Application: Add flag in application to keep track if its running and which version.

Lib: Add restart support to shut down server.
Runner: Add better logging when shut down request is sent.
Many: Add bunch of event emitters for interested parties

core/application.mjs

@@ -34,7 +34,7 @@ export default class Application extends EventEmitter {
     this.updating = false
     this.http = new HttpServer(this.config)
     this.module = null
-    this.running = false
+    this.running = ''
     this.workers = {}
 
     // Fresh is used to indicate that when we run the application and it fails,
@@ -98,7 +98,6 @@ export default class Application extends EventEmitter {
   updateLog(message, level = 'info') {
     this.ctx.db.data.core[this.name].updater += message
     this.ctx.log[level](message)
-    this.emit('updatelog')
     return message
   }
 
@@ -113,6 +112,7 @@ export default class Application extends EventEmitter {
       if (this.ctx.db.data.core[this.name].updater !== this.msgStatic) {
         this.ctx.db.data.core[this.name].updater = ''
         this.updateLog(this.msgStatic)
+        this.emit('updatelog', this.msgStatic)
         return this.ctx.db.write().then(function() { return null })
       }
       return Promise.resolve(null)
@@ -163,6 +163,7 @@ export default class Application extends EventEmitter {
 
     try {
       log += this.updateLog(`Checking for latest version at ${new Date().toISOString().replace('T', ' ').split('.')[0]}. `, 'debug') + '\n'
+      this.emit('updatelog', log)
 
       // Get the latest version from our provider
       latest = await this.provider.getLatestVersion()
@@ -170,7 +171,8 @@ export default class Application extends EventEmitter {
       // If the versino matches the latest installed, then there's nothing to do
       if (this.ctx.db.data.core[this.name].latestInstalled === latest.version) {
         log += this.updateLog(`Found ${latest.version}. `, 'debug') + '\n'
-        this.updateLog('Already up to date, nothing to do. ', 'debug')
+        log += this.updateLog('Already up to date, nothing to do. ', 'debug')
+        this.emit('updatelog', log)
         return null
       }
 
@@ -185,7 +187,8 @@ export default class Application extends EventEmitter {
       if (found) {
         // Check if the existing version found was already installed.
         if (found.installed) {
-          this.updateLog('Version was already installed, nothing to do. ')
+          log += this.updateLog('Version was already installed, nothing to do. ')
+          this.emit('updatelog', log)
           return null
         }
 
@@ -201,12 +204,14 @@ export default class Application extends EventEmitter {
         // if so, we should skip them and consider those versions as black
         // listed and avoid at all cost.
         if (latest.failtodownload && latest.failtodownload > 3) {
-          this.updateLog('Version failed to download too many times, skipping this version. ')
+          log += this.updateLog('Version failed to download too many times, skipping this version. ')
+          this.emit('updatelog', log)
           return null
         }
 
         if (latest.failtoinstall && latest.failtoinstall > 3) {
-          this.updateLog('Version failed to install too many times, skipping this version. ')
+          log += this.updateLog('Version failed to install too many times, skipping this version. ')
+          this.emit('updatelog', log)
           return null
         }
 
@@ -217,7 +222,7 @@ export default class Application extends EventEmitter {
         latest.stable = 0
         this.ctx.db.upsertFirst(this.ctx.db.data.core[this.name].versions, latest)
       }
-
+      this.emit('updatelog', log)
       this.emit('update', latest)
 
       // The target file for the archive and the target folder for new our version
@@ -228,6 +233,7 @@ export default class Application extends EventEmitter {
       await this.fs.mkdir(folder, { recursive: true })
 
       log += this.updateLog(`Downloading ${latest.link} to ${target}. `) + '\n'
+      this.emit('updatelog', log)
       await this.ctx.db.write()
 
       // Download the latest version using the provider in question.
@@ -238,11 +244,13 @@ export default class Application extends EventEmitter {
         })
 
       log += '\n' + this.updateLog(`Extracting ${target}. `) + '\n'
+      this.emit('updatelog', log)
       await this.ctx.db.write()
 
       // Download was successful, extract the archived file that we downloaded
-      await this.ctx.util.extractFile(target, function(msg) {
+      await this.ctx.util.extractFile(target, (msg) => {
         log += msg
+        this.emit('updatelog', log)
       }).catch(function(err) {
         latest.failtodownload = (latest.failtodownload || 0) + 1
         return Promise.reject(err)
@@ -262,6 +270,7 @@ export default class Application extends EventEmitter {
         .catch((err) => {
           latest.failtodownload = (latest.failtodownload || 0) + 1
           log += this.updateLog('Version did not include or was missing index.mjs. ') + '\n'
+          this.emit('updatelog', log)
           return Promise.reject(err)
         })
 
@@ -279,6 +288,7 @@ export default class Application extends EventEmitter {
 
       if (packageStat) {
         log += this.updateLog(`running npm install --production. `) + '\n'
+        this.emit('updatelog', log)
         await this.ctx.db.write()
 
         // For some weird reason, --loglevel=notice is required otherwise
@@ -287,15 +297,20 @@ export default class Application extends EventEmitter {
           this.ctx.util.getNpmExecutable(),
           ['install', '--production', '--no-optional', '--no-package-lock', '--no-audit', '--loglevel=notice'],
           folder,
-          function(msg) { log += msg }
+          (msg) => {
+            log += msg
+            this.emit('updatelog', log)
+          }
         ).catch(function(err) {
           latest.failtoinstall = (latest.failtoinstall || 0) + 1
           return Promise.reject(err)
         })
     
         log = this.logAddSeperator(log)
+        this.emit('updatelog', log)
       } else {
         log += this.updateLog('Release did not contain package.json, skipping npm install. ') + '\n'
+        this.emit('updatelog', log)
       }
     } catch (err) {
       log += this.updateLog(`Error: ${err.message}. `) + '\n'
@@ -311,12 +326,14 @@ export default class Application extends EventEmitter {
       if (latest) {
         latest.log = log
       }
+      this.emit('updatelog', log)
       return Promise.reject(err)
     }
 
     // If we reached here then everything went swimmingly. Mark the version
     // as being installed and attach the install log to it.
     log += this.updateLog(`Finished updating ${this.name} to version ${latest.version}.`) + '\n'
+    this.emit('updatelog', log)
     this.ctx.db.data.core[this.name].latestInstalled = latest.version
     latest.installed = true
     latest.log = log
@@ -369,7 +386,22 @@ export default class Application extends EventEmitter {
     this.workers[i].started = new Date()
   }
 
-  async runVersion(version) {
+  runVersion(version) {
+    this.ctx.db.data.core[this.name].active = version
+    this.running = version
+    this.emit('running', this.running)
+
+    return this.ctx.db.write().then(() => {
+      return this._runVersion(version)
+        .catch((err) => {
+          this.running = ''
+          this.emit('running', this.running)
+          return Promise.reject(err)
+        })
+    })
+  }
+
+  async _runVersion(version) {
     this.ctx.db.data.core[this.name].active = version
     await this.ctx.db.write()
 
@@ -443,6 +475,8 @@ export default class Application extends EventEmitter {
   }
 
   closeServer() {
+    this.running = ''
+    this.emit('running', this.running)
     if (this.config.cluster && !this.isSlave) {
       if (this.__clusterWorkerDied) {
         this.cluster.off('exit', this.__clusterWorkerDied)

core/lib.mjs

@@ -37,7 +37,11 @@ export default class ServiceCore {
 
   async init(module = null) {
     this.db = await GetDB(this.config, this.log, this.dbfilename)
-    this.core = new Core(this.db, this.util, this.log)
+    this.core = new Core(this.db, this.util, this.log, () => {
+      let err = new Error('Got request to restart')
+      this.log.fatal(err)
+      process.exit(0)
+    })
     
     let provider = new StaticProvider()
     this.app = new Application({

core/runner.mjs

@@ -34,12 +34,9 @@ export async function runner(root_import_meta_url, configname = 'config.json', d
   const db = await GetDB(config, log, util.getPathFromRoot('./' + dbname))
   
   const core = new Core(db, util, log, function(msg) {
-    if (msg) {
+    let err = new Error('Got request to restart' + (msg ? ': ' + msg : ''))
-      runner.log.warn('Got a restart request: ' + msg)
+    runner.log.fatal(err)
-    } else {
+    process.exit(0)
-      runner.log.warn('Got a restart request with no message or reason')
-    }
-    process.exit(1)
   })
   await core.init()
   await core.run()

package.json

@@ -1,6 +1,6 @@
 {
   "name": "service-core",
-  "version": "3.0.0-beta.13",
+  "version": "3.0.0-beta.14",
   "description": "Core boiler plate code to install node server as windows service",
   "main": "index.mjs",
   "scripts": {

test/application.run.test.mjs

@@ -48,9 +48,11 @@ t.describe('#runVersion("static")', function() {
       assert.strictEqual(checkCtx.app, app)
     })
 
+    assert.strictEqual(app.running, '')
     assert.strictEqual(app.fresh, true)
     let err = await assert.isRejected(app.runVersion('static'))
     assert.strictEqual(app.fresh, false)
+    assert.strictEqual(app.running, '')
 
     assert.match(err.message, /http/i)
     assert.match(err.message, /createServer/i)
@@ -62,9 +64,11 @@ t.describe('#runVersion("static")', function() {
     app.config.startWaitUntilFail = 50
     app.registerModule(function() { return new Promise(function() {}) })
     
+    assert.strictEqual(app.running, '')
     assert.strictEqual(app.fresh, true)
     let err = await assert.isRejected(app.runVersion('static'))
     assert.strictEqual(app.fresh, false)
+    assert.strictEqual(app.running, '')
 
     assert.match(err.message, /time/i)
     assert.match(err.message, /out/i)
@@ -83,9 +87,11 @@ t.describe('#runVersion("static")', function() {
       })
     })
     
+    assert.strictEqual(app.running, '')
     assert.strictEqual(app.fresh, true)
     await app.runVersion('static')
     assert.strictEqual(app.fresh, false)
+    assert.strictEqual(app.running, 'static')
 
     assert.strictEqual(ctx.db.data.core.testapp.active, 'static')
   })
@@ -101,9 +107,11 @@ t.describe('#runVersion("static")', function() {
     app.config.heartbeatAttemptsWait = 5
     app.registerModule(defaultHandler(handler))
 
+    assert.strictEqual(app.running, '')
     assert.strictEqual(app.fresh, true)
     let err = await assert.isRejected(app.runVersion('static'))
     assert.strictEqual(app.fresh, false)
+    assert.strictEqual(app.running, '')
 
     assert.match(err.message, /failed/i)
     assert.match(err.message, /400/i)
@@ -121,11 +129,13 @@ t.describe('#runVersion("static")', function() {
     app.config.heartbeatAttemptsWait = 10
     app.registerModule(defaultHandler(handler))
 
+    assert.strictEqual(app.running, '')
     assert.strictEqual(app.fresh, true)
     let start = performance.now()
     let err = await assert.isRejected(app.runVersion('static'))
     let end = performance.now()
     assert.strictEqual(app.fresh, false)
+    assert.strictEqual(app.running, '')
 
     assert.match(err.message, /failed/i)
     assert.match(err.message, /time/i)
@@ -150,9 +160,11 @@ t.describe('#runVersion("static")', function() {
     app.config.heartbeatAttemptsWait = 5
     app.registerModule(defaultHandler(handler))
 
+    assert.strictEqual(app.running, '')
     let err = await assert.isRejected(app.runVersion('static'))
     assert.match(err.message, /failed/i)
     assert.match(err.message, /400/i)
+    assert.strictEqual(app.running, '')
 
     await app.closeServer()
     app.registerModule(defaultHandler(handler))
@@ -173,9 +185,11 @@ t.describe('#runVersion("static")', function() {
     app.registerModule(defaultHandler(handler))
     app.isSlave = true
 
+    assert.strictEqual(app.running, '')
     assert.strictEqual(app.fresh, true)
     await app.runVersion('static')
     assert.strictEqual(app.fresh, false)
+    assert.strictEqual(app.running, 'static')
 
     assert.strictEqual(called, 0)
     assert.strictEqual(ctx.db.data.core.testapp.active, 'static')
@@ -226,9 +240,11 @@ t.describe('#runVersion("version")', function() {
     app.config.port = assertPort
     stubFsStat.rejects(assertNotError)
 
+    assert.strictEqual(app.running, '')
     assert.strictEqual(app.fresh, true)
     let err = await assert.isRejected(app.runVersion('v100'))
     assert.strictEqual(app.fresh, true)
+    assert.strictEqual(app.running, '')
 
     assert.notStrictEqual(err, assertNotError)
     assert.match(err.message, new RegExp(assertNotError.message))
@@ -246,9 +262,11 @@ t.describe('#runVersion("version")', function() {
     await fs.mkdir(util.getPathFromRoot('./testnoexisting/v99'), { recursive: true })
     await fs.writeFile(util.getPathFromRoot('./testnoexisting/v99/index.mjs'), `throw new Error('${assertError.message}')`)
 
+    assert.strictEqual(app.running, '')
     assert.strictEqual(app.fresh, true)
     let err = await assert.isRejected(app.runVersion('v99'))
     assert.strictEqual(app.fresh, false)
+    assert.strictEqual(app.running, '')
 
     assert.notStrictEqual(err, assertError)
     assert.strictEqual(err.message, assertError.message)
@@ -262,10 +280,12 @@ t.describe('#runVersion("version")', function() {
     await fs.mkdir(util.getPathFromRoot('./testnoexisting/v98'), { recursive: true })
     await fs.writeFile(util.getPathFromRoot('./testnoexisting/v98/index.mjs'), ``)
 
+    assert.strictEqual(app.running, '')
     assert.strictEqual(app.fresh, true)
     let err = await assert.isRejected(app.runVersion('v98'))
     assert.strictEqual(app.fresh, false)
     assert.match(err.message, /start/i)
+    assert.strictEqual(app.running, '')
 
     assert.strictEqual(app.ctx.db.data.core.testnoexisting.active, 'v98')
     let checkDb = await lowdb({}, ctx.log, assertConfig)
@@ -282,9 +302,11 @@ t.describe('#runVersion("version")', function() {
     app.ctx.log.info.reset()
     app.ctx.log.event.info.reset()
 
+    assert.strictEqual(app.running, '')
     assert.strictEqual(app.fresh, true)
     await app.runVersion('v97')
     assert.strictEqual(app.fresh, false)
+    assert.strictEqual(app.running, 'v97')
 
     assert.ok(app.ctx.log.info.called)
     assert.ok(app.ctx.log.event.info.called)

test/application.test.mjs

@@ -73,7 +73,7 @@ t.describe('constructor()', function() {
     assert.strictEqual(app.ctx.sc.getLog, getLog)
     assert.strictEqual(app.name, assertName)
     assert.strictEqual(app.fresh, true)
-    assert.strictEqual(app.running, false)
+    assert.strictEqual(app.running, '')
     assert.strictEqual(app.monitoringCluster, false)
     assert.deepStrictEqual(app.workers, {})
     assert.strictEqual(app.isSlave, false)
@@ -328,10 +328,13 @@ t.describe('#closeServer()', function() {
   })
 
   t.test('should call closeServer correctly', async function() {
+    const assertNotVersion = 'v1521'
     const assertError = new Error('Moonlight Fiesta')
     stubCloseServer.rejects(assertError)
 
+    app.running = assertNotVersion
     let err = await assert.isRejected(app.closeServer())
+    assert.strictEqual(app.running, '')
 
     assert.strictEqual(err, assertError)
   })