protected ParsedParams parseParams(String type, String param) throws SyntaxError, IOException {
SolrParams localParams = QueryParsing.getLocalParams(param, req.getParams());
DocSet docs = docsOrig;
String facetValue = param;
String key = param;
List<String> tags = Collections.emptyList();
int threads = -1;
if (localParams == null) {
SolrParams params = global;
SolrParams required = new RequiredSolrParams(params);
return new ParsedParams(localParams, params, required, facetValue, docs, key, tags, threads);
}
SolrParams params = SolrParams.wrapDefaults(localParams, global);
SolrParams required = new RequiredSolrParams(params);
// remove local params unless it's a query
if (type != FacetParams.FACET_QUERY) { // TODO Cut over to an Enum here
facetValue = localParams.get(CommonParams.VALUE);
}
// reset set the default key now that localParams have been removed
key = facetValue;
// allow explicit set of the key
key = localParams.get(CommonParams.OUTPUT_KEY, key);
String tagStr = localParams.get(CommonParams.TAG);
tags = tagStr == null ? Collections.<String>emptyList() : StrUtils.splitSmart(tagStr, ',');
String threadStr = localParams.get(CommonParams.THREADS);
if (threadStr != null) {
threads = Integer.parseInt(threadStr);
}
// figure out if we need a new base DocSet
String excludeStr = localParams.get(CommonParams.EXCLUDE);
if (excludeStr == null)
return new ParsedParams(localParams, params, required, facetValue, docs, key, tags, threads);
List<String> excludeTagList = StrUtils.splitSmart(excludeStr, ',');
docs = computeDocSet(docs, excludeTagList);
return new ParsedParams(localParams, params, required, facetValue, docs, key, tags, threads);
}
/**
* Returns a list of value constraints and the associated facet counts for each facet field
* specified in the params.
*
* @see FacetParams#FACET_FIELD
* @see #getFieldMissingCount
* @see #getFacetTermEnumCounts
*/
@SuppressWarnings("unchecked")
public NamedList<Object> getFacetFieldCounts() throws IOException, SyntaxError {
NamedList<Object> res = new SimpleOrderedMap<>();
String[] facetFs = global.getParams(FacetParams.FACET_FIELD);
if (null == facetFs) {
return res;
}
// Passing a negative number for FACET_THREADS implies an unlimited number of threads is
// acceptable.
// Also, a subtlety of directExecutor is that no matter how many times you "submit" a job, it's
// really
// just a method call in that it's run by the calling thread.
int maxThreads = req.getParams().getInt(FacetParams.FACET_THREADS, 0);
Executor executor = maxThreads == 0 ? directExecutor : facetExecutor;
final Semaphore semaphore = new Semaphore((maxThreads <= 0) ? Integer.MAX_VALUE : maxThreads);
List<Future<NamedList>> futures = new ArrayList<>(facetFs.length);
try {
// Loop over fields; submit to executor, keeping the future
for (String f : facetFs) {
final ParsedParams parsed = parseParams(FacetParams.FACET_FIELD, f);
final SolrParams localParams = parsed.localParams;
final String termList = localParams == null ? null : localParams.get(CommonParams.TERMS);
final String key = parsed.key;
final String facetValue = parsed.facetValue;
Callable<NamedList> callable =
new Callable<NamedList>() {
@Override
public NamedList call() throws Exception {
try {
NamedList<Object> result = new SimpleOrderedMap<>();
if (termList != null) {
List<String> terms = StrUtils.splitSmart(termList, ",", true);
result.add(key, getListedTermCounts(facetValue, parsed, terms));
} else {
result.add(key, getTermCounts(facetValue, parsed));
}
return result;
} catch (SolrException se) {
throw se;
} catch (Exception e) {
throw new SolrException(
ErrorCode.SERVER_ERROR, "Exception during facet.field: " + facetValue, e);
} finally {
semaphore.release();
}
}
};
RunnableFuture<NamedList> runnableFuture = new FutureTask<>(callable);
semaphore.acquire(); // may block and/or interrupt
executor.execute(runnableFuture); // releases semaphore when done
futures.add(runnableFuture);
} // facetFs loop
// Loop over futures to get the values. The order is the same as facetFs but shouldn't matter.
for (Future<NamedList> future : futures) {
res.addAll(future.get());
}
assert semaphore.availablePermits() >= maxThreads;
} catch (InterruptedException e) {
throw new SolrException(
SolrException.ErrorCode.SERVER_ERROR,
"Error while processing facet fields: InterruptedException",
e);
} catch (ExecutionException ee) {
Throwable e = ee.getCause(); // unwrap
if (e instanceof RuntimeException) {
throw (RuntimeException) e;
}
throw new SolrException(
SolrException.ErrorCode.SERVER_ERROR,
"Error while processing facet fields: " + e.toString(),
e);
}
return res;
}
