/*
* 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.AbstractFlagAffectedCommand;
import org.infinispan.commands.Visitor;
import org.infinispan.container.entries.CacheEntry;
import org.infinispan.container.entries.MVCCEntry;
import org.infinispan.context.Flag;
import org.infinispan.context.InvocationContext;
import org.infinispan.lifecycle.ComponentStatus;
import org.infinispan.notifications.cachelistener.CacheNotifier;
import org.infinispan.util.InfinispanCollections;
import java.util.Set;
/**
* @author Mircea.Markus@jboss.com
* @since 4.0
*/
public class ClearCommand extends AbstractFlagAffectedCommand implements WriteCommand {
public static final byte COMMAND_ID = 5;
CacheNotifier notifier;
public ClearCommand() {
}
public ClearCommand(CacheNotifier notifier, Set<Flag> flags) {
this.notifier = notifier;
this.flags = flags;
}
public void init(CacheNotifier notifier) {
this.notifier = notifier;
}
@Override
public Object acceptVisitor(InvocationContext ctx, Visitor visitor) throws Throwable {
return visitor.visitClearCommand(ctx, this);
}
@Override
public Object perform(InvocationContext ctx) throws Throwable {
for (CacheEntry e : ctx.getLookedUpEntries().values()) {
if (e instanceof MVCCEntry) {
MVCCEntry me = (MVCCEntry) e;
Object k = me.getKey(), v = me.getValue();
notifier.notifyCacheEntryRemoved(k, v, true, ctx);
me.setRemoved(true);
me.setValid(false);
}
}
return null;
}
@Override
public Object[] getParameters() {
return new Object[]{Flag.copyWithoutRemotableFlags(flags)};
}
@Override
public byte getCommandId() {
return COMMAND_ID;
}
@Override
public void setParameters(int commandId, Object[] parameters) {
if (commandId != COMMAND_ID) throw new IllegalStateException("Invalid command id");
if (parameters.length > 0) {
this.flags = (Set<Flag>) parameters[0];
}
}
@Override
public boolean shouldInvoke(InvocationContext ctx) {
return true;
}
@Override
public String toString() {
return new StringBuilder()
.append("ClearCommand{flags=")
.append(flags)
.append("}")
.toString();
}
@Override
public boolean isSuccessful() {
return true;
}
@Override
public boolean isConditional() {
return false;
}
@Override
public Set<Object> getAffectedKeys() {
return InfinispanCollections.emptySet();
}
@Override
public boolean isReturnValueExpected() {
return false;
}
@Override
public boolean ignoreCommandOnStatus(ComponentStatus status) {
return false;
}
}