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/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
package com.sun.mfwk.agent.appserv.util;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Iterator;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.w3c.dom.Document;
import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.IOException;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import javax.xml.parsers.ParserConfigurationException;
import com.sun.mfwk.agent.appserv.logging.LogDomains;
import com.sun.mfwk.agent.appserv.ASEntityResolver;
/**
* Utility helper class.
*/
public class Utils {
/**
* Returns the parsed document object.
*
* @param url url to the xml descriptor file
* @param defaultLocation default location
* @throws IOException if an i/o error
*
* @return document object
*/
public static Document getDocument(String url, String defaultLocation)
throws IOException {
Document doc = null;
InputStream in = null;
try {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
db.setEntityResolver(new ASEntityResolver());
try {
ClassLoader cl = (Utils.class).getClassLoader();
in = cl.getResourceAsStream(url);
} catch (Exception e) {
// ignore
}
if (in == null) {
in = new FileInputStream(defaultLocation+url);
}
doc = db.parse(in);
} catch (ParserConfigurationException e) {
throw new IOException(e.getMessage());
} catch (SAXParseException e) {
throw new IOException(e.getMessage());
} catch (SAXException e) {
throw new IOException(e.getMessage());
} finally {
if (in != null) {
try {
in.close();
} catch (Exception ex) { }
}
}
return doc;
}
/**
* Gets an input stream for the given file.
*
* @param relativeFilePath the relative path name of the file.
*
* @return InputStream the input stream for the given file; returns null
* in case of failure.
*/
public static InputStream getInputStream(String relativeFilePath) {
if (relativeFilePath == null){
throw new IllegalArgumentException();
}
ClassLoader cl = (Utils.class).getClassLoader();
return cl.getResourceAsStream(relativeFilePath);
}
/**
* Returns only first occurence, from beginsWith to endsWith or till end
*/
public static String getStringRegion(String source, String beginsWith,
String endsWith) {
String region = null;
int beginIndex = source.indexOf(beginsWith);
if (beginIndex >= 0) {
int endIndex =
source.indexOf(endsWith, beginIndex + beginsWith.length());
if (endIndex < 0) {
endIndex = source.length();
}
region = source.substring(beginIndex+beginsWith.length(), endIndex);
}
return region;
}
public boolean isDAS(String serverName) {
return Constants.ADMIN_SERVER_NAME.equals(serverName);
}
public static void log(Level level, String message, Exception e) {
Logger logger = LogDomains.getLogger();
if (logger != null) {
logger.log(level, message, e);
}
}
public static void log(Level level, String message) {
Logger logger = LogDomains.getLogger();
if (logger != null) {
logger.log(level, message);
}
}
/**
* Gets a sum of values of an attribute from the given set of mbeans.
*
* @param connection the given mbean server connection.
* @param objectNames the given set of mbeans on the given server connection.
* @param attribute the given attribute, value of which is fetched from each
* of the mbean in the given set.
*
* @return long the sum of attribute values fetched from each of the mbean in
* the given set.
*/
public static long getAttributeSum(MBeanServerConnection connection,
Set objectNames, String attribute) {
long attributeSum = 0;
Iterator iter = objectNames.iterator();
ObjectName objectName = null;
Long attributeValue;
while (iter.hasNext()) {
objectName = (ObjectName) iter.next();
try {
attributeValue = (Long) connection.getAttribute(objectName, attribute);
} catch (Exception exception) {
Utils.log(Level.WARNING, "Error getting attribute, " +
attribute + " of" + objectName, exception);
continue;
}
attributeSum = attributeSum + attributeValue.longValue();
}
return attributeSum;
}
}