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/*
* This file is part of PetaScope.
*
* PetaScope 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 3 of
* the License, or (at your option) any later version.
*
* PetaScope 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 PetaScope. If not, see <http://www.gnu.org/licenses/>.
*
* For more information please see <http://www.PetaScope.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*
* Copyright 2009 Jacobs University Bremen, Peter Baumann.
*/
package petascope;
//~--- JDK imports ------------------------------------------------------------
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.util.Properties;
import javax.servlet.ServletException;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import petascope.wcs2.server.templates.WcsNamespaceContext;
/**
* Configuration Manager class: a single entry point for all server settings.
* Implements the singleton design pattern.
*
* @author Andrei Aiordachioaie
*/
public class ConfigManager {
private static Logger LOG = LoggerFactory.getLogger(ConfigManager.class);
/* Major version number. This is the first release (1). */
private final static String MAJOR = "1";
/* Minor version number. v2 adds the reference implementation of WCS 2.0.
v3 adds WGS84 handling in WCPS requests. */
private final static String MINOR = "3";
/* Bug-fix count. We have a hack: every WCPS response is written to disk. */
private final static String BUGFIX = "7-hack";
/* Petascope 1.2.0 contains WCS 1.1.0, WCS 2.0, WCS-T 1.0.0 and WCPS 1.0.0 */
public final static String PETASCOPE_VERSION = MAJOR + "." + MINOR + "." + BUGFIX;
/* Settings variables */
public static String WCST_LANGUAGE;
public static String WCST_VERSION;
public static String RASDAMAN_URL;
public static String RASDAMAN_DATABASE;
public static String METADATA_DRIVER;
public static String METADATA_URL;
public static String METADATA_USER;
public static String METADATA_PASS;
public static boolean CCIP_HACK = false;
/* WCS 2.0 variables */
public static String WCS2_GET_CAPABILITIES_TEMPLATE;
public static String WCS2_DESCRIBE_COVERAGE_TEMPLATE;
public static String WCS2_GET_COVERAGE_TEMPLATE;
public static String WCS2_SCHEMA_URL;
/* This URL gets initialized automatically when the first request is received.
* Its value is used in the Capabilities response */
public static String PETASCOPE_SERVLET_URL;
/* WCS-T Settings. Overridden by user-preferences in <code>settings.properties</code> */
public static String WCST_DEFAULT_INTERPOLATION = "none";
public static String WCST_DEFAULT_NULL_RESISTANCE = "none";
public static String WCST_DEFAULT_DATATYPE = "unsigned char";
/* Singleton instance */
private static ConfigManager instance;
private static Properties props;
/**
* Private constructor. Use <i>getInstance()</i>.
*
* @param settingsPath Path to the settings properties file
* @param servletRoot Path to the root folder where the servlet is deployed
*/
private ConfigManager(String settingsPath, String servletRoot) throws ServletException {
props = new Properties();
try {
LOG.info("Loading settings from file: " + settingsPath);
props.load(new FileInputStream(settingsPath));
initSettings(servletRoot);
} catch (IOException e) {
LOG.error("Failed to load settings. Stack trace: " + e);
throw new ServletException("Failed to load settings file.");
}
}
/**
* Returns the instance of the ConfigManager. If no such instance exists,
* it creates one with the specified settings file.
*
* @param settingsPath Path to the settings file
* @param servletRoot Path to the deployed servlet root
* @return instance of the ConfigManager class
*/
public static ConfigManager getInstance(String settingsPath, String servletRoot) throws ServletException {
if (instance == null) {
instance = new ConfigManager(settingsPath, servletRoot);
}
return instance;
}
public static ConfigManager getInstance() {
if (instance == null) {
throw new RuntimeException("Could not initialize the ConfigManager "
+ "because no settings file path was provided.");
}
return instance;
}
/**
* Return a setting value from the settings file
*
* @param key Key of the setting
* @return String value, or the empty string in case the key does not exist
*/
private String get(String key) {
String result = "";
if (props.containsKey(key)) {
result = props.getProperty(key);
}
return result;
}
private void initSettings(String servletRoot) {
WCST_LANGUAGE = get("wcst_language");
WCST_VERSION = get("wcst_version");
RASDAMAN_DATABASE = get("rasdaman_database");
RASDAMAN_URL = get("rasdaman_url");
METADATA_DRIVER = get("metadata_driver");
METADATA_URL = get("metadata_url");
METADATA_USER = get("metadata_user");
METADATA_PASS = get("metadata_pass");
CCIP_HACK = Boolean.parseBoolean(get("ccip_version"));
try {
URI desc = WcsNamespaceContext.class.getResource("DescribeCoverageTemplate.xml").toURI();
URI getcov = WcsNamespaceContext.class.getResource("GetCoverageTemplate.xml").toURI();
URI getcap = WcsNamespaceContext.class.getResource("GetCapabilitiesTemplate.xml").toURI();
WCS2_GET_CAPABILITIES_TEMPLATE = loadFile(getcap);
WCS2_DESCRIBE_COVERAGE_TEMPLATE = loadFile(desc);
WCS2_GET_COVERAGE_TEMPLATE = loadFile(getcov);
WCS2_SCHEMA_URL = get("wcs2_schema_url");
} catch (Exception e) {
LOG.warn("Could not read XML template files for WCS 2.0. Therefore, WCS 2.0 will be unable to start.");
}
/* User preferences override default values for WCS-T */
String tmp = get("default_interpolation");
if (tmp.length() > 0) {
WCST_DEFAULT_INTERPOLATION = tmp;
}
tmp = get("default_null_resistance");
if (tmp.length() > 0) {
WCST_DEFAULT_NULL_RESISTANCE = tmp;
}
tmp = get("default_datatype");
if (tmp.length() > 0) {
WCST_DEFAULT_DATATYPE = tmp;
}
LOG.info("---------------------------");
if (CCIP_HACK) {
LOG.info("-----------CCIP------------");
}
LOG.info("---------------------------");
// log("Print Log: " + PRINT_LOG);
LOG.info(" *** PETASCOPE *** ");
LOG.info("Rasdaman URL: " + RASDAMAN_URL);
LOG.info("Rasdaman DB: " + RASDAMAN_DATABASE);
LOG.info("Metadata Driver: " + METADATA_DRIVER);
LOG.info("Metadata URL: " + METADATA_URL);
LOG.info("Metadata Username: " + METADATA_USER);
// LOG.info("Metadata Password: " + METADATA_PASS);
LOG.info(" *** WCS-T *** ");
LOG.info("WCS-T Language: " + WCST_LANGUAGE);
LOG.info("WCS-T Version: " + WCST_VERSION);
LOG.info("WCS-T Default Interpolation: " + WCST_DEFAULT_INTERPOLATION);
LOG.info("WCS-T Default Null Resistance: " + WCST_DEFAULT_NULL_RESISTANCE);
LOG.info("WCS-T Default Datatype: " + WCST_DEFAULT_DATATYPE);
LOG.info(" *** WCS 2.0 *** ");
LOG.trace("Get Capabilities Template: " + WCS2_GET_CAPABILITIES_TEMPLATE.substring(0, 100));
LOG.trace("Describe Coverage Template: " + WCS2_DESCRIBE_COVERAGE_TEMPLATE.substring(0, 100));
LOG.trace("Get Capabilities Template: " + WCS2_GET_COVERAGE_TEMPLATE.substring(0, 100));
LOG.info("---------------------------");
}
private String loadFile(URI fileUri) throws IOException {
InputStream is = null;
String contents = null;
try {
LOG.debug("Loading file: " + fileUri);
File f = new File(fileUri);
is = new FileInputStream(f);
contents = IOUtils.toString(is);
} finally {
try {
is.close();
} catch (IOException ex) {
}
}
return contents;
}
}
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