Updated the files.

my-app/node_modules/log4js/lib/appenders/tcp-server.js

@@ -0,0 +1,49 @@
+const debug = require('debug')('log4js:tcp-server');
+const net = require('net');
+const clustering = require('../clustering');
+const LoggingEvent = require('../LoggingEvent');
+
+const DELIMITER = '__LOG4JS__';
+
+exports.configure = (config) => {
+  debug('configure called with ', config);
+
+  const server = net.createServer((socket) => {
+    let dataSoFar = '';
+    const send = (data) => {
+      if (data) {
+        dataSoFar += data;
+        if (dataSoFar.indexOf(DELIMITER)) {
+          const events = dataSoFar.split(DELIMITER);
+          if (!dataSoFar.endsWith(DELIMITER)) {
+            dataSoFar = events.pop();
+          } else {
+            dataSoFar = '';
+          }
+          events
+            .filter((e) => e.length)
+            .forEach((e) => {
+              clustering.send(LoggingEvent.deserialise(e));
+            });
+        } else {
+          dataSoFar = '';
+        }
+      }
+    };
+    socket.setEncoding('utf8');
+    socket.on('data', send);
+    socket.on('end', send);
+  });
+
+  server.listen(config.port || 5000, config.host || 'localhost', () => {
+    debug(`listening on ${config.host || 'localhost'}:${config.port || 5000}`);
+    server.unref();
+  });
+
+  return {
+    shutdown: (cb) => {
+      debug('shutdown called.');
+      server.close(cb);
+    },
+  };
+};