Update message metadata to use deliveryCount consistently

Replaced outdated `redeliveryCount` references with `deliveryCount` across tests and implementations for consistency. Deprecated `redeliveryCount` but maintained backward compatibility by mapping it to `deliveryCount`. Updated documentation and comments to reflect the changes accurately.

Author: aricart

examples/legacy_js/07_pullsub.ts

@@ -33,7 +33,7 @@ const psub = await js.pullSubscribe(subj, {
   for await (const m of psub) {
     console.log(
       `[${m.seq}] ${
-        m.redelivered ? `- redelivery ${m.info.redeliveryCount}` : ""
+        m.redelivered ? `- redelivery ${m.info.deliveryCount}` : ""
       }`,
     );
     if (m.seq % 2 === 0) {

jetstream/jsapi_types.ts

@@ -950,7 +950,7 @@ export interface ConsumerUpdateConfig {
    */
   "ack_wait"?: Nanos;
   /**
-   * The number of times a message will be redelivered to consumers if not acknowledged in time
+   * The maximum number of times a message will be delivered to consumers.
    */
   "max_deliver"?: number;
   /**
@@ -1083,7 +1083,11 @@ export interface DeliveryInfo {
    */
   consumer: string;
   /**
-   * The number of times the message has been redelivered.
+   * The number of times the message has been delivered.
+   */
+  deliveryCount: number;
+  /**
+   * @deprecated: use deliveryCount
    */
   redeliveryCount: number;
   /**

jetstream/jsmsg.ts

@@ -142,17 +142,18 @@ export function parseInfo(s: string): DeliveryInfo {
   }
 
   // old
-  // "$JS.ACK.<stream>.<consumer>.<redeliveryCount><streamSeq><deliverySequence>.<timestamp>.<pending>"
+  // "$JS.ACK.<stream>.<consumer>.<deliveryCount><streamSeq><deliverySequence>.<timestamp>.<pending>"
   // new
-  // $JS.ACK.<domain>.<accounthash>.<stream>.<consumer>.<redeliveryCount>.<streamSeq>.<deliverySequence>.<timestamp>.<pending>.<random>
+  // $JS.ACK.<domain>.<accounthash>.<stream>.<consumer>.<deliveryCount>.<streamSeq>.<deliverySequence>.<timestamp>.<pending>.<random>
   const di = {} as DeliveryInfo;
   // if domain is "_", replace with blank
   di.domain = tokens[2] === "_" ? "" : tokens[2];
   di.account_hash = tokens[3];
   di.stream = tokens[4];
   di.consumer = tokens[5];
-  di.redeliveryCount = parseInt(tokens[6], 10);
-  di.redelivered = di.redeliveryCount > 1;
+  di.deliveryCount = parseInt(tokens[6], 10);
+  di.redeliveryCount = di.deliveryCount;
+  di.redelivered = di.deliveryCount > 1;
   di.streamSequence = parseInt(tokens[7], 10);
   di.deliverySequence = parseInt(tokens[8], 10);
   di.timestampNanos = parseInt(tokens[9], 10);
@@ -196,7 +197,7 @@ export class JsMsgImpl implements JsMsg {
   }
 
   get redelivered(): boolean {
-    return this.info.redeliveryCount > 1;
+    return this.info.deliveryCount > 1;
   }
 
   get reply(): string {

jetstream/tests/fetch_test.ts

@@ -244,7 +244,7 @@ Deno.test("fetch - listener leaks", async () => {
     for await (const m of iter) {
       assertEquals(nci.protocol.listeners.length, base);
       m?.nak();
-      if (m.info.redeliveryCount > 100) {
+      if (m.info.deliveryCount > 100) {
         done = true;
       }
     }

jetstream/tests/jetstream_test.ts

@@ -1168,7 +1168,7 @@ Deno.test("jetstream - backoff", async () => {
         start = Date.now();
       }
       arrive.push(Date.now());
-      if (m.info.redeliveryCount === 4) {
+      if (m.info.deliveryCount === 4) {
         break;
       }
     }

jetstream/tests/jsmsg_test.ts

@@ -38,18 +38,18 @@ import { JetStreamManagerImpl } from "../jsm.ts";
 import { MsgImpl } from "../../nats-base-client/msg.ts";
 
 Deno.test("jsmsg - parse", () => {
-  // "$JS.ACK.<stream>.<consumer>.<redeliveryCount><streamSeq><deliverySequence>.<timestamp>.<pending>"
+  // "$JS.ACK.<stream>.<consumer>.<deliveryCount><streamSeq><deliverySequence>.<timestamp>.<pending>"
   const rs = `$JS.ACK.streamname.consumername.2.3.4.${nanos(Date.now())}.100`;
   const info = parseInfo(rs);
   assertEquals(info.stream, "streamname");
   assertEquals(info.consumer, "consumername");
-  assertEquals(info.redeliveryCount, 2);
+  assertEquals(info.deliveryCount, 2);
   assertEquals(info.streamSequence, 3);
   assertEquals(info.pending, 100);
 });
 
 Deno.test("jsmsg - parse long", () => {
-  // $JS.ACK.<domain>.<accounthash>.<stream>.<consumer>.<redeliveryCount>.<streamSeq>.<deliverySequence>.<timestamp>.<pending>.<random>
+  // $JS.ACK.<domain>.<accounthash>.<stream>.<consumer>.<deliveryCount>.<streamSeq>.<deliverySequence>.<timestamp>.<pending>.<random>
   const rs = `$JS.ACK.domain.account.streamname.consumername.2.3.4.${
     nanos(Date.now())
   }.100.rand`;
@@ -58,7 +58,7 @@ Deno.test("jsmsg - parse long", () => {
   assertEquals(info.account_hash, "account");
   assertEquals(info.stream, "streamname");
   assertEquals(info.consumer, "consumername");
-  assertEquals(info.redeliveryCount, 2);
+  assertEquals(info.deliveryCount, 2);
   assertEquals(info.streamSequence, 3);
   assertEquals(info.pending, 100);
 });
@@ -95,7 +95,7 @@ Deno.test("jsmsg - acks", async () => {
         fail(err.message);
       }
       msg.respond(Empty, {
-        // "$JS.ACK.<stream>.<consumer>.<redeliveryCount><streamSeq><deliverySequence>.<timestamp>.<pending>"
+        // "$JS.ACK.<stream>.<consumer>.<deliveryCount><streamSeq><deliverySequence>.<timestamp>.<pending>"
         reply:
           `MY.TEST.streamname.consumername.1.${counter}.${counter}.${Date.now()}.0`,
       });

jetstream/tests/next_test.ts

@@ -107,7 +107,7 @@ Deno.test("next - listener leaks", async () => {
     const m = await consumer.next();
     if (m) {
       m.nak();
-      if (m.info?.redeliveryCount > 100) {
+      if (m.info?.deliveryCount > 100) {
         break;
       }
     }