private static Runnable getListener(SolrCore core, ZkSolrResourceLoader zkSolrResourceLoader) {
final String coreName = core.getName();
final CoreContainer cc = core.getCoreDescriptor().getCoreContainer();
final String overlayPath =
zkSolrResourceLoader.getConfigSetZkPath() + "/" + ConfigOverlay.RESOURCE_NAME;
final String solrConfigPath =
zkSolrResourceLoader.getConfigSetZkPath() + "/" + core.getSolrConfig().getName();
String schemaRes = null;
if (core.getLatestSchema().isMutable()
&& core.getLatestSchema() instanceof ManagedIndexSchema) {
ManagedIndexSchema mis = (ManagedIndexSchema) core.getLatestSchema();
schemaRes = mis.getResourceName();
}
final String managedSchmaResourcePath =
schemaRes == null ? null : zkSolrResourceLoader.getConfigSetZkPath() + "/" + schemaRes;
return new Runnable() {
@Override
public void run() {
log.info("config update listener called for core {}", coreName);
SolrZkClient zkClient = cc.getZkController().getZkClient();
int solrConfigversion, overlayVersion, managedSchemaVersion = 0;
SolrConfig cfg = null;
try (SolrCore core = cc.getCore(coreName)) {
if (core.isClosed()) return;
cfg = core.getSolrConfig();
solrConfigversion = core.getSolrConfig().getOverlay().getZnodeVersion();
overlayVersion = core.getSolrConfig().getZnodeVersion();
if (managedSchmaResourcePath != null) {
managedSchemaVersion =
((ManagedIndexSchema) core.getLatestSchema()).getSchemaZkVersion();
}
}
if (cfg != null) {
cfg.refreshRequestParams();
}
if (checkStale(zkClient, overlayPath, solrConfigversion)
|| checkStale(zkClient, solrConfigPath, overlayVersion)
|| checkStale(zkClient, managedSchmaResourcePath, managedSchemaVersion)) {
log.info("core reload {}", coreName);
cc.reload(coreName);
}
}
};
}
@Override
public void inform(final SolrCore core) {
if (!(core.getResourceLoader() instanceof ZkSolrResourceLoader)) return;
final ZkSolrResourceLoader zkSolrResourceLoader =
(ZkSolrResourceLoader) core.getResourceLoader();
if (zkSolrResourceLoader != null)
zkSolrResourceLoader
.getZkController()
.registerConfListenerForCore(
zkSolrResourceLoader.getConfigSetZkPath(),
core,
getListener(core, zkSolrResourceLoader));
}