com.datastax.oss.driver.internal.core.metadata.FullNodeListRefresh Maven / Gradle / Ivy
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* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
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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 nodeInfos;
FullNodeListRefresh(Iterable nodeInfos) {
this.nodeInfos = nodeInfos;
}
@Override
public Result compute(
DefaultMetadata oldMetadata, boolean tokenMapEnabled, InternalDriverContext context) {
String logPrefix = context.getSessionName();
TokenFactoryRegistry tokenFactoryRegistry = context.getTokenFactoryRegistry();
Map oldNodes = oldMetadata.getNodes();
Map added = new HashMap<>();
Set 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 removed = Sets.difference(oldNodes.keySet(), seen);
if (added.isEmpty() && removed.isEmpty()) { // The list didn't change
if (!oldMetadata.getTokenMap().isPresent() && tokenFactory != null) {
// First time we found out what the partitioner is => set the token factory and trigger a
// token map rebuild:
return new Result(
oldMetadata.withNodes(
oldMetadata.getNodes(), tokenMapEnabled, true, tokenFactory, context));
} else {
// No need to create a new metadata instance
return new Result(oldMetadata);
}
} else {
ImmutableMap.Builder newNodesBuilder = ImmutableMap.builder();
ImmutableList.Builder