在我的java进程中,我使用以下spring配置连接到MySql:
@Configuration
@EnableTransactionManagement
@PropertySources({ @PropertySource("classpath:/myProperties1.properties"), @PropertySource("classpath:/myProperties2.properties") })
public class MyConfiguration {
@Autowired
protected Environment env;
/**
* @return EntityManagerFactory for use with Hibernate JPA provider
*/
@Bean(destroyMethod = "destroy")
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(dataSource());
em.setJpaVendorAdapter(jpaVendorAdapter());
em.setPersistenceUnitManager(persistenceUnitManager());
return em;
}
/**
*
* @return jpaVendorAdapter that works in conjunction with the
* persistence.xml
*/
@Bean
public JpaVendorAdapter jpaVendorAdapter() {
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setDatabase(Database.valueOf(env.getProperty("jpa.database")));
vendorAdapter.setDatabasePlatform(env.getProperty("jpa.dialect"));
vendorAdapter.setGenerateDdl(env.getProperty("jpa.generateDdl", Boolean.class, false));
vendorAdapter.setShowSql(env.getProperty("jpa.showSql", Boolean.class, false));
return vendorAdapter;
}
@Bean …我正在使用Spring Boot来构建RESTful Web服务.我的IDE是Eclipse Oxygen.
我送多在HTTP GET请求每2秒通过Chrome浏览器,但它们引发一个接一个.每个请求都将等待上一个请求完成.
这是我的控制器代码:
@RestController
@RequestMapping("/dummy")
public class DummyController {
@RequestMapping(method = RequestMethod.GET)
public ResponseEntity<Map<String, String>> dummytsp(@RequestParam(value="msg", defaultValue="Hello") String msg) {
System.out.println("" + new Date() + ": ThreadId " + Thread.currentThread().getId());
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Map<String, String> response = new HashMap<>();
response.put("message", msg);
return new ResponseEntity<>(response, HttpStatus.OK);
}
}
我的控制台输出是:
Thu Sep 14 11:31:15 EDT 2017: …我正在使用 Spring Boot 2.5 编写 HTTP API 服务器。我对 Spring Boot 如何处理多个 HTTP 请求有点困惑？
假设 Spring Boot 应用程序一次处理 N 个请求。它是否为 Spring Boot 应用程序创建 N 个线程？
我应该如何创建一个线程安全的控制器？
根据最佳实践，控制器为单例。
考虑下面的代码，其中我通过自动连接的服务对象存储用户数据，这使我的代码保持状态。我将如何使以下代码线程安全。
@RestController
class ApiController {
@Autowired
IDbService< User > iDBService;
@RequestMapping(value = "/api/adduser", method = RequestMethod.POST)
public ResponseEntity<User> createUser(@RequestBody User user){
User savedUser=iDBService.create(user);
return new ResponseEntity<User>(savedUser, HttpStatus.CREATED);
}
这是我的服务实施。我在服务中共享了变量
public class IDbServiceImpl<T> implements IDBService<T>{
@Autowired
GenericRepository<T, Serializable> genericRepository;
@Override
public T create(T object) {
return genericRepository.save(object);
}
}