@Override
public List<Object> deserializeKeyAndValue(byte[] key, byte[] value) {
Long ts = converter.toNanoseconds(Bytes.toLong(key));
byte[] packetHeaderized = PcapHelper.addPacketHeader(ts, value, endianness);
byte[] globalHeaderized = PcapHelper.addGlobalHeader(packetHeaderized, endianness);
return new Values(ImmutableList.of(new LongWritable(ts), new BytesWritable(globalHeaderized)));
}
public Iterable<String> getPaths(FileSystem fs, Path basePath, long begin, long end)
throws IOException {
List<String> ret = new ArrayList<>();
Iterator<Path> files = listFiles(fs, basePath).iterator();
/*
The trick here is that we need a trailing left endpoint, because we only capture the start of the
timeseries kept in the file.
*/
boolean isFirst = true;
Path leftEndpoint = files.hasNext() ? files.next() : null;
if (leftEndpoint == null) {
return ret;
}
{
Long ts = PcapHelper.getTimestamp(leftEndpoint.getName());
if (ts != null
&& Long.compareUnsigned(ts, begin) >= 0
&& Long.compareUnsigned(ts, end) <= 0) {
ret.add(leftEndpoint.toString());
isFirst = false;
}
}
while (files.hasNext()) {
Path p = files.next();
Long ts = PcapHelper.getTimestamp(p.getName());
if (ts != null
&& Long.compareUnsigned(ts, begin) >= 0
&& Long.compareUnsigned(ts, end) <= 0) {
if (isFirst && leftEndpoint != null) {
ret.add(leftEndpoint.toString());
}
if (isFirst) {
isFirst = false;
}
ret.add(p.toString());
} else {
leftEndpoint = p;
}
}
if (LOG.isDebugEnabled()) {
LOG.debug("Including files " + Joiner.on(",").join(ret));
}
return ret;
}
private Stream<PacketInfo> filteredPacketInfo(BytesWritable value) throws IOException {
return PcapHelper.toPacketInfo(value.copyBytes()).stream().filter(filter);
}
