X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2Forg%2Fmxchange%2Fjcoreee%2Fbean%2Fejb%2FBaseEnterpriseBean.java;fp=src%2Forg%2Fmxchange%2Fjcoreee%2Fbean%2Fejb%2FBaseEnterpriseBean.java;h=a08610c116cc03b03350393133e5bdf8796583a6;hb=b92af5ac83b41b05b1df42c8b364f796acb3e4c3;hp=0000000000000000000000000000000000000000;hpb=1f141c043a053621b86a5701420ca71f17a64e7b;p=jcore-utils.git

diff --git a/src/org/mxchange/jcoreee/bean/ejb/BaseEnterpriseBean.java b/src/org/mxchange/jcoreee/bean/ejb/BaseEnterpriseBean.java
new file mode 100644
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+/*
+ * Copyright (C) 2016 - 2018 Free Software Foundation
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.mxchange.jcoreee.bean.ejb;
+
+import java.io.Serializable;
+import java.text.MessageFormat;
+import javax.faces.FacesException;
+import javax.jms.Connection;
+import javax.jms.JMSException;
+import javax.jms.MessageProducer;
+import javax.jms.ObjectMessage;
+import javax.jms.Queue;
+import javax.jms.QueueConnectionFactory;
+import javax.jms.Session;
+import javax.naming.Context;
+import javax.naming.InitialContext;
+import javax.naming.NamingException;
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+import org.mxchange.jcoreeelogger.beans.local.logger.Log;
+import org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal;
+
+/**
+ * A helper class for beans that access the database.
+ * <p>
+ * @author Roland Häder<roland@mxchange.org>
+ */
+public abstract class BaseEnterpriseBean implements Serializable {
+
+	/**
+	 * Serial number
+	 */
+	private static final long serialVersionUID = 217_687_175_985_875L;
+
+	/**
+	 * Connection
+	 */
+	private Connection connection;
+
+	/**
+	 * Entity manager
+	 */
+	@PersistenceContext
+	private EntityManager entityManager;
+
+	/**
+	 * Logger instance
+	 */
+	@Log
+	private LoggerBeanLocal loggerBeanLocal;
+
+	/**
+	 * Message producer
+	 */
+	private MessageProducer messageProducer;
+
+	/**
+	 * Mailer message queue
+	 */
+	private Queue queue;
+
+	/**
+	 * Session instance
+	 */
+	private Session session;
+
+	/**
+	 * This class' default protected constructor. Please invoke
+	 * super("jms/project-queue-factory", "jms/project-email-queue"); if you
+	 * need to send emails.
+	 */
+	protected BaseEnterpriseBean () {
+		// Call super constructor
+		super();
+
+		// Init logger instance
+		this.initLoggerInstance();
+	}
+
+	/**
+	 * Constructor with queue factory JNDI and queue JNDI names
+	 * <p>
+	 * @param factoryJndi JNDI name for queue factory
+	 * @param queueJndi   JNDI name for email queue
+	 */
+	protected BaseEnterpriseBean (final String factoryJndi, final String queueJndi) {
+		// Call default constructor
+		this();
+
+		// Try it out
+		try {
+			// Get initial context
+			Context context = new InitialContext();
+
+			// Get factory from JMS resource
+			QueueConnectionFactory connectionFactory = (QueueConnectionFactory) context.lookup(factoryJndi);
+
+			// Lookup queue
+			this.queue = (Queue) context.lookup(queueJndi);
+
+			// Create connection
+			this.connection = connectionFactory.createConnection();
+
+			// Init session instance
+			this.session = this.connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
+
+			// And message producer
+			this.messageProducer = this.session.createProducer(this.queue);
+		} catch (final NamingException | JMSException e) {
+			// Continued to throw
+			throw new FacesException(e);
+		}
+	}
+
+	/**
+	 * Initializes logger instance
+	 */
+	private void initLoggerInstance () {
+		try {
+			// Get initial context
+			Context context = new InitialContext();
+
+			// Lookup logger
+			this.loggerBeanLocal = (LoggerBeanLocal) context.lookup("java:global/jcore-logger-ejb/logger!org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal"); //NOI18N
+		} catch (final NamingException ex) {
+			// Continue to throw
+			throw new RuntimeException(MessageFormat.format("context.lookup() failed: {0}", ex.getMessage()), ex); //NOI18N
+		}
+	}
+
+	/**
+	 * Getter for connection instance
+	 * <p>
+	 * @return Connection instance
+	 */
+	protected EntityManager getEntityManager () {
+		return this.entityManager;
+	}
+
+	/**
+	 * Getter for loggerBeanLocal
+	 * <p>
+	 * @return Logger instance
+	 */
+	protected LoggerBeanLocal getLoggerBeanLocal () {
+		return this.loggerBeanLocal;
+	}
+
+	/**
+	 * Getter for configured message producer instance
+	 * <p>
+	 * @return Message producer
+	 */
+	protected MessageProducer getMessageProducer () {
+		return this.messageProducer;
+	}
+
+	/**
+	 * Getter for configured session instance
+	 * <p>
+	 * @return Session
+	 */
+	protected Session getSession () {
+		return this.session;
+	}
+
+	/**
+	 * Sends given message to configured queue
+	 * <p>
+	 * @param message Message to send
+	 * <p>
+	 * @throws JMSException if something went wrong
+	 */
+	protected void sendMessage (final ObjectMessage message) throws JMSException {
+		// Trace message
+		this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.sendMessage: message={1} - CALLED!", this.getClass().getSimpleName(), message)); //NOI18N
+
+		// The parameter should be valid
+		if (null == message) {
+			// Throw NPE
+			throw new NullPointerException("message is null"); //NOI18N
+		} else if (this.getMessageProducer() == null) {
+			// Throw NPE again
+			throw new NullPointerException("this.messageProvider is null"); //NOI18N
+		}
+
+		// Send it
+		this.getMessageProducer().send(message);
+
+		// Trace message
+		this.getLoggerBeanLocal().logTrace(MessageFormat.format("{0}.sendMessage: EXIT!", this.getClass().getSimpleName())); //NOI18N
+	}
+
+}