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Code Block

language	js
theme	Confluence
title	Project StructureDJango

├── e2e
├── src
│   ├── app   
│   │   ├── core     
│   │   │   ├── models
│   │   │   └── services 
│   │   ├── shared
│   │   │   ├── components                  # container of all general components 
│   │   │   └── utils                       # container of all general functions 
│   │   ├── views                           # container of all business pages
│   │   │   ├── alarm 
│   │   │   └── ......                      
│   │   ├── app-routing.module.ts                                             
│   │   ├── app.component.css                                            
│   │   ├── app.component.less                                              
│   │   ├── app.component.html                                                                                         
│   │   ├── app.component.ts                                                                                                  
│   ├── assets 
│   │   ├── json                            # container of mock data assets     
│   │   ├── i18n                            # container of internationalization assets                      
│   │   └── images   
│   ├── environments 
│   ├── favicon.ico                        
│   ├── index.html    
│   ├── style.css  
│   ├── style.less                         
│   ├── my-theme.css 
│   ├── my-theme.less  
│   ├── main.ts  
│   ├── polyfill.ts   
│   ├── test.ts   
│   ├── tsconfig.app.json 
│   ├── tsconfig.spec.json 
│   ├── typing.d.ts 
├── .angular-cli.json
├── CHANGELOG.md                            # recorder of all the important changes 
├── karma.conf.js 
├── localproxy.conf.json                    # config for mock server proxy 
├── proxy.conf.json                         # config for server proxy 
├── tsconfig.json
├── package.json
└── README.md

...

Code Block

language	js
theme	DJangoConfluence

//home.service.ts ——————local codes
…………

  baseUrl = "./assets/json/"
  url = {
    home_serviceData: this.baseUrl + "/home_serviceData.json",
    home_alarmData: this.baseUrl + "/home_alarmData.json",
    home_alarmChartData: this.baseUrl + "/home_alarmChartData.json",
    home_servicebarData:this.baseUrl + "/home_servicebar.json",
    sourceNames: this.baseUrl + "/SourceName.json",
    listSortMasters:this.baseUrl+"/listSortMsters.json",
  }


//home.service.ts ——————online codes
…………
  url = {
    home_serviceData: this.baseUrl + "/uui-lcm/serviceNumByCustomer",
    home_alarmData: this.baseUrl + "/alarm/statusCount",
    home_alarmChartData: this.baseUrl + "/alarm/diagram",
    home_servicebarnsData: this.baseUrl + "/uui-lcm/ns-packages",
    sourceNames: this.baseUrl + "/alarm/getSourceNames",
    listSortMasters: this.baseUrl + "/listSortMasters",
  }

...

Since json-server provides basic service to the mock server, let’s setup first.

Code Block

language	jsbash
theme	DJangoConfluence

npm install -g json-server

...

Code Block

language	js
theme	Confluence
title	package.jsonDJango

"mockproxy": "ng serve --proxy-config localproxy.conf.json”, // switch local server to mock server
"mockconfig": "node ./src/app/mock/server.js --port 3002”,  // start local mock server
"mock": "npm run mockconfig | npm run mockproxy",

By those configuration, we have achieved the goal of ‘one command startup’. Later, we should write specific commands to json-server to tell it what to do exactly.

8.1.2 Creating server.js

Firstly, we have to create a ‘mock’ folder in the path /app to contain all the configurable files related to mock server, which achieves the goal of separating the business codes and mock data codes. Now, we can do whatever we need in this folder to operate the mock server without any side effects to the business.
Secondly, we create server.js. It is such an important configuration file while json-server is running. We follow the flow image below to write this file:

...

Code Block

language	js
theme	Confluence
title	server.jsDJango

const jsonServer = require('json-server');
const server = jsonServer.create();
const middlewares = jsonServer.defaults();
const customersRouters = require('./routes');
const baseUrl = "/usecaseui-server/v1”;

// Set default middlewares
server.use(middlewares);

// Get mock data
const fs = require('fs');
const path = require('path');

let localJsonDb = {};  //import mock datas
const mockFolder = './src/app/mock/json'; //mock json path folder
const filePath = path.resolve(mockFolder);

fileDisplay(filePath);

function fileDisplay(filePath) {
    let fileList = [];
    // Return filelist on based of filePath
    const files = fs.readdirSync(filePath);
    files.forEach((filename) => {
        // Get filename's absolute path
        let filedir = path.join(filePath, filename);
        // Get the file information according to the file path and return an fs.Stats object
        fs.stat(filedir, (err, stats) => {
            if (err) {
                console.warn('Get files failed......');
            } else {
                let isFile = stats.isFile(); // files
                let isDir = stats.isDirectory(); //files folder
                if (isFile) {
                    fileList.push(path.basename(filedir, '.json'));
                    fileList.forEach(item => {
                        localJsonDb[item] = getjsonContent(item);
                    })
                }
                if (isDir) {
                    fileDisplay(filedir);
                }
                Object.keys(fakeoriginalData).map(item => {
                    localJsonDb[item] = fakeoriginalData[item];
                })
            }
        })
    })
    setTimeout(() => {
        runServer(localJsonDb);
    }, 100)
}

function getjsonContent(path) {
    let newpath = `./src/app/mock/json/${path}.json`;
    let result = JSON.parse(fs.readFileSync(newpath));
    return result;
}

function serverRewrite() {
    server.use(jsonServer.rewriter(customersRouters))
}

function runServer(db) {
    server.use(jsonServer.router(db));
}

server.listen(3002, () => {
    console.log('Mock Server is successfully running on port 3002!')
});

...

Let’s explain the code briefly.

To Firstly, to reduce the cost of modification, this program read the mock data files and use the file names as forwarding interface paths:

Code Block

language	js
theme	DJangoConfluence

………    
    let fileList = [];
    // Return filelist on based of filePath
    const files = fs.readdirSync(filePath);
    files.forEach((filename) => {
        // Get filename's absolute path
        let filedir = path.join(filePath, filename);
        // Get the file information according to the file path and return an fs.Stats object
        fs.stat(filedir, (err, stats) => {
            if (err) {
                console.warn('Get files failed......');
            } else {
                let isFile = stats.isFile(); // files
                let isDir = stats.isDirectory(); //files folder
                if (isFile) {
                    fileList.push(path.basename(filedir, '.json'));
                    fileList.forEach(item => {
                        localJsonDb[item] = getjsonContent(item);
                    })
                }
                if (isDir) {
                    fileDisplay(filedir);
                }
                Object.keys(fakeoriginalData).map(item => {
                    localJsonDb[item] = fakeoriginalData[item];
                })
            }
        })
    })
………
function getjsonContent(path) {
    let newpath = `./src/app/mock/json/${path}.json`;
    let result = JSON.parse(fs.readFileSync(newpath));
    return result;
}
………

...

Code Block

language	js
theme	DJangoConfluence

{  
………
  'uui-sotn_getPinterfaceByVpnId': { 'vpn-binding': [ [Object] ] },
  'uui-sotn_getPnfInfo': {
    'pnf-name': 'pnf1000',
    'pnf-id': '79',
    'in-maint': true,
    'resource-version': '195',
    'admin-status': 'up',
    'operational-status': 'up',
    'relationship-list': { relationship: [Array] }
  },
  'uui-sotn_getSpecificLogicalLink': {
    'link-name': 'nodeId-79-ltpId-4_nodeId-78-ltpId-4',
    'in-maint': false,
    'link-type': 'some type',
    'speed-value': 'some speed',
    'resource-version': '13031',
    'operational-status': 'up',
    'relationship-list': { relationship: [Array] }
  },
  xuran_test_data: {
    'esr-system-info-id': 'xuran',
    'service-url': 'http://10.10.10.10:8080/',
    'user-name': 'demo',
    'password': 'demo123456!',
    'system-type': 'ONAP',
    'resource-version': '18873'
  }
………
}

The object above uses the names of json files as object keys and uses the contents as object values, which can be accepted by json-server.
This method needs to rename all the original files. The new names should follow the rules that a file name must contain request path names and underlines. E.g. if we want to create a mock data file for the path: /alarm/form/data, we have to name the json file as ‘alarm_form_data.json’. This operation increases the burden of modifying the existed mock data files’ names, however, just one time modification is enough. What’s more, for the new joined developers, they just have to create a json file and name it under the rules of ‘request paths and underlines’ and they can easily get mock data they want. That’s not a bad idea.

Secondly, this program import ‘middleware’ in json-server, so that developers only have to pass the data object into the ‘router’ middleware to implement forwarding data interface.

Code Block

language	js
theme	Confluence

function runServer(db) {
    server.use(jsonServer.router(db));
}

Thirdly, The imported data object keys are connected by underlines, e.g. ‘alarm_form_data’, but the real paths are connected by slashes, e.g. ‘/alarm/form/data’, so that’s why we have to configure routes.js to deal with it. What’s more, we need another middleware ‘rewriter’ to apply the configuration written in routes.js.

Code Block

language	js
theme	Confluence
title	Import routes.js

const customersRouters = require('./routes’);
………
function serverRewrite() {
    server.use(jsonServer.rewriter(customersRouters))
}

Code Block

language	js
theme	Confluence
title	Configuration in routes.js

…………
module.exports =
{
   ///////<-------------general interface--------->/////
        "/api/*": "/$1",
        "/*/*": "/$1_$2",
        "/*/*/*": "/$1_$2_$3",
        "/*/*/*/*": "/$1_$2_$3_$4",
  /////////////////////////////////////////////////////
}

Since then, a basic local server has been built. When you tap ‘npm run mock’, most of the APIs can be mocked. Hurray!

8.1.3 Creating faker.js

To achieve the goal of separated development of frontend and backend, we need some powerful tools. Mock.js seems a good choice but for json-server, faker.js is always a perfect partner.
We follow the flow bellow to make faker.js work in our program:

Image Added

Image 3

Let’s install it first.

Code Block

language	bash
theme	Confluence

npm install faker

Then, let’s create a /mock/mock folder to manage the fake data generated by faker.js. In our project, we create two files in this folder.
The first one is responsible to the function of generating fake data.

Code Block

language	js
theme	Confluence
title	mock.js

const fakeData = require('./fakedata.js');
module.exports = {
    //Mock json
    'customer_info': fakeData.customer,
    'alarm_formdata_multiple': fakeData.customer,
    'home': fakeData.home,
    'language': fakeData.language,
}

The second one is responsible to the function of creating fake data object.

Code Block

language	js
theme	Confluence
title	mock.js

const fakeData = require('./fakedata.js');
module.exports = {
    //Mock json
    'customer_info': fakeData.customer,
    'alarm_formdata_multiple': fakeData.customer,
    'home': fakeData.home,
    'language': fakeData.language,
}

By the operation above, we have to import the fake data object into server.js and merge it with the object generated by local mock data files.

Code Block

language	js
theme	Confluence
title	Import fake data object and merge it into the existed data object

const fakeoriginalData = require('./fake/mock.js');  //import datas generated in fakedata.js
………
   files.forEach((filename) => {
          ……………
 
          if (isDir) {
             fileDisplay(filedir);
          }
          Object.keys(fakeoriginalData).map(item => {
              localJsonDb[item] = fakeoriginalData[item];
          })
    })

By all these operations above, we have the capacity to support a totally independent frontend development. Hurray! Hurray!

8.2 Customized Configuration

After met the basic requirement, we have to solve the difficulties discussed in Chapter 5.

8.2.1 Customized Request Routes

As we know that json-server can read the request routes automatically, however, if those paths are ‘irregular’,the basic methods will not work. For example, the program can not handle this kind of request:

Code Block

language	js
theme	Confluence

createServiceType: this.baseUrl + "/uui-lcm/customers/*_*/service-subscriptions/*+*", 
getCustomerresourceVersion: this.baseUrl + "/uui-lcm/customers/*_*", 
getServiceTypeResourceVersion: this.baseUrl + "/uui-lcm/customers/*_*/service-subscriptions/*+*",

The *_* and *+* represent variables. The routes above contains several variables which makes it hard for json-server to handle automatically, so that’s why we need routes.js and configure all the specially routes in it:

Code Block

language	js
theme	Confluence
title	routes.js

"/uui-lcm/serviceNumByServiceType/:customer": "/CustomersColumn",
"/uui-lcm/customers/:customer": "/getCustomerresourceVersion”,
"/uui-lcm/customers/:customer/service-subscriptions/:id": "/getServiceTypeResourceVersion",

By configuring, we clarify all the irregular routes. Next, we just need to import the file into server.js and use it as Chapter 8.1.2

8.2.2 Interface Interception

As we have discussed in Chapter 5, in this project, one single API route can be used by several different request methods and all these requests have their specific response data format which is totally different from that provided by json-server. For example:

Code Block

language	js
theme	Confluence
title	Service Module

    customers: this.baseUrl + "/uui-lcm/customers", /* get */
    deleteCustomer: this.baseUrl + "/uui-lcm/customers", /* delete */
    createCustomer: this.baseUrl + "/uui-lcm/customers/", /* put */
    ……………
 
    getAllCustomers() {
        return this.http.get<any>(this.url.customers);
    }
 
    createCustomer(customer, createParams) {
        let url = this.url.createCustomer + customer;
        return this.http.put(url, createParams);
    }
 
    deleteSelectCustomer(paramsObj) {
        let url = this.url.deleteCustomer;
        let params = new HttpParams({ fromObject: paramsObj });
        return this.http.delete(url, { params });
    }

As the codes shown, ‘/uui-lcm/customers’ is used by PUT, DELETE and GET method. The program must intercept all those routes and mark them with different request methods, otherwise json-server would not return the response data we create and since we ignore the db.json which is to contain the mock data json-server created, there will be error 404. Here’s the codes in server.js:

Code Block

language	js
theme	Confluence
title	server.js

const fs = require('fs');
const path = require('path');
const jsonServer = require('json-server');
const server = jsonServer.create();
const middlewares = jsonServer.defaults();
const customersRouters = require('./routes');
const baseUrl = "/usecaseui-server/v1";
…………
server.post(`${baseUrl}/*`, (req, res, next) => {
    const prefix = req.url.replace(baseUrl, "");
    req.url = `${baseUrl}/POST${prefix}`;
    req.method = 'GET';
    next();
})
server.put(`${baseUrl}/*`, (req, res, next) => {
    const prefix = req.url.replace(baseUrl, "");
    req.url = `${baseUrl}/PUT${prefix}`;
    req.method = 'GET';
    next();
})
server.delete(`${baseUrl}/*`, (req, res, next) => {
    const prefix = req.url.replace(baseUrl, "");
    req.url = `${baseUrl}/DELETE${prefix}`;
    req.method = 'GET';
    next();
})
……………

The codes above uses json-server to intercept data interfaces of different request methods and then rewrite the previous request routes, as well as switch all the request methods to GET. Later, we have to change routes.js and specific json files names to make the changes work.

Code Block

language	js
theme	Confluence
title	routes.js

"/PUT/uui-lcm/customers/:name/service-subscriptions/:id": "/PUT_uui-lcm_customers_service-subscriptions”,
"/DELETE/uui-lcm/customers/:customer/service-subscriptions/:id": "/DELETE_uui-lcm_customers_service-subscriptions",

Image Added

Image 4

The reason why we do these changes is that at the developing period of a project, frontenders only have to be focused on the request parameters and response data. In other words, request methods means little for a frontender in this period so that we transfer all the request methods to GET temporarily to make mock server normally work.

Now, we have achieved all the optimization goals and a mock server can finally run healthily by one command. Hurray! Hurray! Hurray!

9. Final Result

After the optimization, the mock data scheme has been built. This new scheme supports ‘one command startup’ and allows frontenders develop independently when the backenders are not ready. And of course, this scheme perfectly reuses the original mock data files which makes this optimization the least cost.
At last, I’d like to show the final result of our work. You can also see the codes in the Gerrit repo (https://gerrit.onap.org/r/admin/repos/usecase-ui)

The mock folder structure is as follow:

Image Added

Image 5

The related configuration in package.json is as follow:

Code Block

language	js
theme	Confluence
title	package.json

"scripts": {
    "ng": "ng",
    "start": "ng serve",
    "server": "ng serve --proxy-config proxy.conf.json",
    "mockproxy": "ng serve --proxy-config localproxy.conf.json",
    "mockconfig": "node ./src/app/mock/server.js --port 3002",
    "mock": "npm run mockconfig | npm run mockproxy”,
    ………
 },

The full codes of server.js is as follow:

Code Block

language	js
theme	Confluence
title	server.js

const jsonServer = require('json-server');
const server = jsonServer.create();
const middlewares = jsonServer.defaults();
const customersRouters = require('./routes');
const baseUrl = "/usecaseui-server/v1";

// Set default middlewares (logger, static, cors and no-cache)
server.use(middlewares);

// Get mock data
const fs = require('fs');
const path = require('path');

let localJsonDb = {};  //import mock datas
const fakeoriginalData = require('./fake/mock.js');  //import datas created in fakedata.js
const mockFolder = './src/app/mock/json'; //mock json path folder
const filePath = path.resolve(mockFolder);

fileDisplay(filePath);

function fileDisplay(filePath) {
    let fileList = [];
    // Return filelist on based of filePath
    const files = fs.readdirSync(filePath);
    files.forEach((filename) => {
        // Get filename's absolute path
        let filedir = path.join(filePath, filename);
        // Get the file information according to the file path and return an fs.Stats object
        fs.stat(filedir, (err, stats) => {
            if (err) {
                console.warn('Get files failed......');
            } else {
                let isFile = stats.isFile(); // files
                let isDir = stats.isDirectory(); //files folder
                if (isFile) {
                    fileList.push(path.basename(filedir, '.json'));
                    fileList.forEach(item => {
                        localJsonDb[item] = getjsonContent(item);
                    })
                }
                if (isDir) {
                    console.warn("=====> DO NOT support mock data in folder");
                    fileDisplay(filedir);
                }
                Object.keys(fakeoriginalData).map(item => {
                    localJsonDb[item] = fakeoriginalData[item];
                })
            }
        })
    })
    setTimeout(() => {
        serverRewrite();
        runServer(localJsonDb);
    }, 100)
}

function getjsonContent(path) {
    let newpath = `./src/app/mock/json/${path}.json`;
    let result = JSON.parse(fs.readFileSync(newpath));
    return result;
}

//only multi router data needs jsonServer.rewriter
function serverRewrite() {
    server.use(jsonServer.rewriter(customersRouters))
}

function runServer(db) {
    server.use(jsonServer.router(db));
}
server.post(`${baseUrl}/*`, (req, res, next) => {
    const prefix = req.url.replace(baseUrl, "");
    req.url = `${baseUrl}/POST${prefix}`;
    req.method = 'GET';
    next();
})
server.put(`${baseUrl}/*`, (req, res, next) => {
    const prefix = req.url.replace(baseUrl, "");
    req.url = `${baseUrl}/PUT${prefix}`;
    req.method = 'GET';
    next();
})
server.delete(`${baseUrl}/*`, (req, res, next) => {
    const prefix = req.url.replace(baseUrl, "");
    req.url = `${baseUrl}/DELETE${prefix}`;
    req.method = 'GET';
    next();
})

server.listen(3002, () => {
    console.log('Mock Server is successfully running on port 3002!')
});

That's all our jobs. Looking forward to suggestion and discussion.

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8.1.2 Creating server.js

8.1.3 Creating faker.js

8.2 Customized Configuration

8.2.1 Customized Request Routes

8.2.2 Interface Interception

Image Added

9. Final Result