Question

我正在使用 c3p0-0.9.1.2.jar 和 hibernate 3.2.1 。以下是hibernate配置。

    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/oDB</property>
    <property name="hibernate.connection.username">oDBUser</property>
    <property name="hibernate.connection.zeroDateTimeBehavior">convertToNull</property>
    <property name="hibernate.connection.autoReconnect">true</property>

    <property name="c3p0.max_size">10</property>
    <property name="c3p0.min_size">4</property>
    <property name="c3p0.timeout">1800</property>
    <property name="c3p0.max_statements">200</property>
    <property name="c3p0.maxStatementsPerConnection">5</property>
    <property name="c3p0.idle_test_period">1500</property>
    <property name="c3p0.acquire_increment">2</property>
    <property name="c3p0.testConnectionOnCheckout">true</property>
    <property name="c3p0.preferredTestQuery">SELECT 1</property>

但我认为像maxStatementsPerConnection，testConnectionOnCheckout和preferredTestQuery这样的参数在运行时没有任何影响。我应该为这些参数做些什么吗？这是我在日志中得到的内容。

INFO 2010-11-06 19：04：37,364初始化c3p0池... com.mchange.v2.c3p0.PoolBackedDataSource@e2da87d1 [connectionPoolDataSource - ＆gt; com.mchange.v2.c3p0.WrapperConnectionPoolDataSource@412cca1a [acquireIncrement - ＆gt; 2，acquireRetryAttempts - ＆gt; 30，acquireRetryDelay - ＆gt; 1000，autoCommitOnClose - ＆gt; false，automaticTestTable - ＆gt; null，breakAfterAcquireFailure - ＆gt; false，checkoutTimeout - ＆gt; 0，connectionCustomizerClassName - ＆gt; null，connectionTesterClassName - ＆gt; com.mchange.v2.c3p0.impl.DefaultConnectionTester，debugUnreturnedConnectionStackTraces - ＆gt; false，factoryClassLocation - ＆gt; null，forceIgnoreUnresolvedTransactions - ＆gt; false，identityToken - ＆gt; z8kfsx8c99kx7g8xqvs4 | 87400，idleConnectionTestPeriod - ＆gt; 1500，initialPoolSize - ＆gt; 4，maxAdministrativeTaskTime - ＆gt; 0，maxConnectionAge - ＆gt; 0，maxIdleTime - ＆gt; 1800，maxIdleTimeExcessConnections - ＆gt; 0，maxPoolSize - ＆gt; 10，maxStatements - ＆gt; 200， maxStatementsPerConnection - ＆gt; 0 ，minPoolSize - ＆gt; 4，nestedDataSource - ＆gt; com.mchange.v2.c3p0.DriverManagerDataSource@9d074b3f [description - ＆gt; null，driverClass - ＆gt; null，factoryClassLocation - ＆gt; null，identityToken - ＆gt; z8kfsx8c99kx7g8xqvs4 | b245dc，jdbcUrl - ＆gt; jdbc：mysql：// localhost：3306 / oDB，properties - ＆gt; {autoReconnect = true，user = * ，密码= * ，zeroDateTimeBehavior = convertToNull}]， preferredTestQuery - ＆gt; null ，propertyCycle - ＆gt; 0，testConnectionOnCheckin - ＆gt; false， testConnectionOnCheckout - ＆gt; false ，unreturnedConnectionTimeout - ＆gt; 0，usesTraditionalReflectiveProxies - ＆gt;假; userOverrides：{}]，dataSourceName - ＆gt; null，factoryClassLocation - ＆gt; null，identityToken - ＆gt; z8kfsx8c99kx7g8xqvs4 | 93c5e7，numHelperThreads - ＆gt; 3]

提前致谢。古拉

Answer 1

但我认为像maxStatementsPerConnection，testConnectionOnCheckout和preferredTestQuery这样的参数在运行时没有任何影响。我应该为这些参数做些什么吗？

他们没有进入Hibernate配置文件，您需要提供c3p0.properties文件。请参阅C3P0文档中的Appendix C: Hibernate-specific notes。

Hibernate c3p0配置参数在运行时不会受到影响

1 个答案: