streamlining isolates

adding infra for long running isolates, pushed port allocation to dispatcher. TODO: reduce datastructure redundancy

dispatch_module/dispatch_daemon/config.json

-{"id":"192.168.31.51","master_node":"10.129.6.5"}
\ No newline at end of file
+{"id":"10.130.150.246","master_node":"10.129.6.5"}
\ No newline at end of file

dispatch_module/dispatch_daemon/execute.js

@@ -29,7 +29,7 @@ function runIsolate(filename) {
 }
 
 function runProcess(local_repository, functionHash, port) {
-    let filename = local_repository + functionHash
+    let filename = local_repository + functionHash + ".js"
     return new Promise((resolve, reject) => {
         let timeStart = Date.now()
         const process = spawn('node', [filename, port]);

dispatch_module/dispatch_daemon/index.js

@@ -39,11 +39,11 @@ libSupport.makeTopic(node_id).then(() => {
             let runtime = message.runtime
             let functionHash = message.functionHash
             let function_id = message.function_id
-
+            let port = message.port
             if (message.type === "execute") {
                 console.log("function_id", function_id);
-                libSupport.download(host_url + "/repository/" + functionHash, local_repository + functionHash).then(() => {
-                    startWorker(local_repository, functionHash, function_id, producer, runtime)
+                libSupport.download(host_url + "/repository/" + functionHash + ".js", local_repository + functionHash).then(() => {
+                    startWorker(local_repository, functionHash, function_id, producer, runtime, port)
                 })
 
             }
@@ -53,11 +53,11 @@ libSupport.makeTopic(node_id).then(() => {
 })
     
 
-function startWorker(local_repository, functionHash,function_id, producer, runtime) {
-    let port = libSupport.getPort(usedPort)
+function startWorker(local_repository, functionHash,function_id, producer, runtime, port) {
     console.log("Using port", port, "for functionHash", functionHash);
     
     usedPort.set(port, functionHash)
+    fs.writeFileSync('./local_repository/config.json', JSON.stringify({port}));
     if (runtime === "isolate")
         execute.runIsolate(local_repository + functionHash).then(result => {
             producer.send([{

dispatch_module/dispatch_daemon/lib.js

@@ -76,25 +76,10 @@ function makeid(length) {
     return result;
 }
 
-function getPort(usedPort) {
-    let port = -1, ctr = 0
-    do {
-        min = Math.ceil(30000);
-        max = Math.floor(60000);
-        port = Math.floor(Math.random() * (max - min + 1)) + min;
-        ctr += 1;
-        if (ctr > 30000) {
-            port = -1
-            break
-        }
-    } while (usedPort.has(port))
-    return port
-}
-
 function returnPort(port, usedPort) {
     usedPort.delete((port))
 }
 
 module.exports = {
-    download, makeid, updateConfig, makeTopic, getPort, returnPort
+    download, makeid, updateConfig, makeTopic, returnPort
 }
\ No newline at end of file

dispatch_module/dispatch_daemon/worker_thread.js

+const { Worker, isMainThread, workerData } = require('worker_threads');
+function runService() {
+    return new Promise((resolve, reject) => {
+        if (isMainThread) {
+            const worker = new Worker('./local_repository/49ce6b6f383591cf86a667a118ff0d2c.js');
+            worker.on('message', resolve);
+            worker.on('error', reject);
+            worker.on('exit', (code) => {
+            if (code !== 0)
+                reject(new Error(`Worker stopped with exit code ${code}`));
+            console.log("worker exited");
+        
+      })
+        }
+      
+    })
+  }
+  
+  async function run() {
+    const result = await runService(
+
+    )
+    console.log(result);
+  }
+  
+  run().catch(err => console.error(err))
\ No newline at end of file

dispatch_module/dispatcher/index.js

@@ -12,7 +12,7 @@ const mqtt = require('mqtt')
 const app = express()
 const libSupport = require('./lib')
 
-let functionToPort = new Map()
+let functionToPort = new Map(), usedPort = new Map()
 
 let kafka = require('kafka-node'),
     Producer = kafka.Producer,
@@ -27,8 +27,8 @@ let kafka = require('kafka-node'),
         [
             { topic: 'response', partition: 0, offset: 0}, 
             { topic: 'heartbeat' }, 
-            {topic: "deployed"},
-            { topic: "removeWorker"}
+            { topic: "deployed" },
+            { topic: "removeWorker" }
         ],
         [
             { autoCommit: true }
@@ -99,7 +99,7 @@ function deployContainer(path, imageName) {
             RUN npm install
             COPY . /app
             
-            CMD node ${imageName}`
+            CMD node ${imageName}.js`
             , function (err) {
                 if (err) {
                     console.log("failed", err);
@@ -177,7 +177,8 @@ function dispatch() {
             messages: JSON.stringify({
                 "type": "execute",
                 function_id,
-                runtime, functionHash
+                runtime, functionHash,
+                port: libSupport.getPort(usedPort)
             }),
             partition: 0
         }]
@@ -221,7 +222,6 @@ consumer.on('message', function (message) {
         
         if (db.has(message.functionHash + message.runtime)) {
             let { req, res } = db.get(message.functionHash + message.runtime)
-            // res.redirect(307, `http://${forwardTo.node_id}:${forwardTo.port}/serverless/function/execute`);
             if (parseInt(message.port) != -1)
                 functionToPort.set(message.functionHash + message.runtime, {
                     port: parseInt(message.port),
@@ -236,8 +236,8 @@ consumer.on('message', function (message) {
         }
     } else if (topic == "removeWorker") {
         console.log("removing metadata", message);
-        
         message = JSON.parse(message)
+        usedPort.delete(message.port)
         functionToPort.delete(message.functionHash + message.runtime)
     }
 });

dispatch_module/dispatcher/lib.js

@@ -23,7 +23,7 @@ function makeid(length) {
    let hash = crypto.createHash('md5').update(output).digest("hex");
    console.log(hash);
    
-    fs.writeFileSync(functionPath + hash, output)
+    fs.writeFileSync(functionPath + hash + ".js", output)
     return hash
  }
 
@@ -52,6 +52,21 @@ function makeid(length) {
     })
  }
 
- module.exports.makeid = makeid;
- module.exports.generateExecutor = generateExecutor;
- module.exports.reverseProxy = reverseProxy;
\ No newline at end of file
+ function getPort(usedPort) {
+   let port = -1, ctr = 0
+   do {
+       min = Math.ceil(30000);
+       max = Math.floor(60000);
+       port = Math.floor(Math.random() * (max - min + 1)) + min;
+       ctr += 1;
+       if (ctr > 30000) {
+           port = -1
+           break
+       }
+   } while (usedPort.has(port))
+   return port
+}
+
+ module.exports = {
+    makeid, generateExecutor, reverseProxy, getPort
+ }
\ No newline at end of file

dispatch_module/dispatcher/repository/worker_env/env.js

@@ -2,9 +2,16 @@
 const express = require('express')
 const bodyParser = require('body-parser')
 const app = express()
+let port = 5000
+try {
+    const config = require('./config.json')
+    port = config.port
+} catch (e) {
+    port = 5000
+}
 app.use(bodyParser.urlencoded({ extended: true }))
 app.use(bodyParser.json())
-let port = (process.argv[2] != null)? parseInt(process.argv[2]): 5000, lastRequest = Date.now()
+let lastRequest = Date.now()
 app.post('/serverless/function/execute/', (req, res) => {
     let payload = req.body
     lastRequest = Date.now()