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org.apache.tomcat.util.modeler.modules.MbeansDescriptorsIntrospectionSource Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tomcat.util.modeler.modules;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.List;
import javax.management.ObjectName;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.modeler.AttributeInfo;
import org.apache.tomcat.util.modeler.ManagedBean;
import org.apache.tomcat.util.modeler.OperationInfo;
import org.apache.tomcat.util.modeler.ParameterInfo;
import org.apache.tomcat.util.modeler.Registry;
public class MbeansDescriptorsIntrospectionSource extends ModelerSource
{
private static final Log log = LogFactory.getLog(MbeansDescriptorsIntrospectionSource.class);
Registry registry;
String location;
String type;
Object source;
List mbeans = new ArrayList();
public void setRegistry(Registry reg) {
this.registry=reg;
}
public void setLocation( String loc ) {
this.location=loc;
}
/** Used if a single component is loaded
*
* @param type
*/
public void setType( String type ) {
this.type=type;
}
public void setSource( Object source ) {
this.source=source;
}
@Override
public List loadDescriptors( Registry registry, String location,
String type, Object source) throws Exception {
setRegistry(registry);
setLocation(location);
setType(type);
setSource(source);
execute();
return mbeans;
}
public void execute() throws Exception {
if( registry==null ) registry=Registry.getRegistry(null, null);
try {
ManagedBean managed = createManagedBean(registry, null,
(Class)source, type);
if( managed==null ) return;
managed.setName( type );
registry.addManagedBean(managed);
} catch( Exception ex ) {
log.error( "Error reading descriptors ", ex);
}
}
// ------------ Implementation for non-declared introspection classes
static Hashtable specialMethods =
new Hashtable();
static {
specialMethods.put( "preDeregister", "");
specialMethods.put( "postDeregister", "");
}
private static String strArray[]=new String[0];
private static ObjectName objNameArray[]=new ObjectName[0];
// createMBean == registerClass + registerMBean
private static Class[] supportedTypes = new Class[] {
Boolean.class,
Boolean.TYPE,
Byte.class,
Byte.TYPE,
Character.class,
Character.TYPE,
Short.class,
Short.TYPE,
Integer.class,
Integer.TYPE,
Long.class,
Long.TYPE,
Float.class,
Float.TYPE,
Double.class,
Double.TYPE,
String.class,
strArray.getClass(),
BigDecimal.class,
BigInteger.class,
ObjectName.class,
objNameArray.getClass(),
java.io.File.class,
};
/**
* Check if this class is one of the supported types.
* If the class is supported, returns true. Otherwise,
* returns false.
* @param ret The class to check
* @return boolean True if class is supported
*/
private boolean supportedType(Class ret) {
for (int i = 0; i < supportedTypes.length; i++) {
if (ret == supportedTypes[i]) {
return true;
}
}
if (isBeanCompatible(ret)) {
return true;
}
return false;
}
/**
* Check if this class conforms to JavaBeans specifications.
* If the class is conformant, returns true.
*
* @param javaType The class to check
* @return boolean True if the class is compatible.
*/
protected boolean isBeanCompatible(Class javaType) {
// Must be a non-primitive and non array
if (javaType.isArray() || javaType.isPrimitive()) {
return false;
}
// Anything in the java or javax package that
// does not have a defined mapping is excluded.
if (javaType.getName().startsWith("java.") ||
javaType.getName().startsWith("javax.")) {
return false;
}
try {
javaType.getConstructor(new Class[]{});
} catch (java.lang.NoSuchMethodException e) {
return false;
}
// Make sure superclass is compatible
Class superClass = javaType.getSuperclass();
if (superClass != null &&
superClass != java.lang.Object.class &&
superClass != java.lang.Exception.class &&
superClass != java.lang.Throwable.class) {
if (!isBeanCompatible(superClass)) {
return false;
}
}
return true;
}
/**
* Process the methods and extract 'attributes', methods, etc
*
* @param realClass The class to process
* @param methods The methods to process
* @param attMap The attribute map (complete)
* @param getAttMap The readable attributes map
* @param setAttMap The settable attributes map
* @param invokeAttMap The invokable attributes map
*/
private void initMethods(Class realClass,
Method methods[],
Hashtable attMap,
Hashtable getAttMap,
Hashtable setAttMap,
Hashtable invokeAttMap)
{
for (int j = 0; j < methods.length; ++j) {
String name=methods[j].getName();
if( Modifier.isStatic(methods[j].getModifiers()))
continue;
if( ! Modifier.isPublic( methods[j].getModifiers() ) ) {
if( log.isDebugEnabled())
log.debug("Not public " + methods[j] );
continue;
}
if( methods[j].getDeclaringClass() == Object.class )
continue;
Class params[] = methods[j].getParameterTypes();
if( name.startsWith( "get" ) && params.length==0) {
Class ret = methods[j].getReturnType();
if( ! supportedType( ret ) ) {
if( log.isDebugEnabled() )
log.debug("Unsupported type " + methods[j]);
continue;
}
name=unCapitalize( name.substring(3));
getAttMap.put( name, methods[j] );
// just a marker, we don't use the value
attMap.put( name, methods[j] );
} else if( name.startsWith( "is" ) && params.length==0) {
Class ret = methods[j].getReturnType();
if( Boolean.TYPE != ret ) {
if( log.isDebugEnabled() )
log.debug("Unsupported type " + methods[j] + " " + ret );
continue;
}
name=unCapitalize( name.substring(2));
getAttMap.put( name, methods[j] );
// just a marker, we don't use the value
attMap.put( name, methods[j] );
} else if( name.startsWith( "set" ) && params.length==1) {
if( ! supportedType( params[0] ) ) {
if( log.isDebugEnabled() )
log.debug("Unsupported type " + methods[j] + " " + params[0]);
continue;
}
name=unCapitalize( name.substring(3));
setAttMap.put( name, methods[j] );
attMap.put( name, methods[j] );
} else {
if( params.length == 0 ) {
if( specialMethods.get( methods[j].getName() ) != null )
continue;
invokeAttMap.put( name, methods[j]);
} else {
boolean supported=true;
for( int i=0; i realClass, String type)
{
ManagedBean mbean= new ManagedBean();
Method methods[]=null;
Hashtable attMap = new Hashtable();
// key: attribute val: getter method
Hashtable getAttMap = new Hashtable();
// key: attribute val: setter method
Hashtable setAttMap = new Hashtable();
// key: operation val: invoke method
Hashtable invokeAttMap = new Hashtable();
methods = realClass.getMethods();
initMethods(realClass, methods, attMap, getAttMap, setAttMap, invokeAttMap );
try {
Enumeration en = attMap.keys();
while( en.hasMoreElements() ) {
String name = en.nextElement();
AttributeInfo ai=new AttributeInfo();
ai.setName( name );
Method gm = getAttMap.get(name);
if( gm!=null ) {
//ai.setGetMethodObj( gm );
ai.setGetMethod( gm.getName());
Class t=gm.getReturnType();
if( t!=null )
ai.setType( t.getName() );
}
Method sm = setAttMap.get(name);
if( sm!=null ) {
//ai.setSetMethodObj(sm);
Class t = sm.getParameterTypes()[0];
if( t!=null )
ai.setType( t.getName());
ai.setSetMethod( sm.getName());
}
ai.setDescription("Introspected attribute " + name);
if( log.isDebugEnabled()) log.debug("Introspected attribute " +
name + " " + gm + " " + sm);
if( gm==null )
ai.setReadable(false);
if( sm==null )
ai.setWriteable(false);
if( sm!=null || gm!=null )
mbean.addAttribute(ai);
}
en=invokeAttMap.keys();
while( en.hasMoreElements() ) {
String name = en.nextElement();
Method m = invokeAttMap.get(name);
if( m!=null && name != null ) {
OperationInfo op=new OperationInfo();
op.setName(name);
op.setReturnType(m.getReturnType().getName());
op.setDescription("Introspected operation " + name);
Class parms[] = m.getParameterTypes();
for(int i=0; i
