@splitsoftware/splitio-commons
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Split JavaScript SDK common components
69 lines (68 loc) • 2.78 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.NodeSignalListener = void 0;
var thenable_1 = require("../utils/promise/thenable");
var constants_1 = require("../logger/constants");
var SIGTERM = 'SIGTERM';
var EVENT_NAME = 'for SIGTERM signal.';
/**
* We'll listen for SIGTERM since it's the standard signal for server shutdown.
*
* If you're stopping the execution yourself via the keyboard, or by calling process.exit,
* you should call the cleanup logic yourself, since we cannot ensure the data is sent after
* the process is already exiting.
*/
var NodeSignalListener = /** @class */ (function () {
function NodeSignalListener(syncManager, // private handler: () => MaybeThenable<void>,
settings) {
// @TODO review handler logic when implementing Node.js SDK
this.handler = function () {
if (syncManager) {
// syncManager.stop();
return syncManager.flush();
}
};
this.settings = settings;
this._sigtermHandler = this._sigtermHandler.bind(this);
}
NodeSignalListener.prototype.start = function () {
this.settings.log.debug(constants_1.CLEANUP_REGISTERING, [EVENT_NAME]);
// eslint-disable-next-line no-undef
process.on(SIGTERM, this._sigtermHandler);
};
NodeSignalListener.prototype.stop = function () {
this.settings.log.debug(constants_1.CLEANUP_DEREGISTERING, [EVENT_NAME]);
// eslint-disable-next-line no-undef
process.removeListener(SIGTERM, this._sigtermHandler);
};
/**
* Call the handler, clean up listeners and emit the signal again.
*/
NodeSignalListener.prototype._sigtermHandler = function () {
var _this = this;
var wrapUp = function () {
// Cleaned up, remove handlers.
_this.stop();
// This handler prevented the default behavior, start again.
// eslint-disable-next-line no-undef
process.kill(process.pid, SIGTERM);
};
this.settings.log.debug(constants_1.LOG_PREFIX_CLEANUP + "Split SDK graceful shutdown after SIGTERM.");
var handlerResult = null;
try {
handlerResult = this.handler();
}
catch (err) {
this.settings.log.error(constants_1.LOG_PREFIX_CLEANUP + "Error with Split SDK graceful shutdown: " + err);
}
if ((0, thenable_1.thenable)(handlerResult)) {
// Always exit, even with errors. The promise is returned for UT purposes.
return handlerResult.then(wrapUp).catch(wrapUp);
}
else {
wrapUp();
}
};
return NodeSignalListener;
}());
exports.NodeSignalListener = NodeSignalListener;