Move locks to their own DB collection

lib/cwmp.ts

@@ -31,6 +31,7 @@ import {
   extractParams,
 } from "./common/expression/util";
 import * as cache from "./cache";
+import * as lock from "./lock";
 import * as localCache from "./cwmp/local-cache";
 import {
   clearTasks,
@@ -228,7 +229,7 @@ async function writeResponse(
     currentSessions.set(connection, sessionContext);
     if (now >= sessionContext.extendLock) {
       sessionContext.extendLock = now + 10000;
-      const lockToken = await cache.acquireLock(
+      const lockToken = await lock.acquireLock(
         `cwmp_session_${sessionContext.deviceId}`,
         sessionContext.timeout * 1000 + 15000,
         0,
@@ -842,7 +843,7 @@ async function endSession(sessionContext: SessionContext): Promise<void> {
   }
 
   await Promise.all(promises);
-  await cache.releaseLock(
+  await lock.releaseLock(
     `cwmp_session_${sessionContext.deviceId}`,
     sessionContext.sessionId
   );
@@ -1154,7 +1155,7 @@ async function processRequest(
     }
 
     sessionContext.extendLock = sessionContext.timestamp + 10000;
-    const lockToken = await cache.acquireLock(
+    const lockToken = await lock.acquireLock(
       `cwmp_session_${sessionContext.deviceId}`,
       sessionContext.timeout * 1000 + 15000,
       0,