org.mycore.common.config.MCRDefaultConfigurationLoader Maven / Gradle / Ivy
/*
* This file is part of *** M y C o R e ***
* See http://www.mycore.de/ for details.
*
* MyCoRe 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.
*
* MyCoRe 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 MyCoRe. If not, see .
*/
package org.mycore.common.config;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Map;
import org.apache.commons.io.input.TeeInputStream;
import org.mycore.common.content.MCRContent;
import org.mycore.common.content.MCRFileContent;
import org.mycore.common.content.MCRStreamContent;
import org.mycore.common.content.MCRURLContent;
import com.ibm.icu.util.StringTokenizer;
/**
* @author Thomas Scheffler (yagee)
* @since 2013.12
*/
public class MCRDefaultConfigurationLoader implements MCRConfigurationLoader {
MCRProperties properties, deprecated;
public MCRDefaultConfigurationLoader() {
properties = new MCRProperties();
try (InputStream in = getConfigInputStream()) {
loadFromContent(new MCRStreamContent(in));
} catch (IOException e) {
throw new MCRConfigurationException("Could not load MyCoRe properties.", e);
}
deprecated = new MCRProperties();
try (InputStream in = getDeprecatedConfigInputStream()) {
deprecated.load(in);
} catch (IOException e) {
throw new MCRConfigurationException("Could not load deprecated MyCoRe properties.", e);
}
}
private InputStream getConfigInputStream() throws IOException {
MCRConfigurationInputStream configurationInputStream = MCRConfigurationInputStream
.getMyCoRePropertiesInstance();
File configFile = MCRConfigurationDir.getConfigFile("mycore.active.properties");
if (configFile != null) {
FileOutputStream fout = new FileOutputStream(configFile);
return new TeeInputStream(configurationInputStream, fout, true);
}
return configurationInputStream;
}
private InputStream getDeprecatedConfigInputStream() throws IOException {
MCRConfigurationInputStream deprecatedInputStream = new MCRConfigurationInputStream("deprecated.properties");
File configFile = MCRConfigurationDir.getConfigFile("deprecated.active.properties");
if (configFile != null) {
FileOutputStream fout = new FileOutputStream(configFile);
return new TeeInputStream(deprecatedInputStream, fout, true);
}
return deprecatedInputStream;
}
@Override
public Map load() {
return properties.getAsMap();
}
@Override
public Map loadDeprecated() {
return deprecated.getAsMap();
}
/**
* Loads configuration properties from a specified properties file and adds
* them to the properties currently set. This method scans the
* CLASSPATH
for the properties file, it may be a plain file, but
* may also be located in a zip or jar file. If the properties file contains
* a property called MCR.Configuration.Include
, the files
* specified in that property will also be read. Multiple include files have
* to be separated by spaces or colons.
*
* @param filename
* the properties file to be loaded
* @throws MCRConfigurationException
* if the file can not be loaded
*/
private void loadFromFile(String filename) {
File mycoreProperties = new File(filename);
MCRContent input = null;
try {
if (mycoreProperties.canRead()) {
input = new MCRFileContent(mycoreProperties);
} else {
URL url = this.getClass().getResource("/" + filename);
if (url == null) {
throw new MCRConfigurationException("Could not find file or resource:" + filename);
}
input = new MCRURLContent(url);
}
loadFromContent(input);
} catch (IOException e) {
String name = input == null ? filename : input.getSystemId();
throw new MCRConfigurationException("Could not load configuration from: " + name, e);
}
}
private void loadFromContent(MCRContent input) throws IOException {
try (InputStream in = input.getInputStream()) {
properties.load(in);
}
String include = properties.getProperty("MCR.Configuration.Include", null);
if (include != null) {
StringTokenizer st = new StringTokenizer(include, ", ");
properties.remove("MCR.Configuration.Include");
while (st.hasMoreTokens()) {
loadFromFile(st.nextToken());
}
}
}
}