What is generic object pool?

What is generic object pool?

When coupled with the appropriate PooledObjectFactory , GenericObjectPool provides robust pooling functionality for arbitrary objects. Optionally, one may configure the pool to examine and possibly evict objects as they sit idle in the pool and to ensure that a minimum number of idle objects are available.

What is Commons pool2?

commons. pool2 package defines a handful of pooling interfaces and some base classes that may be useful when creating new pool implementations.

What is GenericObjectPoolConfig?

public class GenericObjectPoolConfig extends BaseObjectPoolConfig A simple “struct” encapsulating the configuration for a GenericObjectPool . This class is not thread-safe; it is only intended to be used to provide attributes used when creating a pool.

What is object pooling in Java?

An object pool is a collection of a particular object that an application will create and keep on hand for those situations where creating each instance is expensive. A good example would be a database connection or a worker thread. The pool checks instances in and out for users like books out of a library.

What is instance pooling in Java?

How do you create a connection pool?

Let’s have a look at below steps to initialize connection pool.

1. Create an instance of BasicDataSource.
2. Specify JDBC Url, database username and password.
3. Specify the minimum number of idle connection ( Minimum number of connections that needs to remain in the pool at any time)

How do you create a pool in Java?

Implementation of above UML:

1. Create an ObjectPool class that is used to create the number of objects. File: ObjectPool.java.
2. Create an ExportingProcess class that will be used by ExportingTask class.
3. Create an ExportingTask class that will use ExportingProcess and ObjectPool class.
4. Create an ObjectPoolDemo class.
5. Output.

What does a validator do?

A validator is a computer program used to check the validity or syntactical correctness of a fragment of code or document. The term is commonly used in the context of validating HTML, CSS, and XML documents like RSS feeds, though it can be used for any defined format or language.

What is pool nosuchelementexception?

NoSuchElementException – when the pool is exhausted and cannot or will not return another instance. Borrows an object from the pool using the specific waiting time which only applies if BaseGenericObjectPool.getBlockWhenExhausted () is true.

How to return a borrowed object from an objectpool?

By contract, clients must return the borrowed instance using ObjectPool.returnObject (T), ObjectPool.invalidateObject (T), or a related method as defined in an implementation or sub-interface. The behavior of this method when the pool has been exhausted is not strictly specified (although it may be specified by implementations).

How do I evict an idle object from an object pool?

Optionally, one may configure the pool to examine and possibly evict objects as they sit idle in the pool and to ensure that a minimum number of idle objects are available. This is performed by an “idle object eviction” thread, which runs asynchronously.