@Override
public String scanQueryPoint(double latitude, double longitude) {
this.getStatLog(STAT_FILE_NAME);
long sTime = System.currentTimeMillis();
// build up a raster
XRaster raster = new XRaster(this.space, this.min_size_of_height, this.max_num_of_column);
ResultScanner rScanner = null;
try {
// match rect to find the subspace it belongs to
XBox match_box = raster.locate(latitude, Math.abs(longitude));
System.out.println("match_box is : " + match_box.toString());
String[] rowRange = new String[2];
rowRange[0] = match_box.getRow();
rowRange[1] = match_box.getRow() + "-*";
// the version here is harded coded, because i cannot get how many
// objects in one cell now
rScanner =
this.hbaseUtil.getResultSet(
rowRange, null, this.familyName, new String[] {match_box.getColumn()}, 1000000);
BixiReader reader = new BixiReader();
int count = 0;
int row = 0;
String stationName = null;
for (Result r : rScanner) {
NavigableMap<byte[], NavigableMap<byte[], NavigableMap<Long, byte[]>>> resultMap =
r.getMap();
row++;
for (byte[] family : resultMap.keySet()) {
NavigableMap<byte[], NavigableMap<Long, byte[]>> columns = resultMap.get(family);
for (byte[] col : columns.keySet()) {
NavigableMap<Long, byte[]> values = columns.get(col);
for (Long version : values.keySet()) {
count++;
// get the distance between this point and the given
// point
XStation station = reader.getStationFromJson(Bytes.toString(values.get(version)));
if ((station.getLatitude() == latitude && station.getlongitude() == longitude)) {
stationName = station.getId();
break;
}
}
if (stationName != null) break;
}
if (stationName != null) break;
}
if (stationName != null) break;
}
long eTime = System.currentTimeMillis();
System.out.println(
"count=>" + count + ";time=>" + (eTime - sTime) + ";result=>" + stationName);
String outStr =
"q=point;m=scan;count=>"
+ count
+ ";time=>"
+ (eTime - sTime)
+ ";row=>"
+ row
+ ";result=>"
+ stationName;
this.writeStat(outStr);
return stationName;
} catch (Exception e) {
e.printStackTrace();
} finally {
this.hbaseUtil.closeTableHandler();
this.closeStatLog();
}
return null;
}
@Override
public String copQueryPoint(final double latitude, final double longitude) {
this.getStatLog(STAT_FILE_NAME);
long s_time = System.currentTimeMillis();
try {
/** Step1** Call back class definition * */
class BixiCallBack implements Batch.Callback<String> {
String res = null;
int count = 0;
QueryAbstraction query = null;
public BixiCallBack(QueryAbstraction query) {
this.query = query;
}
@Override
public void update(byte[] region, byte[] row, String result) {
count++;
String outStr =
"endTime=>"
+ System.currentTimeMillis()
+ ";region=>"
+ Bytes.toString(region)
+ ";count=>"
+ count
+ ";result=>"
+ result;
this.query.writeStat(outStr);
outStr = query.regions.get(Bytes.toString(region)).toString();
this.query.writeStat(outStr);
res = result;
}
}
BixiCallBack callBack = new BixiCallBack(this);
/** Step2** generate the scan ********** */
// build up the Raster
XRaster raster = new XRaster(this.space, this.min_size_of_height, this.max_num_of_column);
XBox match_box = raster.locate(latitude, Math.abs(longitude));
System.out.println("match_box is : " + match_box.toString());
String[] rowRange = new String[2];
rowRange[0] = match_box.getRow();
rowRange[1] = match_box.getRow() + "0";
// generate the scan
final Scan scan =
hbaseUtil.generateScan(
rowRange,
null,
new String[] {BixiConstant.LOCATION_FAMILY_NAME},
new String[] {match_box.getColumn()},
100000);
/** Step3** send out the query to trigger the corresponding function in Coprocessor*** */
hbaseUtil
.getHTable()
.coprocessorExec(
BixiProtocol.class,
scan.getStartRow(),
scan.getStopRow(),
new Batch.Call<BixiProtocol, String>() {
public String call(BixiProtocol instance) throws IOException {
return instance.copQueryPoint4LS2(scan, latitude, longitude);
};
},
callBack);
long e_time = System.currentTimeMillis();
long exe_time = e_time - s_time;
// TODO store the time into database
System.out.println("exe_time=>" + exe_time + ";result=>" + callBack.res);
String outStr = "q=point;m=>cop;" + ";exe_time=>" + exe_time + ";result=>" + callBack.res;
this.writeStat(outStr);
return callBack.res;
} catch (Exception e) {
e.printStackTrace();
} catch (Throwable ee) {
ee.printStackTrace();
} finally {
hbaseUtil.closeTableHandler();
this.closeStatLog();
}
return null;
}
