Example usage for org.apache.commons.pool.impl GenericObjectPool getNumIdle

Introduction

In this page you can find the example usage for org.apache.commons.pool.impl GenericObjectPool getNumIdle.

Prototype

public synchronized int getNumIdle() 

Source Link

Document

Return the number of instances currently idle in this pool.

Usage

From source file:TestObjectPool.java

 public static void main(String args[]) throws Exception {

   GenericObjectPool pool = new GenericObjectPool();
   pool.setFactory(new EmployeeFactory());

   /*First way of initializing pool
   pool.setMinIdle(5);// w  ww .  j  a  v a  2s.co m
   pool.setTimeBetweenEvictionRunsMillis(500);
   Thread.currentThread().sleep(600);*/

   /* second, and preferred way */
   for(int i = 0; i < 5; ++i) {
      pool.addObject();
   }

   // pool.setTestOnReturn(true);
   pool.setMinEvictableIdleTimeMillis(1000);
   pool.setTimeBetweenEvictionRunsMillis(600);

   System.err.println("Number of employees in pool: " + pool.getNumIdle());

     Thread.currentThread().sleep(1500);

   Employee employee = (Employee)pool.borrowObject();

   employee.setName("Fred Flintstone");
   employee.doWork();

   System.err.println("Employee: "  + employee);

   pool.returnObject(employee);

     System.err.println("Number of employees in pool: " + pool.getNumIdle());
}

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From source file:DBCPDemo.java

public static void main(String args[]) throws Exception {

    // create a generic pool
    GenericObjectPool pool = new GenericObjectPool(null);

    // use the connection factory which will wraped by
    // the PoolableConnectionFactory
    DriverManagerConnectionFactory cf = new DriverManagerConnectionFactory(
            "jdbc:jtds:sqlserver://myserver:1433/tandem", "user", "pass");

    PoolableConnectionFactory pcf = new PoolableConnectionFactory(cf, pool, null, "SELECT * FROM mysql.db",
            false, true);/*from www. ja  v  a2 s  .  c  om*/

    // register our pool and give it a name
    new PoolingDriver().registerPool("myPool", pool);

    // get a connection and test it
    Connection conn = DriverManager.getConnection("jdbc:apache:commons:dbcp:myPool");

    // now we can use this pool the way we want.
    System.err.println("Are we connected? " + !conn.isClosed());

    System.err.println("Idle Connections: " + pool.getNumIdle() + ", out of " + pool.getNumActive());

}

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From source file:ConnectionPoolBasics.java

public static void main(String args[]) throws Exception {

    GenericObjectPool gPool = new GenericObjectPool();

    /*Class.forName("com.mysql.jdbc.Driver");
            //from www . j  a  va 2  s  . c  o  m
    DriverManagerConnectionFactory cf =
       new DriverManagerConnectionFactory(
    "jdbc:mysql://localhost/commons", "root", "");*/

    Properties props = new Properties();
    props.setProperty("Username", "root");
    props.setProperty("Password", "");
    ConnectionFactory cf = new DriverConnectionFactory(new com.mysql.jdbc.Driver(),
            "jdbc:mysql://localhost/commons", props);

    KeyedObjectPoolFactory kopf = new GenericKeyedObjectPoolFactory(null, 8);

    PoolableConnectionFactory pcf = new PoolableConnectionFactory(cf, gPool, kopf, null, false, true);

    for (int i = 0; i < 5; i++) {
        gPool.addObject();
    }

    // PoolingDataSource pds = new PoolingDataSource(gPool);
    PoolingDriver pd = new PoolingDriver();
    pd.registerPool("example", gPool);

    for (int i = 0; i < 5; i++) {
        gPool.addObject();
    }

    Connection conn = java.sql.DriverManager.getConnection("jdbc:apache:commons:dbcp:example");

    System.err.println("Connection: " + conn); //": Delegate: " + ((org.apache.commons.dbcp.PoolingConnection)conn).getDelegate());

    // do some work with the connection
    PreparedStatement ps = conn.prepareStatement("Select * from customer where id = ?");

    System.err.println("Active: " + gPool.getNumActive() + ", Idle: " + gPool.getNumIdle());

    conn.close();

    System.err.println("Active: " + gPool.getNumActive() + ", Idle: " + gPool.getNumIdle());

}

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From source file:com.adaptris.core.services.splitter.ServiceWorkerPoolLegacyTest.java

@Test
public void testWarmup() throws Exception {
    GenericObjectPool<ServiceWorkerPool.Worker> pool = createObjectPool();
    warmup(pool);//from w ww  . j  a  v  a2  s . c  o m
    assertEquals(10, pool.getNumIdle());
    closeQuietly(pool);

}

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From source file:edu.illinois.enforcemop.examples.apache.pool.TestGenericObjectPool.java

public void testExceptionOnPassivateDuringReturn() throws Exception {
    SimpleFactory factory = new SimpleFactory();
    GenericObjectPool pool = new GenericObjectPool(factory);
    Object obj = pool.borrowObject();
    factory.setThrowExceptionOnPassivate(true);
    pool.returnObject(obj);//from   ww w .  j  av a  2 s.co m
    assertEquals(0, pool.getNumIdle());
    pool.close();
}

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From source file:edu.illinois.enforcemop.examples.apache.pool.TestGenericObjectPool.java

public void testSetFactoryWithNoActiveObjects() throws Exception {
    GenericObjectPool pool = new GenericObjectPool();
    pool.setMaxIdle(10);/* w w w  .  ja  v  a2s . co  m*/
    pool.setFactory(new SimpleFactory());
    Object obj = pool.borrowObject();
    pool.returnObject(obj);
    assertEquals(1, pool.getNumIdle());
    pool.setFactory(new SimpleFactory());
    assertEquals(0, pool.getNumIdle());
}

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From source file:edu.illinois.enforcemop.examples.apache.pool.TestGenericObjectPool.java

public void testExceptionOnDestroyDuringReturn() throws Exception {
    SimpleFactory factory = new SimpleFactory();
    factory.setThrowExceptionOnDestroy(true);
    GenericObjectPool pool = new GenericObjectPool(factory);
    pool.setTestOnReturn(true);/*from  ww w  . j a v a2s  .co  m*/
    Object obj1 = pool.borrowObject();
    pool.borrowObject();
    factory.setValid(false); // Make validation fail
    pool.returnObject(obj1);
    assertEquals(1, pool.getNumActive());
    assertEquals(0, pool.getNumIdle());
}

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From source file:edu.illinois.enforcemop.examples.apache.pool.TestGenericObjectPool.java

public void testExceptionOnDestroyDuringBorrow() throws Exception {
    SimpleFactory factory = new SimpleFactory();
    factory.setThrowExceptionOnDestroy(true);
    GenericObjectPool pool = new GenericObjectPool(factory);
    pool.setTestOnBorrow(true);//from   w ww.jav  a 2 s .  c o m
    pool.borrowObject();
    factory.setValid(false); // Make validation fail on next borrow attempt
    try {
        pool.borrowObject();
        fail("Expecting NoSuchElementException");
    } catch (NoSuchElementException ex) {
        // expected
    }
    assertEquals(1, pool.getNumActive());
    assertEquals(0, pool.getNumIdle());
}

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From source file:edu.illinois.enforcemop.examples.apache.pool.TestGenericObjectPool.java

public void testExceptionOnActivateDuringBorrow() throws Exception {
    SimpleFactory factory = new SimpleFactory();
    GenericObjectPool pool = new GenericObjectPool(factory);
    Object obj1 = pool.borrowObject();
    Object obj2 = pool.borrowObject();
    pool.returnObject(obj1);/* w ww .  ja  v a  2  s  .co m*/
    pool.returnObject(obj2);
    factory.setThrowExceptionOnActivate(true);
    factory.setEvenValid(false);
    // Activation will now throw every other time
    // First attempt throws, but loop continues and second succeeds
    Object obj = pool.borrowObject();
    assertEquals(1, pool.getNumActive());
    assertEquals(0, pool.getNumIdle());

    pool.returnObject(obj);
    factory.setValid(false);
    // Validation will now fail on activation when borrowObject returns
    // an idle instance, and then when attempting to create a new instance
    try {
        obj1 = pool.borrowObject();
        fail("Expecting NoSuchElementException");
    } catch (NoSuchElementException ex) {
        // expected
    }
    assertEquals(0, pool.getNumActive());
    assertEquals(0, pool.getNumIdle());
}

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From source file:edu.illinois.enforcemop.examples.apache.pool.TestGenericObjectPool.java

public void checkEvict(boolean lifo) throws Exception {
    // yea this is hairy but it tests all the code paths in GOP.evict()
    final SimpleFactory factory = new SimpleFactory();
    final GenericObjectPool pool = new GenericObjectPool(factory);
    pool.setSoftMinEvictableIdleTimeMillis(10);
    pool.setMinIdle(2);/*  www .java  2 s . c  o  m*/
    pool.setTestWhileIdle(true);
    pool.setLifo(lifo);
    PoolUtils.prefill(pool, 5);
    pool.evict();
    factory.setEvenValid(false);
    factory.setOddValid(false);
    factory.setThrowExceptionOnActivate(true);
    pool.evict();
    PoolUtils.prefill(pool, 5);
    factory.setThrowExceptionOnActivate(false);
    factory.setThrowExceptionOnPassivate(true);
    pool.evict();
    factory.setThrowExceptionOnPassivate(false);
    factory.setEvenValid(true);
    factory.setOddValid(true);
    Thread.sleep(125);
    pool.evict();
    assertEquals(2, pool.getNumIdle());
}

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