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/*
* Copyright 2004-2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
*/
package com.sun.enterprise.management.support;
import java.util.Map;
import java.util.HashMap;
import java.util.Set;
import javax.management.ObjectName;
import javax.management.MBeanServer;
import javax.management.JMException;
import javax.management.MBeanInfo;
import javax.management.MBeanOperationInfo;
import com.sun.appserv.management.base.AMX;
import com.sun.appserv.management.base.XTypes;
import com.sun.appserv.management.base.SystemInfo;
import com.sun.appserv.management.base.Util;
import com.sun.appserv.management.util.misc.GSetUtil;
import com.sun.appserv.management.util.jmx.JMXUtil;
/**
*/
public final class SystemInfoImpl extends AMXImplBase
implements SystemInfo
{
private final MBeanServer mServer;
private BootUtil mBootUtil;
public static final String NAME_PROP_VALUE = "system-info";
private final Map<String,Boolean> mFeatures;
private final boolean
supportsClusters( )
{
final ObjectName serversObjectName = getOldServersMBeanObjectName();
boolean supportsClusters = false;
if ( serversObjectName != null )
{
// see if the 'servers' MBean supports listing unclustered instances
try
{
final MBeanInfo info = mServer.getMBeanInfo( serversObjectName );
final String operationName = "listUnclusteredServerInstancesAsString";
final Set operations = JMXUtil.findInfoByName( info.getOperations(), operationName );
supportsClusters = operations.size() != 0;
}
catch( JMException e )
{
// should never happen...
throw new RuntimeException( "problem with 'servers' MBean: " + serversObjectName, e );
}
}
else
{
// presumably, we're in another instance, which implies multiple instances.
// assume this also means clustering is possible
supportsClusters = true;
}
return( supportsClusters );
}
/*
<mbean name="hadb-config" group="config" className="com.sun.enterprise.ee.admin.mbeans.HadbConfigMBean">
<descriptor>
<field name="ObjectName" value="{0}:type=hadb-config,category=config"/>
</descriptor>
</mbean>
*/
private void checkHADBAvailable()
{
final boolean available = mServer.isRegistered(
com.sun.enterprise.admin.common.ObjectNames.getHADBConfigObjectName() );
mFeatures.put( HADB_CONFIG_FEATURE, Boolean.valueOf( available ) );
}
private void
_refresh()
{
checkHADBAvailable();
}
private static long LAST_REFRESH = 0;
private void
refresh()
{
final long REFRESH_MILLIS = 5 * 1000; // 5 seconds
final long elapsed = System.currentTimeMillis() - LAST_REFRESH;
if ( elapsed > REFRESH_MILLIS )
{
_refresh();
}
}
/**
Get the ObjectName of the "type=servers" MBean, which only exists in the DAS.
*/
private ObjectName
getOldServersMBeanObjectName()
{
// if we find the old "servers" MBean, it should only be running in the DAS.
final ObjectName pattern =
Util.newObjectName( "com.sun.appserv", "category=config,type=servers" );
final Set<ObjectName> serversSet = JMXUtil.queryNames( mServer, pattern, null );
final ObjectName objectName = serversSet.size() == 0 ?
null : (ObjectName)GSetUtil.getSingleton( serversSet );
return( objectName );
}
private boolean
isRunningInDomainAdminServer()
{
return( getOldServersMBeanObjectName() != null );
}
public
SystemInfoImpl(
final MBeanServer server,
final BootUtil bootUtil )
{
super( );
mServer = server;
mBootUtil = bootUtil;
mFeatures = new HashMap<String,Boolean>();
final boolean supportsClusters = supportsClusters( );
mFeatures.put( CLUSTERS_FEATURE, Boolean.valueOf( supportsClusters ));
mFeatures.put( MULTIPLE_SERVERS_FEATURE, Boolean.valueOf( supportsClusters ));
mFeatures.put( RUNNING_IN_DAS_FEATURE, Boolean.valueOf( isRunningInDomainAdminServer() ) );
}
public final String
getGroup()
{
return( AMX.GROUP_UTILITY );
}
private static final String[] FEATURE_NAMES =
new String[]
{
CLUSTERS_FEATURE,
MULTIPLE_SERVERS_FEATURE,
RUNNING_IN_DAS_FEATURE,
};
public String[]
getFeatureNames()
{
return( (String[])FEATURE_NAMES.clone() );
}
public boolean
supportsFeature( final String key )
{
boolean supports = false;
Boolean result = mFeatures.get( key );
if ( result == null )
{
result = Boolean.FALSE;
}
return( result.booleanValue() );
}
/**
Return a Map keyed by an arbitrary String denoting some feature. The value
is the time in milliseconds. Code should not rely on the keys as they are subject to
changes, additions, or removal at any time, except as otherwise documented.
Even documented items should be used only for informational purposes,
such as assessing performance.
@return Map<String,Long>
*/
public Map<String,Long>
getPerformanceMillis()
{
// ensure that we return a copy which is a HashMap, not some other variant of Map
final HashMap<String,Long> result = new HashMap<String,Long>();
result.putAll( SystemInfoData.getInstance().getPerformanceMillis() );
return result;
}
}
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