first commit

node_modules/node-ipc/example/clusterUnixSocket/cluster-client.js

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+const fs = require('fs');
+const ipc = require('../../node-ipc');
+
+const socketPath = '/tmp/ipc.sock';
+
+//loop forever so you can see the pid of the cluster sever change in the logs
+setInterval(
+  function() {
+    ipc.connectTo(
+      'world',
+      socketPath,
+      connecting
+     );
+  },
+  2000
+);
+
+function connecting(socket) {
+  ipc.of.world.on(
+    'connect',
+    function() {
+      ipc.of.world.emit(
+        'currentDate',
+        {
+             message: new Date().toISOString()
+        }
+      );
+      ipc.disconnect('world');
+    }
+  );
+}

node_modules/node-ipc/example/clusterUnixSocket/cluster-server.js

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+const fs = require('fs');
+const ipc=require('../../../node-ipc');
+const cpuCount = require('os').cpus().length;
+const cluster = require('cluster');
+const socketPath = '/tmp/ipc.sock';
+
+ipc.config.unlink = false;
+
+if (cluster.isMaster) {
+   if (fs.existsSync(socketPath)) {
+       fs.unlinkSync(socketPath);
+   }
+
+   for (let i = 0; i < cpuCount; i++) {
+       cluster.fork();
+   }
+}else{
+   ipc.serve(
+     socketPath,
+     function() {
+       ipc.server.on(
+         'currentDate',
+         function(data,socket) {
+           console.log(`pid ${process.pid} got: `, data);
+         }
+       );
+     }
+  );
+
+  ipc.server.start();
+  console.log(`pid ${process.pid} listening on ${socketPath}`);
+}