Java Connection类代码示例

import javax.jms.Connection; //导入依赖的package包/类
private void putTopic(List<String> events) throws Exception {
  ConnectionFactory factory = new ActiveMQConnectionFactory(USERNAME,
      PASSWORD, BROKER_BIND_URL);
  Connection connection = factory.createConnection();
  connection.start();

  Session session = connection.createSession(true,
      Session.AUTO_ACKNOWLEDGE);
  Destination destination = session.createTopic(DESTINATION_NAME);
  MessageProducer producer = session.createProducer(destination);

  for (String event : events) {
    TextMessage message = session.createTextMessage();
    message.setText(event);
    producer.send(message);
  }
  session.commit();
  session.close();
  connection.close();
}
 

import javax.jms.Connection; //导入依赖的package包/类
public void receiveAndRespondWithMessageIdAsCorrelationId(ConnectionFactory connectionFactory, String queueName) throws JMSException {
    Connection connection = connectionFactory.createConnection();
    Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
    MessageConsumer consumer = session.createConsumer(session.createQueue(queueName));
    final javax.jms.Message inMessage = consumer.receive();

    String requestMessageId = inMessage.getJMSMessageID();
    LOG.debug("Received message " + requestMessageId);
    final TextMessage replyMessage = session.createTextMessage("Result");
    replyMessage.setJMSCorrelationID(inMessage.getJMSMessageID());
    final MessageProducer producer = session.createProducer(inMessage.getJMSReplyTo());
    LOG.debug("Sending reply to " + inMessage.getJMSReplyTo());
    producer.send(replyMessage);

    producer.close();
    consumer.close();
    session.close();
    connection.close();
}
 

import javax.jms.Connection; //导入依赖的package包/类
public Message createMessage(Object messageObject) throws JMSException {
	Connection connection = null;
	Message result = null;
	try {
		connection = startConnection();
		Session session = null;
		try {
			session = connection.createSession(isTransacted, Session.AUTO_ACKNOWLEDGE);
			if (messageObject == null) {
				result = session.createMessage();
			} else {
				if (messageObject instanceof String) {
					result = session.createTextMessage((String) messageObject);
				} else {
					result = session.createObjectMessage((Serializable) messageObject);
				}
			}
		} finally {
			if (session != null) session.close();
		}
	} finally {
		safeCloseConnection(connection);
	}
	return result;
}
 

import javax.jms.Connection; //导入依赖的package包/类
private void sendObjectMsgSingleSession(List<? extends Serializable> objectsToSend) throws JMSException {
    Session session = null;
    Connection conn = null;
    try {
        conn = qFactory.createConnection();
        session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
        MessageProducer producer = session.createProducer(queue);
        for (Serializable objectToSend : objectsToSend) {
            ObjectMessage msg = session.createObjectMessage();
            msg.setObject(objectToSend);
            producer.send(msg);
        }
    } finally {
        closeSession(session);
        closeConnection(conn);
    }
}
 

import javax.jms.Connection; //导入依赖的package包/类
@Test(timeout = 60000)
public void testCreateSession() throws Exception {
    Connection connection = cf.createConnection();

    Session session1 = connection.createSession();
    Session session2 = connection.createSession();

    assertNotSame(session1, session2);
    assertEquals(session1.getAcknowledgeMode(), Session.AUTO_ACKNOWLEDGE);
    assertEquals(session2.getAcknowledgeMode(), Session.AUTO_ACKNOWLEDGE);

    JmsPoolSession wrapperSession1 = (JmsPoolSession) session1;
    JmsPoolSession wrapperSession2 = (JmsPoolSession) session2;

    assertNotSame(wrapperSession1.getSession(), wrapperSession2.getSession());
}
 

import javax.jms.Connection; //导入依赖的package包/类
@Test(timeout = 60000)
public void testSetClientIDTwiceWithSameID() throws Exception {
    Connection connection = cf.createConnection();

    // test: call setClientID("newID") twice
    // this should be tolerated and not result in an exception
    connection.setClientID("newID");

    try {
        connection.setClientID("newID");
        connection.start();
        connection.close();
    } catch (IllegalStateException ise) {
        LOG.error("Repeated calls to newID2.setClientID(\"newID\") caused " + ise.getMessage());
        fail("Repeated calls to newID2.setClientID(\"newID\") caused " + ise.getMessage());
    } finally {
        cf.stop();
    }

    LOG.debug("Test finished.");
}
 

import javax.jms.Connection; //导入依赖的package包/类
@Test(timeout = 60000)
public void testSetClientIDTwiceWithDifferentID() throws Exception {
    Connection connection = cf.createConnection();

    // test: call setClientID() twice with different IDs
    // this should result in an IllegalStateException
    connection.setClientID("newID1");
    try {
        connection.setClientID("newID2");
        fail("calling Connection.setClientID() twice with different clientID must raise an IllegalStateException");
    } catch (IllegalStateException ise) {
        LOG.debug("Correctly received " + ise);
    } finally {
        connection.close();
        cf.stop();
    }

    LOG.debug("Test finished.");
}
 

import javax.jms.Connection; //导入依赖的package包/类
@Test(timeout = 60000)
public void testSetClientIDAfterConnectionStart() throws Exception {
    Connection connection = cf.createConnection();

    // test: try to call setClientID() after start()
    // should result in an exception
    try {
        connection.start();
        connection.setClientID("newID3");
        fail("Calling setClientID() after start() mut raise a JMSException.");
    } catch (IllegalStateException ise) {
        LOG.debug("Correctly received " + ise);
    } finally {
        connection.close();
        cf.stop();
    }

    LOG.debug("Test finished.");
}
 

import javax.jms.Connection; //导入依赖的package包/类
@Test(timeout = 60000)
public void testConnectionsAreRotated() throws Exception {
    JmsPoolConnectionFactory cf = createPooledConnectionFactory();
    cf.setMaxConnections(10);

    Connection previous = null;

    // Front load the pool.
    for (int i = 0; i < 10; ++i) {
        cf.createConnection();
    }

    for (int i = 0; i < 100; ++i) {
        Connection current = ((JmsPoolConnection) cf.createConnection()).getConnection();
        assertNotSame(previous, current);
        previous = current;
    }

    cf.stop();
}
 

import javax.jms.Connection; //导入依赖的package包/类
@Test(timeout = 60000)
public void testSetClientIDTwiceWithSameID() throws Exception {
    LOG.debug("running testRepeatedSetClientIDCalls()");

    // test: call setClientID("newID") twice
    // this should be tolerated and not result in an exception
    ConnectionFactory cf = createPooledConnectionFactory();
    Connection conn = cf.createConnection();
    conn.setClientID("newID");

    try {
        conn.setClientID("newID");
        conn.start();
        conn.close();
    } catch (IllegalStateException ise) {
        LOG.error("Repeated calls to newID2.setClientID(\"newID\") caused " + ise.getMessage());
        fail("Repeated calls to newID2.setClientID(\"newID\") caused " + ise.getMessage());
    } finally {
        ((JmsPoolConnectionFactory) cf).stop();
    }

    LOG.debug("Test finished.");
}
 

import javax.jms.Connection; //导入依赖的package包/类
@Test(timeout = 60000)
public void testSetClientIDTwiceWithDifferentID() throws Exception {
    LOG.debug("running testRepeatedSetClientIDCalls()");

    ConnectionFactory cf = createPooledConnectionFactory();
    Connection conn = cf.createConnection();

    // test: call setClientID() twice with different IDs
    // this should result in an IllegalStateException
    conn.setClientID("newID1");
    try {
        conn.setClientID("newID2");
        fail("calling Connection.setClientID() twice with different clientID must raise an IllegalStateException");
    } catch (IllegalStateException ise) {
        LOG.debug("Correctly received " + ise);
    } finally {
        conn.close();
        ((JmsPoolConnectionFactory) cf).stop();
    }

    LOG.debug("Test finished.");
}
 

import javax.jms.Connection; //导入依赖的package包/类
@Test(timeout = 60000)
public void testSetClientIDAfterConnectionStart() throws Exception {
    LOG.debug("running testRepeatedSetClientIDCalls()");

    ConnectionFactory cf = createPooledConnectionFactory();
    Connection conn = cf.createConnection();

    // test: try to call setClientID() after start()
    // should result in an exception
    try {
        conn.start();
        conn.setClientID("newID3");
        fail("Calling setClientID() after start() mut raise a JMSException.");
    } catch (IllegalStateException ise) {
        LOG.debug("Correctly received " + ise);
    } finally {
        conn.close();
        ((JmsPoolConnectionFactory) cf).stop();
    }

    LOG.debug("Test finished.");
}
 

import javax.jms.Connection; //导入依赖的package包/类
@Test(timeout = 60000)
public void testConnectionsAreRotated() throws Exception {
    cf.setMaxConnections(10);

    Connection previous = null;

    // Front load the pool.
    for (int i = 0; i < 10; ++i) {
        cf.createConnection();
    }

    for (int i = 0; i < 100; ++i) {
        Connection current = ((JmsPoolConnection) cf.createConnection()).getConnection();
        assertNotSame(previous, current);
        previous = current;
    }

    cf.stop();
}
 

import javax.jms.Connection; //导入依赖的package包/类
@Test(timeout = 60000)
public void testSetClientIDTwiceWithSameID() throws Exception {
    // test: call setClientID("newID") twice
    // this should be tolerated and not result in an exception
    Connection conn = cf.createConnection();
    conn.setClientID("newID");

    try {
        conn.setClientID("newID");
        conn.start();
        conn.close();
    } catch (IllegalStateException ise) {
        LOG.error("Repeated calls to newID2.setClientID(\"newID\") caused " + ise.getMessage());
        fail("Repeated calls to newID2.setClientID(\"newID\") caused " + ise.getMessage());
    } finally {
        cf.stop();
    }

    LOG.debug("Test finished.");
}
 

import javax.jms.Connection; //导入依赖的package包/类
@Test(timeout = 60000)
public void testSetClientIDTwiceWithDifferentID() throws Exception {
    Connection conn = cf.createConnection();

    // test: call setClientID() twice with different IDs
    // this should result in an IllegalStateException
    conn.setClientID("newID1");
    try {
        conn.setClientID("newID2");
        fail("calling Connection.setClientID() twice with different clientID must raise an IllegalStateException");
    } catch (IllegalStateException ise) {
        LOG.debug("Correctly received " + ise);
    } finally {
        conn.close();
        cf.stop();
    }

    LOG.debug("Test finished.");
}