/*
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.accumulo.examples.simple.client;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map.Entry;
import java.util.Random;
import java.util.Set;
import org.apache.accumulo.core.cli.BatchWriterOpts;
import org.apache.accumulo.core.cli.ClientOnRequiredTable;
import org.apache.accumulo.core.client.AccumuloException;
import org.apache.accumulo.core.client.AccumuloSecurityException;
import org.apache.accumulo.core.client.BatchWriter;
import org.apache.accumulo.core.client.Connector;
import org.apache.accumulo.core.client.MutationsRejectedException;
import org.apache.accumulo.core.client.TableNotFoundException;
import org.apache.accumulo.core.client.security.SecurityErrorCode;
import org.apache.accumulo.core.data.KeyExtent;
import org.apache.accumulo.core.data.Mutation;
import org.apache.accumulo.core.data.Value;
import org.apache.accumulo.core.security.ColumnVisibility;
import org.apache.hadoop.io.Text;
import com.beust.jcommander.Parameter;
/**
* Simple example for writing random data to Accumulo. See docs/examples/README.batch for instructions.
*
* The rows of the entries will be randomly generated numbers between a specified min and max (prefixed by "row_"). The column families will be "foo" and column
* qualifiers will be "1". The values will be random byte arrays of a specified size.
*/
public class RandomBatchWriter {
/**
* Creates a random byte array of specified size using the specified seed.
*
* @param rowid
* the seed to use for the random number generator
* @param dataSize
* the size of the array
* @return a random byte array
*/
public static byte[] createValue(long rowid, int dataSize) {
Random r = new Random(rowid);
byte value[] = new byte[dataSize];
r.nextBytes(value);
// transform to printable chars
for (int j = 0; j < value.length; j++) {
value[j] = (byte) (((0xff & value[j]) % 92) + ' ');
}
return value;
}
/**
* Creates a mutation on a specified row with column family "foo", column qualifier "1", specified visibility, and a random value of specified size.
*
* @param rowid
* the row of the mutation
* @param dataSize
* the size of the random value
* @param visibility
* the visibility of the entry to insert
* @return a mutation
*/
public static Mutation createMutation(long rowid, int dataSize, ColumnVisibility visibility) {
Text row = new Text(String.format("row_%010d", rowid));
Mutation m = new Mutation(row);
// create a random value that is a function of the
// row id for verification purposes
byte value[] = createValue(rowid, dataSize);
m.put(new Text("foo"), new Text("1"), visibility, new Value(value));
return m;
}
static class Opts extends ClientOnRequiredTable {
@Parameter(names = "--num", required = true)
int num = 0;
@Parameter(names = "--min")
long min = 0;
@Parameter(names = "--max")
long max = Long.MAX_VALUE;
@Parameter(names = "--size", required = true, description = "size of the value to write")
int size = 0;
@Parameter(names = "--vis", converter = VisibilityConverter.class)
ColumnVisibility visiblity = new ColumnVisibility("");
@Parameter(names = "--seed", description = "seed for pseudo-random number generator")
Long seed = null;
}
public static long abs(long l) {
l = Math.abs(l); // abs(Long.MIN_VALUE) == Long.MIN_VALUE...
if (l < 0)
return 0;
return l;
}
/**
* Writes a specified number of entries to Accumulo using a {@link BatchWriter}.
*/
public static void main(String[] args) throws AccumuloException, AccumuloSecurityException, TableNotFoundException {
Opts opts = new Opts();
BatchWriterOpts bwOpts = new BatchWriterOpts();
opts.parseArgs(RandomBatchWriter.class.getName(), args, bwOpts);
if ((opts.max - opts.min) < 1L * opts.num) { // right-side multiplied by 1L to convert to long in a way that doesn't trigger FindBugs
System.err.println(String.format("You must specify a min and a max that allow for at least num possible values. "
+ "For example, you requested %d rows, but a min of %d and a max of %d (exclusive), which only allows for %d rows.", opts.num, opts.min, opts.max,
(opts.max - opts.min)));
System.exit(1);
}
Random r;
if (opts.seed == null)
r = new Random();
else {
r = new Random(opts.seed);
}
Connector connector = opts.getConnector();
BatchWriter bw = connector.createBatchWriter(opts.tableName, bwOpts.getBatchWriterConfig());
// reuse the ColumnVisibility object to improve performance
ColumnVisibility cv = opts.visiblity;
// Generate num unique row ids in the given range
HashSet<Long> rowids = new HashSet<Long>(opts.num);
while (rowids.size() < opts.num) {
rowids.add((abs(r.nextLong()) % (opts.max - opts.min)) + opts.min);
}
for (long rowid : rowids) {
Mutation m = createMutation(rowid, opts.size, cv);
bw.addMutation(m);
}
try {
bw.close();
} catch (MutationsRejectedException e) {
if (e.getAuthorizationFailuresMap().size() > 0) {
HashMap<String,Set<SecurityErrorCode>> tables = new HashMap<String,Set<SecurityErrorCode>>();
for (Entry<KeyExtent,Set<SecurityErrorCode>> ke : e.getAuthorizationFailuresMap().entrySet()) {
Set<SecurityErrorCode> secCodes = tables.get(ke.getKey().getTableId().toString());
if (secCodes == null) {
secCodes = new HashSet<SecurityErrorCode>();
tables.put(ke.getKey().getTableId().toString(), secCodes);
}
secCodes.addAll(ke.getValue());
}
System.err.println("ERROR : Not authorized to write to tables : " + tables);
}
if (e.getConstraintViolationSummaries().size() > 0) {
System.err.println("ERROR : Constraint violations occurred : " + e.getConstraintViolationSummaries());
}
System.exit(1);
}
}
}