Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* 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.datastore;
import static com.google.common.base.Verify.verify;
import static java.util.Objects.requireNonNull;
import com.google.common.collect.Collections2;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Maps;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.jdt.annotation.NonNull;
import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
import org.opendaylight.controller.cluster.access.concepts.FrontendIdentifier;
import org.opendaylight.controller.cluster.access.concepts.LocalHistoryIdentifier;
import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
import org.opendaylight.controller.cluster.datastore.persisted.FrontendClientMetadata;
import org.opendaylight.controller.cluster.datastore.persisted.FrontendShardDataTreeSnapshotMetadata;
import org.opendaylight.controller.cluster.datastore.utils.ImmutableUnsignedLongSet;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Frontend state as observed by a shard follower. This class is responsible for maintaining metadata state
* so that this can be used to seed {@link LeaderFrontendState} with proper state so that the frontend/backend
* conversation can continue where it left off. This class is NOT thread-safe.
*
* @author Robert Varga
*/
final class FrontendMetadata extends ShardDataTreeMetadata {
private static final Logger LOG = LoggerFactory.getLogger(FrontendMetadata.class);
private final Map clients = new HashMap<>();
private final String shardName;
FrontendMetadata(final String shardName) {
this.shardName = requireNonNull(shardName);
}
@Override
Class getSupportedType() {
return FrontendShardDataTreeSnapshotMetadata.class;
}
@Override
void reset() {
LOG.debug("{}: clearing clients {}", shardName, clients);
clients.clear();
}
@Override
void doApplySnapshot(final FrontendShardDataTreeSnapshotMetadata snapshot) {
LOG.debug("{}: applying snapshot {} over clients {}", shardName, snapshot, clients);
clients.clear();
for (FrontendClientMetadata m : snapshot.getClients()) {
LOG.debug("{}: applying metadata {}", shardName, m);
final FrontendClientMetadataBuilder b = FrontendClientMetadataBuilder.of(shardName, m);
final FrontendIdentifier client = m.getIdentifier().getFrontendId();
LOG.debug("{}: client {} updated to {}", shardName, client, b);
clients.put(client, b);
}
}
@Override
FrontendShardDataTreeSnapshotMetadata toSnapshot() {
return new FrontendShardDataTreeSnapshotMetadata(Collections2.transform(clients.values(),
FrontendClientMetadataBuilder::build));
}
private FrontendClientMetadataBuilder ensureClient(final ClientIdentifier id) {
final FrontendClientMetadataBuilder existing = clients.get(id.getFrontendId());
if (existing != null && id.equals(existing.getIdentifier())) {
return existing;
}
final FrontendClientMetadataBuilder client = new FrontendClientMetadataBuilder.Enabled(shardName, id);
final FrontendClientMetadataBuilder previous = clients.put(id.getFrontendId(), client);
if (previous != null) {
LOG.debug("{}: Replaced client {} with {}", shardName, previous, client);
} else {
LOG.debug("{}: Added client {}", shardName, client);
}
return client;
}
@Override
void onHistoryCreated(final LocalHistoryIdentifier historyId) {
ensureClient(historyId.getClientId()).onHistoryCreated(historyId);
}
@Override
void onHistoryClosed(final LocalHistoryIdentifier historyId) {
ensureClient(historyId.getClientId()).onHistoryClosed(historyId);
}
@Override
void onHistoryPurged(final LocalHistoryIdentifier historyId) {
ensureClient(historyId.getClientId()).onHistoryPurged(historyId);
}
@Override
void onTransactionAborted(final TransactionIdentifier txId) {
ensureClient(txId.getHistoryId().getClientId()).onTransactionAborted(txId);
}
@Override
void onTransactionCommitted(final TransactionIdentifier txId) {
ensureClient(txId.getHistoryId().getClientId()).onTransactionCommitted(txId);
}
@Override
void onTransactionPurged(final TransactionIdentifier txId) {
ensureClient(txId.getHistoryId().getClientId()).onTransactionPurged(txId);
}
@Override
void onTransactionsSkipped(final LocalHistoryIdentifier historyId, final ImmutableUnsignedLongSet txIds) {
ensureClient(historyId.getClientId()).onTransactionsSkipped(historyId, txIds);
}
/**
* Transform frontend metadata into an active leader state map.
*
* @return Leader frontend state
*/
@NonNull Map toLeaderState(final @NonNull Shard shard) {
return new HashMap<>(Maps.transformValues(clients, meta -> meta.toLeaderState(shard)));
}
void disableTracking(final ClientIdentifier clientId) {
final FrontendIdentifier frontendId = clientId.getFrontendId();
final FrontendClientMetadataBuilder client = clients.get(frontendId);
if (client == null) {
// When we have not seen the client before, we still need to disable tracking for him since this only gets
// triggered once.
LOG.debug("{}: disableTracking {} does not match any client, pre-disabling client.", shardName, clientId);
clients.put(frontendId, new FrontendClientMetadataBuilder.Disabled(shardName, clientId));
return;
}
if (!clientId.equals(client.getIdentifier())) {
LOG.debug("{}: disableTracking {} does not match client {}, ignoring", shardName, clientId, client);
return;
}
if (client instanceof FrontendClientMetadataBuilder.Disabled) {
LOG.debug("{}: client {} is has already disabled tracking", shardName, client);
return;
}
verify(clients.replace(frontendId, client, new FrontendClientMetadataBuilder.Disabled(shardName, clientId)));
}
ImmutableSet getClients() {
return clients.values().stream()
.map(FrontendClientMetadataBuilder::getIdentifier)
.collect(ImmutableSet.toImmutableSet());
}
}
