@Override
public void searchDB(String keyword) {
long t0 = System.nanoTime();
try {
// First mapreduce phase setup
HBaseConfiguration conf = config;
Job job;
job = new Job(conf, "MapReducePhase1");
job.setJarByClass(MapReduceHbaseDB.class);
Scan scan = new Scan();
String columns = "myColumnFamily";
scan.addColumns(columns);
scan.setCaching(10000);
// Second mapreduce phase setup
HBaseConfiguration conf2 = new HBaseConfiguration();
Job job2 = new Job(conf2, "MapReducePhase2");
job2.setJarByClass(MapReduceHbaseDB.class);
Scan scan2 = new Scan();
String columns2 = "resultF";
scan2.addColumns(columns2);
scan2.setCaching(10000);
// Execution of the first mapreduce phase
TableMapReduceUtil.initTableMapperJob(
"myTable", scan, Mapper1.class, Text.class, Text.class, job);
TableMapReduceUtil.initTableReducerJob("result", Reducer1.class, job);
job.waitForCompletion(true);
long t2 = System.nanoTime();
// Execution of the second mapreduce phase
TableMapReduceUtil.initTableMapperJob(
"result", scan2, Mapper2.class, Text.class, IntWritable.class, job2);
TableMapReduceUtil.initTableReducerJob("result2", Reducer2.class, job2);
job2.waitForCompletion(true);
long t1 = System.nanoTime();
double totalTime = (t1 - t0) / 1000000000.0;
System.out.println("Total time for the search : " + totalTime + " seconds");
double firstPhaseTime = (t2 - t0) / 1000000000.0;
System.out.println("Time for the first mapreduce phase : " + firstPhaseTime + " seconds");
double secondPhaseTime = (t1 - t2) / 1000000000.0;
System.out.println("Time for the first mapreduce phase : " + secondPhaseTime + " seconds");
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
@Test
public void shouldRunMapReduce() throws Exception {
// given
Job job = new Job(configuration, "Average Rating");
job.setJarByClass(AverageRatingMapper.class);
Scan scan = new Scan();
scan.setCaching(500);
scan.setCacheBlocks(false);
scan.addFamily(Bytes.toBytes(LoadMovieRatingData.FAMILY_NAME));
TableMapReduceUtil.initTableMapperJob(
LoadMovieRatingData.TABLE_NAME,
scan,
AverageRatingMapper.class,
Text.class,
DoubleWritable.class,
job);
job.setReducerClass(RatingExportReducer.class);
job.setNumReduceTasks(1);
FileOutputFormat.setOutputPath(
job, new Path("/tmp/mr/mySummaryFile_" + System.currentTimeMillis()));
// when
boolean succeeded = job.waitForCompletion(true);
// then
assertThat(succeeded).isTrue();
}
public Scan generateScan(
String[] rowRange, FilterList filterList, String[] family, String[] columns, int maxVersion)
throws Exception {
if (table == null) throw new Exception("No table handler");
if (cacheSize < 0) throw new Exception("should set cache size before scanning");
Scan scan = null;
try {
scan = new Scan();
scan.setCaching(this.cacheSize);
scan.setCacheBlocks(this.blockCached);
scan.setFilter(filterList);
if (maxVersion > 0) scan.setMaxVersions(maxVersion);
if (rowRange != null) {
scan.setStartRow(rowRange[0].getBytes());
if (rowRange.length == 2) scan.setStopRow(rowRange[1].getBytes());
}
if (columns != null) {
for (int i = 0; i < columns.length; i++) {
scan.addColumn(family[0].getBytes(), columns[i].getBytes());
// System.out.println(family[i]+";"+columns[i]);
}
} else {
scan.addFamily(family[0].getBytes());
}
} catch (Exception e) {
e.printStackTrace();
}
return scan;
}
/**
* Sets up the actual job.
*
* @param conf The current configuration.
* @param args The command line parameters.
* @return The newly created job.
* @throws IOException When setting up the job fails.
*/
public static Job createSubmittableJob(Configuration conf, String[] args) throws IOException {
String tableName = args[0];
Job job = new Job(conf, NAME + "_" + tableName);
job.setJarByClass(CachingRowCounter.class);
// Columns are space delimited
StringBuilder sb = new StringBuilder();
final int columnoffset = 1;
for (int i = columnoffset; i < args.length; i++) {
if (i > columnoffset) {
sb.append(" ");
}
sb.append(args[i]);
}
Scan scan = new Scan();
scan.setFilter(new FirstKeyOnlyFilter());
if (sb.length() > 0) {
for (String columnName : sb.toString().split(" ")) {
String[] fields = columnName.split(":");
if (fields.length == 1) {
scan.addFamily(Bytes.toBytes(fields[0]));
} else {
scan.addColumn(Bytes.toBytes(fields[0]), Bytes.toBytes(fields[1]));
}
}
}
scan.setCaching(100);
// Second argument is the table name.
job.setOutputFormatClass(NullOutputFormat.class);
TableMapReduceUtil.initTableMapperJob(
tableName, scan, RowCounterMapper.class, ImmutableBytesWritable.class, Result.class, job);
job.setNumReduceTasks(0);
return job;
}
public static void main(String[] args) throws Exception {
new JobConf().setSpeculativeExecution(false);
Configuration conf = new Configuration();
conf.set("es.nodes", ES_NODES);
conf.set("es.resource", ES_RESOURCE);
conf.set("es.mapping.id", HBaseTableMapper.ID_FIELD.toString());
conf.set("es.batch.size.bytes", "10mb");
conf.set("es.batch.size.entries", "10000");
conf.set("es.batch.write.refresh", "false");
Job job = new Job(conf);
job.setJarByClass(BulkIndex.class);
job.setMapperClass(HBaseTableMapper.class);
job.setNumReduceTasks(0);
job.setSpeculativeExecution(false);
job.setOutputFormatClass(BulkProcessorOutputFormat.class);
job.setMapOutputValueClass(Text.class);
Scan scan = new Scan();
scan.setCaching(1000);
scan.setCacheBlocks(false);
TableMapReduceUtil.initTableMapperJob(
BulkLoad.HBASE_TABLE_NAME,
scan,
HBaseTableMapper.class,
NullWritable.class,
MapWritable.class,
job);
job.waitForCompletion(true);
}
/**
* Performs a full scan of a catalog table.
*
* @param catalogTracker
* @param visitor Visitor invoked against each row.
* @param startrow Where to start the scan. Pass null if want to begin scan at first row.
* @param scanRoot True if we are to scan <code>-ROOT-</code> rather than <code>.META.</code>, the
* default (pass false to scan .META.)
* @throws IOException
*/
static void fullScan(
CatalogTracker catalogTracker,
final Visitor visitor,
final byte[] startrow,
final boolean scanRoot)
throws IOException {
Scan scan = new Scan();
if (startrow != null) scan.setStartRow(startrow);
if (startrow == null && !scanRoot) {
int caching =
catalogTracker
.getConnection()
.getConfiguration()
.getInt(HConstants.HBASE_META_SCANNER_CACHING, 100);
scan.setCaching(caching);
}
scan.addFamily(HConstants.CATALOG_FAMILY);
HTable metaTable = scanRoot ? getRootHTable(catalogTracker) : getMetaHTable(catalogTracker);
ResultScanner scanner = metaTable.getScanner(scan);
try {
Result data;
while ((data = scanner.next()) != null) {
if (data.isEmpty()) continue;
// Break if visit returns false.
if (!visitor.visit(data)) break;
}
} finally {
scanner.close();
metaTable.close();
}
return;
}
public static void main(String[] args) throws Exception {
Configuration con = new Configuration();
String[] otherArgs = new GenericOptionsParser(con, args).getRemainingArgs();
HBaseConfiguration conf = new HBaseConfiguration();
Job job = new Job(conf, "AverageCalc");
job.setJarByClass(AverageCalculator.class);
Scan scan = new Scan();
scan.setCaching(500);
scan.setCacheBlocks(false);
scan.addFamily(Bytes.toBytes("Post"));
FilterList li = new FilterList(FilterList.Operator.MUST_PASS_ALL);
SingleColumnValueFilter filter =
new SingleColumnValueFilter(
Bytes.toBytes("Post"),
Bytes.toBytes("PostTypeId"),
CompareOp.EQUAL,
Bytes.toBytes("1"));
li.addFilter(filter);
scan.setFilter(li);
FileOutputFormat.setOutputPath(job, new Path(otherArgs[0]));
job.setOutputKeyClass(Text.class);
TableMapReduceUtil.initTableMapperJob(
"bigd24-hbase-sample", scan, Mapper1.class, Text.class, IntWritable.class, job);
job.setReducerClass(Reducer1.class);
job.setOutputValueClass(FloatWritable.class);
System.exit(job.waitForCompletion(true) ? 0 : 1);
}
private Scan createScan(String applicationName, Range range, boolean scanBackward) {
Scan scan = new Scan();
scan.setCaching(this.scanCacheSize);
byte[] bApplicationName = Bytes.toBytes(applicationName);
byte[] traceIndexStartKey = SpanUtils.getTraceIndexRowKey(bApplicationName, range.getFrom());
byte[] traceIndexEndKey = SpanUtils.getTraceIndexRowKey(bApplicationName, range.getTo());
if (scanBackward) {
// start key is replaced by end key because key has been reversed
scan.setStartRow(traceIndexEndKey);
scan.setStopRow(traceIndexStartKey);
} else {
scan.setReversed(true);
scan.setStartRow(traceIndexStartKey);
scan.setStopRow(traceIndexEndKey);
}
scan.addFamily(HBaseTables.APPLICATION_TRACE_INDEX_CF_TRACE);
scan.setId("ApplicationTraceIndexScan");
// toString() method of Scan converts a message to json format so it is slow for the first time.
logger.trace("create scan:{}", scan);
return scan;
}
public static void htableFile() throws Exception {
Job job = new Job(conf, "ExampleSummaryToFile");
job.setJarByClass(HbaseMR.class); // class that contains mapper
Scan scan = new Scan();
scan.setCaching(500); // 1 is the default in Scan, which will be bad for
// MapReduce jobs
scan.setCacheBlocks(false); // don't set to true for MR jobs
// set other scan attrs
TableMapReduceUtil.initTableMapperJob(
"sourceTable", // input table
scan, // Scan instance to control CF and attribute selection
MyMapper.class, // mapper class
Text.class, // mapper output key
IntWritable.class, // mapper output value
job);
job.setReducerClass(MyReducer4.class); // reducer class
job.setNumReduceTasks(1); // at least one, adjust as required
FileOutputFormat.setOutputPath(new JobConf(conf), new Path("/tmp/mr/mySummaryFile")); // adjust
// directories
// as
// required
boolean b = job.waitForCompletion(true);
if (!b) {
throw new IOException("error with job!");
}
}
public static void main(String args[]) {
if (args.length == 0) {
System.out.println("JavaHBaseDistributedScan {master} {tableName}");
}
String master = args[0];
String tableName = args[1];
JavaSparkContext jsc = new JavaSparkContext(master, "JavaHBaseDistributedScan");
jsc.addJar("SparkHBase.jar");
Configuration conf = HBaseConfiguration.create();
conf.addResource(new Path("/etc/hbase/conf/core-site.xml"));
conf.addResource(new Path("/etc/hbase/conf/hbase-site.xml"));
JavaHBaseContext hbaseContext = new JavaHBaseContext(jsc, conf);
Scan scan = new Scan();
scan.setCaching(100);
JavaRDD<Tuple2<byte[], List<Tuple3<byte[], byte[], byte[]>>>> javaRdd =
hbaseContext.hbaseRDD(tableName, scan);
List<Tuple2<byte[], List<Tuple3<byte[], byte[], byte[]>>>> results = javaRdd.collect();
results.size();
}
public static void readWriteHtable() throws Exception {
Job job = new Job(conf, "ExampleReadWrite");
job.setJarByClass(HbaseMR.class); // class that contains mapper
Scan scan = new Scan();
scan.setCaching(500); // 1 is the default in Scan, which will be bad for
// MapReduce jobs
scan.setCacheBlocks(false); // don't set to true for MR jobs
// set other scan attrs
TableMapReduceUtil.initTableMapperJob(
"sourceTable", // input table
scan, // Scan instance to control CF and attribute selection
MyMapper2.class, // mapper class
null, // mapper output key
null, // mapper output value
job);
TableMapReduceUtil.initTableReducerJob(
"targetTable", // output table
null, // reducer class
job);
job.setNumReduceTasks(0);
boolean b = job.waitForCompletion(true);
if (!b) {
throw new IOException("error with job!");
}
}
/**
* Get a collection of Scans, one per region, that cover the range of the table having the given
* key prefix. Thes will be used as the map task input splits.
*/
public static List<Scan> scansThisCubeOnly(byte[] keyPrefix, byte[][] splitKeys)
throws IOException {
Scan copyScan = new Scan();
copyScan.setCaching(5000);
copyScan.setCacheBlocks(false);
// Hack: generate a key that probably comes after all this cube's keys but doesn't include any
// keys not belonging to this cube.
byte[] keyAfterCube = ArrayUtils.addAll(keyPrefix, fiftyBytesFF);
List<Scan> scans = new ArrayList<Scan>();
Scan scanUnderConstruction = new Scan(copyScan);
for (byte[] splitKey : splitKeys) {
scanUnderConstruction.setStopRow(splitKey);
// Coerce scan to only touch keys belonging to this cube
Scan truncated = truncateScan(scanUnderConstruction, keyPrefix, keyAfterCube);
if (truncated != null) {
scans.add(truncated);
}
scanUnderConstruction = new Scan(copyScan);
scanUnderConstruction.setStartRow(splitKey);
}
// There's another region from last split key to the end of the table.
Scan truncated = truncateScan(scanUnderConstruction, keyPrefix, keyAfterCube);
if (truncated != null) {
scans.add(truncated);
}
return scans;
}
public static List<Delete> GetDeleteEventsBetween(
Table VTEvent_Table, String imo_str, long first_timestamp, long last_timestamp)
throws IOException {
// scan
// 'cdb_vessel:vessel_event',{FILTER=>"(PrefixFilter('0000003162')"}
Scan GetEventsBetween = new Scan();
GetEventsBetween.setStartRow(
Bytes.toBytes(imo_str + LpadNum(Long.MAX_VALUE - last_timestamp, 19) + "0000000000"))
.setStopRow(
Bytes.toBytes(
imo_str + LpadNum(Long.MAX_VALUE - first_timestamp + 1, 19) + "9999999999"))
.addColumn(details, exittime);
GetEventsBetween.setCaching(100);
Filter ExistTimeValuefilter =
new ValueFilter(
CompareFilter.CompareOp.LESS_OR_EQUAL,
new BinaryComparator(
Bytes.toBytes(new DateTime(last_timestamp).toString(rawformatter))));
GetEventsBetween.setFilter(ExistTimeValuefilter);
ResultScanner Result_ExistingEvents = VTEvent_Table.getScanner(GetEventsBetween);
List<Delete> deletes = new ArrayList<Delete>();
for (Result res : Result_ExistingEvents) {
deletes.add(new Delete(res.getRow()));
}
Result_ExistingEvents.close();
return deletes;
}
// Get all events with exit at last location
public static Map<Integer, VesselEvent> getAllEventsStartBeforeEndAfterBeforeLocation(
Table VTEvent_Table, String IMO_str, VesselLocation location) throws IOException {
Scan getAllEventsWithExistAtLastLocation = new Scan();
getAllEventsWithExistAtLastLocation
.setStartRow(
Bytes.toBytes(
IMO_str + LpadNum(Long.MAX_VALUE - location.recordtime, 19) + "0000000000"))
.setStopRow(Bytes.toBytes(IMO_str + LpadNum(Long.MAX_VALUE, 19) + "9999999999"))
.addColumn(details, exittime);
getAllEventsWithExistAtLastLocation.setCaching(100);
Filter ExistTimeValuefilter =
new ValueFilter(
CompareFilter.CompareOp.GREATER_OR_EQUAL,
new BinaryComparator(
Bytes.toBytes(new DateTime(location.recordtime).toString(rawformatter))));
getAllEventsWithExistAtLastLocation.setFilter(ExistTimeValuefilter);
ResultScanner Result_event = VTEvent_Table.getScanner(getAllEventsWithExistAtLastLocation);
Map<Integer, VesselEvent> events = new HashMap<Integer, VesselEvent>();
for (Result res : Result_event) {
Get get = new Get(res.getRow());
get.addColumn(details, entrytime);
get.addColumn(details, entrycoordinates);
Result result = VTEvent_Table.get(get);
String rowkey = Bytes.toString(result.getRow());
String polygonid = rowkey.substring(26);
VesselEvent VE = new VesselEvent();
VE.exittime = location.recordtime;
VE.exitcoordinates = location.coordinates;
VE.destination = location.destination;
VE.polygonid = Integer.parseInt(polygonid);
for (Cell cell : result.rawCells()) {
String Qualifier = Bytes.toString(CellUtil.cloneQualifier(cell));
String Value = Bytes.toString(CellUtil.cloneValue(cell));
if (Qualifier.equals("entertime")) {
VE.entrytime = DateTime.parse(Value, rawformatter).getMillis();
} else if (Qualifier.equals("entercoordinates")) {
VE.entrycoordinates = Value;
}
}
events.put(VE.polygonid, VE);
}
Result_event.close();
return events;
}
public synchronized ResultScanner getScanner(
final TransactionState transactionState, final Scan scan) throws IOException {
if (LOG.isTraceEnabled()) LOG.trace("Enter TransactionalTable.getScanner");
if (scan.getCaching() <= 0) {
scan.setCaching(getScannerCaching());
}
Long value = (long) 0;
TransactionalScanner scanner = new TransactionalScanner(this, transactionState, scan, value);
return scanner;
}
public static Job startJob(String[] args) throws IOException {
// args[0] = hbase table name
// args[1] = zookeeper
Configuration hConf = HBaseConfiguration.create(new Configuration());
hConf.set("hbase.zookeeper.quorum", args[1]);
hConf.set("scan.table", args[0]);
hConf.set("hbase.zookeeper.property.clientPort", "2181");
Scan scan = new Scan();
// scan.setFilter(rowColBloomFilter());
Job job = new Job(hConf);
job.setJobName("BSBM-Q11-RepartitionJoin");
job.setJarByClass(RepartitionJoinQ11.class);
// Change caching to speed up the scan
scan.setCaching(500);
scan.setMaxVersions(200);
scan.setCacheBlocks(false);
// Mapper settings
TableMapReduceUtil.initTableMapperJob(
args[0], // input HBase table name
scan, // Scan instance to control CF and attribute selection
RepartitionMapper.class, // mapper
CompositeKeyWritable.class, // mapper output key
KeyValueArrayWritable.class, // mapper output value
job);
// Repartition settings
job.setPartitionerClass(CompositePartitioner.class);
job.setSortComparatorClass(CompositeSortComparator.class);
job.setGroupingComparatorClass(CompositeGroupingComparator.class);
// Reducer settings
job.setReducerClass(SharedServices.RepartitionJoin_Reducer.class); // reducer class
job.setNumReduceTasks(1); // at least one, adjust as required
FileOutputFormat.setOutputPath(job, new Path("output/BSBMQ11"));
try {
System.exit(job.waitForCompletion(true) ? 0 : 1);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
return job;
}
public static void main(String[] args) throws IOException, SolrServerException {
final Configuration conf;
HttpSolrServer solrServer = new HttpSolrServer("http://c1master:8983/solr");
conf = HBaseConfiguration.create();
// Define Hbase Table Name
HTable table = new HTable(conf, "test_global_shop");
Scan scan = new Scan();
// Define Hbase Column Family
scan.addFamily(Bytes.toBytes("shop"));
scan.setCaching(1000);
scan.setCacheBlocks(false);
ResultScanner ss = table.getScanner(scan);
System.out.println("start Storing...");
int i = 0;
try {
for (Result r : ss) {
SolrInputDocument solrDoc = new SolrInputDocument();
solrDoc.addField("key", new String(r.getRow()));
for (KeyValue kv : r.raw()) {
String fieldName = new String(kv.getQualifier());
String fieldValue = new String(kv.getValue());
if (fieldName.equalsIgnoreCase("address")
|| fieldName.equalsIgnoreCase("category")
|| fieldName.equalsIgnoreCase("name")
|| fieldName.equalsIgnoreCase("province")
|| fieldName.equalsIgnoreCase("tel")) {
solrDoc.addField(fieldName, fieldValue);
}
}
solrServer.add(solrDoc);
solrServer.commit(true, true, true);
i = i + 1;
System.out.println("Already Succcess " + i + " number data");
}
ss.close();
table.close();
System.out.println("done !");
} catch (IOException e) {
} finally {
ss.close();
table.close();
System.out.println("error !");
}
}
public static void updateExistingEventsToEndAtLastLocation(
Table VTEvent_Table, long imo, VesselLocation lastlocation) throws IOException {
// update existing events that started BEFORE the first new location and end after the first
// to end as the last location
// Find existing events that started BEFORE the first new location and end after the first
Scan getEventStartedBeforeAndEndAfter = new Scan();
;
getEventStartedBeforeAndEndAfter
.setStartRow(
Bytes.toBytes(
LpadNum(imo, 7)
+ LpadNum(Long.MAX_VALUE - lastlocation.recordtime, 19)
+ "0000000000"))
.setStopRow(Bytes.toBytes(LpadNum(imo, 7) + LpadNum(Long.MAX_VALUE, 19) + "9999999999"))
.addColumn(details, exittime);
getEventStartedBeforeAndEndAfter.setCaching(100);
Filter ExistTimeValuefilter =
new ValueFilter(
CompareFilter.CompareOp.GREATER,
new BinaryComparator(
Bytes.toBytes(new DateTime(lastlocation.recordtime).toString(rawformatter))));
getEventStartedBeforeAndEndAfter.setFilter(ExistTimeValuefilter);
ResultScanner Result_eventcross = VTEvent_Table.getScanner(getEventStartedBeforeAndEndAfter);
List<Put> puts = new ArrayList<Put>();
for (Result res : Result_eventcross) {
// vessel event table
// rowkey: imo(7)+timestamp(19 desc)+polygonid(8)
// qualifier:entrytime,entrycoordinates,exittime,exitcoordinates,destination
byte[] rowkey = res.getRow();
Put updateevent = new Put(rowkey);
updateevent.addColumn(
details,
exittime,
Bytes.toBytes(new DateTime(lastlocation.recordtime).toString(rawformatter)));
updateevent.addColumn(details, coordinates, Bytes.toBytes(lastlocation.coordinates));
updateevent.addColumn(details, destination, Bytes.toBytes(lastlocation.destination));
puts.add(updateevent);
}
Result_eventcross.close();
VTEvent_Table.put(puts);
}
private static void createMapReduceJob(
String tableNameToIndex, Configuration conf, int caching, int versions)
throws IOException, InterruptedException, ClassNotFoundException {
// Set the details to TableInputFormat
Scan s = new Scan();
s.setCaching(caching);
s.setMaxVersions(versions);
conf.set(TableInputFormat.INPUT_TABLE, tableNameToIndex);
Set<Entry<String, List<String>>> entrySet = cfs.entrySet();
for (Entry<String, List<String>> entry : entrySet) {
List<String> quals = entry.getValue();
addColumn(quals, Bytes.toBytes(entry.getKey()), s);
}
Job job = new Job(conf, "CreateIndex");
String hfileOutPath = conf.get(BULK_OUTPUT_CONF_KEY);
TableMapReduceUtil.initTableMapperJob(
tableNameToIndex, // input table
s, // Scan instance to control CF and attribute selection
IndexCreationMapper.class, // mapper class
ImmutableBytesWritable.class, // mapper output key
Put.class, // mapper output value
job);
TableMapReduceUtil.initTableReducerJob(
IndexUtils.getIndexTableName(tableNameToIndex), // output
// table
null, // reducer class
job);
if (hfileOutPath != null) {
HTable table = new HTable(conf, tableNameToIndex);
job.setReducerClass(KeyValueSortReducer.class);
Path outputDir = new Path(hfileOutPath);
FileOutputFormat.setOutputPath(job, outputDir);
HFileOutputFormat.configureIncrementalLoad(job, table);
} else {
job.setNumReduceTasks(0);
}
TableMapReduceUtil.addDependencyJars(
job.getConfiguration(), com.google.common.base.Preconditions.class);
job.waitForCompletion(true);
assert job.isComplete() == true;
}
@SuppressWarnings({"rawtypes", "unchecked"})
public void Read() throws IOException {
List list = new ArrayList();
Scan scan = new Scan();
scan.setBatch(0);
scan.setCaching(10000);
scan.setMaxVersions();
scan.addColumn(Bytes.toBytes("cf1"), Bytes.toBytes("total"));
ResultScanner rsScanner = table.getScanner(scan);
for (Result rs : rsScanner) {
String date = Bytes.toString(rs.getRow());
String total = Bytes.toString(rs.getValue(Bytes.toBytes("cf1"), Bytes.toBytes("total")));
list.add(date + "\t" + total);
}
for (int i = 0; i < 7; i++)
System.out.println((String) list.get(i) + "\t" + (String) list.get(i + 7));
}
private void loadIPs() {
dns = new HashMap(100000000); // ���貢��
unknownHosts = new HashMap(1000000);
querying = new HashMap(100000);
try {
int statsCommit = 500000;
HConnection connection = HConnectionManager.createConnection(HBaseConfiguration.create());
HTableInterface fetchFailTable = connection.getTable("fetchFail");
Scan scan = new Scan();
scan.setCaching(statsCommit);
List<Filter> filters = new ArrayList<Filter>();
Filter filter = new ColumnPrefixFilter(Bytes.toBytes("ip"));
filters.add(filter);
FilterList filterList = new FilterList(filters);
scan.setFilter(filterList);
ResultScanner rs = fetchFailTable.getScanner(scan);
long cnt = 0;
for (Result r : rs) {
NavigableMap<byte[], byte[]> map = r.getFamilyMap(Bytes.toBytes("cf"));
String ip = Bytes.toString(map.get(Bytes.toBytes("ip")));
String host = Bytes.toString(r.getRow()).split("��")[0];
if (host != null && ip != null) {
dns.put(host, ip);
}
if (++cnt % statsCommit == 0) {
LOG.info("loadIPs url=" + Bytes.toString(r.getRow()) + " cnt=" + cnt);
}
}
rs.close();
fetchFailTable.close();
LOG.info("load hostip cache=" + dns.size());
connection.close();
} catch (Exception e) {
e.printStackTrace();
} finally {
//
}
}
// MapReduce Stage-1 Job
public static Job startJob_Stage1(String[] args, Configuration hConf) throws IOException {
// args[0] = hbase table name
// args[1] = zookeeper
/*
* MapReduce Stage-1 Job
* Retrieve a list of subjects and their attributes
*/
Scan scan1 = new Scan();
Job job1 = new Job(hConf);
job1.setJobName("BSBM-Q8-RepartitionJoin");
job1.setJarByClass(RepartitionJoinQ8.class);
// Change caching and number of time stamps to speed up the scan
scan1.setCaching(500);
scan1.setMaxVersions(200);
scan1.setCacheBlocks(false);
// Mapper settings
TableMapReduceUtil.initTableMapperJob(
args[0], // input HBase table name
scan1, // Scan instance to control CF and attribute selection
RepartitionMapper.class, // mapper class
CompositeKeyWritable.class, // mapper output key
KeyValueArrayWritable.class, // mapper output value
job1);
// Reducer settings
job1.setReducerClass(RepartitionReducer.class);
job1.setOutputFormatClass(TextOutputFormat.class);
// job1.setNumReduceTasks(1); // Uncomment this if running into problems on 2+ node cluster
FileOutputFormat.setOutputPath(job1, new Path("output/BSBMQ8"));
try {
job1.waitForCompletion(true);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
return job1;
}
public static List<VesselLocation> getLocationsBetween(
Table VTLocation_Table, String imo_str, long first_timestamp, long last_timestamp)
throws IOException {
// scan
// 'cdb_vessel:vessel_location',{FILTER=>"(PrefixFilter('0000003162')"}
Scan GetExistingLocations = new Scan();
GetExistingLocations.setStartRow(
Bytes.toBytes(imo_str + LpadNum(Long.MAX_VALUE - last_timestamp, 19)))
.setStopRow(Bytes.toBytes(imo_str + LpadNum(Long.MAX_VALUE - first_timestamp + 1, 19)));
GetExistingLocations.setCaching(1000);
ResultScanner Result_ExistingLocations = VTLocation_Table.getScanner(GetExistingLocations);
List<VesselLocation> result = new ArrayList<VesselLocation>();
for (Result res : Result_ExistingLocations) {
VesselLocation VL = new VesselLocation();
for (Cell cell : res.rawCells()) {
String Qualifier = Bytes.toString(CellUtil.cloneQualifier(cell));
String Value = Bytes.toString(CellUtil.cloneValue(cell));
if (Qualifier.equals("coordinates")) {
VL.coordinates = Value;
} else if (Qualifier.equals("speed")) {
VL.speed = Value;
} else if (Qualifier.equals("destination")) {
VL.destination = Value;
} else if (Qualifier.equals("timestamp")) {
VL.recordtime = DateTime.parse(Value, rawformatter).getMillis();
} else if (Qualifier.equals("previouslocation")) {
VL.previouslocation = Value;
} else if (Qualifier.equals("nextlocation")) {
VL.nextlocation = Value;
}
}
result.add(VL);
}
Result_ExistingLocations.close();
return result;
}
public static void scanNum(String tableStr) {
try {
Configuration conf = HBaseConfiguration.create();
Scan scan = new Scan();
scan.setCaching(5000);
Filter f = new FirstKeyOnlyFilter();
scan.setFilter(f);
HTable htable = new HTable(conf, Bytes.toBytes(tableStr));
ResultScanner scanner = htable.getScanner(scan);
int count = 0;
for (Result scannerRst : scanner) {
count++;
}
System.out.println(tableStr + ":" + count);
scanner.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Deletes the specified table with all its columns. ATTENTION: Invoking this method will delete
* the table if it exists and therefore causes data loss.
*/
@Override
public void clearStorage() throws StorageException {
HBaseAdmin adm = getAdminInterface();
try { // first of all, check if table exists, if not - we are done
if (!adm.tableExists(tableName)) {
logger.debug("clearStorage() called before table {} was created, skipping.", tableName);
return;
}
} catch (IOException e) {
throw new TemporaryStorageException(e);
}
HTable table = null;
try {
table = new HTable(hconf, tableName);
Scan scan = new Scan();
scan.setBatch(100);
scan.setCacheBlocks(false);
scan.setCaching(2000);
ResultScanner scanner = null;
try {
scanner = table.getScanner(scan);
for (Result res : scanner) {
table.delete(new Delete(res.getRow()));
}
} finally {
IOUtils.closeQuietly(scanner);
}
} catch (IOException e) {
throw new TemporaryStorageException(e);
} finally {
IOUtils.closeQuietly(table);
}
}
public static void readHtable() throws Exception {
Job job = new Job(conf, "ExampleRead");
job.setJarByClass(HbaseMR.class);
Scan scan = new Scan();
scan.setCaching(500); // 1 is the default in Scan, which will be bad for
// MapReduce jobs
scan.setCacheBlocks(false); // don't set to true for MR jobs
TableMapReduceUtil.initTableMapperJob(
"", // input HBase table name
scan, // Scan instance to control CF and attribute selection
MyMapper.class, // mapper
null, // mapper output key
null, // mapper output value
job);
job.setOutputFormatClass(NullOutputFormat.class); // because we aren't
// emitting anything
// from mapper
boolean b = job.waitForCompletion(true);
if (!b) {
throw new IOException("error with job!");
}
}
@SuppressWarnings({"resource", "rawtypes", "unchecked"})
public static void main(String[] args) throws IOException {
Configuration config = HBaseConfiguration.create();
config.set("hbase.master", "192.168.32.128:60000");
config.set("hbase.zookeeper.property.clientPort", "2181");
config.set("hbase.zookeeper.quorum", "192.168.32.128");
HTable table = new HTable(config, Bytes.toBytes("weibo"));
List list = new ArrayList();
Scan scan = new Scan();
scan.setBatch(0);
scan.setCaching(10000);
scan.setMaxVersions();
scan.addColumn(Bytes.toBytes("cf1"), Bytes.toBytes("total"));
ResultScanner rsScanner = table.getScanner(scan);
for (Result rs : rsScanner) {
String date = Bytes.toString(rs.getRow());
String total = Bytes.toString(rs.getValue(Bytes.toBytes("cf1"), Bytes.toBytes("total")));
list.add(date + "\t" + total);
}
for (int i = 0; i < 7; i++)
System.out.println((String) list.get(i) + "\t" + (String) list.get(i + 7));
}
@Test
public void shouldRunMapReduce() throws Exception {
// given
Configuration configuration = HBaseConfiguration.create();
TableFactory.recreateTable(
configuration, Bytes.toString(UsersDao.TABLE_NAME), Bytes.toString(UsersDao.FAMILY_NAME));
UserDataFactory.insertTestData();
// map reduce
Job job = new Job(configuration, "Count Users");
job.setJarByClass(CountUsersMapper.class);
Scan scan = new Scan();
scan.setCaching(500); // 1 is the default in Scan, which will be bad for MapReduce jobs
scan.setCacheBlocks(false); // don't set to true for MR jobs
scan.addColumn(UsersDao.FAMILY_NAME, UsersDao.FORENAME_COL);
// mapper
TableMapReduceUtil.initTableMapperJob(
Bytes.toString(UsersDao.TABLE_NAME),
scan,
CountUsersMapper.class,
ImmutableBytesWritable.class,
Result.class,
job);
job.setOutputFormatClass(NullOutputFormat.class);
job.setNumReduceTasks(0);
// when
boolean succeeded = job.waitForCompletion(true);
// then
assertThat(succeeded).isTrue();
assertThat(job.getCounters().findCounter(CountUsersMapper.Counters.USER_COUNT).getValue())
.isGreaterThan(99);
}
/**
* It should be noticed that the stop row in scan is not included as default
*
* @param rowRange
* @param filterList
* @param family
* @param columns
* @param maxVersion
* @return
* @throws Exception
*/
public ResultScanner getResultSet(
String[] rowRange, FilterList filterList, String[] family, String[] columns, int maxVersion)
throws Exception {
if (table == null) throw new Exception("No table handler");
if (cacheSize < 0) throw new Exception("should set cache size before scanning");
Scan scan = null;
ResultScanner rscanner = null;
try {
scan = new Scan();
scan.setCaching(this.cacheSize);
scan.setCacheBlocks(blockCached);
scan.setFilter(filterList);
if (maxVersion > 0) scan.setMaxVersions(maxVersion);
// scan exclude the stop row directly, so have to make a little difference of the stop row
if (rowRange != null) {
scan.setStartRow(rowRange[0].getBytes());
if (rowRange.length == 2 && rowRange[1] != null) scan.setStopRow((rowRange[1]).getBytes());
}
if (columns != null) {
for (int i = 0; i < columns.length; i++) {
scan.addColumn(family[0].getBytes(), columns[i].getBytes());
}
}
rscanner = this.table.getScanner(scan);
} catch (Exception e) {
e.printStackTrace();
}
return rscanner;
}
@Override
protected StateScanner scanStates(byte[] startRow, byte[] stopRow) throws IOException {
Scan scan = new Scan(startRow, stopRow);
scan.setMaxVersions(1);
scan.addColumn(QueueEntryRow.COLUMN_FAMILY, stateColumnName);
scan.setCaching(MAX_SCAN_ROWS);
// TODO: Add filter for getting committed processed rows only. Need to refactor
// HBaseQueue2Consumer to extract that.
final ResultScanner scanner =
DistributedScanner.create(hTable, scan, keyDistributor, scanExecutor);
return new StateScanner() {
private Result result;
@Override
public boolean nextStateRow() throws IOException {
result = scanner.next();
return result != null;
}
@Override
public byte[] getRow() {
return keyDistributor.getOriginalKey(result.getRow());
}
@Override
public byte[] getState() {
return result.value();
}
@Override
public void close() throws IOException {
scanner.close();
}
};
}