/*
* JBoss, Home of Professional Open Source
* 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.commands.write;
import org.infinispan.commands.Visitor;
import org.infinispan.container.entries.MVCCEntry;
import org.infinispan.context.Flag;
import org.infinispan.context.InvocationContext;
import org.infinispan.notifications.cachelistener.CacheNotifier;
import java.util.Set;
/**
* @author Mircea.Markus@jboss.com
* @author Galder Zamarreño
* @since 4.0
*/
public class ReplaceCommand extends AbstractDataWriteCommand {
public static final byte COMMAND_ID = 11;
Object oldValue;
Object newValue;
long lifespanMillis = -1;
long maxIdleTimeMillis = -1;
CacheNotifier notifier;
boolean successful = true;
public ReplaceCommand() {
}
public ReplaceCommand(Object key, Object oldValue, Object newValue, CacheNotifier notifier, long lifespanMillis, long maxIdleTimeMillis, Set<Flag> flags) {
super(key, flags);
this.oldValue = oldValue;
this.newValue = newValue;
this.notifier = notifier;
this.lifespanMillis = lifespanMillis;
this.maxIdleTimeMillis = maxIdleTimeMillis;
}
public void init(CacheNotifier notifier) {
this.notifier = notifier;
}
@Override
public Object acceptVisitor(InvocationContext ctx, Visitor visitor) throws Throwable {
return visitor.visitReplaceCommand(ctx, this);
}
@Override
public Object perform(InvocationContext ctx) throws Throwable {
MVCCEntry e = (MVCCEntry) ctx.lookupEntry(key);
if (e != null) {
if (ctx.isOriginLocal()) {
//ISPN-514
if (e.isNull() || e.getValue() == null) return returnValue(null, false, ctx);
}
if (oldValue == null || oldValue.equals(e.getValue())) {
Object old = e.setValue(newValue);
e.setLifespan(lifespanMillis);
e.setMaxIdle(maxIdleTimeMillis);
return returnValue(old, true, ctx);
}
return returnValue(null, false, ctx);
}
return returnValue(null, false, ctx);
}
private Object returnValue(Object beingReplaced, boolean successful,
InvocationContext ctx) {
this.successful = successful;
Object previousValue = oldValue == null ? beingReplaced : oldValue;
if (successful) {
this.notifier.notifyCacheEntryModified(key, previousValue, true, ctx);
this.notifier.notifyCacheEntryModified(key, this.newValue, false, ctx);
}
if (oldValue == null) {
return beingReplaced;
} else {
return successful;
}
}
@Override
public byte getCommandId() {
return COMMAND_ID;
}
@Override
public Object[] getParameters() {
return new Object[]{key, oldValue, newValue, lifespanMillis, maxIdleTimeMillis,
Flag.copyWithoutRemotableFlags(flags)};
}
@Override
@SuppressWarnings("unchecked")
public void setParameters(int commandId, Object[] parameters) {
if (commandId != COMMAND_ID) throw new IllegalArgumentException("Invalid method name");
key = parameters[0];
oldValue = parameters[1];
newValue = parameters[2];
lifespanMillis = (Long) parameters[3];
maxIdleTimeMillis = (Long) parameters[4];
flags = (Set<Flag>) parameters[5];
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
if (!super.equals(o)) return false;
ReplaceCommand that = (ReplaceCommand) o;
if (lifespanMillis != that.lifespanMillis) return false;
if (maxIdleTimeMillis != that.maxIdleTimeMillis) return false;
if (newValue != null ? !newValue.equals(that.newValue) : that.newValue != null) return false;
if (oldValue != null ? !oldValue.equals(that.oldValue) : that.oldValue != null) return false;
return true;
}
@Override
public int hashCode() {
int result = super.hashCode();
result = 31 * result + (oldValue != null ? oldValue.hashCode() : 0);
result = 31 * result + (newValue != null ? newValue.hashCode() : 0);
result = 31 * result + (int) (lifespanMillis ^ (lifespanMillis >>> 32));
result = 31 * result + (int) (maxIdleTimeMillis ^ (maxIdleTimeMillis >>> 32));
return result;
}
@Override
public boolean isSuccessful() {
return successful;
}
@Override
public boolean isConditional() {
return true;
}
public long getLifespanMillis() {
return lifespanMillis;
}
public long getMaxIdleTimeMillis() {
return maxIdleTimeMillis;
}
public Object getOldValue() {
return oldValue;
}
public void setOldValue(Object oldValue) {
this.oldValue = oldValue;
}
public Object getNewValue() {
return newValue;
}
public void setNewValue(Object newValue) {
this.newValue = newValue;
}
@Override
public String toString() {
return "ReplaceCommand{" +
"key=" + key +
", oldValue=" + oldValue +
", newValue=" + newValue +
", flags=" + flags +
", successful=" + successful +
'}';
}
}