/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-06 The eXist Project
* http://exist-db.org
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* $Id: Configuration.java 5400 2007-02-25 13:20:15Z wolfgang_m $
*/
package org.exist.util;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Optional;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class SingleInstanceConfiguration extends Configuration {
/* FIXME: It's not clear whether this class is meant to be a singleton (due to the static
* file and existHome fields and static methods), or if we should allow many instances to
* run around in the system. Right now, any attempts to create multiple instances will
* likely get the system confused. Let's decide which one it should be and fix it properly.
*
* This class cannot be a singleton as it is possible to run multiple instances of the database
* on the same system.
*/
@SuppressWarnings("unused")
private final static Logger LOG = LogManager.getLogger(SingleInstanceConfiguration.class); //Logger
protected static Optional<Path> _configFile = Optional.empty(); //config file (conf.xml by default)
protected static Optional<Path> _existHome = Optional.empty();
public SingleInstanceConfiguration() throws DatabaseConfigurationException {
this("conf.xml", Optional.empty());
}
public SingleInstanceConfiguration(final String configFilename) throws DatabaseConfigurationException {
this(configFilename, Optional.empty());
}
public SingleInstanceConfiguration(String configFilename, Optional<Path> existHomeDirname) throws DatabaseConfigurationException {
super(configFilename, existHomeDirname);
_configFile = configFilePath;
_existHome = existHome;
}
/**
* Returns the absolute path to the configuration file.
*
* @return the path to the configuration file
*/
public static Optional<Path> getPath() {
if (!_configFile.isPresent()) {
final Path f = ConfigurationHelper.lookup("conf.xml");
return Optional.of(f.toAbsolutePath());
}
return _configFile;
}
/**
* Check wether exist runs in Servlet container (as war file).
* @return TRUE if exist runs in servlet container.
*/
public static boolean isInWarFile(){
boolean retVal =true;
// if existHome is not set,try to do so.
if (!_existHome.isPresent()){
_existHome = ConfigurationHelper.getExistHome();
}
if(_existHome.map(h -> Files.isDirectory(h.resolve("lib/core"))).orElse(false)) {
retVal = false;
}
return retVal;
}
/**
* Get folder in which the exist webapplications are found.
* For default install ("jar install") and in webcontainer ("war install")
* the location is different. (EXIST_HOME/webapps vs. TOMCAT/webapps/exist)
*
* @return folder.
*/
public static Optional<Path> getWebappHome(){
// if existHome is not set, try to do so.
if (!_existHome.isPresent()){
_existHome = ConfigurationHelper.getExistHome();
}
return _existHome.map(h -> isInWarFile() ? h.getParent() : h.resolve("webapp"));
}
}