/*
* 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.context.InvocationContext;
import org.infinispan.lifecycle.ComponentStatus;
import org.infinispan.notifications.cachelistener.CacheNotifier;
import org.infinispan.util.Util;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
import java.util.Arrays;
import java.util.Collection;
/**
* Removes an entry from memory.
*
* @author Mircea.Markus@jboss.com
* @since 4.0
*/
public class InvalidateCommand extends RemoveCommand {
public static final int COMMAND_ID = 6;
private static final Log log = LogFactory.getLog(InvalidateCommand.class);
private static final boolean trace = log.isTraceEnabled();
protected Object[] keys;
public InvalidateCommand() {
}
public InvalidateCommand(CacheNotifier notifier, Object... keys) {
this.keys = keys;
this.notifier = notifier;
}
public InvalidateCommand(CacheNotifier notifier, Collection<Object> keys) {
if (keys == null || keys.isEmpty())
this.keys = Util.EMPTY_OBJECT_ARRAY;
else
this.keys = keys.toArray(new Object[keys.size()]);
this.notifier = notifier;
}
/**
* Performs an invalidation on a specified entry
*
* @param ctx invocation context
* @return null
*/
@Override
public Object perform(InvocationContext ctx) throws Throwable {
if (trace) {
log.tracef("Invalidating keys %s", Arrays.toString(keys));
}
for (Object k : keys) {
invalidate(ctx, k);
}
return null;
}
protected void invalidate(InvocationContext ctx, Object keyToInvalidate) throws Throwable {
key = keyToInvalidate; // so that the superclass can see it
super.perform(ctx);
}
@Override
protected void notify(InvocationContext ctx, Object value, boolean isPre) {
notifier.notifyCacheEntryInvalidated(key, value, isPre, ctx);
}
@Override
public byte getCommandId() {
return COMMAND_ID;
}
@Override
public String toString() {
return "InvalidateCommand{keys=" +
Arrays.toString(keys) +
'}';
}
@Override
public Object[] getParameters() {
if (keys == null || keys.length == 0) {
return new Object[]{0};
} else if (keys.length == 1) {
return new Object[]{1, keys[0]};
} else {
Object[] retval = new Object[keys.length + 1];
retval[0] = keys.length;
System.arraycopy(keys, 0, retval, 1, keys.length);
return retval;
}
}
@Override
public void setParameters(int commandId, Object[] args) {
if (commandId != COMMAND_ID) throw new IllegalStateException("Invalid method id");
int size = (Integer) args[0];
keys = new Object[size];
if (size == 1) {
keys[0] = args[1];
} else if (size > 0) {
System.arraycopy(args, 1, keys, 0, size);
}
}
@Override
public Object acceptVisitor(InvocationContext ctx, Visitor visitor) throws Throwable {
return visitor.visitInvalidateCommand(ctx, this);
}
@Override
public Object getKey() {
throw new UnsupportedOperationException("Not supported. Use getKeys() instead.");
}
public Object[] getKeys() {
return keys;
}
@Override
public boolean ignoreCommandOnStatus(ComponentStatus status) {
switch (status) {
case FAILED:
case STOPPING:
case TERMINATED:
return true;
default:
return false;
}
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof InvalidateCommand)) {
return false;
}
if (!super.equals(o)) {
return false;
}
InvalidateCommand that = (InvalidateCommand) o;
if (!Arrays.equals(keys, that.keys)) {
return false;
}
return true;
}
@Override
public int hashCode() {
int result = super.hashCode();
result = 31 * result + (keys != null ? Arrays.hashCode(keys) : 0);
return result;
}
}