SpringBoot中使用MongoDB的连接池配置

• 配置文件映射为javabean
• 覆盖mongodbfactory
• mongodb测试
• 创建dao接口及实现
  

在springboot中，我们可以通过引入 spring-boot-starter-data-mongodb 依赖来实现spring-data-mongodb 的自动配置。但是，默认情况下，该依赖并没有像使用mysql或者redis那样为我们提供连接池配置的功能。因此，我们需要自行重写 mongodbfactory，实现mongodb客户端连接的参数配置扩展。需要说明的是，mongodb的客户端本身就是一个连接池，因此，我们只需要配置客户端即可。

引入依赖

 <parent>
  <groupid>org.springframework.boot</groupid>
  <artifactid>spring-boot-starter-parent</artifactid>
  <version>2.0.2.release</version>
 </parent>
 <dependencies>
  <dependency>
   <groupid>org.springframework.boot</groupid>
   <artifactid>spring-boot-starter-data-mongodb</artifactid>
  </dependency>
  <dependency>
   <groupid>org.springframework.boot</groupid>
   <artifactid>spring-boot-starter-test</artifactid>
   <scope>test</scope>
  </dependency>
 </dependencies>

配置文件

为了方便对mongodb进行统一管理，我们将相关的配置抽取到 mongo-pool.properties 中，前缀为spring.data.mongodb（前缀可自己随意配置）：

spring.data.mongodb.address=172.16.250.234:27017,172.16.250.239:27017,172.16.250.240:27017
spring.data.mongodb.replica-set=rs0
spring.data.mongodb.database=test
spring.data.mongodb.username=admin
spring.data.mongodb.password=admin
 
# configure spring.data.mongodbdb pool
spring.data.mongodb.min-connections-per-host=10
spring.data.mongodb.max-connections-per-host=100
spring.data.mongodb.threads-allowed-to-block-for-connection-multiplier=5
spring.data.mongodb.server-selection-timeout=30000
spring.data.mongodb.max-wait-time=120000
spring.data.mongodb.max-connection-idel-time=0
spring.data.mongodb.max-connection-life-time=0
spring.data.mongodb.connect-timeout=10000
spring.data.mongodb.socket-timeout=0
spring.data.mongodb.socket-keep-alive=false
spring.data.mongodb.ssl-enabled=false
spring.data.mongodb.ssl-invalid-host-name-allowed=false
spring.data.mongodb.always-use-m-beans=false
spring.data.mongodb.heartbeat-socket-timeout=20000
spring.data.mongodb.heartbeat-connect-timeout=20000
spring.data.mongodb.min-heartbeat-frequency=500
spring.data.mongodb.heartbeat-frequency=10000
spring.data.mongodb.local-threshold=15
spring.data.mongodb.authentication-database=auth_dev

配置文件映射为javabean

为方便调用，将上述配置包装成一个配置实体类，代码如下:

import java.util.list;
 
import org.springframework.boot.context.properties.configurationproperties;
import org.springframework.context.annotation.propertysource;
import org.springframework.stereotype.component;
 
@component
@propertysource(value = "classpath:mongo-pool.properties")
@configurationproperties(prefix = "spring.data.mongodb")
public class mongosettingsproperties {
 
 private list<string> address;
 private string replicaset;
 private string database;
 private string username;
 private string password;
 private integer minconnectionsperhost = 0;
 private integer maxconnectionsperhost = 100;
 private integer threadsallowedtoblockforconnectionmultiplier = 5;
 private integer serverselectiontimeout = 30000;
 private integer maxwaittime = 120000;
 private integer maxconnectionidletime = 0;
 private integer maxconnectionlifetime = 0;
 private integer connecttimeout = 10000;
 private integer sockettimeout = 0;
 private boolean socketkeepalive = false;
 private boolean sslenabled = false;
 private boolean sslinvalidhostnameallowed = false;
 private boolean alwaysusembeans = false;
 private integer heartbeatconnecttimeout = 20000;
 private integer heartbeatsockettimeout = 20000;
 private integer minheartbeatfrequency = 500;
 private integer heartbeatfrequency = 10000;
 private integer localthreshold = 15;
 private string authenticationdatabase;
 
 // 省略getters和setters方法
}

覆盖mongodbfactory

自定义创建一个mongodbfactory用来替代springboot为我们自动装配的mongodbfactory，代码如下：

import java.util.arraylist;
import java.util.list;
 
import org.slf4j.logger;
import org.slf4j.loggerfactory;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.context.annotation.bean;
import org.springframework.context.annotation.configuration;
import org.springframework.data.mongodb.mongodbfactory;
import org.springframework.data.mongodb.core.simplemongodbfactory;
 
import com.mongodb.mongoclient;
import com.mongodb.mongoclientoptions;
import com.mongodb.mongocredential;
import com.mongodb.serveraddress;
 
@configuration
public class mongoconfig {
 
 private static final logger logger = loggerfactory.getlogger(mongoconfig.class);
 
 // 覆盖容器中默认的mongodbfacotry bean
 @bean
 @autowired
 public mongodbfactory mongodbfactory(mongosettingsproperties properties) {
 
  // 客户端配置（连接数，副本集群验证）
  mongoclientoptions.builder builder = new mongoclientoptions.builder();
  builder.connectionsperhost(properties.getmaxconnectionsperhost());
  builder.minconnectionsperhost(properties.getminconnectionsperhost());
  if (properties.getreplicaset() != null) {
   builder.requiredreplicasetname(properties.getreplicaset());
  }
  builder.threadsallowedtoblockforconnectionmultiplier(
    properties.getthreadsallowedtoblockforconnectionmultiplier());
  builder.serverselectiontimeout(properties.getserverselectiontimeout());
  builder.maxwaittime(properties.getmaxwaittime());
  builder.maxconnectionidletime(properties.getmaxconnectionidletime());
  builder.maxconnectionlifetime(properties.getmaxconnectionlifetime());
  builder.connecttimeout(properties.getconnecttimeout());
  builder.sockettimeout(properties.getsockettimeout());
  // builder.socketkeepalive(properties.getsocketkeepalive());
  builder.sslenabled(properties.getsslenabled());
  builder.sslinvalidhostnameallowed(properties.getsslinvalidhostnameallowed());
  builder.alwaysusembeans(properties.getalwaysusembeans());
  builder.heartbeatfrequency(properties.getheartbeatfrequency());
  builder.minheartbeatfrequency(properties.getminheartbeatfrequency());
  builder.heartbeatconnecttimeout(properties.getheartbeatconnecttimeout());
  builder.heartbeatsockettimeout(properties.getheartbeatsockettimeout());
  builder.localthreshold(properties.getlocalthreshold());
  mongoclientoptions mongoclientoptions = builder.build();
 
  // mongodb地址列表
  list<serveraddress> serveraddresses = new arraylist<serveraddress>();
  for (string address : properties.getaddress()) {
   string[] hostandport = address.split(":");
   string host = hostandport[0];
   integer port = integer.parseint(hostandport[1]);
   serveraddress serveraddress = new serveraddress(host, port);
   serveraddresses.add(serveraddress);
  }
 
  logger.info("serveraddresses:" + serveraddresses.tostring());
 
  // 连接认证
  // mongocredential mongocredential = null;
  // if (properties.getusername() != null) {
  //  mongocredential = mongocredential.createscramsha1credential(
  //    properties.getusername(), properties.getauthenticationdatabase() != null
  //      ? properties.getauthenticationdatabase() : properties.getdatabase(),
  //    properties.getpassword().tochararray());
  // }
 
  // 创建认证客户端
  // mongoclient mongoclient = new mongoclient(serveraddresses, mongocredential, mongoclientoptions);
 
  // 创建非认证客户端
  mongoclient mongoclient = new mongoclient(serveraddresses, mongoclientoptions);
 
  // 创建mongodbfactory
  mongodbfactory mongodbfactory = new simplemongodbfactory(mongoclient, properties.getdatabase());
  return mongodbfactory;
 }
}

mongodb测试

创建数据实体

import java.io.serializable;
 
public class userentity implements serializable {
 
 private static final long serialversionuid = 1l;
 
 private long id;
 private string username;
 private string password;
 
 public long getid() {
  return id;
 }
 
 public void setid(long id) {
  this.id = id;
 }
 
 public string getusername() {
  return username;
 }
 
 public void setusername(string username) {
  this.username = username;
 }
 
 public string getpassword() {
  return password;
 }
 
 public void setpassword(string password) {
  this.password = password;
 }
 
 public string tostring() {
  return "id: " + id + ",username: " + username + ",password: " + password;
 }
}

创建dao接口及实现

public interface userdao {
 
 void saveuser(userentity user);
 
 userentity finduserbyname(string username);
}
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.data.mongodb.core.mongotemplate;
import org.springframework.data.mongodb.core.query.criteria;
import org.springframework.data.mongodb.core.query.query;
import org.springframework.stereotype.component;
 
@component
public class userdaoimpl implements userdao {
 
 @autowired
 private mongotemplate mongotemplate;
 
 @override
 public void saveuser(userentity user) {
  mongotemplate.save(user);
 }
 
 @override
 public userentity finduserbyname(string username) {
  query query = new query(criteria.where("username").is(username));
  userentity user = mongotemplate.findone(query, userentity.class);
  return user;
 }
}

编写测试代码

import java.util.optional;
 
import org.junit.test;
import org.junit.runner.runwith;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.boot.test.context.springboottest;
import org.springframework.data.domain.example;
import org.springframework.test.context.junit4.springrunner;
 
import com.pengjunlee.userdao;
import com.pengjunlee.userentity;
import com.pengjunlee.userrepository;
 
@runwith(springrunner.class)
@springboottest
public class mongotest {
 @autowired
 private userdao userdao;
 
 @autowired
 private userrepository userrepository;
 
 @test
 public void testsaveuser() {
  userentity user = new userentity();
  user.setid(88l);
  user.setusername("xiaoming");
  user.setpassword("123456");
  userdao.saveuser(user);
 }
 
 @test
 public void testfinduser01() {
  userentity user = userdao.finduserbyname("xiaoming");
  system.out.println(user);
 }
 
 @test
 public void testfinduser02() {
  userentity queryuser = new userentity();
  queryuser.setusername("xiaoming");
  example<userentity> example = example.of(queryuser);
  optional<userentity> optional = userrepository.findone(example);
  system.out.println(optional.get());
 }
}

查询结果：

id: 88,username: xiaoming,password: 123456

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