node-opcua-server
Version:
pure nodejs OPCUA SDK - module server
55 lines • 2.6 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.ServerSidePublishEngineForOrphanSubscription = void 0;
/**
* @module node-opcua-server
*/
// tslint:disable:no-console
const chalk_1 = __importDefault(require("chalk"));
const node_opcua_debug_1 = require("node-opcua-debug");
const server_publish_engine_1 = require("./server_publish_engine");
const debugLog = (0, node_opcua_debug_1.make_debugLog)(__filename);
const doDebug = (0, node_opcua_debug_1.checkDebugFlag)(__filename);
/**
* the ServerSidePublishEngineForOrphanSubscription is keeping track of
* live subscription that have been detached from timed out session.
* It takes care of providing back those subscription to any session that
* will claim them again with transferSubscription service
* It also make sure that subscription are properly disposed when they expire.
*
* @internal
*/
class ServerSidePublishEngineForOrphanSubscription extends server_publish_engine_1.ServerSidePublishEngine {
constructor(options) {
super(options);
}
add_subscription(subscription) {
debugLog(chalk_1.default.bgCyan.yellow.bold(" adding live subscription with id="), subscription.id, " to orphan");
// detach subscription from old session
subscription.$session = undefined;
super.add_subscription(subscription);
// also add an event handler to detected when the subscription has ended
// so we can automatically remove it from the orphan table
subscription._expired_func = function () {
debugLog(chalk_1.default.bgCyan.yellow(" Removing expired subscription with id="), this.id, " from orphan");
// make sure all monitored item have been deleted
// Xx subscription.terminate();
// xx publish_engine.detach_subscription(subscription);
// Xx subscription.dispose();
};
subscription.once("expired", subscription._expired_func);
return subscription;
}
detach_subscription(subscription) {
// un set the event handler
super.detach_subscription(subscription);
subscription.removeListener("expired", subscription._expired_func);
subscription._expired_func = null;
return subscription;
}
}
exports.ServerSidePublishEngineForOrphanSubscription = ServerSidePublishEngineForOrphanSubscription;
//# sourceMappingURL=server_publish_engine_for_orphan_subscriptions.js.map