mhl-dispatcher/libs/db.js

A node dispatcher server for running and managing batch processes

var odp = require('node-odp'),
	CONNECTION_STRING = 'Data Source=mhladmin;User Id=/;',

	dbType = odp.OracleData.dbType,
	parameterDirection = odp.OracleData.parameterDirection,
	commandType = odp.OracleCommand.commandType,
	db = {};
'use strict';

module.exports = exports = db;

db.connection = null;

db.closed = true;

db.connect = function(){
	db.connection = new odp.OracleConnection(CONNECTION_STRING);
	return db.open();
};

db.reconnect = function(){
	db.dispose();
	return db.connect();
};

db.open = function(){
	if(db.connection){
		try{
			db.connection.open();
			db.closed = false;
			return '';
		}catch(e){
			console.log( 'Error: ' + e)
			return e;
		}
	}
	return 'No connection avaliable..';
};

db.close = function(){
	if(db.connection){
		db.connection.close();
		db.closed = true;
	}
};

db.dispose = function(){
	if(!db.closed){
		db.close();
		db.connection.dispose();
	}
	db.connection = null;
};

//Register the server with db
db.registerServer = function(server, callback){
	var params = [{
			name: 'SERVERID',
			type: dbType.INT32,
			value:'',
			direction: parameterDirection.OUTPUT
		},
		{
			name:'pBSHOSTNAME',
			type: dbType.VARCHAR2,
			size: 2000,
			value: server,
			direction: parameterDirection.INPUT
		}];
		db.executeCommand({
			commandText: 'BEGIN :SERVERID := BMD.SERVER_API.registerServer(:pBSHOSTNAME); END;',
			commandType: commandType.TEXT,
			parameters: params,
			callback: callback
		});
};

db.executeCommand = function(args){
	var cmdObject = new odp.OracleCommand(args.commandText, args.commandType, args.parameters, db.connection);
		cmdObject.executeNonQuery(args.callback || function(){});
};

db.setServerStatus = function(serverId, status, callback){
	var	params = [
		{
			name: 'pSERVERID',
			type: dbType.INT32,
			value: serverId,
			direction: parameterDirection.INPUT
		},{
			name: 'pBSSTATUSCODE',
			type: dbType.VARCHAR2,
			size: 2000,
			value: status,
			direction: parameterDirection.INPUTOUTPUT
		},{
			name: 'pBSSTATUSDESCRIPTION',
			type: dbType.VARCHAR2,
			size: 2000,
			value: '',
			direction: parameterDirection.INPUTOUTPUT
		}
	];

	db.executeCommand({
		commandText: 'BEGIN BMD.SERVER_API.setServerStatus(:pSERVERID, :pBSSTATUSCODE, :pBSSTATUSDESCRIPTION); END;',
		commandType: commandType.TEXT,
		parameters: params,
		callback: callback
	});
	
};

db.getNextBatch = function(serverId, callback){
	var params = [
		{
			name: 'pSERVERID',
			type: dbType.INT32,
			value: serverId,
			direction: parameterDirection.INPUT
		},
		{
			name: 'pBATCHID',
			type: dbType.INT32,
			value: 0,
			direction: parameterDirection.OUTPUT
		},
		{
			name: 'pBATCHTYPECODE',
			type: dbType.VARCHAR2,
			size: 2000,
			value: '',
			direction: parameterDirection.OUTPUT
		}
	];

	db.executeCommand({
		commandText: 'BEGIN BMD.BATCH_ADMIN.getNextBatch(:pSERVERID, :pBATCHID, :pBATCHTYPECODE); END;',
		commandType: commandType.TEXT,
		parameters: params,
		callback: callback
	});
};

db.getBatchParameters = function(batchId, callback){
	var params = [
		{
			name: 'pBATCHID',
			type: dbType.INT32,
			value: batchId,
			direction: parameterDirection.INPUT
		},
		{
			name: 'pResultJSON',
			type: dbType.CLOB,
			size: 5000,
			value: '',
			direction: parameterDirection.INPUTOUTPUT
		}
	];

	db.executeCommand({
		commandText: 'BEGIN BMD.BATCH_API2.getBatchParameters_JSON(:pBATCHID, :pResultJSON); END;',
		commandType: commandType.TEXT,
		parameters: params,
		callback: callback
	});
};

db.batchLog = function(batchId, logSeverity, logMessage, messageGroup, procedureName, currentState, callback){
	var params = [
		{
			name: 'pBATCHID',
			type: dbType.INT32,
			value: batchId,
			direction: parameterDirection.INPUT
		},
		{
			name: 'pBATCHLOGSEVERITY',
			type: dbType.INT32,
			value: logSeverity,
			direction: parameterDirection.INPUT
		},
		{
			name: 'pBATCHLOGMESSAGE',
			type: dbType.VARCHAR2,
			size: 2000,
			value: logMessage,
			direction: parameterDirection.INPUT
		},
		{
			name: 'pBATCHLOGMESSAGEGROUP',
			type: dbType.VARCHAR2,
			size: 2000,
			value: messageGroup,
			direction: parameterDirection.INPUT
		},
		{
			name: 'pBATCHLOGPROCEDURENAME',
			type: dbType.VARCHAR2,
			size: 1000,
			value: procedureName,
			direction: parameterDirection.INPUT
		},
		{
			name: 'pBATCHLOGCURRENTSTATE',
			type: dbType.VARCHAR2,
			size: 2000,
			value: currentState,
			direction: parameterDirection.INPUT
		}
	];

	db.executeCommand({
		commandText: 'BEGIN BMD.BATCH_ADMIN.InsertBatchLogEntry(:pBATCHID, :pBATCHLOGSEVERITY, :pBATCHLOGMESSAGE, :pBATCHLOGMESSAGEGROUP, :pBATCHLOGPROCEDUREGROUP, :pBATCHLOGCURRENTSTATE); END;',
		commandType: commandType.TEXT,
		parameters: params,
		callback: callback
	});
};

db.setBatchStatus = function(batchId, status ,callback){
	var  params = [
		{
			name: 'pBATCHID',
			type: dbType.INT32,
			value: batchId,
			direction: parameterDirection.INPUT
		},
		{
			name: 'pBATCHSTATUSCODE',
			type: dbType.VARCHAR2,
			size: 2000,
			value: status,
			direction: parameterDirection.INPUT
		}
	];

	db.executeCommand({
		commandText: 'BEGIN BMD.BATCH_ADMIN.setBatchStatus(:pBATCHID, :pBATCHSTATUSCODE); END;',
		commandType: commandType.TEXT,
		parameters: params,
		callback: callback
	});
};

db.setServerBatchDone = function(serverId, batchId, callback){
	var  params = [
		{
			name: 'pSERVERID',
			type: dbType.INT32,
			value: serverId,
			direction: parameterDirection.INPUT
		},
		{
			name: 'pBATCHID',
			type: dbType.INT32,
			value: batchId,
			direction: parameterDirection.INPUT
		}
	];

	db.executeCommand({
		commandText: 'BEGIN BMD.BATCH_ADMIN.setServerBatchDone(:pSERVERID, :pBATCHID); END;',
		commandType: commandType.TEXT,
		parameters: params,
		callback: callback
	});
};