/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., 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.gatein.management.core.api;
import org.gatein.common.logging.Logger;
import org.gatein.common.logging.LoggerFactory;
import org.gatein.management.api.ManagedDescription;
import org.gatein.management.api.ManagedResource;
import org.gatein.management.api.PathAddress;
import org.gatein.management.api.PathAddressIterator;
import org.gatein.management.api.PathTemplateResolver;
import org.gatein.management.api.exceptions.ManagementException;
import org.gatein.management.api.operation.OperationHandler;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.regex.PatternSyntaxException;
/**
* @author <a href="mailto:nscavell@redhat.com">Nick Scavelli</a>
* @version $Revision$
*/
public class SimpleManagedResource extends AbstractManagedResource
{
private static final Logger log = LoggerFactory.getLogger(SimpleManagedResource.class);
private volatile ConcurrentMap<String, SimpleManagedResource> children = new ConcurrentHashMap<String, SimpleManagedResource>();
private volatile ConcurrentMap<String, OperationEntry> operations = new ConcurrentHashMap<String, OperationEntry>();
protected final ManagedDescription description;
public SimpleManagedResource(PathElement pathElement, AbstractManagedResource parent, ManagedDescription description)
{
super(pathElement, parent);
this.description = description;
}
//------------------------------- Registration Methods -------------------------------//
@Override
public Registration registerSubResource(String name, ManagedDescription description)
{
if (name == null) throw new IllegalArgumentException("name is null");
if (description == null) throw new IllegalArgumentException("description is null");
if (name.charAt(0) == '/') name = name.substring(1, name.length());
PathElement element;
try
{
element = PathElement.pathElement(name);
}
catch (PatternSyntaxException e)
{
throw new ManagementException("Could not parse path template " + name, e);
}
SimpleManagedResource resource = new SimpleManagedResource(element, this, description);
if (children.putIfAbsent(element.getValue(), resource) != null)
{
throw new IllegalArgumentException("Resource " + name + " already exists for path " + getPath());
}
return resource;
}
@Override
public void registerOperationHandler(String operationName, OperationHandler operationHandler, ManagedDescription description)
{
registerOperationHandler(operationName, operationHandler, description, false);
}
@Override
public void registerOperationHandler(String operationName, OperationHandler operationHandler, ManagedDescription description, boolean inherited)
{
if (operations.putIfAbsent(operationName, new OperationEntry(operationHandler, description, inherited)) != null)
{
throw new IllegalArgumentException("A handler is already registered for operation " + operationName + " at path " + getPath());
}
}
//------------------------------- Resource Descriptions -------------------------------//
@Override
protected ManagedDescription getResourceDescription(PathAddressIterator iterator)
{
if (iterator.hasNext())
{
String name = iterator.next();
AbstractManagedResource resource = findDescendant(iterator, name, new StringBuilder());
return (resource != null) ? resource.getResourceDescription(iterator) : null;
}
else
{
return description;
}
}
//------------------------------- Operation information -------------------------------//
@Override
protected OperationEntry getOperationEntry(PathAddressIterator iterator, String operationName)
{
if (operationName == null) return null;
OperationEntry entry = operations.get(operationName);
if (iterator.hasNext())
{
String name = iterator.next();
AbstractManagedResource resource = findDescendant(iterator, name, new StringBuilder());
return (resource != null) ? resource.getOperationEntry(iterator, operationName) : null;
}
else
{
if (entry == null)
{
AbstractManagedResource parent = this.parent;
while (parent != null)
{
OperationEntry parentEntry = parent.getOperationEntry(PathAddressIterator.EMPTY, operationName);
if (parentEntry != null && parentEntry.isInherited())
{
entry = parentEntry;
break;
}
parent = parent.parent;
}
}
return entry;
}
}
@Override
protected void getOperationEntries(PathAddressIterator iterator, Map<String, OperationEntry> entries)
{
if (iterator.hasNext())
{
String name = iterator.next();
AbstractManagedResource resource = findDescendant(iterator, name, new StringBuilder());
if (resource != null)
{
resource.getOperationEntries(iterator, entries);
}
}
else
{
for (Map.Entry<String, OperationEntry> entry : operations.entrySet())
{
entries.put(entry.getKey(), entry.getValue());
}
AbstractManagedResource parent = this.parent;
while (parent != null)
{
Map<String, OperationEntry> parentMap = new HashMap<String, OperationEntry>();
parent.getOperationEntries(PathAddress.empty().iterator(), parentMap);
for (Map.Entry<String, OperationEntry> entry : parentMap.entrySet())
{
if (entry.getValue().isInherited() && !entries.containsKey(entry.getKey()))
{
entries.put(entry.getKey(), entry.getValue());
}
}
parent = parent.parent;
}
}
}
//------------------------------- SubResource information -------------------------------//
@Override
protected AbstractManagedResource getSubResource(PathAddressIterator iterator)
{
if (iterator.hasNext())
{
String name = iterator.next();
AbstractManagedResource resource = findDescendant(iterator, name, new StringBuilder());
return (resource != null) ? resource.getSubResource(iterator) : null;
}
else
{
return this;
}
}
@Override
public ManagedResource getSubResource(String childName)
{
return children.get(childName);
}
@Override
protected Set<String> getChildNames(PathAddressIterator iterator)
{
if (iterator.hasNext())
{
String name = iterator.next();
AbstractManagedResource resource = findDescendant(iterator, name, new StringBuilder());
return (resource == null) ? Collections.<String>emptySet() : resource.getChildNames(iterator);
}
else
{
return Collections.unmodifiableSet(new HashSet<String>(children.keySet()));
}
}
//------------------------------- Private stuff -------------------------------//
private AbstractManagedResource findDescendant(PathAddressIterator iterator, String childName, StringBuilder path)
{
AbstractManagedResource child = children.get(childName);
while (child == null)
{
path.append("/").append(childName);
child = findMatch(iterator, path);
if (iterator.hasNext())
{
child = findDescendant(iterator, iterator.next(), path);
}
else
{
break;
}
}
return child;
}
private AbstractManagedResource findMatch(PathAddressIterator iterator, final StringBuilder path)
{
for (final SimpleManagedResource resource : children.values())
{
if (resource.pathElement.matches(path.toString()))
{
PathAddressIterator pai = new PathAddressIterator(iterator.currentAddress());
StringBuilder sb = new StringBuilder(path);
while (pai.hasNext())
{
String next = pai.next();
sb.append("/").append(next);
if (resource.pathElement.matches(sb.toString()))
{
AbstractManagedResource found = resource.findMatch(pai, new StringBuilder(next));
if (found == null)
{
path.append("/").append(next);
iterator.next();
}
else
{
break;
}
}
else
{
break;
}
}
iterator.originalAddress().addPathTemplateResolver(
new PathTemplateResolverImpl(resource.pathElement, path.toString()));
if (iterator.hasNext())
{
pai = new PathAddressIterator(iterator.currentAddress().copy());
AbstractManagedResource subResource = resource.getSubResource(pai);
if (subResource != null)
{
PathAddress address = pai.originalAddress();
for (PathTemplateResolver resolver : address.getPathTemplateResolvers())
{
iterator.originalAddress().addPathTemplateResolver(resolver);
}
while(iterator.hasNext()) iterator.next();
return subResource;
}
}
else
{
return resource;
}
}
}
return null;
}
private static class PathTemplateResolverImpl implements PathTemplateResolver
{
private PathElement pathElement;
private String path;
public PathTemplateResolverImpl(PathElement pathElement, String path)
{
this.pathElement = pathElement;
this.path = path;
}
@Override
public String resolve(String templateName)
{
return pathElement.resolve(templateName, path);
}
}
}