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This module contains the Metro runtime code.
/*
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*
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package org.glassfish.gmbal.generic;
import java.util.Map;
import java.util.WeakHashMap;
/** Contains various factory methods for constructing MethodMonitors,
*
* @author ken_admin
*/
public class MethodMonitorFactory {
private MethodMonitorFactory() {}
private abstract static class MethodMonitorBase implements MethodMonitor {
private String name ;
MethodMonitorBase( String name ) {
this.name = name ;
}
@Override
public String toString() {
return name ;
}
public abstract void enter(boolean enabled, String name,
Object... args) ;
public void info( boolean enabled, Object... args) {
// Default does nothing: override if used
}
public abstract void exit( boolean enabled, Object result) ;
public void exit( boolean enabled ) {
exit( enabled, null ) ;
}
public void clear() {
// No-op
}
}
private static final MethodMonitor noopImpl = new MethodMonitorBase(
"NoOpImpl" ) {
@Override
public void enter(boolean enabled, String name, Object... args) {
// No-op
}
@Override
public void exit( boolean enabled, Object result) {
// No-op
}
} ;
public static MethodMonitor getNoOp() {
return noopImpl ;
}
public static MethodMonitor compose( final MethodMonitor... mms) {
return new MethodMonitorBase( "ComposeImpl" ) {
@Override
public void enter(boolean enabled, String name, Object... args) {
for (MethodMonitor mm : mms ) {
mm.enter( enabled, name, args ) ;
}
}
@Override
public void info( boolean enabled, Object... args ) {
for (MethodMonitor mm : mms ) {
mm.info( enabled, args ) ;
}
}
@Override
public void exit(boolean enabled, Object result) {
for (MethodMonitor mm : mms ) {
mm.exit( enabled, result ) ;
}
}
} ;
}
public static final MethodMonitor operationTracer = new MethodMonitorBase(
"OperationTracer" ) {
@Override
public void enter(boolean enabled, String name, Object... args) {
OperationTracer.enter( name, args ) ;
}
@Override
public void exit( boolean enabled, Object result) {
OperationTracer.exit();
}
@Override
public void clear() {
OperationTracer.clear() ;
}
} ;
public static MethodMonitor dprintUtil( final Class cls ) {
final DprintUtil dputil = DprintUtil.getDprintUtil( cls ) ;
return new MethodMonitorBase( "DprintUtil" ) {
@Override
public void enter(boolean enabled, String name, Object... args) {
if (enabled) {
dputil.enter( name, args ) ;
}
}
@Override
public void info( boolean enabled, Object... args ) {
if (enabled) {
dputil.info( args ) ;
}
}
@Override
public void exit(boolean enabled, Object result) {
if (enabled) {
dputil.exit( result ) ;
}
}
} ;
}
// This is the same as compose( operationTracer, dprintUtil ), but
// it is created so often that this avoid some significant overhead.
private static MethodMonitor standardImpl( final Class cls ) {
final DprintUtil dputil = DprintUtil.getDprintUtil( cls ) ;
return new MethodMonitorBase( "StandardImpl" ) {
@Override
public void enter(boolean enabled, String name, Object... args) {
OperationTracer.enter( name, args ) ;
if (enabled) {
dputil.enter( name, args ) ;
}
}
@Override
public void info( boolean enabled, Object... args ) {
if (enabled) {
dputil.info( args ) ;
}
}
@Override
public void exit(boolean enabled, Object result) {
OperationTracer.exit();
if (enabled) {
dputil.exit( result ) ;
}
}
@Override
public void clear() {
OperationTracer.clear() ;
}
} ;
}
private static Map,MethodMonitor> stdMap =
new WeakHashMap,MethodMonitor>() ;
public static MethodMonitor makeStandard( Class cls ) {
MethodMonitor result = stdMap.get( cls ) ;
if (result == null) {
result = standardImpl( cls ) ;
stdMap.put( cls, result ) ;
}
return result ;
}
}