String queryId = null;
final boolean isSmile = APPLICATION_SMILE.equals(req.getContentType());
ObjectMapper objectMapper = isSmile ? smileMapper : jsonMapper;
final ObjectWriter jsonWriter = req.getParameter("pretty") == null
? objectMapper.writer()
: objectMapper.writerWithDefaultPrettyPrinter();
try {
requestQuery = ByteStreams.toByteArray(req.getInputStream());
query = objectMapper.readValue(requestQuery, Query.class);
queryId = query.getId();
if (queryId == null) {
queryId = UUID.randomUUID().toString();
query = query.withId(queryId);
}
if (query.getContextValue("timeout") == null) {
query = query.withOverriddenContext(
ImmutableMap.of(
"timeout",
config.getMaxIdleTime().toStandardDuration().getMillis()
)
);
}
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 {
long requestTime = System.currentTimeMillis() - start;
emitter.emit(
QueryMetricUtil.makeRequestTimeMetric(jsonMapper, query, req.getRemoteAddr())
.build("request/time", requestTime)
);
requestLogger.log(
new RequestLogLine(
new DateTime(),
req.getRemoteAddr(),
query,
new QueryStats(
ImmutableMap.<String, Object>of(
"request/time", requestTime,
"success", true
)
)
)
);
return Response
.ok(
new StreamingOutput()
{
@Override
public void write(OutputStream outputStream) throws IOException, WebApplicationException
{
// json serializer will always close the yielder
jsonWriter.writeValue(outputStream, yielder);
outputStream.close();
}
},
isSmile ? APPLICATION_JSON : APPLICATION_SMILE
)
.header("X-Druid-Query-Id", queryId)
.header("X-Druid-Response-Context", jsonMapper.writeValueAsString(responseContext))
.build();
}
catch (Exception e) {
// make sure to close yieder 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);
requestLogger.log(
new RequestLogLine(
new DateTime(),
req.getRemoteAddr(),
query,
new QueryStats(
ImmutableMap.<String, Object>of(
"success",
false,
"interrupted",
true,
"reason",
e.toString()
)
)
)
);
}
catch (Exception e2) {
log.error(e2, "Unable to log query [%s]!", query);
}
return Response.serverError().entity(
jsonWriter.writeValueAsString(
ImmutableMap.of(
"error", e.getMessage()
)
)
).build();
}
catch (Exception e) {
final String queryString =
query == null
? (isSmile ? "smile_unknown" : new String(requestQuery, Charsets.UTF_8))
: query.toString();
log.warn(e, "Exception occurred on request [%s]", queryString);
try {
requestLogger.log(
new RequestLogLine(
new DateTime(),
req.getRemoteAddr(),
query,
new QueryStats(ImmutableMap.<String, Object>of("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().entity(
jsonWriter.writeValueAsString(
ImmutableMap.of(
"error", e.getMessage() == null ? "null exception" : e.getMessage()
)
)
).build();