2 * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.controller.cluster.databroker.actors.dds;
10 import com.google.common.annotations.Beta;
11 import com.google.common.base.Preconditions;
12 import com.google.common.base.Verify;
13 import java.util.Optional;
14 import org.opendaylight.controller.cluster.access.concepts.LocalHistoryIdentifier;
15 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
18 * Client-side view of a local history. This class tracks all state related to a particular history and routes
19 * frontend requests towards the backend.
22 * This interface is used by the world outside of the actor system and in the actor system it is manifested via
23 * its client actor. That requires some state transfer with {@link DistributedDataStoreClientBehavior}. In order to
24 * reduce request latency, all messages are carbon-copied (and enqueued first) to the client actor.
26 * @author Robert Varga
29 public final class ClientLocalHistory extends AbstractClientHistory implements AutoCloseable {
30 ClientLocalHistory(final DistributedDataStoreClientBehavior client, final LocalHistoryIdentifier historyId) {
31 super(client, historyId);
36 final State local = state();
37 if (local != State.CLOSED) {
38 Preconditions.checkState(local == State.IDLE, "Local history %s has an open transaction", this);
39 updateState(local, State.CLOSED);
44 ClientTransaction doCreateTransaction() {
45 final State local = state();
46 Preconditions.checkState(local == State.IDLE, "Local history %s state is %s", this, local);
47 updateState(local, State.TX_OPEN);
49 return new ClientTransaction(this, new TransactionIdentifier(getIdentifier(), nextTx()));
53 AbstractTransactionCommitCohort onTransactionReady(final TransactionIdentifier txId,
54 final AbstractTransactionCommitCohort cohort) {
55 // FIXME: deal with CLOSED here
56 final State local = state();
57 Verify.verify(local == State.TX_OPEN, "Local history %s is in unexpected state %s", this, local);
58 updateState(local, State.IDLE);
60 return super.onTransactionReady(txId, cohort);
64 AbstractProxyHistory createHistoryProxy(final LocalHistoryIdentifier historyId,
65 final Optional<ShardBackendInfo> backendInfo) {
66 return AbstractProxyHistory.createClient(getClient(), backendInfo, historyId);