Feature : #14 : _health and _version

README.md

@@ -85,7 +85,7 @@ Powered by popular node packages : ([express](https://github.com/expressjs/expre
     * Upload single file
     * Upload multiple files
     * Download file
-
+* Health and version apis
 
 Use HTTP clients like [Postman](https://www.getpostman.com/) or [similar tools](https://chrome.google.com/webstore/search/http%20client?_category=apps) to invoke REST API calls
 
@@ -127,9 +127,10 @@ if you haven't on your system.
 | GET :fire:| [/upload](#upload-single-file)                                    | upload single file                                     |
 | GET :fire:| [/uploads](#upload-multiple-files)                                | upload multiple files                                  |
 | GET :fire:| [/download](#download-file)                                       | download a file                                        |
-| GET       | /api/tableName/describe| describe each table for its columns      |
-| GET       | /api/tables| get all tables in database                           |
-
+| GET       | /api/tableName/describe                                           | describe each table for its columns      |
+| GET       | /api/tables                                                       | get all tables in database                           |
+| GET       | [/_health](#health)                                               | gets health of process and mysql -- details query params for more details |
+| GET       | [/_version](#version)                                             | gets version of Xmysql, mysql, node|
 
 
 ## Relational Tables 
@@ -843,6 +844,54 @@ http://localhost:3000/download?name=fileName
 > For upload and download of files -> you can specify storage folder using -s option
 > Upload and download apis are available only with local mysql server
 
+## Health 
+[:arrow_heading_up:](#api-overview)
+
+http://localhost:3000/_health
+
+```
+{"process_uptime":3.858,"mysql_uptime":"2595"}
+```
+
+Shows up time of Xmysql process and mysql server
+
+
+http://localhost:3000/_health?details=1
+
+```
+{"process_uptime":1.151,"mysql_uptime":"2798",
+"os_total_memory":17179869184,
+"os_free_memory":2516357120,
+"os_load_average":[2.29931640625,2.1845703125,2.13818359375],
+"v8_heap_statistics":{"total_heap_size":24735744,
+"total_heap_size_executable":5242880,
+"total_physical_size":23521048,
+"total_available_size":1475503064,
+"used_heap_size":18149064,
+"heap_size_limit":1501560832,
+"malloced_memory":8192,
+"peak_malloced_memory":11065664,
+"does_zap_garbage":0}}
+```
+
+Provides more details on process.
+
+Infact passing any query param gives detailed health output: example below  
+
+http://localhost:3000/_health?voila
+```
+{"process_uptime":107.793,"mysql_uptime":"2905","os_total_memory":17179869184,"os_free_memory":2573848576,"os_load_average":[2.052734375,2.12890625,2.11767578125],"v8_heap_statistics":{"total_heap_size":24735744,"total_heap_size_executable":5242880,"total_physical_size":23735016,"total_available_size":1475411128,"used_heap_size":18454968,"heap_size_limit":1501560832,"malloced_memory":8192,"peak_malloced_memory":11065664,"does_zap_garbage":0}}
+```
+
+## Version
+[:arrow_heading_up:](#api-overview)
+
+http://localhost:3000/_version
+
+```
+{"Xmysql":"0.4.1","mysql":"5.7.15","node":"8.2.1"}
+```
+
 ## When to use ?
 [:arrow_heading_up:](#api-overview)
 

index.js

@@ -11,18 +11,18 @@ const dataHelp = require('./lib/util/data.helper.js');
 const Xapi = require('./lib/xapi.js');
 const cmdargs = require('./lib/util/cmd.helper.js');
 
-cmdargs.handle(sqlConfig)
+cmdargs.handle(sqlConfig);
 
 
 
 /**************** START : setup express ****************/
 let app = express();
-app.use(morgan('tiny'))
-app.use(cors())
-app.use(bodyParser.json())
+app.use(morgan('tiny'));
+app.use(cors());
+app.use(bodyParser.json());
 app.use(bodyParser.urlencoded({
   extended: true
-}))
+}));
 /**************** END : setup express ****************/
 
 
@@ -43,16 +43,14 @@ let moreApis = new Xapi(sqlConfig,mysqlPool,app);
 
 moreApis.init((err, results) => {
 
-  app.listen(sqlConfig.portNumber,sqlConfig.ipAddress)
-  var t1 = process.hrtime(t)
-  var t2 = t1[0]+t1[1]/1000000000
+  app.listen(sqlConfig.portNumber,sqlConfig.ipAddress);
+  var t1 = process.hrtime(t);
+  var t2 = t1[0]+t1[1]/1000000000;
 
 
   console.log("          Xmysql took           :    %d seconds",dataHelp.round(t2,1));
   console.log('                                                            ');
   console.log(' - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ');
 
-
-
-})
+});
 /**************** END : setup Xapi ****************/

lib/util/cmd.helper.js

@@ -1,6 +1,8 @@
 'use strict';
 const program = require('commander');
 const colors = require('colors');
+const pkginfo = require('pkginfo')(module);
+
 
 program.on('--help', () => {
   console.log('')
@@ -11,7 +13,7 @@ program.on('--help', () => {
 })
 
 program
-  .version('0.4.1')
+  .version(module.exports.version)
   .option('-h, --host <n>', 'hostname of database / localhost by default')
   .option('-u, --user <n>', 'username of database / root by default')
   .option('-p, --password <n>', 'password of database / empty by default')

lib/xapi.js

@@ -3,8 +3,11 @@
 var Xsql = require('./xsql.js');
 var Xctrl = require('./xctrl.js');
 var multer = require('multer');
-var path = require('path');
+const path = require('path');
+const pkginfo = require('pkginfo')(module);
 
+const v8 = require('v8'),
+  os = require('os');
 
 //define class
 class Xapi {
@@ -267,6 +270,12 @@ class Xapi {
       this.app.get('/download', this.downloadFile.bind(this));
       /**************** END : multer routes ****************/
 
+      /**************** START : health and version ****************/
+      this.app.get('/_health', this.asyncMiddleware(this.health.bind(this)));
+      this.app.get('/_version', this.asyncMiddleware(this.version.bind(this)));
+      /**************** END : health and version ****************/
+
+
       stat.api += 4;
 
     }
@@ -371,6 +380,50 @@ class Xapi {
 
   /**************** END : files related ****************/
 
+
+  /**************** START : health and version ****************/
+
+  async getMysqlUptime() {
+    let v = await this.mysql.exec('SHOW GLOBAL STATUS LIKE \'Uptime\';', []);
+    return v[0]['Value'];
+  }
+
+  async getMysqlHealth() {
+    let v = await this.mysql.exec('select version() as version', []);
+    return v[0]['version'];
+  }
+
+  async health(req, res) {
+
+    let status = {};
+    status['process_uptime'] = process.uptime();
+    status['mysql_uptime'] = await this.getMysqlUptime();
+
+    if (Object.keys(req.query).length) {
+      status['process_memory_usage'] = process.memoryUsage;
+      status['os_total_memory'] = os.totalmem();
+      status['os_free_memory'] = os.freemem();
+      status['os_load_average'] = os.loadavg();
+      status['v8_heap_statistics'] = v8.getHeapStatistics();
+    }
+
+    res.json(status);
+
+  }
+
+  async version(req, res) {
+
+    let version = {};
+
+    version['Xmysql'] = pkginfo.version;
+    version['mysql'] = await this.getMysqlHealth();
+    version['node'] = process.versions.node;
+    res.json(version);
+
+  }
+
+  /**************** END : health and version ****************/
+
 }
 
 

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "xmysql",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -636,6 +636,11 @@
       "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz",
       "integrity": "sha1-32BBeABfUi8V60SQ5yR6G/qmf4w="
     },
+    "pkginfo": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/pkginfo/-/pkginfo-0.4.1.tgz",
+      "integrity": "sha1-tUGO8EOd5UJfxJlQQtztFPsqhP8="
+    },
     "process-nextick-args": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-1.0.7.tgz",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "xmysql",
-  "version": "0.4.1",
+  "version": "0.4.2",
   "description": "One command to generate REST APIs for any MySql database",
   "main": "index.js",
   "scripts": {
@@ -34,6 +34,7 @@
     "morgan": "^1.9.0",
     "multer": "^1.3.0",
     "mysql": "^2.15.0",
+    "pkginfo": "^0.4.1",
     "serve-favicon": "^2.4.5"
   },
   "devDependencies": {

tests/tests.js

@@ -8,7 +8,7 @@ var whereClause = require('../lib/util/whereClause.helper.js')
 var should = require('should');
 var request = require('supertest')
 const cmdargs = require('../lib/util/cmd.helper.js');
-
+const pkginfo = require('pkginfo')(module);
 
 var args = {}
 var app = {}
@@ -1742,6 +1742,70 @@ describe('xmysql : tests', function () {
       });
   });
 
+  it('/_health should PASS', function (done) {
+
+    //post to an url with data
+    agent.get('/_health')     //enter url
+      .expect(200)//200 for success 4xx for failure
+      .end(function (err, res) {
+
+        // Handle /api/v error
+        if (err) {
+          return done(err);
+        }
+
+        res.body['process_uptime'].should.be.greaterThanOrEqual(0);
+        res.body['mysql_uptime'].should.be.greaterThanOrEqual(0);
+
+        return done();
+
+      });
+  });
+
+  it('/_health?details=1 should PASS', function (done) {
+
+    //post to an url with data
+    agent.get('/_health?details=1')     //enter url
+      .expect(200)//200 for success 4xx for failure
+      .end(function (err, res) {
+
+        // Handle /api/v error
+        if (err) {
+          return done(err);
+        }
+
+        res.body['process_uptime'].should.be.greaterThanOrEqual(0);
+        res.body['mysql_uptime'].should.be.greaterThanOrEqual(0);
+        res.body['os_total_memory'].should.be.greaterThanOrEqual(0);
+
+
+        return done();
+
+      });
+  });
+
+  it('/_version should PASS', function (done) {
+
+    //post to an url with data
+    agent.get('/_version')     //enter url
+      .expect(200)//200 for success 4xx for failure
+      .end(function (err, res) {
+
+        // Handle /api/v error
+        if (err) {
+          return done(err);
+        }
+
+        res.body['Xmysql'].should.equals(pkginfo.version);
+        res.body['mysql'].should.not.equals("");
+        res.body['node'].should.not.equals("");
+
+        return done();
+
+      });
+  });
+
+
   it('where clause unit ?_where=(abc,eq,1234) should PASS', function (done) {
 
     var err = whereClause.getConditionClause('(abc,eq,1234)')