I'm using Spring boot annotation style, and I don't understand after several searches, why the annotated field returns null.
Please below my java code:
package app.ui;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.WindowConstants;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Service;
#Service
public class MyFrame extends JFrame {
private JMenu fileMenu;
private JMenuBar menuBar;
private JMenuItem openMenuItem;
#Autowired
MyDialog myDialog;
#Autowired
JdbcTemplate jdbcTemplate;
public MyFrame() {
initComponents();
setVisible(true);
}
private void initComponents() {
jdbcTemplate.toString();
this.setTitle("Vue de ma fenêtre");
this.setSize(new Dimension(300, 150));
this.setLocationRelativeTo(null);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
this.getContentPane().setLayout(new FlowLayout());
menuBar = new JMenuBar();
fileMenu = new JMenu();
openMenuItem = new JMenuItem();
fileMenu.setText("File");
openMenuItem.setText("Inscription");
openMenuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
myDialog.setVisible(true);
}
});
fileMenu.add(openMenuItem);
menuBar.add(fileMenu);
setJMenuBar(menuBar);
//
final JButton cmd1 = new JButton("Créer Table");
getContentPane().add(cmd1);
cmd1.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
jdbcTemplate.execute("DROP TABLE customers IF EXISTS");
jdbcTemplate.execute(
"CREATE TABLE customer(id bigint(11), nom VARCHAR(55), prenom VARCHAR(55), dnaiss date)");
cmd1.setEnabled(false);
}
});
//
in this sample, jdbcTemplate.toString() returns null, and I can't understand why, because it works below in the action Performed method
Thank you for Help.
this is the way Java initializes class , first constructor got executed later class variables got initialized . untill and unless variables are part of static block .same logic is followed by spring as well .
in your example jdbcTemplate is a class variable, jdbcTemplate.toString(); is called via default constructor , while actionperformed is called on instance of MyFrame .
to know more about class initialization please check below link
http://www.javaworld.com/article/2075796/java-platform/java-101--class-and-object-initialization.html?nsdr=true
Related
I am trying to Implement InitializingBean on my StudentDaoImpl.class and in the function afterPropertiesSet() trying to execute an expression using ExpressionParser, but Spring is saying that property config is not found or is null even if I have declared config in my App.propperties.
AppConfig.class(Configuration Class)
package config;
import dao.StudentDAOImpl;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import javax.sql.DataSource;
#Configuration
#PropertySource("classpath:App.properties")
public class AppConfig {
#Bean("jdbcTemplete")
public JdbcTemplate jdbcTemplate() {
JdbcTemplate template = new JdbcTemplate();
template.setDataSource(dataSource());
return template;
}
#Bean("dataSource")
public DataSource dataSource() {
DriverManagerDataSource ds = new DriverManagerDataSource();
ds.setDriverClassName("com.mysql.cj.jdbc.Driver");
ds.setUrl("jdbc:mysql://localhost:3306/springjdbc");
ds.setUsername("root");
ds.setPassword("root");
return ds;
}
#Bean("StudentDaoImpl")
public StudentDAOImpl studentDaoImpl() {
StudentDAOImpl studentdao = new StudentDAOImpl(jdbcTemplate());
return studentdao;
}
#Bean("getProperties")
public static PropertySourcesPlaceholderConfigurer getProperties() {
return new PropertySourcesPlaceholderConfigurer();
}
}
StudentDaoImpl.class (I have removed methods of StudentDao Interface from the code below for you to see properly)
package dao;
import entities.Student;
import mapper.StudentMapper;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.expression.Expression;
import org.springframework.expression.ExpressionParser;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import java.util.List;
public class StudentDAOImpl implements StudentDAO, InitializingBean {
private JdbcTemplate jdbcTemplate;
#Value("${config}")
String s;
public StudentDAOImpl(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
#Override
public void afterPropertiesSet() throws Exception {
ExpressionParser expressionParser = new SpelExpressionParser();
System.out.println(s);
Expression expression = expressionParser.parseExpression("config");
String result = (String)expression.getValue();
System.out.println(result);
// if(result == true) {
// System.out.println("[Configuration]: Java Configuration");
// } else {
// System.out.println("[Configuration]: XML Configuration");
// }
}
}
App.properties
config=java
Also, I have seen that I was able to access the property from App.properties using #Value but not with ExpressionParser, Please help me solve this issue.
?
You are parsing a String, not the field; use
Expression expression = expressionParser.parseExpression(config);
to parse an expression in field config - however the value java is not a valid expression.
It is not at all clear what you are trying to do.
I have an issue with detecting adding a new row to the table. I want to trigger a method from some service (Spring boot) when somebody executes an insert query on the database (Postgres)
Somebody told me I can use #Scheduled annotation and check if something was added using a repository. I have to make some changes instantly (by using another method). The scheduled method should run every 5 seconds to do this instantly. Of course, this is a really bad idea because it will kill the database someday and it's not efficient.
How can I do this better?
You can write concrete implementer of org.hibernate.integrator.spi.Integrator. and give it to hibernate.integrator_provider
From ServiceRegistry we can get EventListenerRegistry and then append listener of type EventType.POST_INSERT. More events here.
Main Reference Hibernate Integrator Ref
As per the query, I have also added how to call the service method from the listener class.
Here is how I have done it:
package com.example.samplejdbctemplatecall;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import lombok.extern.slf4j.Slf4j;
import org.hibernate.boot.Metadata;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.event.service.spi.EventListenerGroup;
import org.hibernate.event.service.spi.EventListenerRegistry;
import org.hibernate.event.spi.EventType;
import org.hibernate.event.spi.PostInsertEvent;
import org.hibernate.event.spi.PostInsertEventListener;
import org.hibernate.integrator.spi.Integrator;
import org.hibernate.jpa.boot.spi.IntegratorProvider;
import org.hibernate.persister.entity.EntityPersister;
import org.hibernate.service.spi.SessionFactoryServiceRegistry;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.orm.jpa.HibernatePropertiesCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import java.util.Collections;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
#RequestMapping(path = "/entity-listener")
#RestController
public class SampleLogController {
private final SampleLogRepository sampleLogRepository;
private final SampleLogEntries sampleLogEntiries;
#Autowired
public SampleLogController(SampleLogRepository sampleLogRepository, SampleLogEntries sampleLogEntiries) {
this.sampleLogRepository = sampleLogRepository;
this.sampleLogEntiries = sampleLogEntiries;
}
// This is usually post method but for test purpose creating new log with uuid random and inserting
#GetMapping(path = "insert")
public SampleLog insertNewEntry() {
final String uuid = UUID.randomUUID().toString();
final SampleLog sampleLog = new SampleLog();
sampleLog.setMessage(uuid);
return sampleLogRepository.save(sampleLog);
}
#GetMapping(path = "list-recent-inserts")
public Map<Long, String> entries() {
return sampleLogEntiries.data();
}
}
#Slf4j
#Component
class HibernateConfig implements HibernatePropertiesCustomizer {
private final JpaEventListenerIntegrator jpaEventListenerIntegrator;
#Autowired
HibernateConfig(JpaEventListenerIntegrator jpaEventListenerIntegrator) {
this.jpaEventListenerIntegrator = jpaEventListenerIntegrator;
}
#Override
public void customize(Map<String, Object> hibernateProperties) {
log.warn("Called hibernate configuration");
hibernateProperties.put("hibernate.integrator_provider",
(IntegratorProvider) () -> Collections.singletonList(jpaEventListenerIntegrator));
}
}
#Configuration
class SampleConfiguration {
#Bean
SampleLogEntries sampleEntries() {
return new SampleLogEntries();
}
}
class SampleLogEntries {
private final ConcurrentMap<Long, String> map = new ConcurrentHashMap<>();
public void add(SampleLog sampleLog) {
this.map.put(sampleLog.getId(), sampleLog.getMessage());
}
public Map<Long, String> data() {
return Collections.unmodifiableMap(this.map);
}
}
#Repository
interface SampleLogRepository extends CrudRepository<SampleLog, Long> {
}
#Getter
#Setter
#NoArgsConstructor
#AllArgsConstructor
#Entity
class SampleLog {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String message;
}
#Service
#Slf4j
class JpaEventListenerIntegrator implements Integrator, PostInsertEventListener {
private final SampleLogEntries sampleLogEntiries;
#Autowired
JpaEventListenerIntegrator(SampleLogEntries sampleLogEntiries) {
this.sampleLogEntiries = sampleLogEntiries;
}
#Override
public void integrate(Metadata metadata, SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry) {
final EventListenerRegistry eventListenerRegistry = serviceRegistry.getService(EventListenerRegistry.class);
eventListenerRegistry
.appendListeners(EventType.POST_INSERT, this);
}
#Override
public void disintegrate(SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry) {
final EventListenerRegistry eventListenerRegistry = serviceRegistry.getService(EventListenerRegistry.class);
EventListenerGroup<PostInsertEventListener> eventListenerGroup = eventListenerRegistry
.getEventListenerGroup(EventType.POST_INSERT);
log.info("listener attached were: " + eventListenerGroup.getClass().getSimpleName());
log.error("disintegrate : " + getClass().getCanonicalName());
eventListenerGroup.clearListeners();
}
#Override
public void onPostInsert(PostInsertEvent event) {
log.info("Inserted : " + event.getEntity());
final Object entity = event.getEntity();
if (entity instanceof SampleLog) {
sampleLogEntiries.add((SampleLog) entity);
}
}
#Override
public boolean requiresPostCommitHanding(EntityPersister persister) {
return false;
}
}
The answer from #silentsudo is the best one if you only ever use JPA to update the table in question, and if you only have one process updating it.
The issue is that since you are being notified via the JPA interceptor, you won't be notified of any updates that happen outside of your JAP repository.
If you need these other notifications, then you can use Postgres' LISTEN/NOTIFY without polling by using an alternate postgresql JDBC driver, pgjdbc-ng, which implements async notifications.
With this method, you create a trigger in the database to send the notification, so you will be notified of other's updates as well. See https://www.openmakesoftware.com/postgresql-listen-notify-events-example
I could not find a neat way to integrate Spring with typed Actors.
Instead of using extensions I had declared an injector service
import akka.actor.typed.ActorSystem;
import com.akka.demo.a010.ASimpleSpringService;
import com.akka.demo.a010.AkkaSimpleBehaviour;
import lombok.Data;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
#Service
#Data
public class ActorInjector {
#Autowired
private ASimpleSpringService aSimpleSpringService;
#Autowired
private ActorInjector _self;
public ActorSystem<AkkaSimpleBehaviour.Command> createAkkaSimpleBehaviour(String actorName) {
return ActorSystem.create(AkkaSimpleBehaviour.create(_self), actorName);
}
}
This service autowires itself and pass that reference to a simple actor.
My Actor definition is as follows.
import akka.actor.typed.ActorRef;
import akka.actor.typed.Behavior;
import akka.actor.typed.javadsl.AbstractBehavior;
import akka.actor.typed.javadsl.ActorContext;
import akka.actor.typed.javadsl.Behaviors;
import akka.actor.typed.javadsl.Receive;
import com.akka.demo.a010.config.ActorInjector;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.extern.slf4j.Slf4j;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
#Slf4j
public class AkkaSimpleBehaviour extends AbstractBehavior<AkkaSimpleBehaviour.Command> {
private final List<String> messages = new ArrayList<>();
private ActorRef<List<String>> sender;
private ActorInjector actorInjector;
public interface Command extends Serializable {
}
#AllArgsConstructor
public static class TellMeSomething implements Command {
private static final long serialVersionUID = -7796709831949054890L;
#Getter
private final String message;
}
#AllArgsConstructor
public static class CollectTheResults implements Command {
private static final long serialVersionUID = 1643210899551075153L;
#Getter
private final ActorRef<List<String>> sender;
}
private AkkaSimpleBehaviour(ActorContext<Command> context, ActorInjector actorInjector) {
super(context);
this.actorInjector = actorInjector;
}
public static Behavior<Command> create(ActorInjector actorInjector) {
return Behaviors.setup(ctx -> new AkkaSimpleBehaviour(ctx,actorInjector));
}
#Override
public Receive<Command> createReceive() {
return newReceiveBuilder().onMessage(TellMeSomething.class, message -> {
messages.add(message.getMessage());
actorInjector.getASimpleSpringService().logSomething("*-*-*-*-*-*-*-*-*-*");
return Behaviors.same();
}).onMessage(CollectTheResults.class, message -> {
this.sender = message.getSender();
if (messages.size() == 4) {
this.sender.tell(messages);
}
return Behaviors.same();
}).build();
}
}
After passing the injector service I can get my autowired dependencies from that service like :
actorInjector.getASimpleSpringService().logSomething("*-*-*-*-*-*-*-*-*-*");
My ASimpleService is just a dummy service which logs an output.
import org.springframework.stereotype.Service;
import lombok.extern.slf4j.Slf4j;
#Service
#Slf4j
public class ASimpleSpringService {
public void logSomething(String message){
log.info(message);
}
}
Then in a simple RestController I am using the system as follows:
import akka.actor.typed.ActorSystem;
import akka.actor.typed.javadsl.AskPattern;
import com.akka.demo.a010.config.ActorInjector;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import java.time.Duration;
import java.util.List;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.ExecutionException;
#RestController
#Slf4j
public class MyRestController {
#Autowired
private ActorInjector actorInjector;
#GetMapping("/hello-akka")
public void greetings() {
ActorSystem<AkkaSimpleBehaviour.Command> exampleActor = actorInjector.createAkkaSimpleBehaviour("anActor");
exampleActor.tell(new AkkaSimpleBehaviour.TellMeSomething("hello"));
exampleActor.tell(new AkkaSimpleBehaviour.TellMeSomething("Who are you"));
exampleActor.tell(new AkkaSimpleBehaviour.TellMeSomething("create a child"));
exampleActor.tell(new AkkaSimpleBehaviour.TellMeSomething("Here is some message"));
CompletionStage<List<String>> result = AskPattern.ask(exampleActor, AkkaSimpleBehaviour.CollectTheResults::new, Duration.ofSeconds(10), exampleActor.scheduler());
result.whenComplete((reply, failure) -> {
if(reply != null){
log.info("The system responds in time");
} else {
log.error("The system does not respond in time");
exampleActor.terminate();
throw new RuntimeException("The system does not respond in time");
}
exampleActor.terminate();
});
try{
List<String> messages = result.toCompletableFuture().get();
messages.forEach(log::info);
} catch (InterruptedException | ExecutionException e){
e.printStackTrace();
}
}
}
My question is : I am planning to put all of my services into my ActorInjector service and these services will be injected into my actors. I am not familiar with Akka states and its side-effects however I know that it may be a bad idea to store all of these singleton services as actor states. Is it a good idea to store these services as an actor parameter ? What kind of side effects can I experience by doing this way? Can you point me the way?
I am new to testing. I have created a test case to perform a test on rest API using JUNIT Mockito. In my code I have created a test on method itemGetByid(), but when I run the test I get ApplocationContext error message. I don't know where I am going wrong.
Item Controller Test class
package com.example.demo.controller;
import com.example.demo.entities.Item;
import com.example.demo.entities.User;
import com.example.demo.service.ItemService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.stubbing.Answer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.web.servlet.MockMvc;
import java.util.*;
import static org.junit.Assert.*;
#RunWith(SpringJUnit4ClassRunner.class)
#WebMvcTest(ItemController.class)
public class ItemControllerTest {
#Autowired
MockMvc mockmvc;
#Mock
ItemService itemService;
#InjectMocks
ItemController itemController;
#Test
public void itemGetById() {
Item item = new Item();
Mockito.when(itemController.getById(10L)).thenReturn(item);
Item i = itemController.getById(10L);
assertEquals(i, item);
}
}
Item entity class
package com.example.demo.entities;
import lombok.Data;
import javax.persistence.*;
#Data
#Entity
#Table(name = "Item")
public class Item {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long itemId;
private Long customerId;
private String itemName;
private int itemPrice;
}
Item controller
package com.example.demo.controller;
import com.example.demo.entities.Item;
import com.example.demo.entities.User;
import com.example.demo.service.ItemService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
#RestController
#RequestMapping("item")
public class ItemController {
private ItemService itemService;
#Autowired
public ItemController(ItemService itemService) {
this.itemService = itemService;
}
#PostMapping("/post")
public Item post(#RequestBody Item item) {
return itemService.post(item);
}
#GetMapping
public Iterable<Item> getAll() {
return itemService.get();
}
#GetMapping("/get")
public Item getById(Long id) {
return itemService.getItem(id);
}
#DeleteMapping("/delete")
public void deleteAll() {
itemService.deleteAll();
}
}
Item Service
package com.example.demo.service;
import com.example.demo.entities.Item;
import com.example.demo.userepository.ItemRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.RequestBody;
#Service
public class ItemService {
ItemRepository itemRepository;
#Autowired
public ItemService(ItemRepository itemRepository) {
this.itemRepository = itemRepository;
}
public Item post(#RequestBody Item item) {
return itemRepository.save(item);
}
public Iterable<Item> get() {
return itemRepository.findAll();
}
public void deleteAll() {
itemRepository.deleteAll();
}
public Item getItem(Long id) {
return itemRepository.findById(id).get();
}
}
Item Repository
package com.example.demo.userepository;
import com.example.demo.entities.Item;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
#Repository
public interface ItemRepository extends CrudRepository<Item, Long> {
}
For starters, you are using SpringJUnit4ClassRunner. Try the MockitoJunitRunner.
An ItemController instance is never created in the test, so that needs to be fixed as well.
The line below will fail because itemController is not a mock.
**Mockito.when(itemController.getById(10L)).thenReturn(item);**
If itemController is converted to a mock, with the when statement, the test method doesnt validate anything because the test tells Mockito to return the item in the when statement.
Assuming the intent is to validate the ItemController getById method, the Mockito.when statement needs to describe the call to the Mock ItemService.
I have to create multiple beans of same type for different property value which is to be injected using constructor.
Currently I have used Bean scope as Prototype & created multiple methods to read different properties to create new object. How to combine all the different methods into single method and to supply different values at run time to create new bean.
package com.demo.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
#Configuration
public class ConfigClass {
#Bean(name="RC")
public JavaClient getClient(#Autowired Environment env)
{
String sName=env.getProperty("RCSName");
String aUrl=env.getProperty("RCAUrl");
String dUrl=env.getProperty("RCDUrl");
return new JavaClient(sName,aUrl,dUrl);
}
#Bean(name="O")
public JavaClient getOClient(#Autowired Environment env)
{
String sName=env.getProperty("OSName");
String aUrl=env.getProperty("OAUrl");
String dUrl=env.getProperty("ODUrl");
return new JavaClient(sName,aUrl,dUrl);
}
}
Now it is creating 2 beans as per above code. Expectation: How to combine getClient & getOClient into single method, but the property to be supplied in a loop to create multiple beans of same type JavaClient
I have modified my ConfigClass as below & created ApplicationContextAware to inject beans by reading file properties.
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;
import org.springframework.scheduling.annotation.EnableScheduling;
#Configuration
#EnableScheduling
public class ConfigClass {
#Bean
#Scope("prototype")
public JavaClient getClient(String sName,String aUrl,String dUrl)
{
return new JavaClient(sName,aUrl,dUrl);
}
}
Then Have created ApplicationContextAware to create Beans.
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.Iterator;
import java.util.List;
import javax.annotation.PostConstruct;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Component;
#Component
public class ApplicationContextProvider implements ApplicationContextAware {
private ApplicationContext applicationContext;
#Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.applicationContext = applicationContext;
}
public ApplicationContext getContext() {
return applicationContext;
}
#PostConstruct
public void init()
{
try {
String fileName = "Url.txt";
Resource resource = new ClassPathResource(fileName);
File file = resource.getFile();
List<String> lines = Files.readAllLines(file.toPath());
for (Iterator<String> iterator = lines.iterator(); iterator.hasNext();) {
String line = (String) iterator.next();
String[] s = line.split(",");
applicationContext.getBean(JavaClient.class,s[0], s[1], s[2]);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}