/*
* Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.controller.cluster.access.commands;
import akka.actor.ActorRef;
import com.google.common.annotations.Beta;
import com.google.common.base.Preconditions;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.concurrent.NotThreadSafe;
import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
import org.opendaylight.yangtools.concepts.Builder;
import org.opendaylight.yangtools.concepts.Identifiable;
/**
* A reusable {@link Builder} for creating {@link ModifyTransactionRequest} message instances. Its internal state is
* reset when {@link #build()} is invoked, hence it can be used to create a sequence of messages.
*
* @author Robert Varga
*/
@Beta
@NotThreadSafe
public final class ModifyTransactionRequestBuilder implements Builder<ModifyTransactionRequest>,
Identifiable<TransactionIdentifier> {
private final List<TransactionModification> modifications = new ArrayList<>(1);
private final TransactionIdentifier identifier;
private final ActorRef replyTo;
private PersistenceProtocol protocol;
private boolean haveSequence;
private long sequence;
public ModifyTransactionRequestBuilder(final TransactionIdentifier identifier, final ActorRef replyTo) {
this.identifier = Preconditions.checkNotNull(identifier);
this.replyTo = Preconditions.checkNotNull(replyTo);
}
@Override
public TransactionIdentifier getIdentifier() {
return identifier;
}
private void checkNotFinished() {
Preconditions.checkState(protocol == null, "Batch has already been finished");
}
public void addModification(final TransactionModification modification) {
checkNotFinished();
modifications.add(Preconditions.checkNotNull(modification));
}
public void setSequence(final long sequence) {
Preconditions.checkState(!haveSequence, "Sequence has already been set");
this.sequence = sequence;
haveSequence = true;
}
public void setAbort() {
checkNotFinished();
// Transaction is being aborted, no need to transmit operations
modifications.clear();
protocol = PersistenceProtocol.ABORT;
}
public void setCommit(final boolean coordinated) {
checkNotFinished();
protocol = coordinated ? PersistenceProtocol.THREE_PHASE : PersistenceProtocol.SIMPLE;
}
public void setReady() {
checkNotFinished();
protocol = PersistenceProtocol.READY;
}
public int size() {
return modifications.size();
}
@Override
public ModifyTransactionRequest build() {
Preconditions.checkState(haveSequence, "Request sequence has not been set");
final ModifyTransactionRequest ret = new ModifyTransactionRequest(identifier, sequence, replyTo, modifications,
protocol);
modifications.clear();
protocol = null;
haveSequence = false;
return ret;
}
}