loopback-connector-db2

IBM® DB2® is the database of choice for robust, enterprise-wide solutions handling high-volume workloads. It is optimized to deliver industry-leading performance while lowering costs. The loopback-connector-db2 module is the LoopBack connector for DB2.

The LoopBack DB2 connector supports:

• All create, retrieve, update, and delete operations.
• Queries with fields, limit, order, skip and where filters.
• All supported DB2 LUW versions.

Installation

Enter the following in the top-level directory of your LoopBack application:

$ npm install loopback-connector-db2 --save

The --save option adds the dependency to the application’s package.json file.

Configuration

Use the data source generator to add the DB2 data source to your application. The entry in the application’s server/datasources.json will look something like this:

"mydb": {
  "name": "mydb",
  "connector": "db2"
}

Edit server/datasources.json to add other supported properties as required:

"mydb": {
  "name": "mydb",
  "connector": "db2",
  "username": <username>,
  "password": <password>,
  "database": <database name>,
  "hostname": <db2 server hostname>,
  "port":     <port number>
}

The following table describes the connector properties.

Alternatively, you can create and configure the data source in JavaScript code. For example:

var DataSource = require('loopback-datasource-juggler').DataSource;
var DB2 = require('loopback-connector-db2');

var config = {
  username: process.env.DB2_USERNAME,
  password: process.env.DB2_PASSWORD,
  hostname: process.env.DB2_HOSTNAME,
  port: 50000,
  database: 'SQLDB',
};

var db = new DataSource(DB2, config);

var User = db.define('User', {
  name: { type: String },
  email: { type: String },
});

db.autoupdate('User', function(err) {
  if (err) {
    console.log(err);
    return;
  }

  User.create({
    name: 'Tony',
    email: 'tony@t.com',
  }, function(err, user) {
    console.log(err, user);
  });

  User.find({ where: { name: 'Tony' }}, function(err, users) {
    console.log(err, users);
  });

  User.destroyAll(function() {
    console.log('example complete');
  });
});

Testing

• Go to IBM DB2 trials page.
• Register for an account.
• Download either IBM DB2 or IBM DB2 Express-C.
• For documentation or more information about the installation or setup, see http://www.ibm.com/support/knowledgecenter/SSEPGG_11.1.0/com.ibm.db2.luw.kc.doc/welcome.html

IBM DB2 Express-C scenario on Windows.

• Run the setup file.
• Set user information for the DB2 Administration server.
• Write down the user information and the password that you create. User name is db2admin by default but it could be modified.
• Configure DB2 instance and write down the port number. It is 50000 by default.
• Once setup is done, Start the default DB2 and Database Client Interface Selection Wizard, and proceed with the configuration.
• Ensure that the DB2 Data server runtime client is started. The default name is DB2COPY1.
• Let’s assume your database name is sample, and schema name is STRONGLOOP.
• In Windows, start the DB2 Command window-Administrator (In Mac or Linux, use terminal with proper privileges).
• Make sure that you are in this path ...\IBM\SQLLIB\BIN (In mac, it should be ` /Users//sqllib\bin`), and type the following commands:

>set db2instance=server1

>db2 connect to sample

>db2 set schema to STRONGLOOP

• Go to loopback-connector-db2\test\init.js, and insert the proper credentials.
• Run npm test.