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4245
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leinfelder
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/**
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* '$RCSfile: DatabaseConnectionPoolFactory.java,v $'
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*
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* '$Author: leinfelder $'
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* '$Date: 2007/10/05 21:10:17 $'
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* '$Revision: 1.1 $'
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*
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* For Details: http://kepler.ecoinformatics.org
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*
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* Copyright (c) 2003 The Regents of the University of California.
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* All rights reserved.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
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* FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
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* PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY
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* OF CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
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* UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*/
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package edu.ucsb.nceas.metacat.dataquery;
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5030
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daigle
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import edu.ucsb.nceas.metacat.properties.PropertyService;
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4245
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leinfelder
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import java.sql.Connection;
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import java.sql.SQLException;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.ecoinformatics.datamanager.database.ConnectionNotAvailableException;
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import org.ecoinformatics.datamanager.database.DatabaseConnectionPoolInterface;
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/**
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* This class provides an implementation of DataConnetionPoolInterface
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* Implementation and database information for this class will be read from property file.
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*
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* @author leinfelder
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*
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*/
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6000
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leinfelder
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public class MetacatDatabaseConnectionPoolFactory {
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4245
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leinfelder
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6000
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leinfelder
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public static Log log = LogFactory.getLog(MetacatDatabaseConnectionPoolFactory.class);
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4245
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leinfelder
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private static String implementationClass = null;
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static {
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loadOptions();
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}
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/**
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* Constructor. Loading database parameter from property file
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*
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*/
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6000
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leinfelder
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public MetacatDatabaseConnectionPoolFactory() {
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4245
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leinfelder
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}
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/**
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* Loads Data Manager options from a configuration file.
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*/
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private static void loadOptions() {
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try {
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implementationClass = PropertyService.getProperty("datamanager.implementation");
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}
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catch (Exception e) {
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log.error("Error in loading options: " + e.getMessage());
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}
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}
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public static DatabaseConnectionPoolInterface getDatabaseConnectionPoolInterface() {
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DatabaseConnectionPoolInterface instance = null;
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try {
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instance =
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(DatabaseConnectionPoolInterface) Class.forName(implementationClass).newInstance();
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} catch (Exception e) {
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log.error(e.getMessage()
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+ ": could not create DatabaseConnectionPoolInterface implementation: "
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+ implementationClass);
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e.printStackTrace();
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}
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return instance;
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}
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public static void main(String arg[]) {
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Connection conn = null;
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try {
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6000
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leinfelder
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conn = MetacatDatabaseConnectionPoolFactory.getDatabaseConnectionPoolInterface().getConnection();
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4245
|
leinfelder
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log.debug("conn=" + conn);
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} catch (SQLException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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} catch (ConnectionNotAvailableException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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finally {
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try {
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conn.close();
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} catch (SQLException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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}
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}
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}
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