private static FullHttpResponse newHttpResponseWithStackTrace(
Exception e, HttpResponseStatus status, @Nullable String simplifiedMessage) {
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
StringBuilder sb = new StringBuilder();
try {
JsonGenerator jg = jsonFactory.createGenerator(CharStreams.asWriter(sb));
jg.writeStartObject();
String message;
if (simplifiedMessage == null) {
Throwable cause = e;
Throwable childCause = cause.getCause();
while (childCause != null) {
cause = childCause;
childCause = cause.getCause();
}
message = cause.getMessage();
} else {
message = simplifiedMessage;
}
jg.writeStringField("message", message);
jg.writeStringField("stackTrace", sw.toString());
jg.writeEndObject();
jg.close();
return HttpServices.createJsonResponse(sb.toString(), status);
} catch (IOException f) {
logger.error(f.getMessage(), f);
return new DefaultFullHttpResponse(HTTP_1_1, INTERNAL_SERVER_ERROR);
}
}
@GET("/backend/aggregate/points")
String getPoints(String content) throws IOException {
logger.debug("getPoints(): content={}", content);
PointsRequest request = ObjectMappers.readRequiredValue(mapper, content, PointsRequest.class);
List<AggregatePoint> points = aggregateDao.readAggregates(request.getFrom(), request.getTo());
StringBuilder sb = new StringBuilder();
JsonGenerator jg = mapper.getFactory().createGenerator(CharStreams.asWriter(sb));
jg.writeStartObject();
jg.writeArrayFieldStart("points");
for (AggregatePoint point : points) {
jg.writeStartArray();
jg.writeNumber(point.getCaptureTime());
long durationAverage;
if (point.getTraceCount() == 0) {
durationAverage = 0;
} else {
durationAverage = point.getDurationTotal() / point.getTraceCount();
}
jg.writeNumber(durationAverage / 1000000000.0);
jg.writeNumber(point.getTraceCount());
jg.writeEndArray();
}
jg.writeEndArray();
jg.writeNumberField("fixedAggregateIntervalSeconds", fixedAggregateIntervalSeconds);
jg.writeEndObject();
jg.close();
return sb.toString();
}
private static FullHttpResponse newHttpResponseWithMessage(
HttpResponseStatus status, @Nullable String message) {
// this is an "expected" exception, no need to send back stack trace
StringBuilder sb = new StringBuilder();
try {
JsonGenerator jg = jsonFactory.createGenerator(CharStreams.asWriter(sb));
jg.writeStartObject();
jg.writeStringField("message", message);
jg.writeEndObject();
jg.close();
return HttpServices.createJsonResponse(sb.toString(), status);
} catch (IOException f) {
logger.error(f.getMessage(), f);
return new DefaultFullHttpResponse(HTTP_1_1, INTERNAL_SERVER_ERROR);
}
}