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NameTransformer to the value com. DataSources , and wish to use a non-default configuration, you can supply a Map of property names beginning with lower-case letters to property values either as Strings or "boxed" Java primitives like Integer or Boolean. Eventually, the pool grows to maxPoolSize , and then runs out of Connections, because of these bad clients. Statement pooling, ConnectionCustomizers , and many c3p0-specific properties are unsupported with third party implementations of ConnectionPoolDataSource. So if you're seeing these messages, increasing numHelperThreads and setting maxAdministrativeTaskTime might help.

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Milliseconds, time c3p0 will wait between acquire attempts.

in lib – ccm

If you obtain a DataSource by using factory methods of the utility class com. Maximum time in seconds before user configuration constraints are enforced. C3P0 does provide an API that allows you to invoke non-standard methods reflectively on an underlying Connection.

This is intended to debug applications with Connection leaks, that is applications that occasionally fail to return Connections, leading to pool growth, and eventually exhaustion jdb3c the pool hits maxPoolSize with all Connections checked-out and lost. jbdc3

Log of /tags/0.7.4/examples/java/postgresql-8.1-412.jdbc3.jar

If you wish c3p0 to allow unresolved transactional work to commit on checkin, set autoCommitOnClose to jdbd3. C3P0's default policy is to rollback any uncommitted, pending work.

Hibernate's C3P0ConnectionProvider renames 7 c3p0 configuration properties, which, if set in your hibernate configuration, will override any configuration you may have set in a c3p0. Defines the query that will mdbc3 executed for all connection tests, if the default ConnectionTester or some other implementation of QueryConnectionTesteror better yet FullQueryConnectionTester is being used.

org/postgresql/postgresql/9.2-1004-jdbc3

Otherwise setting this to true is just a bad idea. Timer threadsand does so lazily in response to the first client request experienced by a PooledDataSource. The type will always be PooledDataSource. Zero means idle connections never expire.

You can always set c3p0 config in a c3p0.

This has the advantage of being very robust and working with any database, regardless of the database schema. The new, non-reflexive implementation is faster, and has now been widely deployed and jvbc3, so it is unlikely that this parameter jfbc3 be useful. See Appendix A for details. You may also want to set user and passwordand, if you use an old-style JDBC driver that you will not externally preload, you should set the driverClass.

Copyright by Javin Paul If false, failure to obtain a Connection will cause all Threads waiting for the pool to acquire a Connection to throw an Exception, but the DataSource will remain valid, and will attempt to acquire again following a call to getConnection.

If true, a pooled DataSource will declare itself broken and be permanently closed if a Connection cannot be obtained from the database after making acquireRetryAttempts to acquire one.

For example, using ComboPooledDataSource:. Applications that use ComboPooledDataSourceor that wrap any c3p0-implemented unpooled DataSource can use the simple user property.

See Locating Configuration Information. Expanding numHelperThreads can help manage Thread kar congestion, but memory footprint and switching costs put limits on practical thread pool size.

Index of /webdav/geotools/postgresql/postgresql/jdbc3/

Obviously, if a non-zero value is set, it should be to a value longer than any Connection should reasonably be checked-out. By default, each DataSource has only three associated helper threads. If, however, some of these tasks "hang", that is they neither succeed nor fail with an Exception for a prolonged period of time, c3p0's thread pool can become exhausted and administrative tasks backed up. Is it better to be beautiful or correct?

If you are using named configurationsyou can specify the configuration that defines the default configuration for your DataSource:. Once a full round of acquisition attempts fails, there are two possible policies.

In particular, c3p0 provides several useful services: Mdbc3 right way to address this problem is to fix the client application. The overhead of Statement pooling is too high. ConnectionCustomizers can be configured via user-defined configuration extensions. As long as you neither perform Connection tests on check-in see testConnectionOnCheckin nor perform database operations or other slow work in ConnectionCustomizer.

Though this hypothetical issue has never been reported in practice, c3p0 resolves it by prepending a VMID to its identity tokens.