/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
* <p/>
* http://www.apache.org/licenses/LICENSE-2.0
* <p/>
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.bigtop.itest.hbase.system;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Map.Entry;
import java.util.NavigableMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
import org.apache.hadoop.hbase.filter.SingleColumnValueFilter;
import org.apache.hadoop.hbase.util.Bytes;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.Multimap;
/**
* This program scans a table a configurable number of times. Uses
* the table record reader.
*/
public class Scanner {
public static final Log LOG = LogFactory.getLog(Scanner.class);
public static int doScan(HTable table, int val) throws IOException,
InterruptedException {
Scan s = new Scan();
byte[] start = {};
byte[] stop = {};
byte[] value = Bytes.toBytes(String.format("%010d", val));
s.setStartRow(start);
s.setStopRow(stop);
SingleColumnValueFilter filter = new SingleColumnValueFilter(
Bytes.toBytes("f1"), Bytes.toBytes("qual"), CompareOp.EQUAL, value);
s.setFilter(filter);
// Keep track of gathered elements.
Multimap<String, String> mm = ArrayListMultimap.create();
// Counts
int cnt = 0;
long i = 0;
ResultScanner rs = table.getScanner(s);
for (Result r : rs) {
if (r.getRow() == null) {
continue;
}
NavigableMap<byte[], NavigableMap<byte[], NavigableMap<Long,
byte[]>>> columnFamilyMap = r.getMap();
// Output time to show if flush related.
String k = Bytes.toStringBinary(r.getRow());
if (mm.get(k).size() >= 1) {
System.out.println("Duplicate rowkey " + k);
LOG.error("Duplicate rowkey " + k);
}
mm.put(Bytes.toStringBinary(r.getRow()), i + ": " + r);
cnt++;
i++;
}
System.out.println("scan items counted: " + cnt + " for scan " +
s.toString() + " with filter f1:qual == " + Bytes.toString(value));
// Print out dupes.
int dupes = 0;
for (Entry<String, Collection<String>> e : mm.asMap().entrySet()) {
if (e.getValue().size() > 1) {
dupes++;
System.out.print("Row " + e.getKey() + " had time stamps: ");
String[] tss = e.getValue().toArray(new String[0]);
System.out.println(Arrays.toString(tss));
}
}
return dupes;
}
public static void main(String argv[]) throws IOException {
if (argv.length < 2) {
System.err.println("usage: " + Scanner.class.getSimpleName() +
" <table> <value>");
System.err.println(" <value>: a numeric value [0,500)");
System.exit(1);
}
String tableName = argv[0];
int val = Integer.parseInt(argv[1]);
int loops = 1;
for (int i = 1; i < argv.length; i++) {
if (argv[i].equals("-l")) {
i++;
loops = Integer.parseInt(argv[i]);
}
}
HTable table = new HTable(tableName);
int exitVal = 0;
for (int i = 0; i < loops; i++) {
try {
exitVal = doScan(table, val);
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
if (exitVal != 0) {
break;
}
}
System.exit(exitVal);
}
}