networkConfig: AutoSharding,
-    public pubsubTopic: PubsubTopic,
-    public shardId: ShardId,
+    pubsubTopic: PubsubTopic,
+    shardId: ShardId,
     public contentTopic: string
   ) {
     super(networkConfig, pubsubTopic, shardId);
   }
-
-  public get clusterId(): number {
-    return this.networkConfig.clusterId;
-  }
-
-  public get isAutoSharding(): boolean {
-    return true;
-  }
-
-  public get isStaticSharding(): boolean {
-    return false;
-  }
 }
 
 export class StaticShardingRoutingInfo
@@ -127,35 +122,23 @@ export class StaticShardingRoutingInfo
    */
   private constructor(
     public networkConfig: StaticSharding,
-    public pubsubTopic: PubsubTopic,
-    public shardId: ShardId
+    pubsubTopic: PubsubTopic,
+    shardId: ShardId
   ) {
     super(networkConfig, pubsubTopic, shardId);
   }
-
-  public get clusterId(): ClusterId {
-    return this.networkConfig.clusterId;
-  }
-
-  public get isAutoSharding(): boolean {
-    return false;
-  }
-
-  public get isStaticSharding(): boolean {
-    return true;
-  }
 }
 
 export function isAutoShardingRoutingInfo(
   routingInfo: BaseRoutingInfo
 ): routingInfo is AutoShardingRoutingInfo {
-  return routingInfo.isAutoSharding;
+  return routingInfo instanceof AutoShardingRoutingInfo;
 }
 
 export function isStaticShardingRoutingInfo(
   routingInfo: BaseRoutingInfo
 ): routingInfo is StaticShardingRoutingInfo {
-  return routingInfo.isStaticSharding;
+  return routingInfo instanceof StaticShardingRoutingInfo;
 }
 
 export function createRoutingInfo(