Examples of org.apache.commons.pool.impl.GenericKeyedObjectPool.borrowObject()

Class org.apache.commons.pool.impl.GenericKeyedObjectPool

Examples of org.apache.commons.pool.impl.GenericKeyedObjectPool.borrowObject()

org.apache.commons.pool.impl.GenericKeyedObjectPool.borrowObject()

Borrows an object from the keyed pool associated with the given key.

If there is an idle instance available in the pool associated with the given key, then either the most-recently returned (if {@link #getLifo() lifo} == true) or "oldest" (lifo == false)instance sitting idle in the pool will be activated and returned. If activation fails, or {@link #getTestOnBorrow() testOnBorrow} is set to true and validation fails, the instance is destroyed and thenext available instance is examined. This continues until either a valid instance is returned or there are no more idle instances available.

If there are no idle instances available in the pool associated with the given key, behavior depends on the {@link #getMaxActive() maxActive}, {@link #getMaxTotal() maxTotal}, and (if applicable) {@link #getWhenExhaustedAction() whenExhaustedAction} and {@link #getMaxWait() maxWait} properties. If thenumber of instances checked out from the pool under the given key is less than maxActive and the total number of instances in circulation (under all keys) is less than maxTotal, a new instance is created, activated and (if applicable) validated and returned to the caller.

If the associated keyed pool is exhausted (no available idle instances and no capacity to create new ones), this method will either block ( {@link #WHEN_EXHAUSTED_BLOCK}), throw a NoSuchElementException ( {@link #WHEN_EXHAUSTED_FAIL}), or grow ( {@link #WHEN_EXHAUSTED_GROW} - ignoring maxActive, maxTotal properties).The length of time that this method will block when whenExhaustedAction == WHEN_EXHAUSTED_BLOCK is determined by the {@link #getMaxWait() maxWait} property.
When the pool is exhausted, multiple calling threads may be simultaneously blocked waiting for instances to become available. As of pool 1.5, a "fairness" algorithm has been implemented to ensure that threads receive available instances in request arrival order.
@param key pool key @return object instance from the keyed pool @throws NoSuchElementException if a keyed object instance cannot be returned.

            PerformanceTest test = new PerformanceTest() {


                @Override
                public void doOperation(int id) throws Exception {
                    Integer key = id % numKeys;
                    String s = (String) pool.borrowObject(key);
                    pool.returnObject(key, s);
                }
            };
            test.run(numRequests, numThreads);
            test.printStats();

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      InetSocketAddress address = new InetSocketAddress("127.0.0.1", hotRodServer.getPort());


      assertEquals(0, keyedObjectPool.getNumActive(address));
      assertEquals(1, keyedObjectPool.getNumIdle(address));


      TcpTransport tcpConnection = (TcpTransport) keyedObjectPool.borrowObject(address);
      keyedObjectPool.returnObject(address, tcpConnection);//now we have a reference to the single connection in pool


      tcpConnection.destroy();


      assertEquals("v", rc.get("k"));

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      assertEquals("v", rc.get("k"));
      assertEquals(0, keyedObjectPool.getNumActive(address));
      assertEquals(1, keyedObjectPool.getNumIdle(address));


      TcpTransport tcpConnection2 = (TcpTransport) keyedObjectPool.borrowObject(address);


      assert tcpConnection2.getId() != tcpConnection.getId();
   }


}

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        KeyedCPDSConnectionFactory factory = 
            new KeyedCPDSConnectionFactory(cpds, pool, null, false);
        
        // Checkout a pair of connections
        PooledConnection pcon1 = 
            ((PooledConnectionAndInfo) pool.borrowObject(key))
                .getPooledConnection();
        Connection con1 = pcon1.getConnection();
        PooledConnection pcon2 = 
            ((PooledConnectionAndInfo) pool.borrowObject(key))
                .getPooledConnection();

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        PooledConnection pcon1 = 
            ((PooledConnectionAndInfo) pool.borrowObject(key))
                .getPooledConnection();
        Connection con1 = pcon1.getConnection();
        PooledConnection pcon2 = 
            ((PooledConnectionAndInfo) pool.borrowObject(key))
                .getPooledConnection();
        assertEquals(2, pool.getNumActive(key));
        assertEquals(0, pool.getNumIdle(key));
        
        // Verify listening

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        assertEquals(0, pool.getNumIdle(key));
        
        // Ask for another connection - should trigger makeObject, which causes
        // cleanup, removing listeners.
        PooledConnection pcon3 = 
            ((PooledConnectionAndInfo) pool.borrowObject(key))
                .getPooledConnection();
        assertTrue(!pcon3.equals(pcon1)); // better not get baddie back
        assertTrue(!pc.getListeners().contains(factory)); // verify cleanup
        assertEquals(2, pool.getNumActive(key));
        assertEquals(0, pool.getNumIdle(key));

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      InetSocketAddress address = new InetSocketAddress("127.0.0.1", hotRodServer.getPort());


      assertEquals(0, keyedObjectPool.getNumActive(address));
      assertEquals(1, keyedObjectPool.getNumIdle(address));


      TcpTransport tcpConnection = (TcpTransport) keyedObjectPool.borrowObject(address);
      keyedObjectPool.returnObject(address, tcpConnection);//now we have a reference to the single connection in pool


      tcpConnection.destroy();


      assertEquals("v", rc.get("k"));

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      assertEquals("v", rc.get("k"));
      assertEquals(0, keyedObjectPool.getNumActive(address));
      assertEquals(1, keyedObjectPool.getNumIdle(address));


      TcpTransport tcpConnection2 = (TcpTransport) keyedObjectPool.borrowObject(address);


      assert tcpConnection2.getId() != tcpConnection.getId();
   }


}

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