/**
* Refresh the includes/excludes information.
*
* @throws IOException
*/
public synchronized void refreshNodes() throws IOException {
hostsReader.refresh();
LOG.info(
"After refresh Included hosts: "
+ hostsReader.getHostNames().size()
+ " Excluded hosts: "
+ hostsReader.getExcludedHosts().size());
Set<String> newHosts = hostsReader.getHostNames();
Set<String> newExcludes = hostsReader.getExcludedHosts();
Set<ClusterNode> hostsToExclude = new HashSet<ClusterNode>();
for (ClusterNode tmpNode : nameToNode.values()) {
String host = tmpNode.getHost();
// Check if not included or explicitly excluded.
if (!newHosts.contains(host) || newExcludes.contains(host)) {
hostsToExclude.add(tmpNode);
}
}
for (ClusterNode node : hostsToExclude) {
synchronized (node) {
for (Map.Entry<ResourceType, RunnableIndices> entry : typeToIndices.entrySet()) {
ResourceType type = entry.getKey();
RunnableIndices r = entry.getValue();
if (r.hasRunnable(node)) {
LOG.info(
"Node "
+ node.getName()
+ " is no longer "
+ type
+ " runnable because it is excluded");
r.deleteRunnable(node);
}
}
}
}
}
/**
* NodeManager constructor given a cluster manager and a {@link HostsFileReader} for
* includes/excludes lists
*
* @param clusterManager the cluster manager
* @param hostsReader the host reader for includes/excludes
*/
public NodeManager(ClusterManager clusterManager, HostsFileReader hostsReader) {
this.hostsReader = hostsReader;
LOG.info(
"Included hosts: "
+ hostsReader.getHostNames().size()
+ " Excluded hosts: "
+ hostsReader.getExcludedHosts().size());
this.clusterManager = clusterManager;
this.expireNodesThread = new Thread(this.expireNodes, "expireNodes");
this.expireNodesThread.setDaemon(true);
this.expireNodesThread.start();
this.faultManager = new FaultManager(this);
}
/** Update metrics for alive/dead nodes. */
private void setAliveDeadMetrics() {
clusterManager.getMetrics().setAliveNodes(nameToNode.size());
int totalHosts = hostsReader.getHosts().size();
if (totalHosts > 0) {
clusterManager.getMetrics().setDeadNodes(totalHosts - nameToNode.size());
}
}
/**
* Checks if a host is allowed to communicate with the cluster manager.
*
* @param host The host
* @return a boolean indicating if the host is allowed.
*/
private boolean canAllowNode(String host) {
return hostsReader.isAllowedHost(host);
}
/** @return The excluded hosts. */
public Set<String> getExcludedNodes() {
return hostsReader.getExcludedHosts();
}
/** @return The number of excluded hosts. */
public int getExcludedNodeCount() {
return hostsReader.getExcludedHosts().size();
}
/** @return All the configured hosts. */
public Set<String> getAllNodes() {
return hostsReader.getHostNames();
}
/** @return The total number of configured hosts. */
public int getTotalNodeCount() {
return hostsReader.getHosts().size();
}