@Override
public <OutType> Yielder<OutType> toYielder(
final OutType initValue, final YieldingAccumulator<OutType, T> accumulator) {
notifyLatch.countDown();
try {
waitYieldLatch.await(25, TimeUnit.MILLISECONDS);
} catch (Exception e) {
throw Throwables.propagate(e);
}
final Yielder<OutType> baseYielder = baseSequence.toYielder(initValue, accumulator);
return new Yielder<OutType>() {
@Override
public OutType get() {
try {
waitLatch.await(25, TimeUnit.MILLISECONDS);
} catch (Exception e) {
throw Throwables.propagate(e);
}
return baseYielder.get();
}
@Override
public Yielder<OutType> next(OutType initValue) {
return baseYielder.next(initValue);
}
@Override
public boolean isDone() {
return baseYielder.isDone();
}
@Override
public void close() throws IOException {
baseYielder.close();
}
};
}
@POST
@Produces({MediaType.APPLICATION_JSON, SmileMediaTypes.APPLICATION_JACKSON_SMILE})
@Consumes({
MediaType.APPLICATION_JSON,
SmileMediaTypes.APPLICATION_JACKSON_SMILE,
APPLICATION_SMILE
})
public Response doPost(
InputStream in,
@QueryParam("pretty") String pretty,
@Context
final HttpServletRequest req // used only to get request content-type and remote address
) throws IOException {
final long start = System.currentTimeMillis();
Query query = null;
String queryId = null;
final String reqContentType = req.getContentType();
final boolean isSmile =
SmileMediaTypes.APPLICATION_JACKSON_SMILE.equals(reqContentType)
|| APPLICATION_SMILE.equals(reqContentType);
final String contentType =
isSmile ? SmileMediaTypes.APPLICATION_JACKSON_SMILE : MediaType.APPLICATION_JSON;
ObjectMapper objectMapper = isSmile ? smileMapper : jsonMapper;
final ObjectWriter jsonWriter =
pretty != null ? objectMapper.writerWithDefaultPrettyPrinter() : objectMapper.writer();
final String currThreadName = Thread.currentThread().getName();
try {
query = objectMapper.readValue(in, Query.class);
queryId = query.getId();
if (queryId == null) {
queryId = UUID.randomUUID().toString();
query = query.withId(queryId);
}
if (query.getContextValue(QueryContextKeys.TIMEOUT) == null) {
query =
query.withOverriddenContext(
ImmutableMap.of(
QueryContextKeys.TIMEOUT,
config.getMaxIdleTime().toStandardDuration().getMillis()));
}
Thread.currentThread()
.setName(
String.format(
"%s[%s_%s_%s]", currThreadName, query.getType(), query.getDataSource(), queryId));
if (log.isDebugEnabled()) {
log.debug("Got query [%s]", query);
}
final Map<String, Object> responseContext = new MapMaker().makeMap();
final Sequence res = query.run(texasRanger, responseContext);
final Sequence results;
if (res == null) {
results = Sequences.empty();
} else {
results = res;
}
final Yielder yielder =
results.toYielder(
null,
new YieldingAccumulator() {
@Override
public Object accumulate(Object accumulated, Object in) {
yield();
return in;
}
});
try {
final Query theQuery = query;
Response.ResponseBuilder builder =
Response.ok(
new StreamingOutput() {
@Override
public void write(OutputStream outputStream)
throws IOException, WebApplicationException {
// json serializer will always close the yielder
CountingOutputStream os = new CountingOutputStream(outputStream);
jsonWriter.writeValue(os, yielder);
os
.flush(); // Some types of OutputStream suppress flush errors in the
// .close() method.
os.close();
final long queryTime = System.currentTimeMillis() - start;
emitter.emit(
DruidMetrics.makeQueryTimeMetric(
jsonMapper, theQuery, req.getRemoteAddr())
.setDimension("success", "true")
.build("query/time", queryTime));
emitter.emit(
DruidMetrics.makeQueryTimeMetric(
jsonMapper, theQuery, req.getRemoteAddr())
.build("query/bytes", os.getCount()));
requestLogger.log(
new RequestLogLine(
new DateTime(start),
req.getRemoteAddr(),
theQuery,
new QueryStats(
ImmutableMap.<String, Object>of(
"query/time",
queryTime,
"query/bytes",
os.getCount(),
"success",
true))));
}
},
contentType)
.header("X-Druid-Query-Id", queryId);
// Limit the response-context header, see https://github.com/druid-io/druid/issues/2331
// Note that Response.ResponseBuilder.header(String key,Object value).build() calls
// value.toString()
// and encodes the string using ASCII, so 1 char is = 1 byte
String responseCtxString = jsonMapper.writeValueAsString(responseContext);
if (responseCtxString.length() > RESPONSE_CTX_HEADER_LEN_LIMIT) {
log.warn(
"Response Context truncated for id [%s] . Full context is [%s].",
queryId, responseCtxString);
responseCtxString = responseCtxString.substring(0, RESPONSE_CTX_HEADER_LEN_LIMIT);
}
return builder.header("X-Druid-Response-Context", responseCtxString).build();
} catch (Exception e) {
// make sure to close yielder if anything happened before starting to serialize the
// response.
yielder.close();
throw Throwables.propagate(e);
} finally {
// do not close yielder here, since we do not want to close the yielder prior to
// StreamingOutput having iterated over all the results
}
} catch (QueryInterruptedException e) {
try {
log.info("%s [%s]", e.getMessage(), queryId);
final long queryTime = System.currentTimeMillis() - start;
emitter.emit(
DruidMetrics.makeQueryTimeMetric(jsonMapper, query, req.getRemoteAddr())
.setDimension("success", "false")
.build("query/time", queryTime));
requestLogger.log(
new RequestLogLine(
new DateTime(start),
req.getRemoteAddr(),
query,
new QueryStats(
ImmutableMap.<String, Object>of(
"query/time",
queryTime,
"success",
false,
"interrupted",
true,
"reason",
e.toString()))));
} catch (Exception e2) {
log.error(e2, "Unable to log query [%s]!", query);
}
return Response.serverError()
.type(contentType)
.entity(
jsonWriter.writeValueAsBytes(
ImmutableMap.of(
"error", e.getMessage() == null ? "null exception" : e.getMessage())))
.build();
} catch (Exception e) {
// Input stream has already been consumed by the json object mapper if query == null
final String queryString = query == null ? "unparsable query" : query.toString();
log.warn(e, "Exception occurred on request [%s]", queryString);
try {
final long queryTime = System.currentTimeMillis() - start;
emitter.emit(
DruidMetrics.makeQueryTimeMetric(jsonMapper, query, req.getRemoteAddr())
.setDimension("success", "false")
.build("query/time", queryTime));
requestLogger.log(
new RequestLogLine(
new DateTime(start),
req.getRemoteAddr(),
query,
new QueryStats(
ImmutableMap.<String, Object>of(
"query/time", queryTime, "success", false, "exception", e.toString()))));
} catch (Exception e2) {
log.error(e2, "Unable to log query [%s]!", queryString);
}
log.makeAlert(e, "Exception handling request")
.addData("exception", e.toString())
.addData("query", queryString)
.addData("peer", req.getRemoteAddr())
.emit();
return Response.serverError()
.type(contentType)
.entity(
jsonWriter.writeValueAsBytes(
ImmutableMap.of(
"error", e.getMessage() == null ? "null exception" : e.getMessage())))
.build();
} finally {
Thread.currentThread().setName(currThreadName);
}
}
@Override
public Sequence<Result<SearchResultValue>> run(
final Query<Result<SearchResultValue>> input, Map<String, Object> responseContext) {
if (!(input instanceof SearchQuery)) {
throw new ISE("Got a [%s] which isn't a %s", input.getClass(), SearchQuery.class);
}
final SearchQuery query = (SearchQuery) input;
final Filter filter = Filters.convertDimensionFilters(query.getDimensionsFilter());
final List<DimensionSpec> dimensions = query.getDimensions();
final SearchQuerySpec searchQuerySpec = query.getQuery();
final int limit = query.getLimit();
final boolean descending = query.isDescending();
// Closing this will cause segfaults in unit tests.
final QueryableIndex index = segment.asQueryableIndex();
if (index != null) {
final TreeMap<SearchHit, MutableInt> retVal =
Maps.newTreeMap(query.getSort().getComparator());
Iterable<DimensionSpec> dimsToSearch;
if (dimensions == null || dimensions.isEmpty()) {
dimsToSearch =
Iterables.transform(index.getAvailableDimensions(), Druids.DIMENSION_IDENTITY);
} else {
dimsToSearch = dimensions;
}
final BitmapFactory bitmapFactory = index.getBitmapFactoryForDimensions();
final ImmutableBitmap baseFilter =
filter == null
? null
: filter.getBitmapIndex(new ColumnSelectorBitmapIndexSelector(bitmapFactory, index));
for (DimensionSpec dimension : dimsToSearch) {
final Column column = index.getColumn(dimension.getDimension());
if (column == null) {
continue;
}
final BitmapIndex bitmapIndex = column.getBitmapIndex();
ExtractionFn extractionFn = dimension.getExtractionFn();
if (extractionFn == null) {
extractionFn = IdentityExtractionFn.getInstance();
}
if (bitmapIndex != null) {
for (int i = 0; i < bitmapIndex.getCardinality(); ++i) {
String dimVal = Strings.nullToEmpty(extractionFn.apply(bitmapIndex.getValue(i)));
if (!searchQuerySpec.accept(dimVal)) {
continue;
}
ImmutableBitmap bitmap = bitmapIndex.getBitmap(i);
if (baseFilter != null) {
bitmap = bitmapFactory.intersection(Arrays.asList(baseFilter, bitmap));
}
if (bitmap.size() > 0) {
MutableInt counter = new MutableInt(bitmap.size());
MutableInt prev =
retVal.put(new SearchHit(dimension.getOutputName(), dimVal), counter);
if (prev != null) {
counter.add(prev.intValue());
}
if (retVal.size() >= limit) {
return makeReturnResult(limit, retVal);
}
}
}
}
}
return makeReturnResult(limit, retVal);
}
final StorageAdapter adapter = segment.asStorageAdapter();
if (adapter == null) {
log.makeAlert("WTF!? Unable to process search query on segment.")
.addData("segment", segment.getIdentifier())
.addData("query", query)
.emit();
throw new ISE(
"Null storage adapter found. Probably trying to issue a query against a segment being memory unmapped.");
}
final Iterable<DimensionSpec> dimsToSearch;
if (dimensions == null || dimensions.isEmpty()) {
dimsToSearch =
Iterables.transform(adapter.getAvailableDimensions(), Druids.DIMENSION_IDENTITY);
} else {
dimsToSearch = dimensions;
}
final Sequence<Cursor> cursors =
adapter.makeCursors(filter, segment.getDataInterval(), QueryGranularity.ALL, descending);
final TreeMap<SearchHit, MutableInt> retVal =
cursors.accumulate(
Maps.<SearchHit, SearchHit, MutableInt>newTreeMap(query.getSort().getComparator()),
new Accumulator<TreeMap<SearchHit, MutableInt>, Cursor>() {
@Override
public TreeMap<SearchHit, MutableInt> accumulate(
TreeMap<SearchHit, MutableInt> set, Cursor cursor) {
if (set.size() >= limit) {
return set;
}
Map<String, DimensionSelector> dimSelectors = Maps.newHashMap();
for (DimensionSpec dim : dimsToSearch) {
dimSelectors.put(dim.getOutputName(), cursor.makeDimensionSelector(dim));
}
while (!cursor.isDone()) {
for (Map.Entry<String, DimensionSelector> entry : dimSelectors.entrySet()) {
final DimensionSelector selector = entry.getValue();
if (selector != null) {
final IndexedInts vals = selector.getRow();
for (int i = 0; i < vals.size(); ++i) {
final String dimVal = selector.lookupName(vals.get(i));
if (searchQuerySpec.accept(dimVal)) {
MutableInt counter = new MutableInt(1);
MutableInt prev = set.put(new SearchHit(entry.getKey(), dimVal), counter);
if (prev != null) {
counter.add(prev.intValue());
}
if (set.size() >= limit) {
return set;
}
}
}
}
}
cursor.advance();
}
return set;
}
});
return makeReturnResult(limit, retVal);
}
