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package com.sun.ejb.base.stats;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Set;
import com.sun.ejb.spi.stats.EJBMethodStatsManager;
import com.sun.enterprise.admin.monitor.registry.MonitoringRegistry;
import com.sun.enterprise.admin.monitor.registry.MonitoringLevel;
import com.sun.enterprise.admin.monitor.registry.MonitoringRegistrationException;
import com.sun.enterprise.admin.monitor.registry.MonitoredObjectType;
import java.util.logging.*;
import com.sun.enterprise.log.Log;
import com.sun.logging.*;
/**
* A class that manages all the monitored EJB methods
*
* @author Mahesh Kannan
*
*/
public final class EJBMethodStatsManagerImpl
implements EJBMethodStatsManager
{
private static final Logger _logger =
LogDomains.getLogger(LogDomains.EJB_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;
}
}
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