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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.clustercontroller.core;
import com.yahoo.vdslib.distribution.ConfiguredNode;
import com.yahoo.vdslib.distribution.Distribution;
import com.yahoo.vdslib.state.Node;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
/**
* Detail information about the current state of all the distributor and storage nodes of the cluster.
*
* @author hakonhall
* @author bratseth
*/
public class ClusterInfo {
/** The configured nodes of this cluster, indexed by node index */
private final Map<Integer, ConfiguredNode> nodes = new HashMap<>();
/** Information about the current state of distributors */
private final Map<Integer, DistributorNodeInfo> distributorNodeInfo = new TreeMap<>();
/** Information about the current state of storage nodes */
private final Map<Integer, StorageNodeInfo> storageNodeInfo = new TreeMap<>();
/** Information about the current state of all nodes - always consists of both sets of nodes in the two maps above */
private final Map<Node, NodeInfo> allNodeInfo = new TreeMap<>(); // TODO: Remove
/** Returns non-null iff index is a configured nodes (except perhaps in tests). */
DistributorNodeInfo getDistributorNodeInfo(int index) { return distributorNodeInfo.get(index); }
/** Returns non-null iff index is a configured nodes (except perhaps in tests). */
StorageNodeInfo getStorageNodeInfo(int index) { return storageNodeInfo.get(index); }
/** Returns information about the given node id, or null if this node does not exist */
public NodeInfo getNodeInfo(Node node) { return allNodeInfo.get(node); }
Collection<DistributorNodeInfo> getDistributorNodeInfo() { return Collections.unmodifiableCollection(distributorNodeInfo.values()); }
Collection<StorageNodeInfo> getStorageNodeInfo() { return Collections.unmodifiableCollection(storageNodeInfo.values()); }
Collection<NodeInfo> getAllNodeInfo() { return Collections.unmodifiableCollection(allNodeInfo.values()); }
/** Returns the configured nodes of this as a read-only map indexed on node index (distribution key) */
Map<Integer, ConfiguredNode> getConfiguredNodes() { return Collections.unmodifiableMap(nodes); }
boolean hasConfiguredNode(int index) { return nodes.containsKey(index); }
/** Sets the nodes which belongs to this cluster */
void setNodes(Collection<ConfiguredNode> newNodes, ContentCluster owner, Distribution distribution) {
// Remove info for removed nodes
Set<ConfiguredNode> newNodesSet = new HashSet<>(newNodes);
for (ConfiguredNode existingNode : this.nodes.values()) {
if ( ! newNodesSet.contains(existingNode)) {
Node existingStorageNode = storageNodeInfo.remove(existingNode.index()).getNode();
Node existingDistributorNode = distributorNodeInfo.remove(existingNode.index()).getNode();
allNodeInfo.remove(existingDistributorNode);
allNodeInfo.remove(existingStorageNode);
}
}
// Add and update new nodes info
for (ConfiguredNode node : newNodes) {
if ( ! nodes.containsKey(node.index())) { // add new node info
addNodeInfo(new DistributorNodeInfo(owner, node.index(), null, distribution));
addNodeInfo(new StorageNodeInfo(owner, node.index(), node.retired(), null, distribution));
}
else {
getStorageNodeInfo(node.index()).setConfiguredRetired(node.retired());
}
}
// Update node set
nodes.clear();
for (ConfiguredNode node : newNodes) {
this.nodes.put(node.index(), node);
}
}
private void addNodeInfo(NodeInfo nodeInfo) {
if (nodeInfo instanceof DistributorNodeInfo) {
distributorNodeInfo.put(nodeInfo.getNodeIndex(), (DistributorNodeInfo) nodeInfo);
} else {
storageNodeInfo.put(nodeInfo.getNodeIndex(), (StorageNodeInfo) nodeInfo);
}
allNodeInfo.put(nodeInfo.getNode(), nodeInfo);
nodeInfo.setReportedState(nodeInfo.getReportedState().setDescription("Node not seen in slobrok."), 0);
}
/** Returns true if no nodes are down or unknown */
boolean allStatesReported() {
if (nodes.isEmpty()) return false;
for (ConfiguredNode node : nodes.values()) {
if (getDistributorNodeInfo(node.index()).getReportedState().getState().oneOf("d-")) return false;
if (getStorageNodeInfo(node.index()).getReportedState().getState().oneOf("d-")) return false;
}
return true;
}
/**
* Sets the rpc address of a node. If the node does not exist this does nothing.
*
* @return the info to which an rpc address is set, or null if none
*/
public NodeInfo setRpcAddress(Node node, String rpcAddress) {
NodeInfo nodeInfo = getInfo(node);
if (nodeInfo != null) {
nodeInfo.setRpcAddress(rpcAddress);
}
return nodeInfo;
}
// TODO: Do all mutation of node info through setters in this
/** Returns the node info object for a given node identifier */
private NodeInfo getInfo(Node node) {
switch (node.getType()) {
case DISTRIBUTOR : return getDistributorNodeInfo(node.getIndex());
case STORAGE : return getStorageNodeInfo(node.getIndex());
default : throw new IllegalArgumentException("No node type " + node.getType().toString());
}
}
}
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