Java_ connection pool, DataSource, JNDI

1. Connection Pool
The acquisition and opening of connection is a costly process, and the solution to this problem is connection pooling.
Connection pool is to obtain a certain number of connection in advance, the process of processing is not a new connection, but to obtain a pre-prepared connection right to use.

2, DataSource
The technique of providing connection pooling function is called DataSource:Javax.sql.DataSource
The generic Web server is provided. Like Tomcat5.5.
DataSource can be obtained from new, but is usually obtained through JNDI with lookup.

3. JNDI (Java naming and Directory Interface)
Java Naming and Directory Service Interfaces (Java naming and directory Interface,jndi).
Naming Service: An advanced version of the map that can be likened to the session attribute. Implements, obtains, and logs in the object that specifies the name. The generic Web server is provided.
Directory services: Similar to named services, but the management of objects is hierarchical.

Objects that are logged in the naming service can be obtained using lookup ().

Java_ connection pool, DataSource, JNDI