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RemoveCommand.java
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RemoveCommand.java
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package org.infinispan.commands.write;
import static org.infinispan.commons.util.Util.toStr;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Objects;
import org.infinispan.commands.CommandInvocationId;
import org.infinispan.commands.MetadataAwareCommand;
import org.infinispan.commands.Visitor;
import org.infinispan.commons.io.UnsignedNumeric;
import org.infinispan.commons.marshall.MarshallUtil;
import org.infinispan.context.InvocationContext;
import org.infinispan.context.impl.FlagBitSets;
import org.infinispan.metadata.Metadata;
import org.infinispan.metadata.impl.PrivateMetadata;
/**
* @author Mircea.Markus@jboss.com
* @author <a href="mailto:galder.zamarreno@jboss.com">Galder Zamarreno</a>
* @since 4.0
*/
public class RemoveCommand extends AbstractDataWriteCommand implements MetadataAwareCommand {
public static final byte COMMAND_ID = 10;
protected boolean successful = true;
private boolean nonExistent = false;
private boolean returnEntry = false;
protected Metadata metadata;
protected ValueMatcher valueMatcher;
private PrivateMetadata internalMetadata;
/**
* When not null, value indicates that the entry should only be removed if the key is mapped to this value.
* When null, the entry should be removed regardless of what value it is mapped to.
*/
protected Object value;
public RemoveCommand(Object key, Object value, boolean returnEntry, int segment, long flagsBitSet,
CommandInvocationId commandInvocationId) {
super(key, segment, flagsBitSet, commandInvocationId);
this.value = value;
this.valueMatcher = value != null ? ValueMatcher.MATCH_EXPECTED : ValueMatcher.MATCH_ALWAYS;
this.returnEntry = returnEntry;
}
public RemoveCommand() {
}
@Override
public Object acceptVisitor(InvocationContext ctx, Visitor visitor) throws Throwable {
return visitor.visitRemoveCommand(ctx, this);
}
@Override
public boolean shouldReplicate(InvocationContext ctx, boolean requireReplicateIfRemote) {
if (!isSuccessful()) {
return false;
}
// XSITE backup should always replicate remove command
// If skip cache load is set we don't know if the store had a null value for remove so we have to replicate still
// Also if this is a backup write then we can't skip replication to stores
// Also if the caller says we must replicte on remote, make sure we are local
return (!nonExistent || hasAnyFlag(FlagBitSets.SKIP_XSITE_BACKUP |
FlagBitSets.SKIP_CACHE_LOAD) || (requireReplicateIfRemote && (ctx == null || !ctx.isOriginLocal())));
}
@Override
public byte getCommandId() {
return COMMAND_ID;
}
@Override
public void setMetadata(Metadata metadata) {
this.metadata = metadata;
}
@Override
public Metadata getMetadata() {
return metadata;
}
@Override
public boolean equals(Object o) {
if (!super.equals(o)) {
return false;
}
RemoveCommand that = (RemoveCommand) o;
return Objects.equals(value, that.value);
}
@Override
public int hashCode() {
int result = super.hashCode();
result = 31 * result + (value != null ? value.hashCode() : 0);
return result;
}
@Override
public String toString() {
return new StringBuilder()
.append("RemoveCommand{key=")
.append(toStr(key))
.append(", value=").append(toStr(value))
.append(", returnEntry=").append(returnEntry)
.append(", metadata=").append(metadata)
.append(", internalMetadata=").append(internalMetadata)
.append(", flags=").append(printFlags())
.append(", commandInvocationId=").append(CommandInvocationId.show(commandInvocationId))
.append(", valueMatcher=").append(valueMatcher)
.append(", topologyId=").append(getTopologyId())
.append("}")
.toString();
}
@Override
public boolean isSuccessful() {
return successful;
}
@Override
public boolean isConditional() {
return value != null;
}
public void nonExistant() {
nonExistent = true;
}
public boolean isNonExistent() {
return nonExistent;
}
@Override
public void writeTo(ObjectOutput output) throws IOException {
output.writeObject(key);
output.writeObject(value);
output.writeBoolean(returnEntry);
UnsignedNumeric.writeUnsignedInt(output, segment);
output.writeObject(metadata);
output.writeLong(FlagBitSets.copyWithoutRemotableFlags(getFlagsBitSet()));
MarshallUtil.marshallEnum(valueMatcher, output);
CommandInvocationId.writeTo(output, commandInvocationId);
output.writeObject(internalMetadata);
}
@Override
public void readFrom(ObjectInput input) throws IOException, ClassNotFoundException {
key = input.readObject();
value = input.readObject();
returnEntry = input.readBoolean();
segment = UnsignedNumeric.readUnsignedInt(input);
metadata = (Metadata) input.readObject();
setFlagsBitSet(input.readLong());
valueMatcher = MarshallUtil.unmarshallEnum(input, ValueMatcher::valueOf);
commandInvocationId = CommandInvocationId.readFrom(input);
internalMetadata = (PrivateMetadata) input.readObject();
}
@Override
public ValueMatcher getValueMatcher() {
return valueMatcher;
}
@Override
public void setValueMatcher(ValueMatcher valueMatcher) {
this.valueMatcher = valueMatcher;
}
@Override
public void fail() {
successful = false;
}
@Override
public LoadType loadType() {
return isConditional() || !hasAnyFlag(FlagBitSets.IGNORE_RETURN_VALUES) ? LoadType.PRIMARY : LoadType.DONT_LOAD;
}
public Object getValue() {
return value;
}
public void setValue(Object value) {
this.value = value;
}
public boolean isReturnEntryNecessary() {
return returnEntry;
}
@Override
public final boolean isReturnValueExpected() {
// IGNORE_RETURN_VALUES ignored for conditional remove
return isConditional() || super.isReturnValueExpected();
}
public PrivateMetadata getInternalMetadata() {
return internalMetadata;
}
public void setInternalMetadata(PrivateMetadata internalMetadata) {
this.internalMetadata = internalMetadata;
}
}