/**
* make the hbase filter for selecting values of y-axis(response time) in order to select
* transactions in scatter chart. 4 bytes for elapsed time should be attached for the prefix of
* column qualifier for to use this filter.
*
* @param area
* @param offsetTransactionId
* @param offsetTransactionElapsed
* @return
*/
private Filter makeResponseTimeFilter(
final SelectedScatterArea area,
final TransactionId offsetTransactionId,
int offsetTransactionElapsed) {
// filter by response time
ResponseTimeRange responseTimeRange = area.getResponseTimeRange();
byte[] responseFrom = Bytes.toBytes(responseTimeRange.getFrom());
byte[] responseTo = Bytes.toBytes(responseTimeRange.getTo());
FilterList filterList = new FilterList(Operator.MUST_PASS_ALL);
filterList.addFilter(
new QualifierFilter(CompareOp.GREATER_OR_EQUAL, new BinaryPrefixComparator(responseFrom)));
filterList.addFilter(
new QualifierFilter(CompareOp.LESS_OR_EQUAL, new BinaryPrefixComparator(responseTo)));
// add offset
if (offsetTransactionId != null) {
final Buffer buffer = new AutomaticBuffer(32);
buffer.put(offsetTransactionElapsed);
buffer.putPrefixedString(offsetTransactionId.getAgentId());
buffer.putSVar(offsetTransactionId.getAgentStartTime());
buffer.putVar(offsetTransactionId.getTransactionSequence());
byte[] qualifierOffset = buffer.getBuffer();
filterList.addFilter(
new QualifierFilter(CompareOp.GREATER, new BinaryPrefixComparator(qualifierOffset)));
}
return filterList;
}
@Override
public List<Dot> scanTraceScatter(
String applicationName,
SelectedScatterArea area,
TransactionId offsetTransactionId,
int offsetTransactionElapsed,
int limit) {
if (applicationName == null) {
throw new NullPointerException("applicationName must not be null");
}
if (area == null) {
throw new NullPointerException("range must not be null");
}
if (limit < 0) {
throw new IllegalArgumentException("negative limit:" + limit);
}
logger.debug("scanTraceScatter");
Scan scan = createScan(applicationName, area.getTimeRange());
// method 1
// not used yet. instead, use another row mapper (testing)
// scan.setFilter(makeResponseTimeFilter(area, offsetTransactionId, offsetTransactionElapsed));
// method 2
ResponseTimeRange responseTimeRange = area.getResponseTimeRange();
TraceIndexScatterMapper2 mapper =
new TraceIndexScatterMapper2(responseTimeRange.getFrom(), responseTimeRange.getTo());
List<List<Dot>> dotListList =
hbaseOperations2.findParallel(
HBaseTables.APPLICATION_TRACE_INDEX,
scan,
traceIdRowKeyDistributor,
limit,
mapper,
APPLICATION_TRACE_INDEX_NUM_PARTITIONS);
List<Dot> result = new ArrayList<>();
for (List<Dot> dotList : dotListList) {
result.addAll(dotList);
}
return result;
}