c3p0

How good is Oracle Universal Connection Pool (UCP)

由 守給你的承諾、 提交于 2019-11-27 04:22:01
问题 Does anybody have experience with using Oracle UCP under real production load? Does it handle database reconnects well? Are there any multi-threading issues? Has anybody compared it with C3P0 or Apache DBCP? 回答1: I evaluated UCP 11.2.0.1 as a replacement for our legacy connection pool and I cannot recommend it : it does not fully support jdk 6 / ojdbc6.jar. For example the use of statement caching and jmx-support does not work with java 6 and throws exceptions. no internal statement cache -

How to monitor c3p0 connections

由 风流意气都作罢 提交于 2019-11-27 04:16:55
I am using Hibernate in my JBoss war, using c3p0 for connection pooling, both configured within a hibernate.cfg.xml config file in my classpath <property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property> I've seen server.log generates lines with interesting information about the connection pool: DEBUG [com.mchange.v2.resourcepool.BasicResourcePool] trace com.mchange.v2.resourcepool.BasicResourcePool@63f5e4b6 [managed: 10, unused: 9, excluded: 0] For my monitoring pool (I am using nagios) I'd like to provide a JSP telling how many connections are being

Hibernate : closing the session factory does not close the c3p0 connection pool

由 别等时光非礼了梦想. 提交于 2019-11-27 02:22:16
问题 I recently started using hibernate along with c3p0 as the ORM in my application. However, when I close the session factory, the connection pool does not close itself! This is the one and only place in my application where I do anything with a session. StatelessSession session = null; Transaction transaction = null; try { session = sessionFactory.openStatelessSession(); transaction = session.beginTransaction(); List<Thingy> list = session.getNamedQuery("getAvailableThingy").list(); transaction

how do I turn off logging in java c3p0 connection pooling lib?

由 别来无恙 提交于 2019-11-27 01:35:01
问题 hey all, I'm just getting started with c3p0 for database connection pooling. It's attaching itself to my log4j output currently. How do I set logging off or at least to SEVERE level only for c3p0? I tried tweaking the properties file but not sure it's being picked up properly. any ideas on how best to turn it off? thanks UPDATE: this seems to work in the log4j.properties file log4j.logger.com.mchange.v2.c3p0.impl=INFO log4j.logger.com.mchange=INFO 回答1: If you use a log4j.xml file you can

hibernate connection pool

由 不想你离开。 提交于 2019-11-27 00:04:05
问题 I can't seem to get hibernate to use c3p0 for connection pooling, it says 12:30:35,038 INFO DriverManagerConnectionProvider:64 - Using Hibernate built-in connection pool (not for production use!) 12:30:35,038 INFO DriverManagerConnectionProvider:65 - Hibernate connection pool size: 20 Hibernate Config: <hibernate-configuration> <session-factory> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql://localhost

What are the required C3P0 settings for hibernate in order to avoid Deadlocks

由 ☆樱花仙子☆ 提交于 2019-11-26 23:56:49
问题 I use Hibernate together with MySQL 5.1.30. I have the next libraries: c3p0-0.0.1.2.jar mysql-connector-java-5.0.3-bin.jar hibernate3.jar I use a hibernate.cfg.xml for configuration: <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- Database connection settings --> <property name="connection.driver_class">org.gjt.mm.mysql.Driver<

Manage Connection Pooling in multi-tenant web app with Spring, Hibernate and C3P0

由 て烟熏妆下的殇ゞ 提交于 2019-11-26 22:31:04
问题 I'm trying to setup a multi-tenant web application, with (ideally) possibility for both Database-separated and Schema-separated approach at the same time. Although I'm going to start with Schema separation. We're currently using: Spring 4.0.0 Hibernate 4.2.8 Hibernate-c3p0 4.2.8 (which uses c3p0-0.9.2.1) and PostgreSQL 9.3 (which I doubt it really matters for the overall architecture) Mostly I followed this thread (because of the solution for @Transactional ). But I'm kinda lost in

Java JDBC connection pool library choice in 2011/2012?

由 拟墨画扇 提交于 2019-11-26 21:25:22
Which JDBC connection pool library should I use for a new application project (not web application)? Apache DBCP has enough unresolved issues which are pushed until 2.0 I think. C3P0 development seems to be stopped. And both of them looks relatively slow . Proxool is dead. DBPool has almost no community (at least I've found no public one - no forums, no mailing lists...) Apache Tomcat Pool looks to be unusable without Tomcat I've found SQL Datasources article at Oracle website, but it seems, that it can be applied only to applets running in containers like servlets and web services. Should I

数据库连接池

由 送分小仙女□ 提交于 2019-11-26 20:58:08
## 数据库连接池 1. 概念：其实就是一个容器(集合)，存放数据库连接的容器。 当系统初始化好后，容器被创建，容器中会申请一些连接对象，当用户来访问数据库时，从容器中获取连接对象，用户访问完之后，会将连接对象归还给容器。 2. 好处： 1. 节约资源 2. 用户访问高效 3. 实现： 1. 标准接口：DataSource （javax.sql包下） 1. 方法： * 获取连接：getConnection() * 归还连接：Connection.close()。如果连接对象Connection是从连接池中获取的，那么调用Connection.close()方法，则不会再关闭连接了。而是归还连接 2. 一般我们不去实现它，由数据库厂商来实现 1. C3P0：数据库连接池技术 2. Druid：数据库连接池实现技术，由阿里巴巴提供的 4. C3P0：数据库连接池技术 * 步骤： 1. 导入jar包 (两个) c3p0-0.9.5.2.jar mchange-commons-java-0.2.12.jar ， * 不要忘记导入数据库驱动jar包 2. 定义配置文件： * 名称： c3p0.properties 或者 c3p0-config.xml 1 package cn.ftt.datasource.c3p0; 2 3 import com.mchange.v2.c3p0

What is the benefit of Connection and Statement Pooling?

由 丶灬走出姿态 提交于 2019-11-26 19:37:44
问题 Can someone explain what is Connection and Statement Pooling and what is the benefit over unpooled DataSources? I am trying to understand when it is a good idea to use a technology like c3p0 or proxool in a project. I need first to understand what they do and when it interesting to use them. Thank you very much. 回答1: The Happy Connection It's so easy to create a new connection every time. One line: that's all it takes. Nothing much to think about. Great life. Hold on. Do you eat on a plate?
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