multi-host setup wotking with minor bugs

.gitignore

@@ -2,4 +2,5 @@ test/
 bitnami*
 node_modules
 package-lock.json
-firecracker*
+firecracker*
\ No newline at end of file
+secrets.json
\ No newline at end of file

dispatch_daemon/execute.js

@@ -17,7 +17,7 @@ function runIsolate(filename) {
                         console.log(result);
                         let timeDifference = Math.ceil((Date.now() - timeStart))
                         console.log("isolate time taken: ", timeDifference);
-                        resolve();
+                        resolve(result);
                     });
             }).catch(err => { reject(err) })
         });
@@ -29,9 +29,10 @@ function runProcess(filename) {
     return new Promise((resolve, reject) => {
         let timeStart = Date.now()
         const process = spawn('node', [filename]);
-
+        let result = "";
         process.stdout.on('data', (data) => {
             console.log(`stdout: ${data}`);
+            result += data;
             let timeDifference = Math.ceil((Date.now() - timeStart))
             console.log("process time taken: ", timeDifference);
         });
@@ -43,7 +44,7 @@ function runProcess(filename) {
 
         process.on('close', (code) => {
             console.log(`child process exited with code ${code}`);
-            resolve();
+            resolve(result);
         });
     })
 
@@ -56,11 +57,12 @@ function runContainer(imageName) {
     return new Promise((resolve, reject) => {
         let timeStart = Date.now()
         const process = spawn('docker', ["run", "--name", imageName, imageName]);
-
+        let result = "";
         process.stdout.on('data', (data) => {
             console.log(`stdout: ${data}`);
             let timeDifference = Math.ceil((Date.now() - timeStart))
             console.log("container run time taken: ", timeDifference);
+            result += data;
         });
 
         process.stderr.on('data', (data) => {
@@ -69,7 +71,7 @@ function runContainer(imageName) {
         });
 
         process.on('close', (code) => {
-            resolve(code);
+            resolve(result);
         })
     })
 

dispatch_daemon/index.js

@@ -17,24 +17,44 @@ client.on('message', function (topic, message) {
     // message is Buffer
     
     message = JSON.parse(message)
-    if (message.type !== 'heartbeat')
-        console.log(message.toString())
-    let runtime = message.runtime
-    let functionHash = message.functionHash
-
-    if (message.type === "execute") {
-        if (runtime === "isolate")
-            execute.runIsolate('../dispatcher/test/' + functionHash).then(() => client.publish(node_id, JSON.stringify({ status: "success" })))
-        else if (runtime === "process")
-            execute.runProcess('../dispatcher/test/' + functionHash).then(() => client.publish(node_id, JSON.stringify({ status: "success" })))
-        else if (runtime === "container")
-            execute.runContainer(functionHash).then(() => client.publish(node_id, JSON.stringify({ status: "success" })))
-        else {
-            client.publish(node_id, JSON.stringify({ status: "unknown runtime" }))
-            return
+    if (message.type !== 'heartbeat') {
+        let runtime = message.runtime
+        let functionHash = message.functionHash
+        let function_id = message.function_id
+        console.log("function_id", function_id);
+        
+        if (message.type === "execute") {
+            if (runtime === "isolate")
+                execute.runIsolate('../dispatcher/test/' + functionHash).then( result => {
+                    client.publish("response", JSON.stringify({ 
+                        status: "success",
+                        result,
+                        function_id
+                    }))
+                })
+            else if (runtime === "process")
+                execute.runProcess('../dispatcher/test/' + functionHash).then( result => {
+                    client.publish("response", JSON.stringify({
+                        status: "success",
+                        result,
+                        function_id
+                    }))
+                })
+            else if (runtime === "container")
+                execute.runContainer(functionHash).then(result => {
+                    client.publish("response", JSON.stringify({
+                        status: "success",
+                        result,
+                        function_id
+                    }))
+                })
+            else {
+                client.publish("response", JSON.stringify({ status: "unknown runtime" }))
+                return
+            }
         }
     }
-    
+        
 })
 
 function heartbeat() {

dispatcher/index.js

@@ -3,23 +3,29 @@
 const express = require('express')
 const bodyParser = require('body-parser')
 const fileUpload = require('express-fileupload');
+
 const fs = require('fs')
 const { spawn } = require('child_process');
-const redis = require('redis')
 const morgan = require('morgan')
 const mqtt = require('mqtt')
 const client = mqtt.connect('mqtt://localhost')
-const fs = require('fs')
-
 const app = express()
+const libSupport = require('./lib')
+
+// const secret = require('../secrets.json')
+// const db = require('nano')(`http://${secret.dispatched_db_username}:${secret.dispatched_db_password}@localhost:5984/dispatched`)
+let db = new Map()
 app.use(morgan('combined'))
 app.use(bodyParser.urlencoded({ extended: false }))
 app.use(bodyParser.json())
 app.use(fileUpload())
 const node_id = "20sez54hq8"
-
+const WINDOW_SIZE = 1
 const port = 8080
 
+let requestQueue = []
+
+
 app.post('/serverless/deploy', (req, res) => {
     
     let runtime = req.body.runtime
@@ -101,17 +107,49 @@ function deployContainer(path, imageName) {
 
 app.post('/serverless/execute/:id', (req, res) => {
 
-    let runtime = req.body.runtime
-    let functionHash = req.params.id
-    client.publish(node_id, JSON.stringify({
-        "type": "execute",
-        runtime, functionHash
-    }))
-    res.json({
-        "status": "success"
+    requestQueue.push({
+        req, res
     })
+
+    if (requestQueue.length >= WINDOW_SIZE)
+        dispatch()
 })
 
 
+function dispatch() {
+    for (let i = 0; i < WINDOW_SIZE; i++) {
+        let {req, res} = requestQueue.shift()
+        let runtime = req.body.runtime
+        let functionHash = req.params.id
+        let function_id = libSupport.makeid(20)
+        console.log("Dispatching function with Id", function_id);
+        
+        client.publish(node_id, JSON.stringify({
+            "type": "execute",
+            function_id,
+            runtime, functionHash
+        }))
+        db.set(function_id, res)
+        
+    }
+}
+
+
+client.on('message', function (topic, message) {
+
+    if (topic === "response") {
+        message = JSON.parse(message)
+        console.log(message);
+        let res = db.get(message.function_id)
+        res.json({
+            "status": "success",
+            "reply": message.result
+        })
+    }
+})
+
+app.listen(port, () => console.log(`Server listening on port ${port}!`))
 
-app.listen(port, () => console.log(`Server listening on port ${port}!`))
+client.on('connect', function () {
\ No newline at end of file
+    client.subscribe("response")
+})
\ No newline at end of file

dispatcher/package.json

@@ -15,6 +15,8 @@
     "express-fileupload": "^1.1.6",
     "isolated-vm": "^3.0.0",
     "morgan": "^1.9.1",
-    "redis": "^2.8.0"
+    "nano": "^8.1.0",
+    "redis": "^2.8.0",
+    "save": "^2.4.0"
   }
 }