Examples of org.apache.commons.pool.ObjectPool.borrowObject()

Class org.apache.commons.pool.ObjectPool

Examples of org.apache.commons.pool.ObjectPool.borrowObject()

org.apache.commons.pool.ObjectPool.borrowObject()
Obtain an instance from my pool. By contract, clients MUST return the borrowed instance using {@link #returnObject(java.lang.Object) returnObject}or a related method as defined in an implementation or sub-interface.
The behaviour of this method when the pool has been exhausted is not specified (although it may be specified by implementations). @return an instance from my pool.

        SelectiveFactory factory = new SelectiveFactory();
        ObjectPool pool = new StackObjectPool(factory, 20);


        Object[] obj = new Object[10];
        for(int i=0;i<10;i++) {
            obj[i] = pool.borrowObject();
            assertEquals("Each time we borrow, get one more active.", i+1, pool.getNumActive());
            
        }
        
        factory.setValidateSelectively(true);  // Even numbers fail validation

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    public void testReturnObjectDiscardOrder() throws Exception {
        SelectiveFactory factory = new SelectiveFactory();
        ObjectPool pool = new StackObjectPool(factory, 3);


        // borrow more objects than the pool can hold
        Integer i0 = (Integer)pool.borrowObject();
        Integer i1 = (Integer)pool.borrowObject();
        Integer i2 = (Integer)pool.borrowObject();
        Integer i3 = (Integer)pool.borrowObject();


        // tests

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        SelectiveFactory factory = new SelectiveFactory();
        ObjectPool pool = new StackObjectPool(factory, 3);


        // borrow more objects than the pool can hold
        Integer i0 = (Integer)pool.borrowObject();
        Integer i1 = (Integer)pool.borrowObject();
        Integer i2 = (Integer)pool.borrowObject();
        Integer i3 = (Integer)pool.borrowObject();


        // tests
        // return as many as the pool will hold.

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        ObjectPool pool = new StackObjectPool(factory, 3);


        // borrow more objects than the pool can hold
        Integer i0 = (Integer)pool.borrowObject();
        Integer i1 = (Integer)pool.borrowObject();
        Integer i2 = (Integer)pool.borrowObject();
        Integer i3 = (Integer)pool.borrowObject();


        // tests
        // return as many as the pool will hold.
        pool.returnObject(i0);

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        // borrow more objects than the pool can hold
        Integer i0 = (Integer)pool.borrowObject();
        Integer i1 = (Integer)pool.borrowObject();
        Integer i2 = (Integer)pool.borrowObject();
        Integer i3 = (Integer)pool.borrowObject();


        // tests
        // return as many as the pool will hold.
        pool.returnObject(i0);
        pool.returnObject(i1);

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        ObjectPool pool = new StackObjectPool(factory);
        pool.addObject();
        pool.addObject();
        factory.setThrowOnActivate(true);
        try {
            pool.borrowObject();
            fail("Expecting NoSuchElementException");
        } catch (NoSuchElementException ex) {
            // expected
        }
        assertEquals(0, pool.getNumIdle());

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        }
        assertEquals(2, pool.getNumIdle());
        
        Object[] objects = new Object[3];
        for (int i = 0; i < 3; i++) {
            objects[i] = pool.borrowObject();
        }
        for (int i = 0; i < 3; i++) {
            pool.returnObject(objects[i]); // Third triggers destroy
        } 
        assertEquals(2, pool.getNumIdle());

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            assertEquals(0, ex.getValue());
        }
        assertEquals(0, pool.getNumIdle());
        
        // returnObject swallows 
        Object obj = pool.borrowObject();
        pool.returnObject(obj);
        assertEquals(0, pool.getNumIdle());
    }
    
    /**

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        }
        assertEquals(0, pool.getNumIdle());
        
        // returnObject 
        factory.setThrowOnValidate(false);
        Object obj = pool.borrowObject();
        factory.setThrowOnValidate(true);
        try {
            pool.returnObject(obj);
            fail("Expecting IntegerFactoryException");
        } catch (IntegerFactoryException ex) {

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        }
        assertEquals(0, pool.getNumIdle());
        
        // borrowObject - throws NoSuchElementException
        try {
            pool.borrowObject();
            fail("Expecting NoSuchElementException");
        } catch (NoSuchElementException ex) {
            // Expected
        }
    }

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