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* Copyright 2000 - 2008, 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.infinispan.config;
import org.infinispan.factories.scopes.Scope;
import org.infinispan.factories.scopes.Scopes;
import org.infinispan.util.TypedProperties;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.LinkedList;
import java.util.List;
import java.util.Locale;
import java.util.Properties;
/**
* Base superclass of Cache configuration classes that expose some properties that can be changed after the cache is
* started.
*
* @author <a href="brian.stansberry@jboss.com">Brian Stansberry</a>
* @see #testImmutability(String)
* @since 4.0
*/
@Scope(Scopes.NAMED_CACHE)
public abstract class AbstractConfigurationBean implements CloneableConfigurationComponent {
private static final long serialVersionUID = 4879873994727821938L;
protected static final TypedProperties EMPTY_PROPERTIES = new TypedProperties();
protected transient Log log = LogFactory.getLog(getClass());
// private transient CacheSPI cache; // back-reference to test whether the cache is running.
// private transient ComponentRegistry cr;
// a workaround to get over immutability checks
private boolean accessible;
protected List<String> overriddenConfigurationElements = new LinkedList<String>();
protected AbstractConfigurationBean() {
}
// public void passCacheToChildConfig(AbstractConfigurationBean child) {
// if (child != null) {
// child.setCache(cache);
// }
// }
// protected void addChildConfig(AbstractConfigurationBean child) {
// if (child != null) children.add(child);
// if (child != null && children.add(child))
// child.setCache(cache);
// }
// protected void addChildConfigs(Collection<? extends AbstractConfigurationBean> toAdd) {
// if (toAdd != null) {
// for (AbstractConfigurationBean child : toAdd)
// addChildConfig(child);
// }
// }
//
// protected void removeChildConfig(AbstractConfigurationBean child) {
// children.remove(child);
// }
// protected void removeChildConfigs(Collection<? extends AbstractConfigurationBean> toRemove) {
// if (toRemove != null) {
// for (AbstractConfigurationBean child : toRemove)
// removeChildConfig(child);
// }
// }
//
// protected void replaceChildConfig(AbstractConfigurationBean oldConfig, AbstractConfigurationBean newConfig) {
// removeChildConfig(oldConfig);
// addChildConfig(newConfig);
// }
// protected void replaceChildConfigs(Collection<? extends AbstractConfigurationBean> oldConfigs,
// Collection<? extends AbstractConfigurationBean> newConfigs) {
// synchronized (children) {
// removeChildConfigs(oldConfigs);
// addChildConfigs(newConfigs);
// }
// }
/**
* Safely converts a String to upper case.
*
* @param s string to convert
* @return the string in upper case, or null if s is null.
*/
protected String uc(String s) {
return s == null ? null : s.toUpperCase(Locale.ENGLISH);
}
/**
* Converts a given {@link Properties} instance to an instance of {@link TypedProperties}
*
* @param p properties to convert
* @return TypedProperties instance
*/
protected TypedProperties toTypedProperties(Properties p) {
return TypedProperties.toTypedProperties(p);
}
protected TypedProperties toTypedProperties(String s) {
TypedProperties tp = new TypedProperties();
if (s != null && s.trim().length() > 0) {
InputStream stream = new ByteArrayInputStream(s.getBytes());
try {
tp.load(stream);
} catch (IOException e) {
throw new ConfigurationException("Unable to parse properties string " + s, e);
}
}
return tp;
}
/**
* Tests whether the component this configuration bean intents to configure has already started.
*
* @return true if the component has started; false otherwise.
*/
protected abstract boolean hasComponentStarted();
/**
* Checks field modifications via setters
*
* @param fieldName
*/
protected void testImmutability(String fieldName) {
try {
if (!accessible && hasComponentStarted() && !getClass().getDeclaredField(fieldName).isAnnotationPresent(Dynamic.class)) {
throw new ConfigurationException("Attempted to modify a non-Dynamic configuration element [" + fieldName + "] after the component has started!");
}
}
catch (NoSuchFieldException e) {
log.warn("Field " + fieldName + " not found!!");
}
finally {
accessible = false;
}
// now mark this as overridden
overriddenConfigurationElements.add(fieldName);
}
// public void setCache(CacheSPI cache) {
// this.cache = cache;
// synchronized (children) {
// for (AbstractConfigurationBean child : children) {
// child.setCache(cache);
// }
// }
// }
// @Start
// private void start() {
// setCache(cr.getComponent(CacheSPI.class));
// }
@Override
public CloneableConfigurationComponent clone() throws CloneNotSupportedException {
AbstractConfigurationBean c = (AbstractConfigurationBean) super.clone();
// c.setCache(null);
return c;
}
}