基于spring3和mongodb3的spring-data-mongodb框架集成

阿里云mongodb库（3.2）（官方要求：请使用MongoDB 3.0以上版本的driver）

            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>3.2.0.RELEASE</version>
            </dependency>
            省略。。。其它spring配置

 			<dependency>
		        <groupId>org.springframework.data</groupId>
		        <artifactId>spring-data-mongodb</artifactId>
		        <!--<version>1.7.0.RELEASE</version> 需要spring4-->
                <!--<version>1.6.4.RELEASE</version> 需要spring4-->
                <version>1.4.2.RELEASE</version>
                <exclusions><!-- 去就近的mongo-java-driver依赖，因为要支持mongodb 3.x-->
                    <exclusion>
                        <groupId>org.mongodb</groupId>
                        <artifactId>mongo-java-driver</artifactId>
                    </exclusion>
                </exclusions>
		    </dependency>
            <!-- MongoDB -->
            <dependency>
                <groupId>org.mongodb</groupId>
                <artifactId>mongo-java-driver</artifactId>
                <version>2.14.2</version>
            </dependency>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:context="http://www.springframework.org/schema/context"
  xmlns:mongo="http://www.springframework.org/schema/data/mongo"
  xsi:schemaLocation="http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

  <!-- Default bean name is 'mongo' -->
  <!--<mongo:mongo host="${mongo.host}" port="${mongo.port}"/>

  <mongo:db-factory dbname="${mongo.dbname}" mongo-ref="mongo" username="${mongo.username}" password="${mongo.password}" />-->

  <mongo:db-factory uri="${mongo.uri}"/> <!--这种方式可以配置多主机 -->

  <!-- by default look for a Mongo object named 'mongo' - default name used for the converter is 'mappingConverter' -->
  
  <bean id="readConverter" class="com.***.mongo.converters.UserRequestReader"/>
   <mongo:mapping-converter base-package="com.***">
    <mongo:custom-converters>
      <mongo:converter ref="readConverter"/>
      <mongo:converter>
        <bean class="com.***.mongo.converters.UserRequestWriter"/>
      </mongo:converter>
    </mongo:custom-converters>
  </mongo:mapping-converter>


  <!-- set the mapping converter to be used by the MongoTemplate -->
  <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
    <constructor-arg name="mongoDbFactory" ref="mongoDbFactory"/>
    <constructor-arg name="mongoConverter" ref="mappingConverter"/>
  </bean>

<!--   <bean class="org.springframework.data.mongodb.core.mapping.event.LoggingEventListener"/> -->

</beans>

追加：

1、上线时可能出现这样的异常

Caused by: com.mongodb.MongoWaitQueueFullException: Too many threads are already waiting for a connection. Max number of threads (maxWaitQueueSize) of50 has been exceeded.

…

原因是spring-data-mongo 版本比较旧，默认传给driver的最大连接池数，只有10，乘上因子（默认5），最大只能支持10*5=50个线程并发请求。方法也很简单,自定义maxPoolSize参数即可，比如定义为200，这样单个java进程可以支持200*5=1000个线程并发请求mongodb

mongodb://{userName}:{password}@{host1:port1},{host2:port2}/{dbname}?replicaSet={replicaSetName}&maxPoolSize=200

2、假如按照阿里云文档（iptable或者rinetd）配置外网访问

mongo uri改成mongodb://{userName}:{password}@{host1:port1}/{dbname}?maxPoolSize=200,去掉replicaSet参数，可以避免客户端将服务端ip转成内网，导致访问不了。

配置外网可访问，要注意主备切换会导致代理配置需要相应改动，建议仅仅用于测试环境。