得力于SpringBoot的特性，整合mongoDB是很容易的，我们整合mongoDB的目的就是想用它给我们提供的mongoTemplate，它可以很容易的操作mongoDB数据库。
为了自定义连接池，我们在配置类中主要与MongoClientOptions、MongoCredential、MongoClient、MongoDbFactory打交道。最终的目的就是配置好一个MongoDbFactory的bean交由Spring管理。
Maven 依赖
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<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId></dependency> |
配置文件
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mongodb: database: bfa_mongo username: "xxx" password: "xxxxx" address: "host:port" authenticationDatabase: [设置你的认证数据库，如果有的话] # 连接池配置 clientName: ${spring.application.name} # 客户端的标识，用于定位请求来源等 connectionTimeoutMs: 10000 # TCP连接超时，毫秒 readTimeoutMs: 15000 # TCP读取超时，毫秒 poolMaxWaitTimeMs: 3000 #当连接池无可用连接时客户端阻塞等待的时长，单位毫秒 connectionMaxIdleTimeMs: 60000 #TCP连接闲置时间，单位毫秒 connectionMaxLifeTimeMs: 120000 #TCP连接最多可以使用多久，单位毫秒 heartbeatFrequencyMs: 20000 #心跳检测发送频率，单位毫秒 minHeartbeatFrequencyMs: 8000 #最小的心跳检测发送频率，单位毫秒 heartbeatConnectionTimeoutMs: 10000 #心跳检测TCP连接超时，单位毫秒 heartbeatReadTimeoutMs: 15000 #心跳检测TCP连接读取超时，单位毫秒 connectionsPerHost: 20 # 每个host的TCP连接数 minConnectionsPerHost: 5 #每个host的最小TCP连接数 #计算允许多少个线程阻塞等待可用TCP连接时的乘数，算法：threadsAllowedToBlockForConnectionMultiplier*connectionsPerHost，当前配置允许10*20个线程阻塞 threadsAllowedToBlockForConnectionMultiplier: 10 |
注意:其中的address参数可以配置为一个数组（代表集群模式）
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address: - "host:port" - "host2:port2" |
MongoConfig配置类
配置类中使用了lombok，如果你没有用lombok依赖和IDE插件，你要重写getter、Setter方法：
代码稍长，可以复制在IDEA中查看：
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import com.mongodb.MongoClient;import com.mongodb.MongoClientOptions;import com.mongodb.MongoCredential;import com.mongodb.ServerAddress;import lombok.Getter;import lombok.Setter;import lombok.extern.slf4j.Slf4j;import org.springframework.beans.factory.BeanFactory;import org.springframework.boot.context.properties.ConfigurationProperties;import org.springframework.boot.context.properties.EnableConfigurationProperties;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.Primary;import org.springframework.data.mongodb.MongoDbFactory;import org.springframework.data.mongodb.core.SimpleMongoDbFactory;import org.springframework.data.mongodb.core.convert.DbRefResolver;import org.springframework.data.mongodb.core.convert.DefaultDbRefResolver;import org.springframework.data.mongodb.core.convert.MappingMongoConverter;import org.springframework.data.mongodb.core.convert.MongoCustomConversions;import org.springframework.data.mongodb.core.mapping.MongoMappingContext;import org.springframework.validation.annotation.Validated;import javax.validation.constraints.Min;import javax.validation.constraints.NotNull;import javax.validation.constraints.Size;import java.util.ArrayList;import java.util.Arrays;import java.util.List;@Slf4j@Configuration@EnableConfigurationProperties(MongoConfig.MongoClientOptionProperties.class)public class MongoConfig { /** * monogo 转换器 * @return */ @Bean public MappingMongoConverter mappingMongoConverter(MongoDbFactory factory, MongoMappingContext context, BeanFactory beanFactory, MongoCustomConversions conversions) { DbRefResolver dbRefResolver = new DefaultDbRefResolver(factory); MappingMongoConverter mappingConverter = new MappingMongoConverter(dbRefResolver, context); // remove _class field// mappingConverter.setTypeMapper(new DefaultMongoTypeMapper(null)); mappingConverter.setCustomConversions(conversions); return mappingConverter; } /** * 自定义mongo连接池 * @param properties * @return */ @Bean public MongoDbFactory mongoDbFactory(MongoClientOptionProperties properties) { //创建客户端参数 MongoClientOptions options = mongoClientOptions(properties); //创建客户端和Factory List<ServerAddress> serverAddresses = new ArrayList<>(); 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); } //创建认证客户端 MongoCredential mongoCredential = MongoCredential.createScramSha1Credential(properties.getUsername(), properties.getAuthenticationDatabase() != null ? properties.getAuthenticationDatabase() : properties.getDatabase(), properties.getPassword().toCharArray()); MongoClient mongoClient = new MongoClient(serverAddresses.get(0), mongoCredential, options); //集群模式 if (serverAddresses.size() > 1) { mongoClient = new MongoClient(serverAddresses, new ArrayList<>(Arrays.asList(mongoCredential))); } /** ps: 创建非认证客户端*/ //MongoClient mongoClient = new MongoClient(serverAddresses, mongoClientOptions); return new SimpleMongoDbFactory(mongoClient, properties.getDatabase()); } /** * mongo客户端参数配置 * @return */ public MongoClientOptions mongoClientOptions(MongoClientOptionProperties properties) { return MongoClientOptions.builder() .connectTimeout(properties.getConnectionTimeoutMs()) .socketTimeout(properties.getReadTimeoutMs()).applicationName(properties.getClientName()) .heartbeatConnectTimeout(properties.getHeartbeatConnectionTimeoutMs()) .heartbeatSocketTimeout(properties.getHeartbeatReadTimeoutMs()) .heartbeatFrequency(properties.getHeartbeatFrequencyMs()) .minHeartbeatFrequency(properties.getMinHeartbeatFrequencyMs()) .maxConnectionIdleTime(properties.getConnectionMaxIdleTimeMs()) .maxConnectionLifeTime(properties.getConnectionMaxLifeTimeMs()) .maxWaitTime(properties.getPoolMaxWaitTimeMs()) .connectionsPerHost(properties.getConnectionsPerHost()) .threadsAllowedToBlockForConnectionMultiplier( properties.getThreadsAllowedToBlockForConnectionMultiplier()) .minConnectionsPerHost(properties.getMinConnectionsPerHost()).build(); } @Getter @Setter @Validated @ConfigurationProperties(prefix = "mongodb") public static class MongoClientOptionProperties { /** 基础连接参数 */ private String database; private String username; private String password; @NotNull private List<String> address; private String authenticationDatabase; /** 客户端连接池参数 */ @NotNull @Size(min = 1) private String clientName; /** socket连接超时时间 */ @Min(value = 1) private int connectionTimeoutMs; /** socket读取超时时间 */ @Min(value = 1) private int readTimeoutMs; /** 连接池获取链接等待时间 */ @Min(value = 1) private int poolMaxWaitTimeMs; /** 连接闲置时间 */ @Min(value = 1) private int connectionMaxIdleTimeMs; /** 连接最多可以使用多久 */ @Min(value = 1) private int connectionMaxLifeTimeMs; /** 心跳检测发送频率 */ @Min(value = 2000) private int heartbeatFrequencyMs; /** 最小的心跳检测发送频率 */ @Min(value = 300) private int minHeartbeatFrequencyMs; /** 计算允许多少个线程阻塞等待时的乘数，算法：threadsAllowedToBlockForConnectionMultiplier*connectionsPerHost */ @Min(value = 1) private int threadsAllowedToBlockForConnectionMultiplier; /** 心跳检测连接超时时间 */ @Min(value = 200) private int heartbeatConnectionTimeoutMs; /** 心跳检测读取超时时间 */ @Min(value = 200) private int heartbeatReadTimeoutMs; /** 每个host最大连接数 */ @Min(value = 1) private int connectionsPerHost; /** 每个host的最小连接数 */ @Min(value = 1) private int minConnectionsPerHost; }} |
MappingMongoConverter可以自定义mongo转换器，主要自定义存取mongo数据时的一些操作，例如 mappingConverter.setTypeMapper(new DefaultMongoTypeMapper(null)) 方法会将mongo数据中的_class字段去掉。
最后通过 new SimpleMongoDbFactory(mongoClient, properties.getDatabase())方法配置了一个MongoDbFactory交由Spring管理，Springboot会拿这个MongoDbFactory工厂bean来new一个MongoTemplate，在MongoDbFactoryDependentConfiguration类下可以看到SpringBoot帮你做得事：
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/** * Configuration for Mongo-related beans that depend on a {@link MongoDbFactory}. * * @author Andy Wilkinson */@Configuration@ConditionalOnBean(MongoDbFactory.class)class MongoDbFactoryDependentConfiguration { private final MongoProperties properties; MongoDbFactoryDependentConfiguration(MongoProperties properties) { this.properties = properties; } //SpringBoot创建MongoTemplate实例 @Bean @ConditionalOnMissingBean public MongoTemplate mongoTemplate(MongoDbFactory mongoDbFactory, MongoConverter converter) { return new MongoTemplate(mongoDbFactory, converter); @ConditionalOnMissingBean(MongoConverter.class) public MappingMongoConverter mappingMongoConverter(MongoDbFactory factory, MongoMappingContext context, MongoCustomConversions conversions) { DbRefResolver dbRefResolver = new DefaultDbRefResolver(factory); MappingMongoConverter mappingConverter = new MappingMongoConverter(dbRefResolver, context); mappingConverter.setCustomConversions(conversions); return mappingConverter; //...} |
SpringBoot利用我们配置好的MongoDbFactory在配置类中生成一个MongoTemplate，之后我们就可以在项目代码中直接@Autowired了。因为用于生成MongoTemplate的MongoDbFactory是我们自己在MongoConfig配置类中生成的，所以我们自定义的连接池参数也就生效了。
到此这篇关于SpringBoot 整合mongoDB并自定义连接池的文章就介绍到这了,更多相关SpringBoot自定义连接池内容请搜索服务器之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持服务器之家！
原文链接：https://www.cnblogs.com/keeya/p/11992267.html
