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* Copyright 2009 Red Hat Inc. and/or its affiliates and other
* contributors as indicated by the @author tags. All rights reserved.
* See the copyright.txt 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.atomic;
import org.infinispan.marshall.AbstractExternalizer;
import org.infinispan.marshall.Ids;
import org.infinispan.util.Util;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Changes that have occurred on an AtomicHashMap
*
* @author Manik Surtani (<a href="mailto:manik AT jboss DOT org">manik AT jboss DOT org</a>)
* @since 4.0
*/
public class AtomicHashMapDelta implements Delta {
private static final Log log = LogFactory.getLog(AtomicHashMapDelta.class);
private static final boolean trace = log.isTraceEnabled();
private List<Operation<Object, Object>> changeLog;
private boolean hasClearOperation;
@Override
public DeltaAware merge(DeltaAware d) {
AtomicHashMap<Object, Object> other;
if (d != null && (d instanceof AtomicHashMap))
other = (AtomicHashMap<Object, Object>) d;
else
other = new AtomicHashMap();
if (changeLog != null) {
for (Operation<Object, Object> o : changeLog) o.replay(other.delegate);
}
return other;
}
public void addOperation(Operation<?, ?> o) {
if (changeLog == null) {
// lazy init
changeLog = new LinkedList<Operation<Object, Object>>();
}
if(o instanceof ClearOperation) {
hasClearOperation = true;
}
changeLog.add((Operation<Object, Object>) o);
}
public Collection<Object> getKeys() {
List<Object> keys = new LinkedList<Object>();
if (changeLog != null) {
for (Operation<?, ?> o : changeLog) {
Object key = o.keyAffected();
keys.add(key);
}
}
return keys;
}
public boolean hasClearOperation(){
return hasClearOperation;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder( "AtomicHashMapDelta{changeLog=");
sb.append(changeLog);
sb.append( ",hasClear=");
sb.append(hasClearOperation);
sb.append("}");
return sb.toString();
}
public int getChangeLogSize() {
return changeLog == null ? 0 : changeLog.size();
}
public static class Externalizer extends AbstractExternalizer<AtomicHashMapDelta> {
@Override
public void writeObject(ObjectOutput output, AtomicHashMapDelta delta) throws IOException {
if (trace) log.tracef("Serializing changeLog %s", delta.changeLog);
output.writeObject(delta.changeLog);
}
@Override
public AtomicHashMapDelta readObject(ObjectInput input) throws IOException, ClassNotFoundException {
AtomicHashMapDelta delta = new AtomicHashMapDelta();
delta.changeLog = (List<Operation<Object, Object>>) input.readObject();
if (trace) log.tracef("Deserialized changeLog %s", delta.changeLog);
return delta;
}
@Override
public Integer getId() {
return Ids.ATOMIC_HASH_MAP_DELTA;
}
@Override
public Set<Class<? extends AtomicHashMapDelta>> getTypeClasses() {
return Util.<Class<? extends AtomicHashMapDelta>>asSet(AtomicHashMapDelta.class);
}
}
}