四大流行的java连接池之BoneCP篇
BoneCP 是一个开源的快速的 JDBC 连接池。BoneCP很小，只有四十几K（运行时需要log4j和Google Collections的支持，这二者加起来就不小了），而相比之下C3P0 要六百多K。另外个人觉得 BoneCP 有个缺点是，JDBC驱动的加载是在连接池之外的，这样在一些应用服务器的配置上就不够灵活。
Bonecp是一个快速的，免费的，开放源代码的java数据库连接池资源库。
BoneCPConfig类可以用来手动设置连接池及其属性，
Class.forName("org.hsqldb.jdbcDriver"); // load the DB driver
BoneCPConfig config = new BoneCPConfig(); // create a new configuration object
config.setJdbcUrl("jdbc:hsqldb:mem:test"); // set the JDBC url
config.setUsername("sa"); // set the username
config.setPassword(""); // set the password
config.setXXXX(...); // (other config options here)
BoneCP connectionPool = new BoneCP(config); // setup the connection pool
Connection connection;
connection = connectionPool.getConnection(); // fetch a connection
... do something with the connection here ...
connection.close(); // close the connection
connectionPool.shutdown(); // close the connection pool
datasource格式创建连接池，
Class.forName("org.hsqldb.jdbcDriver"); // load the DB driver
BoneCPDataSource ds = new BoneCPDataSource(); // create a new datasource object
ds.setJdbcUrl("jdbc:hsqldb:mem:test"); // set the JDBC url
ds.setUsername("sa"); // set the username
ds.setPassword(""); // set the password
ds.setXXXX(...); // (other config options here)
Connection connection;
connection = ds.getConnection(); // fetch a connection
... do something with the connection here ...
connection.close(); // close the connection
ds.close(); // close the datasource pool
基于spring的代码，
Application Context
<!-- BoneCP configuration -->
<bean id="mainDataSource" class="com.jolbox.bonecp.BoneCPDataSource" destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl" value="jdbc:mysql://127.0.0.1/yourdb" />
<property name="username" value="root"/>
<property name="password" value="abcdefgh"/>
<property name="idleConnectionTestPeriod" value="60"/>
<property name="idleMaxAge" value="240"/>
<property name="maxConnectionsPerPartition" value="30"/>
<property name="minConnectionsPerPartition" value="10"/>
<property name="partitionCount" value="3"/>
<property name="acquireIncrement" value="5"/>
<property name="statementsCacheSize" value="100"/>
<property name="releaseHelperThreads" value="3"/>
</bean>
Code:
Make sure you define theclass below (either via explicit listing of the class name or via<component-scan>.
@Component
public class Foo {
@Autowired
DataSource ds;
public void testBoneCP() throws SQLException {
Connection connection = ds.getConnection();
System.out.println(connection); // do something with the connection here..
}
}
基于spring+hibernate的方式
<!-- Hibernate SessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate.LocalSessionFactoryBean" autowire="autodetect">
<property name="hibernateProperties">
<props>
<prop key="hibernate.connection.provider_class">com.jolbox.bonecp.provider.BoneCPConnectionProvider</prop>
<prop key="hibernate.connection.driver_class">com.mysql.jdbc.Driver</prop>
<prop key="hibernate.connection.url">jdbc:mysql://127.0.0.1/yourdb</prop>
<prop key="hibernate.connection.username">root</prop>
<prop key="hibernate.connection.password">abcdefgh</prop>
<prop key="bonecp.idleMaxAge">240</prop>
<prop key="bonecp.idleConnectionTestPeriod">60</prop>
<prop key="bonecp.partitionCount">3</prop>
<prop key="bonecp.acquireIncrement">10</prop>
<prop key="bonecp.maxConnectionsPerPartition">60</prop>
<prop key="bonecp.minConnectionsPerPartition">20</prop>
<prop key="bonecp.statementsCacheSize">50</prop>
<prop key="bonecp.releaseHelperThreads">3</prop>
</props>
</property>
</bean>
基于spring+lazydatasource的方式，
<!-- Hibernate SessionFactory -->
<bean id="sessionFactory" class="..." autowire="autodetect">
<!-- Tell hibernate to use our given datasource -->
<property name="dataSource" ref="dataSource" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">...</prop>
...
</props>
</property>
</bean>
<!-- Spring bean configuration. Tell Spring to bounce off BoneCP -->
<bean id="dataSource"
class="org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy">
<property name="targetDataSource">
<ref local="mainDataSource" />
</property>
</bean>
<!-- BoneCP configuration -->
<bean id="mainDataSource" class="com.jolbox.bonecp.BoneCPDataSource" destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl" value="jdbc:mysql://127.0.0.1/yourdb" />
<property name="username" value="root"/>
<property name="password" value="abcdefgh"/>
<property name="idleConnectionTestPeriod" value="60"/>
<property name="idleMaxAge" value="240"/>
<property name="maxConnectionsPerPartition" value="60"/>
<property name="minConnectionsPerPartition" value="20"/>
<property name="partitionCount" value="3"/>
<property name="acquireIncrement" value="10"/>
<property name="statementsCacheSize" value="50"/>
<property name="releaseHelperThreads" value="3"/>
</bean>
Jdbc example
The full source code of this example project can befound here:
- examplejdbc-1.0.0-project.tar.bz2
- examplejdbc-1.0.0-project.zip
- examplejdbc-1.0.0-project.tar.gz
You will need Apache Maven to automatically includethe required jar files into your classpath. Alternatively you may add therequired JAR files manually.
package com.jolbox;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import com.jolbox.bonecp.BoneCP;
import com.jolbox.bonecp.BoneCPConfig;
/** A test project demonstrating the use of BoneCP in a JDBCenvironment.
* @author wwadge
*
*/
public class ExampleJDBC {
/** Start test
* @param args none expected.
*/
public static voidmain(String[] args) {
BoneCPconnectionPool = null;
Connectionconnection = null;
try {
// load thedatabase driver (make sure this is in your classpath!)
Class.forName("org.hsqldb.jdbcDriver");
} catch (Exceptione) {
e.printStackTrace();
return;
}
try {
// setup theconnection pool
BoneCPConfigconfig = new BoneCPConfig();
config.setJdbcUrl("jdbc:hsqldb:mem:test");// jdbc url specific to your database, eg jdbc:mysql://127.0.0.1/yourdb
config.setUsername("sa");
config.setPassword("");
config.setMinConnectionsPerPartition(5);
config.setMaxConnectionsPerPartition(10);
config.setPartitionCount(1);
connectionPool= new BoneCP(config); // setup the connection pool
connection =connectionPool.getConnection(); // fetch a connection
if(connection != null){
System.out.println("Connectionsuccessful!");
Statementstmt = connection.createStatement();
ResultSet rs =stmt.executeQuery("SELECT 1 FROM INFORMATION_SCHEMA.SYSTEM_USERS");// do something with the connection.
while(rs.next()){
System.out.println(rs.getString(1));// should print out "1"'
}
}
connectionPool.shutdown();// shutdown connection pool.
} catch(SQLException e) {
e.printStackTrace();
} finally {
if(connection != null) {
try{
connection.close();
}catch (SQLException e) {
e.printStackTrace();
}
}
}
}
}
If you use Maven, the following should besufficient to pull in the JAR files required into your classpath:
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.jolbox</groupId>
<artifactId>examplejdbc</artifactId>
<name>Example JDBCProject</name>
<version>1.0.0</version>
<description>ExampleJDBC project</description>
<dependencies>
<dependency>
<groupId>com.jolbox</groupId>
<artifactId>bonecp</artifactId>
<version>0.6.5</version>
<scope>compile</scope>
</dependency>
<!-- This is the HSQLDBdatabase in use by this test. Replace with MySQL, PostgreSQL etc here if youwish. -->
<dependency>
<groupId>hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>1.8.0.10</version>
<scope>compile</scope>
</dependency>
</dependencies>
<repositories>
<repository>
<releases>
<enabled>true</enabled>
</releases>
<id>bonecp-repo</id>
<name>BoneCPRepository</name>
<url>http://jolbox.com/bonecp/downloads/maven</url>
</repository>
</repositories>
</project>