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/*
* This software is released under a licence similar to the Apache Software Licence.
* See org.logicalcobwebs.proxool.package.html for details.
* The latest version is available at http://proxool.sourceforge.net
*/
package org.logicalcobwebs.proxool.admin.jmx;
import org.logicalcobwebs.proxool.ConnectionPoolDefinitionIF;
import org.logicalcobwebs.proxool.ProxoolFacade;
import org.logicalcobwebs.proxool.ProxoolConstants;
import org.logicalcobwebs.proxool.ProxoolException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.ObjectName;
import javax.management.MalformedObjectNameException;
import java.util.Properties;
import java.util.ArrayList;
import java.util.StringTokenizer;
import java.util.List;
/**
* Utilities for Proxool JMX instrumentation.
* @version $Revision: 1.7 $, $Date: 2006/01/18 14:39:56 $
* @author Christian Nedregaard ([email protected])
* @author $Author: billhorsman $ (current maintainer)
* @since Proxool 0.8
*/
public class ProxoolJMXHelper {
private static final Log LOG = LogFactory.getLog(ProxoolJMXHelper.class);
private ProxoolJMXHelper() {
}
/**
* Create and register a {@link org.logicalcobwebs.proxool.admin.jmx.ConnectionPoolMBean} to the given agents.
* Will log errors instead of throwing exceptions if one or more of the registrations fails.
* @param poolPropeties the complete pool properties.
* @throws org.logicalcobwebs.proxool.ProxoolException if the pool can not be found.
*/
public static void registerPool(String alias, Properties poolPropeties) throws ProxoolException {
ConnectionPoolDefinitionIF connectionPoolDefinition =
ProxoolFacade.getConnectionPoolDefinition(alias);
String[] agentIds = getAgentIds(poolPropeties);
ArrayList servers = null;
for (int i = 0; i < agentIds.length; i++) {
servers = MBeanServerFactory.findMBeanServer(agentIds[i]);
if (servers == null || servers.size() < 1) {
LOG.error("Could not register pool " + connectionPoolDefinition.getAlias() + " for JMX instrumentation"
+ " because lookup of MBeanServer using agent id " + agentIds[i] + " failed.");
} else {
MBeanServer mBeanServer = (MBeanServer) servers.get(0);
ConnectionPoolMBean poolMBean = new ConnectionPoolMBean(alias, poolPropeties);
try {
mBeanServer.registerMBean(poolMBean, getObjectName(connectionPoolDefinition.getAlias()));
LOG.info("Registered JMX MBean for pool " + connectionPoolDefinition.getAlias() + " in agent " + agentIds[i]);
} catch (Exception e) {
LOG.error("Registration of JMX MBean for pool " + connectionPoolDefinition.getAlias()
+ "in agent " + agentIds[i] + " failed.", e);
}
}
}
}
/**
* Unregister a {@link org.logicalcobwebs.proxool.admin.jmx.ConnectionPoolMBean} from the given agents.
* Will log errors instead of throwing exceptions if one or more of the unregistrations fails.
* @param poolPropeties the complete pool properties.
*/
public static void unregisterPool(String alias, Properties poolPropeties) {
String[] agentIds = getAgentIds(poolPropeties);
ArrayList servers = null;
for (int i = 0; i < agentIds.length; i++) {
servers = MBeanServerFactory.findMBeanServer(agentIds[i]);
if (servers == null || servers.size() < 1) {
LOG.error("Could not unregister MBean for pool " + alias
+ " because lookup of MBeanServer using agent id " + agentIds[i] + " failed.");
} else {
MBeanServer mBeanServer = (MBeanServer) servers.get(0);
try {
mBeanServer.unregisterMBean(getObjectName(alias));
LOG.info("Unregistered JMX MBean for pool " + alias + " in agent " + agentIds[i]);
} catch (Exception e) {
LOG.error("Unregistration of JMX MBean for pool " + alias + "in agent "
+ agentIds[i] + " failed.", e);
}
}
}
}
/**
* Get the prefered JMX object name for a Proxool pool.
* @param alias the alias of the pool.
* @return the generated object name.
* @throws javax.management.MalformedObjectNameException if the creation of the object name fails.
*/
public static ObjectName getObjectName(String alias) throws MalformedObjectNameException {
return new ObjectName("Proxool:type=Pool, name=" + alias);
}
private static String[] getAgentIds(Properties poolPropeties) {
String idString = poolPropeties.getProperty(ProxoolConstants.JMX_AGENT_PROPERTY);
if (idString == null || idString.trim().equals("")) {
// null agent id means 'default agent'
return new String[]{null};
} else {
StringTokenizer tokenizer = new StringTokenizer(idString, ",");
List tokens = new ArrayList(3);
while (tokenizer.hasMoreElements()) {
tokens.add(tokenizer.nextToken().trim());
}
return (String[]) tokens.toArray(new String[tokens.size()]);
}
}
/**
* Generate a valid JMX identifier attribute name from a Proxool property name.
* This basically involves changing all occurences of -<char> to
* <uppercase char>.
* driver-properties will for instance become
* driverProperties.
* @param propertyName the name to be converted.
* @return the converted attribute name.
*/
public static String getValidIdentifier(String propertyName) {
if (propertyName.indexOf("-") == -1) {
return propertyName;
} else {
StringBuffer buffer = new StringBuffer (propertyName);
int index = -1;
while ((index = buffer.toString().indexOf("-")) > -1) {
buffer.deleteCharAt(index);
buffer.setCharAt(index, Character.toUpperCase(buffer.charAt(index)));
}
return buffer.toString();
}
}
}
/*
Revision history:
$Log: ProxoolJMXHelper.java,v $
Revision 1.7 2006/01/18 14:39:56 billhorsman
Unbundled Jakarta's Commons Logging.
Revision 1.6 2003/05/06 23:15:56 chr32
Moving JMX classes back in from sandbox.
Revision 1.1 2003/03/07 16:35:18 billhorsman
moved jmx stuff into sandbox until it is tested
Revision 1.4 2003/03/05 15:14:15 billhorsman
fix for jdk 1.2
Revision 1.3 2003/03/03 11:12:00 billhorsman
fixed licence
Revision 1.2 2003/02/26 19:05:03 chr32
Added utility methods.
Fixed mutiple servers bug.
Revision 1.1 2003/02/24 18:01:29 chr32
Rewrite and renamed: ProxoolJMXHelper.
Revision 1.1 2003/02/24 01:14:17 chr32
Init rev (unfinished).
*/