package com.choncms.config;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import javax.servlet.ServletContext;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class ConfigReader {
private static final Log log = LogFactory.getLog(ConfigReader.class);
private static final String SYS_PROPS_DIR = System
.getProperty("system-properties-dir");
private static final String SYS_PROPS_FILE_NAME = System.getProperty(
"system-properties", "system.properties");
public static File getSystemPropertiesDir() {
if(SYS_PROPS_DIR == null) {
return null;
}
File sysPropsDir = new File(SYS_PROPS_DIR);
if(!(sysPropsDir.exists() && sysPropsDir.isDirectory())) {
log.warn(" system-properties-dir " + sysPropsDir.getAbsolutePath() + " is not valid directory");
return null;
}
return sysPropsDir;
}
public static InputStream getSystemPropertiesInputStream(ServletContext servletContext) throws FileNotFoundException {
File sysPropsDir = getSystemPropertiesDir();
if(sysPropsDir == null) {
//from web-inf
log.info("Loading system properties ('"+SYS_PROPS_FILE_NAME+"') from WEB-INF");
return servletContext.getResourceAsStream("/WEB-INF/" + SYS_PROPS_FILE_NAME);
} else {
log.info("Loading system properties ('"+SYS_PROPS_FILE_NAME+"') from " + sysPropsDir.getAbsolutePath());
return new FileInputStream(new File(sysPropsDir, SYS_PROPS_FILE_NAME));
}
}
public static void readSystemProperties(ServletContext servletContext)
throws ConfigurationException, IOException {
InputStream propertiesInputStream = getSystemPropertiesInputStream(servletContext);
if (propertiesInputStream != null) {
PropertiesConfiguration properties = new PropertiesConfiguration();
properties.load(propertiesInputStream);
// TODO: put other useful properties
properties.setProperty("user.home", System.getProperty("user.home"));
if(!properties.containsKey("siteUrl")) {
properties.setProperty("siteUrl", servletContext.getContextPath());
}
initDefaultSystemProperties(properties);
copyToSystemProperties(properties);
if(log.isDebugEnabled()) {
log.debug(" ---------- Properties loaded ---------- ");
log.debug(properties);
log.debug(" ---------- ----------------- ---------- ");
}
propertiesInputStream.close();
} else {
throw new ConfigurationException(
" system properties file not found SYS_PROPS_DIR="
+ SYS_PROPS_DIR + "; SYS_PROPS_FILE_NAME="
+ SYS_PROPS_FILE_NAME);
}
}
private static void initDefaultSystemProperties(PropertiesConfiguration properties) {
System.setProperty("felix.fileinstall.dir", properties.getString("chon.dropins.dir"));
}
private static void copyToSystemProperties(PropertiesConfiguration properties) {
Iterator<?> it = properties.getKeys();
while (it.hasNext()) {
String k = (String) it.next();
String value = properties.getString(k);
System.getProperties().put(k, value);
}
}
}