private void init() throws Exception {
// The states of client that is invalid in this request
Aliases aliases = null;
String corename = "";
String origCorename = null;
// set a request timer which can be reused by requests if needed
req.setAttribute(SolrRequestParsers.REQUEST_TIMER_SERVLET_ATTRIBUTE, new RTimerTree());
// put the core container in request attribute
req.setAttribute("org.apache.solr.CoreContainer", cores);
path = req.getServletPath();
if (req.getPathInfo() != null) {
// this lets you handle /update/commit when /update is a servlet
path += req.getPathInfo();
}
// check for management path
String alternate = cores.getManagementPath();
if (alternate != null && path.startsWith(alternate)) {
path = path.substring(0, alternate.length());
}
// unused feature ?
int idx = path.indexOf(':');
if (idx > 0) {
// save the portion after the ':' for a 'handler' path parameter
path = path.substring(0, idx);
}
boolean usingAliases = false;
// Check for container handlers
handler = cores.getRequestHandler(path);
if (handler != null) {
solrReq = SolrRequestParsers.DEFAULT.parse(null, path, req);
solrReq.getContext().put(CoreContainer.class.getName(), cores);
requestType = RequestType.ADMIN;
action = ADMIN;
return;
} else {
// otherwise, we should find a core from the path
idx = path.indexOf("/", 1);
if (idx > 1) {
// try to get the corename as a request parameter first
corename = path.substring(1, idx);
// look at aliases
if (cores.isZooKeeperAware()) {
origCorename = corename;
ZkStateReader reader = cores.getZkController().getZkStateReader();
aliases = reader.getAliases();
if (aliases != null && aliases.collectionAliasSize() > 0) {
usingAliases = true;
String alias = aliases.getCollectionAlias(corename);
if (alias != null) {
collectionsList = StrUtils.splitSmart(alias, ",", true);
corename = collectionsList.get(0);
}
}
}
core = cores.getCore(corename);
if (core != null) {
path = path.substring(idx);
} else if (cores.isCoreLoading(
corename)) { // extra mem barriers, so don't look at this before trying to get core
throw new SolrException(ErrorCode.SERVICE_UNAVAILABLE, "SolrCore is loading");
} else {
// the core may have just finished loading
core = cores.getCore(corename);
if (core != null) {
path = path.substring(idx);
}
}
}
if (core == null) {
if (!cores.isZooKeeperAware()) {
core = cores.getCore("");
}
}
}
if (core == null && cores.isZooKeeperAware()) {
// we couldn't find the core - lets make sure a collection was not specified instead
core = getCoreByCollection(corename);
if (core != null) {
// we found a core, update the path
path = path.substring(idx);
if (collectionsList == null) collectionsList = new ArrayList<>();
collectionsList.add(corename);
}
// if we couldn't find it locally, look on other nodes
extractRemotePath(corename, origCorename, idx);
if (action != null) return;
}
// With a valid core...
if (core != null) {
MDCLoggingContext.setCore(core);
config = core.getSolrConfig();
// get or create/cache the parser for the core
SolrRequestParsers parser = config.getRequestParsers();
// Determine the handler from the url path if not set
// (we might already have selected the cores handler)
extractHandlerFromURLPath(parser);
if (action != null) return;
// With a valid handler and a valid core...
if (handler != null) {
// if not a /select, create the request
if (solrReq == null) {
solrReq = parser.parse(core, path, req);
}
if (usingAliases) {
processAliases(aliases, collectionsList);
}
action = PROCESS;
return; // we are done with a valid handler
}
}
log.debug("no handler or core retrieved for " + path + ", follow through...");
action = PASSTHROUGH;
}
