我正在寻找在Springboot中为mongoDB创建一个连接池。我目前正在使用Springdata Mongo存储库连接数据库和集合，但不确定如何创建数据池连接
这是当前的实现方式
PersonRepository.java
package com.test.TestAPI.repository;
import java.util.List;
import org.springframework.data.mongodb.repository.MongoRepository;
import org.springframework.stereotype.Repository;
import com.test.TestAPI.dto.Person;
@Repository
public interface PersonRepository extends MongoRepository<Person, String> {
}
PersonService
package com.test.TestAPI.service.impl;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.test.TestAPI.repository.PersonRepository;
import com.test.TestAPI.dto.Person;
@Service
public class PersonService {
@Autowired
private PersonRepository personRepo;
public List<Person> findAllPersons() {
return personRepo.findAll();
}
public Person createPerson(Person person) {
return personRepo.save(person);
}
}
PersonController
package com.test.TestAPI.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.test.TestAPI.service.impl.PersonService;
import com.test.TestAPI.dto.Person;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
@RestController
@RequestMapping(path="/v1/personController")
@Api(value="Controller for Person document")
public class PersonController {
@Autowired
PersonService service;
@GetMapping("/getAllPersons")
@ApiOperation(produces = MediaType.APPLICATION_JSON_VALUE, httpMethod = "GET", response = List.class,
value = "getAllPersons from the database", notes = "Sample note")
public ResponseEntity<List<Person>> getAllPersons(){
List<Person> personList = service.findAllPersons();
return new ResponseEntity<List<Person>>(personList, HttpStatus.OK);
}
}
SimpleCommandLineConfig
package com.test.TestAPI.config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
import org.springframework.stereotype.Component;
import com.test.TestAPI.repository.PersonRepository;
import com.test.TestAPI.dto.Person;
@Component
@Order(3)
public class SimpleCommandLineConfig implements CommandLineRunner {
@Autowired
PersonRepository repo;
@Override
public void run(String... args) throws Exception {
// TODO Auto-generated method stub
System.out.println("third command line runner");
System.out.println(repo.save(new Person("rr","rr",4)));
}
}
App.java
package com.test.TestAPI.main;
import org.springframework.boot.Banner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
/**
* Hello world!
*
*/
@SpringBootApplication
@ComponentScan(basePackages= {"com.test.TestAPI"})
@EnableMongoRepositories(basePackages= {"com.test.TestAPI.repository"})
public class App
{
public static void main(String[] args) throws Exception {
SpringApplication.run(App.class, args);
}
}
此外，我想知道像MongoDB的自定义存储库这样的spring数据存储库是否负责连接池机制？在这种情况下，连接池如何发生？您能帮我吗
答案 0 :(得分：0)
我想我找到了答案。就像我们为RDBMS使用JDBC模板来存储数据库一样，spring提供了一个称为MongoTemplates的东西，它基于给定的db配置形成了一个连接池
这是示例实现
MongoClientFactory.java
StackedWidgetsDataSourceConfig.java（另一个配置类。相同的配置类也可以用于定义所有bean）
public @Bean MongoClientFactoryBean mongo() throws Exception {
MongoClientFactoryBean mongo = new MongoClientFactoryBean();
mongo.setHost("localhost");
MongoClientOptions clientOptions = MongoClientOptions.builder().applicationName("FeddBackAPI_DB")
.connectionsPerHost(2000)
.connectTimeout(4000)
//.maxConnectionIdleTime(1000000000)
.maxWaitTime(3000)
.retryWrites(true)
.socketTimeout(4000)
.sslInvalidHostNameAllowed(true)//this is very risky
.build();
mongo.setMongoClientOptions(clientOptions);
return mongo;
}
现在可以自动连接您实现或服务中的模板/ mongoOperations并使用它
package com.fmr.FeedBackAPI.config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.core.env.Environment;
import org.springframework.data.mongodb.MongoDbFactory;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.SimpleMongoDbFactory;
import com.mongodb.Mongo;
import com.mongodb.MongoClient;
@Configuration
@Import(value=MongoClientFactory.class)
public class DataSourceConfig {
@Autowired
Mongo mongo;
@Autowired
Environment env;
@Bean
public String test() {
System.out.println("mongo"+mongo);
return "rer";
}
private MongoTemplate mongoTemplate() {
MongoDbFactory factory = new SimpleMongoDbFactory((MongoClient) mongo, "mongo_test");
MongoTemplate template = new MongoTemplate(factory);
return template;
}
@Bean
@Qualifier(value="customMongoOps")
public MongoOperations mongoOps() {
MongoOperations ops = mongoTemplate();
return ops;
}
@Bean
public MongoDbFactory factory() {
MongoDbFactory factory = new SimpleMongoDbFactory((MongoClient) mongo, "mongo_test");
return factory;
}
// @Bean
// public GridFsTemplate gridFsTemplate() {
// return new GridFsTemplate(mongo, converter)
// }
@Bean
public javax.sql.DataSource dataSource() {
HikariDataSource ds = new HikariDataSource();
ds.setMaximumPoolSize(100);
// ds.setDriverClassName(env.getProperty("spring.datasource.driver-class-name"));
// ds.setJdbcUrl(env.getProperty("spring.datasource.url"));;
//ds.setUsername(env.getProperty("spring.datasource.username"));
//ds.setPassword(env.getProperty("spring.datasource.password"));
ds.addDataSourceProperty("cachePrepStmts", true);
ds.addDataSourceProperty("prepStmtCacheSize", 250);
ds.addDataSourceProperty("prepStmtCacheSqlLimit", 2048);
ds.addDataSourceProperty("useServerPrepStmts", true);
return ds;
}
}
这是application.properties（这是在本地运行的默认实例）
package com.fmr.FeedBackAPI.service.impl;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.stereotype.Service;
import com.fmr.FeedBackAPI.dto.ConfigDTO;
import static org.springframework.data.mongodb.core.query.Criteria.where;
import static org.springframework.data.mongodb.core.query.Query.query;
@Service
public class PlanConfigService {
@Autowired
@Qualifier(value="customMongoOps")
MongoOperations mongoOps;
public List<ConfigDTO> createConfigDTOList(List<ConfigDTO> configDTOList) {
List<ConfigDTO> configList = new ArrayList<>();
if(!mongoOps.collectionExists(ConfigDTO.class)) {
mongoOps.createCollection("ConfigDTO_table");
}
//create the configDTOList
mongoOps.insert(configDTOList, ConfigDTO.class);
configList = mongoOps.findAll(ConfigDTO.class, "ConfigDTO_table");
return configList;
}
public List<ConfigDTO> createConfigDTO(ConfigDTO configDTO) {
List<ConfigDTO> configList = new ArrayList<>();
if(!mongoOps.collectionExists(ConfigDTO.class)) {
mongoOps.createCollection("ConfigDTO_table");
}
//create the configDTOList
mongoOps.save(configDTO);
configList = mongoOps.find(query(where("planId").is(configDTO.getPlanId())), ConfigDTO.class,"ConfigDTO_table");
return configList;
}
}