package org.infinispan.commands.read;
import static org.infinispan.commons.util.Util.toStr;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import org.infinispan.commands.Visitor;
import org.infinispan.container.InternalEntryFactory;
import org.infinispan.container.entries.CacheEntry;
import org.infinispan.context.InvocationContext;
import org.infinispan.context.impl.FlagBitSets;
/**
* Used to fetch a full CacheEntry rather than just the value.
* This functionality was originally incorporated into GetKeyValueCommand.
*
* @author Sanne Grinovero <sanne@hibernate.org> (C) 2014 Red Hat Inc.
* @since 7.1
*/
public final class GetCacheEntryCommand extends AbstractDataCommand {
public static final byte COMMAND_ID = 45;
private InternalEntryFactory entryFactory;
public GetCacheEntryCommand(Object key, long flagsBitSet, InternalEntryFactory entryFactory) {
super(key, flagsBitSet);
this.entryFactory = entryFactory;
}
public GetCacheEntryCommand() {
}
@Override
public Object acceptVisitor(InvocationContext ctx, Visitor visitor) throws Throwable {
return visitor.visitGetCacheEntryCommand(ctx, this);
}
@Override
public LoadType loadType() {
return LoadType.OWNER;
}
@Override
public Object perform(InvocationContext ctx) throws Throwable {
CacheEntry entry = ctx.lookupEntry(key);
if (entry.isNull() || entry.isRemoved()) {
return null;
}
return entryFactory.copy(entry);
}
@Override
public byte getCommandId() {
return COMMAND_ID;
}
@Override
public void writeTo(ObjectOutput output) throws IOException {
output.writeObject(key);
output.writeLong(FlagBitSets.copyWithoutRemotableFlags(getFlagsBitSet()));
}
@Override
public void readFrom(ObjectInput input) throws IOException, ClassNotFoundException {
key = input.readObject();
setFlagsBitSet(input.readLong());
}
public String toString() {
return new StringBuilder()
.append("GetCacheEntryCommand {key=")
.append(toStr(key))
.append(", flags=").append(printFlags())
.append("}")
.toString();
}
}