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Usage

Try to check its operation after building CHMPX Node.js addon library.

1. Construction of execution environment

First of all, you need to build an execution environment.
There are two ways to prepare for the environment. One way is to install the package. The other way is to build the chmpx nodejs addon library yourself.

1.1 Creating an environment using packages

This is a way to create an execution environment using packages.
The package of chmpx nodejs addon library is in npm.

Before installing this package, you will need the CHMPX developer package, so please refer to the CHMPX documentation.
There are two ways to install CHMPX. The first is installing from the package.(Please refer to CHMPX usage document.) The other way is to build CHMPX by yourself.(Please refer to CHMPX build document.)
Please create an environment that can use CHMPX in any way.

After installing the CHMPX in advance, install the npm package of the chmpx nodejs addon library as follows.
For details of the npm command, please refer to here.

$ npm install chmpx

1.2 Build to create an environment

You can build the chmpx nodejs addon library from the source code.
See here for how to clone and build the source code github repository.

2. Run CHMPX processes

Run CHMPX processes for server/slave node.
You can use configuration file(.ini) in test directory.
For details on how to start CHMPX process, please refer here.

2-1. Run CHMPX server node

$ chmpx -conf chmpx_server.ini

2-2. Run CHMPX slave node

$ chmpx -conf chmpx_slave.ini

3. Examples

The following shows the part that communicates with CHMPX Node.js library on each server node and slave node of CHMPX.

3-1. Client running on CHMPX server nodes

var chmpxnode      = require('chmpx');
var chmpxserverobj = new chmpxnode();

if(!chmpxserverobj.initializeOnServer('chmpx_server.ini', true)){
	console.log('[ERROR] Failed to inisialize chmpx nodejs on server node, get false from initializeOnServer');
	process.exit(1);
}

while(true){
	var outarr = new Array();

	//
	// Receive message
	//
	if(!chmpxserverobj.receive(outarr, -1)){								// wait
		console.log("[ERROR] failed to receive data on server process.");
		process.exit(1);
	}
	if(0 == outarr[1].length){
		continue;
	}

	var receive_str = outarr[1].toString();
	console.log("-->Receive = \"%s\"(utf8)",	receive_str);
	console.log("-->Receive = %s(hex)",			outarr[1].toString('hex'));

	if(receive_str == "BREAK TEST"){
		break;
	}
	var replydata = new Buffer('Reply(' + receive_str + ')');

	//
	// Reply message
	//
	result = chmpxserverobj.reply(outarr[0], replydata);

	console.log("<--Reply = \"%s\" : %s", 		replydata, result);
}

delete chmpxserverobj;
chmpxserverobj = null;

process.exit(0);

3-2. Client running on CHMPX slave nodes

var chmpxnode     = require('chmpx');
var chmpxslaveobj = new chmpxnode();

if(!chmpxslaveobj.initializeOnSlave('chmpx_slave.ini', true)){
	console.log('[ERROR] Failed to inisialize chmpx nodejs on slave node, get false from InitializeOnSlave');
	process.exit(1);
}

//
// Open msgid for slave process
//
var msgid  = chmpxslaveobj.open();

//
// Send one message
//
var result = chmpxslaveobj.send(msgid, 'TEST MESSAGE');
if(-1 == result){
	console.log('[ERROR] - [msgid:%s][data:%s] Result : false', msgid.toString('hex'), data.toString('hex'));
	return false;
}
console.log('<--- %s(hex) : %s', msgid.toString('hex'), result);

//
// Receive reply message
//
var bufarr = new Array();
result = chmpxslaveobj.receive(msgid, bufarr, 1000);

console.log('---> Receive(%s(hex)) : %s', msgid.toString('hex'), result);
console.log('     buf array length = ' + bufarr.length);

//
// Close msgid
//
if(false === chmpxslaveobj.close(msgid)){
	console.log('[ERROR] Close(msgid): failed to close msgid.');
	process.exit(1);
}

delete chmpxslaveobj;
chmpxslaveobj = null;

process.exit(0);

4. Importing and Executing

First, import the CHMPX Node.js addon library with require to read the library in the JavaScript language. After that, you can call the class, function, and method provided by CHMPX Node.js addon library. Please implement these depending on your environment and language(TypeScript etc.).

5. Other test

CHMPX Node.js addon library provides unit testing using Mocha and Chai. You can test CHMPX Node.js addon library built by using the npm command as shown below.

$ npm run test
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