#108 Consistent package naming throughout the examples
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object-pool/src/main/java/com/iluwatar/object/pool/App.java
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45
object-pool/src/main/java/com/iluwatar/object/pool/App.java
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package com.iluwatar.object.pool;
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/**
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*
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* When it is necessary to work with a large number of objects that are particularly expensive to instantiate
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* and each object is only needed for a short period of time, the performance of an entire application may be
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* adversely affected. An object pool design pattern may be deemed desirable in cases such as these.
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*
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* The object pool design pattern creates a set of objects that may be reused. When a new object is needed, it
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* is requested from the pool. If a previously prepared object is available it is returned immediately, avoiding
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* the instantiation cost. If no objects are present in the pool, a new item is created and returned. When the
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* object has been used and is no longer needed, it is returned to the pool, allowing it to be used again in the
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* future without repeating the computationally expensive instantiation process. It is important to note that
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* once an object has been used and returned, existing references will become invalid.
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*
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* In this example we have created OliphauntPool inheriting from generic ObjectPool. Oliphaunts can be checked
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* out from the pool and later returned to it. The pool tracks created instances and their status (available,
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* inUse).
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*
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*/
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public class App {
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public static void main( String[] args ) {
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OliphauntPool pool = new OliphauntPool();
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System.out.println(pool);
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Oliphaunt oliphaunt1 = pool.checkOut();
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System.out.println("Checked out " + oliphaunt1);
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System.out.println(pool);
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Oliphaunt oliphaunt2 = pool.checkOut();
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System.out.println("Checked out " + oliphaunt2);
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Oliphaunt oliphaunt3 = pool.checkOut();
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System.out.println("Checked out " + oliphaunt3);
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System.out.println(pool);
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System.out.println("Checking in " + oliphaunt1);
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pool.checkIn(oliphaunt1);
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System.out.println("Checking in " + oliphaunt2);
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pool.checkIn(oliphaunt2);
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System.out.println(pool);
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Oliphaunt oliphaunt4 = pool.checkOut();
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System.out.println("Checked out " + oliphaunt4);
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Oliphaunt oliphaunt5 = pool.checkOut();
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System.out.println("Checked out " + oliphaunt5);
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System.out.println(pool);
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}
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}
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