c3p0

Property Preferredtestquery will be ignored. You cannot do anything on this test sheet, it will be for C3P0 testing only Use. Default:null--> Reserved and continue trying to get the connection the next time you call Getconnection (). If set to true, then try to When a connection failure is obtained, the data source declares that it has been fractured and closed permanently. Default:false--> SQLException, if set to 0, waits indefinitely. Unit milli

1. Again properties configuration file configuration: c3p0.jdbcurl=jdbc:mysql://localhost:3306/test?useunicode=truecharacterencoding=utf8autoreconnect= Truefailoverreadonly=falseC3p0.user=rootc3p0.password=20140813C3p0.driverclass=com.mysql.jdbc.driverc3p0.minpoolsize=2c3p0.maxpoolsize=10c3p0.maxidletime=1800000C3p0.acquireincrement=3c3p0.maxstatements=1000C3p0.initialpoolsize=3C3p0.idleconnectiontestperiod=60C3p0.acquireretryattempts=30c3p0.acquirer

Tags: spring-use configuration file to complete JdbcTemplate operation database-c3p0First, create a spring projectProject Name: spring101302Ii. adding a jar package to the project1. Create a Lib directory in your project/lib2. Add spring support under the Lib directoryCommons-logging.jarJunit-4.10.jarLog4j.jarMysql-connector-java-5.1.18-bin.jarSpring-beans-3.2.0.release.jarSpring-context-3.2.0.release.jarSpring-core-3.2.0.release.jarSpring-expression-3.2.0.release.jarSpring-jdbc-3.2.0.release.ja

Application jar:Note the JDBC configuration driver and URL methods:Class.forName ("Com.microsoft.jdbc.sqlserver.SQLServerDriver"); String url= "Jdbc:microsoft:sqlserver://localhost:1433;databasename=test";If you connect using C3P0, the configuration in properties is:Jdbcdriver = COM.MICROSOFT.SQLSERVER.JDBC.SQLSERVERDRIVERJDBCURL = Jdbc:sqlserver://localhost:1433;databasename= TestAt this point, the plug-in configuration mode in Jfinal:C3p0plugin c3p0

ETL tools completed almost, today, encountered a problem, is to C3p0 configured maxpoolsize for 10, the purpose is to let the entire application at the same time to obtain the maximum number of connection is 10, but after testing this part of the application, There are far more than 10 links found on the PostgreSQL side. Because the tool is multi-threaded, so I think, is not a multi-threaded problem, check the number of connection, it is indeed the nu

Reproduced from: http://japi.iteye.com/blog/254786 Thank the original authorThere have been a lot of errors in the use of c3p0. The longest sight is a deadlock, which occupies a relatively large resource.For deadlock problems http://japi.iteye.com/blog/243702. Found the solution (not fully guaranteed, but in the load test, there are no problems)The key to the problem is the setting of the parameterReferencebelong to a single connection rather than th

Tags: sharding first come ROM features tor mid-large number usage performance improvementMainstream database connection poolCommon open source database connection pools are c3p0, DBCP, Tomcat Jdbc pool, BONECP, druid, etc.C3P0: Open source JDBC Connection pool, which implements the data source and Jndi bindings, supports the standard extension of the JDBC3 specification and JDBC2. The open source projects that currently use it are hibernate, spring, a

Tags: span commit sys OTA LIMIT mini CDATA Fetch number AutoFirst, C3P0 Public classConnectionManager { Public StaticCombopooleddatasource DataSource; Static { Try{DataSource=NewCombopooleddatasource (); Datasource.setuser ("FreeSWITCH"); Datasource.setpassword ("FreeSWITCH"); Datasource.setjdbcurl ("jdbc:postgresql://Database Address: Database Port/freeswitch"); Datasource.setdriverclass ("Org.postgresql.Driver"); Datasource.setinitialpoolsi

Tags: style blog http ar color SP data on divProject is b/s mode, placed on a Linux server, Tomcat and oracle11g on a server, Tomcat read database using C3P0 connection pool, has been relatively stable, so there is no pipe. Later, the Tomcat was placed under one win2008 and the database was placed under another win2008. Run for more than half a month, during the regular Report database connection error, but refresh the next page is also good. Because

Label:Package COM.ATGUIGU.JDBC; Import java.io.IOException;Import Java.io.InputStream;Import java.sql.Connection;Import Java.sql.DriverManager;Import java.sql.PreparedStatement;Import Java.sql.ResultSet;Import java.sql.SQLException;Import java.sql.Statement;Import java.util.Properties; Import Javax.sql.DataSource; Import Com.mchange.v2.c3p0.ComboPooledDataSource; public class Jdbctools { Processing of database transactionsCommit a transactionpublic st

Perac =(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP) (HOST = 131.197.17.137) (PORT = 1521))(ADDRESS = (PROTOCOL = TCP) (HOST = 131.197.17.138) (PORT = 1521))(load_balance = yes)(FAILOVER = ON)(Connect_data =(SERVER = dedicated)(service_name = PE)(Failover_mode =(TYPE = SELECT)(METHOD = BASIC)(retries=180)(delay=5)))) It is very simple for me to configure this string connection in the program. Just put this string above the URL tag that previously placed only one URL connection. The previous configur

1. Import Package: C3P0 and Mchange Package2, the Code implementation method:1 PackageHelloworld.pools;2 3 ImportCom.mchange.v2.c3p0.ComboPooledDataSource;4 Importorg.springframework.jdbc.core.JdbcTemplate;5 Importjava.beans.PropertyVetoException;6 7 /**8 * C3P0 Connection Pool Usage Method-code9 * Import Package: C3P0