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Glassfish example source code file (EJBMethodStatsManagerImpl.java)

This example Glassfish source code file (EJBMethodStatsManagerImpl.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Glassfish tags/keywords

ejbmethodstatsimpl, ejbmethodstatsmanagerimpl, exception, hashmap, hashmap, log, logging, methodmonitor, methodmonitor, monitoredobjecttype, monitoringregistrationexception, object, object, reflection, registered, string, string, util

The Glassfish EJBMethodStatsManagerImpl.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.ejb.base.stats;

import com.sun.ejb.spi.stats.EJBMethodStatsManager;
import com.sun.enterprise.admin.monitor.registry.MonitoredObjectType;
import com.sun.enterprise.admin.monitor.registry.MonitoringRegistrationException;
import com.sun.enterprise.admin.monitor.registry.MonitoringRegistry;

import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.logging.Level;
import java.util.logging.Logger;


/**
 * A class that manages all the monitored EJB methods
 *
 * @author Mahesh Kannan
 *
 */

public final class EJBMethodStatsManagerImpl
    implements EJBMethodStatsManager
{
    private Logger _logger;

    private MonitoringRegistry		registry;

    private final String			appName;
    private final String			modName;
    private final String			ejbName;
    private final MonitoredObjectType ejbType;

    private Method[]			methods;
    private boolean			methodMonitorOn;
    

    private MethodMonitor[]		methodMonitors;
    private HashMap			methodMonitorMap;
    private Object			lock = new Object();
    private Object[]			logParams = null;

    private boolean prefixWithClassName;
    
    EJBMethodStatsManagerImpl(MonitoringRegistry registry, 
	    MonitoredObjectType ejbType, String ejbName, String modName, String appName)
    {
	this.registry = registry;
    
    this.ejbType   = ejbType;

	this.ejbName = ejbName;
	this.modName = modName;
	this.appName = appName;

	logParams = new Object[] {ejbName, modName, appName};
    }

    public final boolean isMethodMonitorOn() {
	return methodMonitorOn;
    }

    public final void preInvoke(Method method) {
	if (methodMonitorOn) {
	    MethodMonitor monitor = null;
	    synchronized (lock) {
		if (methodMonitorOn) {
		    monitor = (MethodMonitor) methodMonitorMap.get(method);
		}
	    }
	    if (monitor != null) {
            monitor.preInvoke();
	    }
	}
    }

    public final void postInvoke(Method method, Throwable th) {
	if (methodMonitorOn) {
	    MethodMonitor monitor = null;
	    synchronized (lock) {
		if (methodMonitorOn) {
		    monitor = (MethodMonitor) methodMonitorMap.get(method);
		}
	    }
	    if (monitor != null) {
		monitor.postInvoke(th);
	    }
	}
    }

    public MethodMonitor[]  getMethodMonitors() {
	return this.methodMonitors;
    }

    public void undeploy() {
	synchronized (lock) {
	    methodMonitorOn = false;
	}
	deregisterStats();

	methods = null;
	methodMonitors = null;
	methodMonitorMap = null;
	registry = null;
    }
    
    void registerMethods(Method[] methods, boolean prefixWithClassName) {
        this.prefixWithClassName = prefixWithClassName;
        this.methods = methods;
    }
    
    void setMethodMonitorOn(boolean monitorOn) {
	if (methods == null) {
	    _logger.log(Level.WARNING, "base.stats.method.nomethods", logParams);
	    return;
	}
	int size = methods.length;
	if (monitorOn == true) {
	    this.methodMonitors = new MethodMonitor[size];
	    HashMap map = new HashMap();
	    for (int i=0; i<size; i++) {
		methodMonitors[i] = new MethodMonitor(methods[i], prefixWithClassName);
		map.put(methods[i], methodMonitors[i]);

		EJBMethodStatsImpl impl =
		    new EJBMethodStatsImpl(methodMonitors[i]);
		try {
		    if (_logger.isLoggable(Level.FINE)) {
			_logger.log(Level.FINE, "Registering method: "
			    + methodMonitors[i].getMethodName()
			    + "; for " + appName + "; " + modName
			    + "; " + ejbName);
		    }
		    registry.registerEJBMethodStats(impl, 
			methodMonitors[i].getMethodName(),
			ejbType, ejbName, modName, appName, null);
		    if (_logger.isLoggable(Level.FINE)) {
			_logger.log(Level.FINE, "Registered method: "
			    + methodMonitors[i].getMethodName()
			    + "; for " + appName + "; " + modName
			    + "; " + ejbName);
		    }
		} catch (MonitoringRegistrationException monRegEx) {
		    Object[] params = new Object[] {ejbName, modName,
			    appName, methodMonitors[i].getMethodName()};
		    _logger.log(Level.WARNING,
			    "base.stats.method.register.monreg.error", params);
		    _logger.log(Level.FINE, "", monRegEx);
		} catch (Exception ex) {
		    Object[] params = new Object[] {ejbName, modName,
			    appName, methodMonitors[i].getMethodName()};
		    _logger.log(Level.WARNING,
			    "base.stats.method.register.error", params);
		    _logger.log(Level.FINE, "", ex);
		}
	    }
	    this.methodMonitorMap = map;
	    synchronized (lock) {
		this.methodMonitorOn = true;
	    }
	} else {
	    synchronized (lock) {
		this.methodMonitorOn = false;
	    }
	    deregisterStats();

	    this.methodMonitorMap = null;
	    this.methodMonitors = null;

	}
    }

    void appendStats(StringBuffer sbuf) {
	if (methodMonitors != null) {
	    int size = methods.length;
	    for (int i=0; i<size; i++) {
		MethodMonitor monitor =
		    (MethodMonitor) methodMonitors[i];
		monitor.appendStats(sbuf);
	    }
	}
    }

    private void deregisterStats() {
	if (methodMonitors == null) {
	    return;
	}
	int size = methodMonitors.length;
	for (int i=0; i<size; i++) {
	    try {
		registry.unregisterEJBMethodStats(
		    methodMonitors[i].getMethodName(),
		     ejbType, ejbName, modName, appName);
		if (_logger.isLoggable(Level.FINE)) {
		    _logger.log(Level.FINE, "Unregistered method: "
			    + methodMonitors[i].getMethodName()
			    + "; for " + appName + "; " + modName
			    + "; " + ejbName);
		}
	    } catch (MonitoringRegistrationException monRegEx) {
		Object[] params = new Object[] {ejbName, modName,
		    appName, methodMonitors[i].getMethodName()};
		_logger.log(Level.FINE,
			"base.stats.method.unregister.monreg.error", params);
		_logger.log(Level.FINE, "", monRegEx);
	    } catch (Exception ex) {
		Object[] params = new Object[] {ejbName, modName,
		    appName, methodMonitors[i].getMethodName()};
		_logger.log(Level.WARNING,
			"base.stats.method.unregister.error", params);
		_logger.log(Level.FINE, "", ex);
	    }
	}

	methodMonitors = null;
    }

}

Other Glassfish examples (source code examples)

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