package com.datastax.oss.driver.internal.core.metadata;
import com.datastax.oss.driver.api.core.metadata.Node;
import com.datastax.oss.driver.internal.core.context.InternalDriverContext;
import com.datastax.oss.driver.internal.core.metadata.token.DefaultTokenMap;
import com.datastax.oss.driver.internal.core.metadata.token.TokenFactory;
import com.datastax.oss.driver.internal.core.metadata.token.TokenFactoryRegistry;
import com.datastax.oss.driver.shaded.guava.common.annotations.VisibleForTesting;
import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableList;
import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableMap;
import com.datastax.oss.driver.shaded.guava.common.collect.Sets;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import net.jcip.annotations.ThreadSafe;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@ThreadSafe
class FullNodeListRefresh extends NodesRefresh {
private static final Logger LOG = LoggerFactory.getLogger(FullNodeListRefresh.class);
@VisibleForTesting final Iterable<NodeInfo> nodeInfos;
FullNodeListRefresh(Iterable<NodeInfo> nodeInfos) {
this.nodeInfos = nodeInfos;
}
@Override
public Result compute(
DefaultMetadata oldMetadata, boolean tokenMapEnabled, InternalDriverContext context) {
String logPrefix = context.getSessionName();
TokenFactoryRegistry tokenFactoryRegistry = context.getTokenFactoryRegistry();
Map<UUID, Node> oldNodes = oldMetadata.getNodes();
Map<UUID, Node> added = new HashMap<>();
Set<UUID> seen = new HashSet<>();
TokenFactory tokenFactory =
oldMetadata.getTokenMap().map(m -> ((DefaultTokenMap) m).getTokenFactory()).orElse(null);
boolean tokensChanged = false;
for (NodeInfo nodeInfo : nodeInfos) {
UUID id = nodeInfo.getHostId();
if (seen.contains(id)) {
LOG.warn(
"[{}] Found duplicate entries with host_id {} in system.peers, "
+ "keeping only the first one",
logPrefix,
id);
} else {
seen.add(id);
DefaultNode node = (DefaultNode) oldNodes.get(id);
if (node == null) {
node = new DefaultNode(nodeInfo.getEndPoint(), context);
LOG.debug("[{}] Adding new node {}", logPrefix, node);
added.put(id, node);
}
if (tokenFactory == null && nodeInfo.getPartitioner() != null) {
tokenFactory = tokenFactoryRegistry.tokenFactoryFor(nodeInfo.getPartitioner());
}
tokensChanged |= copyInfos(nodeInfo, node, context);
}
}
Set<UUID> removed = Sets.difference(oldNodes.keySet(), seen);
if (added.isEmpty() && removed.isEmpty()) {
if (!oldMetadata.getTokenMap().isPresent() && tokenFactory != null) {
return new Result(
oldMetadata.withNodes(
oldMetadata.getNodes(), tokenMapEnabled, true, tokenFactory, context));
} else {
return new Result(oldMetadata);
}
} else {
ImmutableMap.Builder<UUID, Node> newNodesBuilder = ImmutableMap.builder();
ImmutableList.Builder<Object> eventsBuilder = ImmutableList.builder();
newNodesBuilder.putAll(added);
for (Map.Entry<UUID, Node> entry : oldNodes.entrySet()) {
if (!removed.contains(entry.getKey())) {
newNodesBuilder.put(entry.getKey(), entry.getValue());
}
}
for (Node node : added.values()) {
eventsBuilder.add(NodeStateEvent.added((DefaultNode) node));
}
for (UUID id : removed) {
Node node = oldNodes.get(id);
eventsBuilder.add(NodeStateEvent.removed((DefaultNode) node));
}
return new Result(
oldMetadata.withNodes(
newNodesBuilder.build(), tokenMapEnabled, tokensChanged, tokenFactory, context),
eventsBuilder.build());
}
}
}