use of com.linkedin.databus2.core.filter.SourceDbusFilter in project databus by linkedin.
the class TestSourceDbusFilter method testAllow.
@Test
public void testAllow() {
HashSet<Integer> sources = new HashSet<Integer>();
sources.add(23);
sources.add(45);
DbusEvent e = RngUtils.randomEvent((short) 23);
LOG.debug(e);
SourceDbusFilter sdFilter = new SourceDbusFilter(sources);
assertTrue(sdFilter.allow(e));
}
use of com.linkedin.databus2.core.filter.SourceDbusFilter in project databus by linkedin.
the class TestDbusEventBufferMult method batchReading.
private void batchReading(Set<Integer> srcIds, final int expectEvents, final int batchFetchSize) throws IOException, ScnNotFoundException, DatabusException, OffsetNotFoundException {
// for debug generate this line
String inputSrcIds = Arrays.toString(srcIds.toArray());
LOG.info("Reading events from " + inputSrcIds);
// create checkpoints
CheckpointMult cpMult = new CheckpointMult();
for (PhysicalSourceStaticConfig pConf : _pConfigs) {
PhysicalPartition pPart = pConf.getPhysicalPartition();
Checkpoint cp;
if (cpMult.getCheckpoint(pPart) == null) {
// needs a new checkpoint
cp = new Checkpoint();
cp.setFlexible();
cpMult.addCheckpoint(pPart, cp);
}
}
DbusEventBufferBatchReadable read = _eventBufferMult.getDbusEventBufferBatchReadable(srcIds, cpMult, null);
int totalRead = 0;
int numEventsRead = Integer.MAX_VALUE;
int numNonControlEventsRead = 0;
int maxIterNum = 100, iterCount = 0;
String prevEvent = "";
while (numEventsRead > 0) {
if (iterCount++ > maxIterNum) {
fail("Checkpoint doesn't work - it is a never-ending loop");
}
ByteArrayOutputStream jsonOut = new ByteArrayOutputStream();
WritableByteChannel jsonOutChannel = Channels.newChannel(jsonOut);
numEventsRead = read.streamEvents(false, batchFetchSize, jsonOutChannel, Encoding.JSON_PLAIN_VALUE, new SourceDbusFilter(srcIds)).getNumEventsStreamed();
totalRead += numEventsRead;
LOG.info("read for " + inputSrcIds + ": " + numEventsRead + " events");
byte[] jsonBytes = jsonOut.toByteArray();
if (jsonBytes.length == 0)
// nothing more to read
break;
String jsonString = new String(jsonBytes);
String[] jsonStrings = jsonString.split("\n");
assertEquals(jsonStrings.length, numEventsRead);
ObjectMapper mapper = new ObjectMapper();
for (int i = 0; i < jsonStrings.length; i++) {
// verify what was written
String evtStr = jsonStrings[i];
if (evtStr.equals(prevEvent)) {
// offered buffer is small. This check gets around the issue.
continue;
}
prevEvent = evtStr;
Map<String, Object> jsonMap = mapper.readValue(evtStr, new TypeReference<Map<String, Object>>() {
});
// assertEquals(jsonMap.size(), 10);
Integer srcId = (Integer) jsonMap.get("srcId");
if (!DbusEventUtils.isControlSrcId(srcId)) {
// not a control message
numNonControlEventsRead++;
Integer physicalPartitionId = (Integer) jsonMap.get("physicalPartitionId");
Integer logicalPartitionId = (Integer) jsonMap.get("logicalPartitionId");
PhysicalPartition pPartition = _eventBufferMult.getPhysicalPartition(srcId, new LogicalPartition(logicalPartitionId.shortValue()));
LOG.info("EVENT: " + jsonMap.toString());
assertTrue(srcIds.contains(srcId), "src id " + srcId + " doesn't match to " + inputSrcIds);
assertEquals(physicalPartitionId, pPartition.getId(), "physical partition id didn't match");
} else {
LOG.info("Control event: " + jsonMap.toString());
}
}
}
assertTrue(totalRead > numNonControlEventsRead);
assertEquals(numNonControlEventsRead, expectEvents);
}
use of com.linkedin.databus2.core.filter.SourceDbusFilter in project databus by linkedin.
the class ReadEventsRequestProcessor method process.
@Override
public DatabusRequest process(DatabusRequest request) throws IOException, RequestProcessingException, DatabusException {
boolean isDebug = LOG.isDebugEnabled();
try {
ObjectMapper objMapper = new ObjectMapper();
String checkpointString = request.getParams().getProperty(CHECKPOINT_PARAM, null);
String checkpointStringMult = request.getParams().getProperty(CHECKPOINT_PARAM_MULT, null);
int fetchSize = request.getRequiredIntParam(FETCH_SIZE_PARAM);
String formatStr = request.getRequiredStringParam(OUTPUT_FORMAT_PARAM);
Encoding enc = Encoding.valueOf(formatStr.toUpperCase());
String sourcesListStr = request.getParams().getProperty(SOURCES_PARAM, null);
String subsStr = request.getParams().getProperty(SUBS_PARAM, null);
String partitionInfoStr = request.getParams().getProperty(PARTITION_INFO_STRING);
String streamFromLatestSCNStr = request.getParams().getProperty(STREAM_FROM_LATEST_SCN);
String clientMaxEventVersionStr = request.getParams().getProperty(DatabusHttpHeaders.MAX_EVENT_VERSION);
int clientEventVersion = (clientMaxEventVersionStr != null) ? Integer.parseInt(clientMaxEventVersionStr) : DbusEventFactory.DBUS_EVENT_V1;
if (clientEventVersion < 0 || clientEventVersion == 1 || clientEventVersion > DbusEventFactory.DBUS_EVENT_V2) {
throw new InvalidRequestParamValueException(COMMAND_NAME, DatabusHttpHeaders.MAX_EVENT_VERSION, clientMaxEventVersionStr);
}
if (null == sourcesListStr && null == subsStr) {
throw new InvalidRequestParamValueException(COMMAND_NAME, SOURCES_PARAM + "|" + SUBS_PARAM, "null");
}
// TODO for now we separte the code paths to limit the impact on existing Databus 2 deployments (DDSDBUS-79)
// We have to get rid of this eventually and have a single data path.
boolean v2Mode = null == subsStr;
DbusKeyCompositeFilter keyCompositeFilter = null;
if (null != partitionInfoStr) {
try {
Map<Long, DbusKeyFilter> fMap = KeyFilterConfigJSONFactory.parseSrcIdFilterConfigMap(partitionInfoStr);
keyCompositeFilter = new DbusKeyCompositeFilter();
keyCompositeFilter.setFilterMap(fMap);
if (isDebug)
LOG.debug("keyCompositeFilter is :" + keyCompositeFilter);
} catch (Exception ex) {
String msg = "Got exception while parsing partition Configs. PartitionInfo is:" + partitionInfoStr;
LOG.error(msg, ex);
throw new InvalidRequestParamValueException(COMMAND_NAME, PARTITION_INFO_STRING, partitionInfoStr);
}
}
boolean streamFromLatestSCN = false;
if (null != streamFromLatestSCNStr) {
streamFromLatestSCN = Boolean.valueOf(streamFromLatestSCNStr);
}
long start = System.currentTimeMillis();
List<DatabusSubscription> subs = null;
// parse source ids
SourceIdNameRegistry srcRegistry = _relay.getSourcesIdNameRegistry();
HashSet<Integer> sourceIds = new HashSet<Integer>();
if (null != sourcesListStr) {
String[] sourcesList = sourcesListStr.split(",");
for (String sourceId : sourcesList) {
try {
Integer srcId = Integer.valueOf(sourceId);
sourceIds.add(srcId);
} catch (NumberFormatException nfe) {
HttpStatisticsCollector globalHttpStatsCollector = _relay.getHttpStatisticsCollector();
if (null != globalHttpStatsCollector) {
globalHttpStatsCollector.registerInvalidStreamRequest();
}
throw new InvalidRequestParamValueException(COMMAND_NAME, SOURCES_PARAM, sourceId);
}
}
}
// process explicit subscriptions and generate respective logical partition filters
NavigableSet<PhysicalPartitionKey> ppartKeys = null;
if (null != subsStr) {
List<DatabusSubscription.Builder> subsBuilder = null;
subsBuilder = objMapper.readValue(subsStr, new TypeReference<List<DatabusSubscription.Builder>>() {
});
subs = new ArrayList<DatabusSubscription>(subsBuilder.size());
for (DatabusSubscription.Builder subBuilder : subsBuilder) {
subs.add(subBuilder.build());
}
ppartKeys = new TreeSet<PhysicalPartitionKey>();
for (DatabusSubscription sub : subs) {
PhysicalPartition ppart = sub.getPhysicalPartition();
if (ppart.isAnyPartitionWildcard()) {
ppartKeys = _eventBuffer.getAllPhysicalPartitionKeys();
break;
} else {
ppartKeys.add(new PhysicalPartitionKey(ppart));
}
}
}
// Need to make sure that we don't have tests that send requests in this form.
if (subs != null && checkpointStringMult == null && checkpointString != null) {
throw new RequestProcessingException("Both Subscriptions and CheckpointMult should be present");
}
// convert source ids into subscriptions
if (null == subs)
subs = new ArrayList<DatabusSubscription>();
for (Integer srcId : sourceIds) {
LogicalSource lsource = srcRegistry.getSource(srcId);
if (lsource == null)
throw new InvalidRequestParamValueException(COMMAND_NAME, SOURCES_PARAM, srcId.toString());
if (isDebug)
LOG.debug("registry returns " + lsource + " for srcid=" + srcId);
DatabusSubscription newSub = DatabusSubscription.createSimpleSourceSubscription(lsource);
subs.add(newSub);
}
DbusFilter ppartFilters = null;
if (subs.size() > 0) {
try {
ppartFilters = _eventBuffer.constructFilters(subs);
} catch (DatabusException de) {
throw new RequestProcessingException("unable to generate physical partitions filters:" + de.getMessage(), de);
}
}
ConjunctionDbusFilter filters = new ConjunctionDbusFilter();
// Source filter comes first
if (v2Mode)
filters.addFilter(new SourceDbusFilter(sourceIds));
else if (null != ppartFilters)
filters.addFilter(ppartFilters);
/*
// Key range filter comes next
if ((keyMin >0) && (keyMax > 0))
{
filters.addFilter(new KeyRangeFilter(keyMin, keyMax));
}
*/
if (null != keyCompositeFilter) {
filters.addFilter(keyCompositeFilter);
}
// need to update registerStreamRequest to support Mult checkpoint TODO (DDSDBUS-80)
// temp solution
// 3 options:
// 1. checkpointStringMult not null - generate checkpoint from it
// 2. checkpointStringMult null, checkpointString not null - create empty CheckpointMult
// and add create Checkpoint(checkpointString) and add it to cpMult;
// 3 both are null - create empty CheckpointMult and add empty Checkpoint to it for each ppartition
PhysicalPartition pPartition;
Checkpoint cp = null;
CheckpointMult cpMult = null;
if (checkpointStringMult != null) {
try {
cpMult = new CheckpointMult(checkpointStringMult);
} catch (InvalidParameterSpecException e) {
LOG.error("Invalid CheckpointMult:" + checkpointStringMult, e);
throw new InvalidRequestParamValueException("stream", "CheckpointMult", checkpointStringMult);
}
} else {
// there is no checkpoint - create an empty one
cpMult = new CheckpointMult();
Iterator<Integer> it = sourceIds.iterator();
while (it.hasNext()) {
Integer srcId = it.next();
pPartition = _eventBuffer.getPhysicalPartition(srcId);
if (pPartition == null)
throw new RequestProcessingException("unable to find physical partitions for source:" + srcId);
if (checkpointString != null) {
cp = new Checkpoint(checkpointString);
} else {
cp = new Checkpoint();
cp.setFlexible();
}
cpMult.addCheckpoint(pPartition, cp);
}
}
if (isDebug)
LOG.debug("checkpointStringMult = " + checkpointStringMult + ";singlecheckpointString=" + checkpointString + ";CPM=" + cpMult);
// of the server context.
if (cpMult.getCursorPartition() == null) {
cpMult.setCursorPartition(request.getCursorPartition());
}
if (isDebug) {
if (cpMult.getCursorPartition() != null) {
LOG.debug("Using physical paritition cursor " + cpMult.getCursorPartition());
}
}
// for registerStreamRequest we need a single Checkpoint (TODO - fix it) (DDSDBUS-81)
if (cp == null) {
Iterator<Integer> it = sourceIds.iterator();
if (it.hasNext()) {
Integer srcId = it.next();
pPartition = _eventBuffer.getPhysicalPartition(srcId);
cp = cpMult.getCheckpoint(pPartition);
} else {
cp = new Checkpoint();
cp.setFlexible();
}
}
if (null != checkpointString && isDebug)
LOG.debug("About to stream from cp: " + checkpointString.toString());
HttpStatisticsCollector globalHttpStatsCollector = _relay.getHttpStatisticsCollector();
HttpStatisticsCollector connHttpStatsCollector = null;
if (null != globalHttpStatsCollector) {
connHttpStatsCollector = (HttpStatisticsCollector) request.getParams().get(globalHttpStatsCollector.getName());
}
if (null != globalHttpStatsCollector)
globalHttpStatsCollector.registerStreamRequest(cp, sourceIds);
StatsCollectors<DbusEventsStatisticsCollector> statsCollectors = _relay.getOutBoundStatsCollectors();
try {
DbusEventBufferBatchReadable bufRead = v2Mode ? _eventBuffer.getDbusEventBufferBatchReadable(sourceIds, cpMult, statsCollectors) : _eventBuffer.getDbusEventBufferBatchReadable(cpMult, ppartKeys, statsCollectors);
int eventsRead = 0;
int minPendingEventSize = 0;
StreamEventsResult result = null;
bufRead.setClientMaxEventVersion(clientEventVersion);
if (v2Mode) {
result = bufRead.streamEvents(streamFromLatestSCN, fetchSize, request.getResponseContent(), enc, filters);
eventsRead = result.getNumEventsStreamed();
minPendingEventSize = result.getSizeOfPendingEvent();
if (isDebug) {
LOG.debug("Process: streamed " + eventsRead + " from sources " + Arrays.toString(sourceIds.toArray()));
// can be used for debugging to stream from a cp
LOG.debug("CP=" + cpMult);
}
// if (null != statsCollectors) statsCollectors.mergeStatsCollectors();
} else {
result = bufRead.streamEvents(streamFromLatestSCN, fetchSize, request.getResponseContent(), enc, filters);
eventsRead = result.getNumEventsStreamed();
minPendingEventSize = result.getSizeOfPendingEvent();
if (isDebug)
LOG.debug("Process: streamed " + eventsRead + " with subscriptions " + subs);
cpMult = bufRead.getCheckpointMult();
if (cpMult != null) {
request.setCursorPartition(cpMult.getCursorPartition());
}
}
if (eventsRead == 0 && minPendingEventSize > 0) {
// Append a header to indicate to the client that we do have at least one event to
// send, but it is too large to fit into client's offered buffer.
request.getResponseContent().addMetadata(DatabusHttpHeaders.DATABUS_PENDING_EVENT_SIZE, minPendingEventSize);
LOG.debug("Returning 0 events but have pending event of size " + minPendingEventSize);
}
} catch (ScnNotFoundException snfe) {
if (null != globalHttpStatsCollector) {
globalHttpStatsCollector.registerScnNotFoundStreamResponse();
}
throw new RequestProcessingException(snfe);
} catch (OffsetNotFoundException snfe) {
LOG.error("OffsetNotFound", snfe);
if (null != globalHttpStatsCollector) {
globalHttpStatsCollector.registerScnNotFoundStreamResponse();
}
throw new RequestProcessingException(snfe);
}
if (null != connHttpStatsCollector) {
connHttpStatsCollector.registerStreamResponse(System.currentTimeMillis() - start);
globalHttpStatsCollector.merge(connHttpStatsCollector);
connHttpStatsCollector.reset();
} else if (null != globalHttpStatsCollector) {
globalHttpStatsCollector.registerStreamResponse(System.currentTimeMillis() - start);
}
} catch (InvalidRequestParamValueException e) {
HttpStatisticsCollector globalHttpStatsCollector = _relay.getHttpStatisticsCollector();
if (null != globalHttpStatsCollector) {
globalHttpStatsCollector.registerInvalidStreamRequest();
}
throw e;
}
return request;
}
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