Example usage for javax.naming Context lookup

List of usage examples for javax.naming Context lookup

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Introduction

In this page you can find the example usage for javax.naming Context lookup.

Prototype

public Object lookup(String name) throws NamingException;

Source Link

Document

Retrieves the named object.

Usage

From source file:io.datalayer.activemq.consumer.SimpleConsumer.java

/**
 * @param args the queue used by the example
 *//*from   ww  w  . ja  va  2  s .co m*/
public static void main(String... args) {
    String destinationName = null;
    Context jndiContext = null;
    ConnectionFactory connectionFactory = null;
    Connection connection = null;
    Session session = null;
    Destination destination = null;
    MessageConsumer consumer = null;

    /*
     * Read destination name from command line and display it.
     */
    if (args.length != 1) {
        LOG.info("Usage: java SimpleConsumer <destination-name>");
        System.exit(1);
    }
    destinationName = args[0];
    LOG.info("Destination name is " + destinationName);

    /*
     * Create a JNDI API InitialContext object
     */
    try {
        jndiContext = new InitialContext();
    } catch (NamingException e) {
        LOG.info("Could not create JNDI API " + "context: " + e.toString());
        System.exit(1);
    }

    /*
     * Look up connection factory and destination.
     */
    try {
        connectionFactory = (ConnectionFactory) jndiContext.lookup("ConnectionFactory");
        destination = (Destination) jndiContext.lookup(destinationName);
    } catch (NamingException e) {
        LOG.info("JNDI API lookup failed: " + e.toString());
        System.exit(1);
    }

    /*
     * Create connection. Create session from connection; false means
     * session is not transacted. Create receiver, then start message
     * delivery. Receive all text messages from destination until a non-text
     * message is received indicating end of message stream. Close
     * connection.
     */
    try {
        connection = connectionFactory.createConnection();
        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        consumer = session.createConsumer(destination);
        connection.start();
        while (true) {
            Message m = consumer.receive(1);
            if (m != null) {
                if (m instanceof TextMessage) {
                    TextMessage message = (TextMessage) m;
                    LOG.info("Reading message: " + message.getText());
                } else {
                    break;
                }
            }
        }
    } catch (JMSException e) {
        LOG.info("Exception occurred: " + e);
    } finally {
        if (connection != null) {
            try {
                connection.close();
            } catch (JMSException e) {
            }
        }
    }
}

From source file:io.datalayer.activemq.consumer.SimpleQueueReceiver.java

/**
 * Main method.//w w w .  jav  a  2s  .com
 * 
 * @param args the queue used by the example
 */
public static void main(String... args) {
    String queueName = null;
    Context jndiContext = null;
    QueueConnectionFactory queueConnectionFactory = null;
    QueueConnection queueConnection = null;
    QueueSession queueSession = null;
    Queue queue = null;
    QueueReceiver queueReceiver = null;
    TextMessage message = null;

    /*
     * Read queue name from command line and display it.
     */
    if (args.length != 1) {
        LOG.info("Usage: java " + "SimpleQueueReceiver <queue-name>");
        System.exit(1);
    }
    queueName = args[0];
    LOG.info("Queue name is " + queueName);

    /*
     * Create a JNDI API InitialContext object if none exists yet.
     */
    try {
        jndiContext = new InitialContext();
    } catch (NamingException e) {
        LOG.info("Could not create JNDI API " + "context: " + e.toString());
        System.exit(1);
    }

    /*
     * Look up connection factory and queue. If either does not exist, exit.
     */
    try {
        queueConnectionFactory = (QueueConnectionFactory) jndiContext.lookup("QueueConnectionFactory");
        queue = (Queue) jndiContext.lookup(queueName);
    } catch (NamingException e) {
        LOG.info("JNDI API lookup failed: " + e.toString());
        System.exit(1);
    }

    /*
     * Create connection. Create session from connection; false means
     * session is not transacted. Create receiver, then start message
     * delivery. Receive all text messages from queue until a non-text
     * message is received indicating end of message stream. Close
     * connection.
     */
    try {
        queueConnection = queueConnectionFactory.createQueueConnection();
        queueSession = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
        queueReceiver = queueSession.createReceiver(queue);
        queueConnection.start();
        while (true) {
            Message m = queueReceiver.receive(1);
            if (m != null) {
                if (m instanceof TextMessage) {
                    message = (TextMessage) m;
                    LOG.info("Reading message: " + message.getText());
                } else {
                    break;
                }
            }
        }
    } catch (JMSException e) {
        LOG.info("Exception occurred: " + e.toString());
    } finally {
        if (queueConnection != null) {
            try {
                queueConnection.close();
            } catch (JMSException e) {
            }
        }
    }
}

From source file:io.datalayer.activemq.producer.SimpleProducer.java

/**
 * @param args the destination name to send to and optionally, the number of
 *                messages to send/*from   ww w .  jav a  2s. c om*/
 */
public static void main(String... args) {
    Context jndiContext = null;
    ConnectionFactory connectionFactory = null;
    Connection connection = null;
    Session session = null;
    Destination destination = null;
    MessageProducer producer = null;
    String destinationName = null;
    final int numMsgs;

    if ((args.length < 1) || (args.length > 2)) {
        LOG.info("Usage: java SimpleProducer <destination-name> [<number-of-messages>]");
        System.exit(1);
    }
    destinationName = args[0];
    LOG.info("Destination name is " + destinationName);
    if (args.length == 2) {
        numMsgs = (new Integer(args[1])).intValue();
    } else {
        numMsgs = 1;
    }

    /*
     * Create a JNDI API InitialContext object
     */
    try {
        jndiContext = new InitialContext();
    } catch (NamingException e) {
        LOG.info("Could not create JNDI API context: " + e.toString());
        System.exit(1);
    }

    /*
     * Look up connection factory and destination.
     */
    try {
        connectionFactory = (ConnectionFactory) jndiContext.lookup("ConnectionFactory");
        destination = (Destination) jndiContext.lookup(destinationName);
    } catch (NamingException e) {
        LOG.info("JNDI API lookup failed: " + e);
        System.exit(1);
    }

    /*
     * Create connection. Create session from connection; false means
     * session is not transacted. Create sender and text message. Send
     * messages, varying text slightly. Send end-of-messages message.
     * Finally, close connection.
     */
    try {
        connection = connectionFactory.createConnection();
        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        producer = session.createProducer(destination);
        TextMessage message = session.createTextMessage();
        for (int i = 0; i < numMsgs; i++) {
            message.setText("This is message " + (i + 1));
            LOG.info("Sending message: " + message.getText());
            producer.send(message);
        }

        /*
         * Send a non-text control message indicating end of messages.
         */
        producer.send(session.createMessage());
    } catch (JMSException e) {
        LOG.info("Exception occurred: " + e);
    } finally {
        if (connection != null) {
            try {
                connection.close();
            } catch (JMSException e) {
            }
        }
    }
}

From source file:org.apache.activemq.demo.SimpleQueueSender.java

/**
 * Main method.//from   w w w .  j  a  v a2  s  .  c  o  m
 *
 * @param args the queue used by the example and, optionally, the number of
 *                messages to send
 */
public static void main(String[] args) {
    String queueName = null;
    Context jndiContext = null;
    QueueConnectionFactory queueConnectionFactory = null;
    QueueConnection queueConnection = null;
    QueueSession queueSession = null;
    Queue queue = null;
    QueueSender queueSender = null;
    TextMessage message = null;
    final int numMsgs;

    if ((args.length < 1) || (args.length > 2)) {
        LOG.info("Usage: java SimpleQueueSender " + "<queue-name> [<number-of-messages>]");
        System.exit(1);
    }
    queueName = args[0];
    LOG.info("Queue name is " + queueName);
    if (args.length == 2) {
        numMsgs = (new Integer(args[1])).intValue();
    } else {
        numMsgs = 1;
    }

    /*
     * Create a JNDI API InitialContext object if none exists yet.
     */
    try {
        jndiContext = new InitialContext();
    } catch (NamingException e) {
        LOG.info("Could not create JNDI API context: " + e.toString());
        System.exit(1);
    }

    /*
     * Look up connection factory and queue. If either does not exist, exit.
     */
    try {
        queueConnectionFactory = (QueueConnectionFactory) jndiContext.lookup("QueueConnectionFactory");
        queue = (Queue) jndiContext.lookup(queueName);
    } catch (NamingException e) {
        LOG.info("JNDI API lookup failed: " + e);
        System.exit(1);
    }

    /*
     * Create connection. Create session from connection; false means
     * session is not transacted. Create sender and text message. Send
     * messages, varying text slightly. Send end-of-messages message.
     * Finally, close connection.
     */
    try {
        queueConnection = queueConnectionFactory.createQueueConnection();
        queueSession = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
        queueSender = queueSession.createSender(queue);
        message = queueSession.createTextMessage();
        for (int i = 0; i < numMsgs; i++) {
            message.setText("This is message " + (i + 1));
            LOG.info("Sending message: " + message.getText());
            queueSender.send(message);
        }

        /*
         * Send a non-text control message indicating end of messages.
         */
        queueSender.send(queueSession.createMessage());
    } catch (JMSException e) {
        LOG.info("Exception occurred: " + e.toString());
    } finally {
        if (queueConnection != null) {
            try {
                queueConnection.close();
            } catch (JMSException e) {
            }
        }
    }
}

From source file:io.datalayer.activemq.producer.SimpleQueueSender.java

/**
 * Main method.//w  w w  .  j a va 2 s  . c  o m
 * 
 * @param args the queue used by the example and, optionally, the number of
 *                messages to send
 */
public static void main(String... args) {
    String queueName = null;
    Context jndiContext = null;
    QueueConnectionFactory queueConnectionFactory = null;
    QueueConnection queueConnection = null;
    QueueSession queueSession = null;
    Queue queue = null;
    QueueSender queueSender = null;
    TextMessage message = null;
    final int numMsgs;

    if ((args.length < 1) || (args.length > 2)) {
        LOG.info("Usage: java SimpleQueueSender " + "<queue-name> [<number-of-messages>]");
        System.exit(1);
    }
    queueName = args[0];
    LOG.info("Queue name is " + queueName);
    if (args.length == 2) {
        numMsgs = (new Integer(args[1])).intValue();
    } else {
        numMsgs = 1;
    }

    /*
     * Create a JNDI API InitialContext object if none exists yet.
     */
    try {
        jndiContext = new InitialContext();
    } catch (NamingException e) {
        LOG.info("Could not create JNDI API context: " + e.toString());
        System.exit(1);
    }

    /*
     * Look up connection factory and queue. If either does not exist, exit.
     */
    try {
        queueConnectionFactory = (QueueConnectionFactory) jndiContext.lookup("QueueConnectionFactory");
        queue = (Queue) jndiContext.lookup(queueName);
    } catch (NamingException e) {
        LOG.info("JNDI API lookup failed: " + e);
        System.exit(1);
    }

    /*
     * Create connection. Create session from connection; false means
     * session is not transacted. Create sender and text message. Send
     * messages, varying text slightly. Send end-of-messages message.
     * Finally, close connection.
     */
    try {
        queueConnection = queueConnectionFactory.createQueueConnection();
        queueSession = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
        queueSender = queueSession.createSender(queue);
        message = queueSession.createTextMessage();
        for (int i = 0; i < numMsgs; i++) {
            message.setText("This is message " + (i + 1));
            LOG.info("Sending message: " + message.getText());
            queueSender.send(message);
        }

        /*
         * Send a non-text control message indicating end of messages.
         */
        queueSender.send(queueSession.createMessage());
    } catch (JMSException e) {
        LOG.info("Exception occurred: " + e.toString());
    } finally {
        if (queueConnection != null) {
            try {
                queueConnection.close();
            } catch (JMSException e) {
            }
        }
    }
}

From source file:org.apache.struts.util.LookupUtils.java

public static Object lookup(String jndiName) throws NamingException {
    log.info("JnDiName [ " + jndiName + " ]");
    Context context = new InitialContext();
    return context.lookup(jndiName);
}

From source file:org.apache.synapse.commons.datasource.DataSourceFinder.java

/**
 * Find a DataSource using the given name and naming context
 *
 * @param dsName  Name of the DataSource to be found
 * @param context Naming Context/*w  ww .  j a  va  2s  .  co m*/
 * @return DataSource if found , otherwise null
 */
public static DataSource find(String dsName, Context context) {

    try {
        Object dataSourceO = context.lookup(dsName);
        if (dataSourceO != null && dataSourceO instanceof DataSource) {
            return (DataSource) dataSourceO;
        } else {
            throw new SynapseCommonsException("DataSource : " + dsName + " not found "
                    + "when looking up using JNDI properties : " + context.getEnvironment(), log);
        }

    } catch (NamingException e) {
        throw new SynapseCommonsException(
                "Error looking up DataSource : " + dsName + " using JNDI" + " properties : " + context, e, log);
    }
}

From source file:com.itcs.commons.email.impl.NoReplySystemMailSender.java

/**
 * Singleton pattern//from  w ww.j av a2 s  .co m
 * @return
 * @throws NamingException 
 */
private static Session getSession() throws NamingException {
    if (noReplyGodeskEmailSession == null) {
        Context ctx = new InitialContext();
        noReplyGodeskEmailSession = (Session) ctx.lookup("mail/noReplyGodeskEmailSession");
    }
    return noReplyGodeskEmailSession;
}

From source file:com.wso2telco.core.mnc.resolver.dao.OperatorDAO.java

public static void initializeDatasources() throws MobileNtException {
    if (datasource != null) {
        return;/* w w  w  .j a v  a  2 s. c o m*/
    }

    try {
        Context ctx = new InitialContext();
        datasource = (DataSource) ctx.lookup(DataSourceNames.WSO2TELCO_DEP_DB.jndiName());
    } catch (NamingException e) {
        handleException("Error while looking up the data source: " + DataSourceNames.WSO2TELCO_DEP_DB, e);
    }
}

From source file:org.jtalks.poulpe.model.utils.JndiAwarePropertyPlaceholderConfigurer.java

/**
 * Takes a look at Tomcat JNDI environment ({@code java:/comp/env}) and tries to find the placeholder there. Returns
 * {@code null} if nothing found there, otherwise found value is returned as a string.
 *
 * <p>Method is public, so that it can be used in initialization phase of web app out of Spring IoC. Also it also
 * doesn't use any logging, which is particularly useful when it comes to initializing of the logger itself.</p>
 *
 * @param placeholder the property key to find its values
 * @return the value of the property from Tomcat JNDI or {@code null} if nothing found there
 *//*from  w  ww .  j a v  a  2 s  .c o m*/
public static String resolveJndiProperty(String placeholder) {
    try {
        Context initContext = new InitialContext();
        Context envContext = (Context) initContext.lookup(TOMCAT_CONTEXT_NAME);
        return (String) envContext.lookup(placeholder);
    } catch (NamingException e) {
        return null;
    }
}