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4.7 Stateless Session Beans

Stateless session beans are session beans whose instances have no conversational state. This means that all bean instances are equivalent when they are not involved in servicing a client-invoked method.

The term “stateless” signifies that an instance has no state for a specific client.

However, the instance variables of the instance can contain the state across client-invoked method calls.

Prepare

Install Glassfish on AdminServer(172.17.0.5)
Create 'glassfish' user on ManagedServer(172.17.0.6)
Create 'glassfish:glassfish /opt/glassfish4' directory on ManagedServer(172.17.0.6)
Change SSH public key

	public class Main {

	private OServer server;

	public void exec() throws Exception {
	OObjectDatabaseTx db = new OObjectDatabaseTx("memory:persondb").create();
	db.getEntityManager().registerEntityClass(Person.class);

	Person nanoha = db.newInstance(Person.class);
	nanoha.setName("Nanoha");

	/*
	* To change this license header, choose License Headers in Project Properties.
	* To change this template file, choose Tools \| Templates
	* and open the template in the editor.
	*/
	package sandbox;

	import java.io.File;
	import java.text.Normalizer;

	/*
	* To change this license header, choose License Headers in Project Properties.
	* To change this template file, choose Tools \| Templates
	* and open the template in the editor.
	*/
	package cn.orz.pascal.javaee.simpletester.resources;

	import javax.ejb.EJB;
	import javax.ejb.Stateless;
	import javax.ws.rs.GET;

	sudo yum -y install samba
	sudo vi /etc/samba/smb.conf
	sudo systemctl start smb
	sudo systemctl start nmb
	sudo systemctl enable smb
	sudo systemctl enable nmb
	sudo firewall-cmd --add-service=samba
	sudo firewall-cmd --permanent --add-service=samba

	class Character
	attr_accessor :name, :hp, :df

	def initialize name, hp
	@name = name
	@hp = hp
	@atk = 2
	@df = 1
	end

	{
	"exercises":[
	{"question":"ボクと契約して、魔法少女になってよ!", "answer":"Make a contract with me, and become a Magical Girl!"},
	{"question":"問おう。貴方が私のマスターか?", "answer":"I ask you. Are you my master?"}
	]
	}

	<html>
	<head>
	<title>DataSheet</title>
	<script type="text/javascript">
	main_data = {
	"Description":"GlassFish Application Server",
	"Environment":["production"],
	"Network":{
	"Host":["localhost.localdomain"],
	"IP":["enp0s3", "10.0.2.15"]

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4.7 Stateless Session Beans

Prepare

Create Cluster