Explicit function chain support

Support added for explicit function chains via a map file. 
Static map support added - map provided during deployment added
TODO: add support for dynamic maps during request

dispatch_system/dispatch_manager/explicit_chain_handler.js

@@ -23,14 +23,15 @@ router.post('/deploy', (req, res) => {
     let aliases = {}
     let deployHandles = []
     createDirectory(file_path).then(() => {
+        
         for (const [file_alias, file] of Object.entries(files)) {
-       if (file_alias === 'map') {
-                file.mv(file_path + 'map' + chain_id)
-                continue     
-            }
             let functionHash = file.md5
-            aliases[file_alias] = functionHash
-            deployHandles.push(deploy(file_path, functionHash, file))
+            if (file_alias === 'map') {
+                    file.mv(file_path + 'map' + chain_id + ".json")
+                    continue     
+            }
+            // aliases[file_alias] = functionHash
+            deployHandles.push(deploy(file_path, functionHash, file, aliases, file_alias))
         }
 
         console.log("aliases", aliases);
@@ -53,11 +54,12 @@ router.post('/deploy', (req, res) => {
    
 })
 
-async function deploy(file_path, functionHash, file) {
+async function deploy(file_path, functionHash, file, aliases, file_alias) {
     let runtime = "container", memory = 330
     try {
         await moveFile(file, file_path, functionHash)
         functionHash = libSupport.generateExecutor(file_path, functionHash)
+        aliases[file_alias] = functionHash
         /**
          * Adding meta caching via couchdb
          * This will create / update function related metadata like resource limits etc
@@ -101,12 +103,12 @@ async function deploy(file_path, functionHash, file) {
             try {
                 await deployContainer(file_path, functionHash)
                 console.log("called");
-                return Promise.resolve()
+                return Promise.resolve(functionHash)
             } catch(err) {
                 return Promise.reject(err)
             }
         } else {
-            return Promise.resolve()
+            return Promise.resolve(functionHash)
         }
     } catch (err) {
         logger.error(err)
@@ -181,6 +183,87 @@ async function deployContainer(path, imageName) {
     })
 }
 
+router.post('/execute/:id', (req, res) => {
+    let map, aliases
+    // if (req.body.map)
+    //     map = req.body.map
+    // else {
+    readMap(`./repository/map${req.params.id}.json`)
+    .then(data => {
+        map = data
+        readMap(`./repository/aliases${req.params.id}.json`)
+        .then(data => {
+            aliases = data
+            let payload = JSON.parse(req.body.data)
+            console.log(payload);
+            
+            orchestrator(res, payload, map, aliases, [])
+        })
+    })
+    // }
+})
+
+function orchestrator(res, payload, map, aliases, result) {
+    return new Promise((resolve, reject) => {
+        console.log("result before run", result);
+
+        if (Object.keys(map).length == 0) {
+            console.log("time to resolve");
+            res.json(result)
+            // return resolve(result)
+        }
+            
+        else {
+            for (const [functionName, metadata] of Object.entries(map)) {
+                // console.log(functionName, metadata, aliases[functionName]);
+                if (metadata.wait_for.length == 0) {
+                    let url = `http://${constants.master_address}:${constants.master_port}/serverless/execute/${aliases[functionName]}`
+                    console.log(url);
+                    let data = {
+                        method: 'post',
+                        body: JSON.stringify({
+                            runtime: metadata.runtime,
+                            payload
+                        }),
+                        headers: { 'Content-Type': 'application/json' }
+                    }
+                    delete map[functionName]
+                    fetch(url, data).then(res => res.json())
+                        .then(json => {
+                            console.log(json);
+                            result.push(json)
+                            for (const [_key, metadata] of Object.entries(map)) {
+                                let index = metadata.wait_for.indexOf(functionName)
+
+                                if (index >= 0)
+                                    metadata.wait_for.splice(index, 1);
+                            }
+                            console.log(map, "after run");
+                            orchestrator(res, payload, map, aliases, result)
+                        })
+                }
+            }
+            // return resolve(result)
+        }
+        
+            // await fetch(constants.master_address)
+    })
+    
+}
+
+function readMap(filename) {
+    return new Promise((resolve, reject) => {
+        fs.readFile(filename, (err, data) => {
+            if (err)
+                reject(err)
+            else {
+                const object = JSON.parse(data)
+                resolve(object)
+            }
+        })
+    })
+}
+
 function createDirectory(path) {
     return new Promise((resolve, reject) => {
         if (!fs.existsSync(path)) {
@@ -195,12 +278,4 @@ function createDirectory(path) {
     })
 }
 
-router.post('/execute', (req, res) => {
-    
-})
-
-async function orchestrator(payload, res) {
-
-}
-
 module.exports = router;

dispatch_system/dispatch_manager/repository/worker_env/env.js

@@ -5,7 +5,7 @@ let request = require('request')
 const process = require('process')
 
 const app = express()
-let port = 5000, resource_id, functionHash, runtime, idleTime = 30
+let port = 5000, resource_id, functionHash, runtime, idleTime = 300
 
 resource_id = process.argv[2]
 functionHash = process.argv[3]
@@ -36,13 +36,15 @@ app.post('/serverless/function/execute/', (req, res) => {
     })
 })
 
-app.post('/serverless/worker/timeout', (req, res) => {
+app.post('/serverless/function/timeout', (req, res) => {
     idleTime = req.body.timeout
     console.log("Idle time set to: ", idleTime);
-    
+    res.json({
+        status: "success"
+    })
 })
 
-function executor(payload) {
+async function executor(payload) {
     return new Promise((resolve, reject) => {
         
     })