/*
* JBoss, Home of Professional Open Source.
* Copyright 2009, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ejb3.metrics.deployer;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.jboss.ejb3.statistics.InvocationStatistics;
import org.jboss.ejb3.statistics.InvocationStatistics.TimeStatistic;
import org.jboss.metatype.api.types.CompositeMetaType;
import org.jboss.metatype.api.types.ImmutableCompositeMetaType;
import org.jboss.metatype.api.types.MapCompositeMetaType;
import org.jboss.metatype.api.types.MetaType;
import org.jboss.metatype.api.types.SimpleMetaType;
import org.jboss.metatype.api.values.MapCompositeValueSupport;
import org.jboss.metatype.api.values.MetaValue;
import org.jboss.metatype.api.values.SimpleValueSupport;
import org.jboss.metatype.spi.values.MetaMapper;
/**
* InvocationStatisticMetaMapper
*
* {@link MetaMapper} for detyped EJB3 invocation statistics. This
* is to avoid dependence upon the EJB3 internal implementation
* classes in possible remote JVMs or outside ClassLoaders.
*
* @author Jason T. Greene
* @author <a href="mailto:andrew.rubinger@jboss.org">ALR</a>
* @version $Revision: $
*/
public class InvocationStatisticMetaMapper extends MetaMapper<InvocationStatistics>
{
// --------------------------------------------------------------------------------||
// Class Members ------------------------------------------------------------------||
// --------------------------------------------------------------------------------||
public static final CompositeMetaType TYPE;
public static final CompositeMetaType METHOD_STATS_TYPE;
private static String[] metaTypePropertyNames;
/**
* The composite type of the method stats; the value for the
* {@link InvocationStatisticMetaMapper#PROP_NAME_ROOT_METHOD_STATS}
* property
*/
private static MapCompositeMetaType VALUE_METHOD_STATS_MAP_TYPE;
/**
* Name of the "lastResetTime" property of the returned MetaValue
*/
private static final String PROP_NAME_ROOT_LAST_RESET_TIME = "lastResetTime";
/**
* Name of the "methodStats" property of the returned MetaValue
*/
private static final String PROP_NAME_ROOT_METHOD_STATS = "methodStats";
/**
* Name of the "count" property of the root MetaValue's "methodStats" property
*/
private static final String PROP_NAME_METHODSTATS_COUNT = "count";
/**
* Name of the "minTime" property of the root MetaValue's "methodStats" property
*/
private static final String PROP_NAME_METHODSTATS_MINTIME = "minTime";
/**
* Name of the "maxTime" property of the root MetaValue's "methodStats" property
*/
private static final String PROP_NAME_METHODSTATS_MAXTIME = "maxTime";
/**
* Name of the "totalTime" property of the root MetaValue's "methodStats" property
*/
private static final String PROP_NAME_METHODSTATS_TOTALTIME = "totalTime";
static
{
final String[] methodItemNames =
{PROP_NAME_METHODSTATS_COUNT, PROP_NAME_METHODSTATS_MINTIME, PROP_NAME_METHODSTATS_MAXTIME,
PROP_NAME_METHODSTATS_TOTALTIME};
final String[] methodItemDescriptions =
{"the number of invocations", "the minimum invocation time", "the maximum invocation time",
"the total invocation time",};
final MetaType[] methodItemTypes =
{SimpleMetaType.LONG, SimpleMetaType.LONG, SimpleMetaType.LONG, SimpleMetaType.LONG,};
METHOD_STATS_TYPE = new ImmutableCompositeMetaType("MethodStatistics", "Method invocation statistics",
methodItemNames, methodItemDescriptions, methodItemTypes);
VALUE_METHOD_STATS_MAP_TYPE = new MapCompositeMetaType(METHOD_STATS_TYPE);
metaTypePropertyNames = new String[]
{PROP_NAME_ROOT_LAST_RESET_TIME, PROP_NAME_ROOT_METHOD_STATS};
final String[] rootItemDescriptions =
{"last time statistics were reset", "method statistics",};
final MetaType[] rootItemTypes =
{SimpleMetaType.LONG, VALUE_METHOD_STATS_MAP_TYPE};
TYPE = new ImmutableCompositeMetaType("InvocationStatistics", "EJB3 invocation statistics",
metaTypePropertyNames, rootItemDescriptions, rootItemTypes);
}
/*
* (non-Javadoc)
* @see org.jboss.metatype.spi.values.MetaMapper#getMetaType()
*/
@Override
public MetaType getMetaType()
{
return TYPE;
}
/*
* (non-Javadoc)
* @see org.jboss.metatype.spi.values.MetaMapper#mapToType()
*/
@Override
public Type mapToType()
{
return InvocationStatistics.class;
}
/*
* (non-Javadoc)
* @see org.jboss.metatype.spi.values.MetaMapper#createMetaValue(org.jboss.metatype.api.types.MetaType, java.lang.Object)
*/
@Override
public MetaValue createMetaValue(MetaType metaType, InvocationStatistics object)
{
// Make the method map from the stats
final Map<String, MetaValue> methodMap = new HashMap<String, MetaValue>();
@SuppressWarnings("unchecked")
final Map<String, TimeStatistic> stats = (Map<String, TimeStatistic>) object.getStats();
if (stats != null)
{
final Set<String> methods = stats.keySet();
for (final String method : methods)
{
// Get the underlying time stat for this method
final TimeStatistic stat = stats.get(method);
// Create a composite view of the stat's state
final MapCompositeValueSupport cvs = new MapCompositeValueSupport(METHOD_STATS_TYPE);
cvs.put(PROP_NAME_METHODSTATS_COUNT, SimpleValueSupport.wrap(stat.count));
cvs.put(PROP_NAME_METHODSTATS_MAXTIME, SimpleValueSupport.wrap(stat.maxTime));
cvs.put(PROP_NAME_METHODSTATS_MINTIME, SimpleValueSupport.wrap(stat.minTime));
cvs.put(PROP_NAME_METHODSTATS_TOTALTIME, SimpleValueSupport.wrap(stat.totalTime));
// Add the stat to the method map
methodMap.put(method, cvs);
}
}
// Make a composite value for the returned MetaType
final MapCompositeValueSupport root = new MapCompositeValueSupport(TYPE);
// Set the properties
root.put(PROP_NAME_ROOT_LAST_RESET_TIME, SimpleValueSupport.wrap(object.lastResetTime));
root.put(PROP_NAME_ROOT_METHOD_STATS, new MapCompositeValueSupport(methodMap, VALUE_METHOD_STATS_MAP_TYPE));
// Return
return root;
}
/*
* (non-Javadoc)
* @see org.jboss.metatype.spi.values.MetaMapper#unwrapMetaValue(org.jboss.metatype.api.values.MetaValue)
*/
@Override
public InvocationStatistics unwrapMetaValue(MetaValue metaValue)
{
throw new UnsupportedOperationException(InvocationStatistics.class.getSimpleName() + " is a read-only property");
}
}