/**
* 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.hadoop.hbase.regionserver.compactions;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.math.random.GaussianRandomGenerator;
import org.apache.commons.math.random.MersenneTwister;
import org.apache.hadoop.hbase.regionserver.StoreFile;
class GaussianFileListGenerator extends StoreFileListGenerator {
GaussianFileListGenerator() {
super(GaussianFileListGenerator.class);
}
@Override
public Iterator<List<StoreFile>> iterator() {
return new Iterator<List<StoreFile>>() {
private GaussianRandomGenerator gen =
new GaussianRandomGenerator(new MersenneTwister(random.nextInt()));
private int count = 0;
@Override
public boolean hasNext() {
return count < MAX_FILE_GEN_ITERS;
}
@Override
public List<StoreFile> next() {
count += 1;
ArrayList<StoreFile> files = new ArrayList<StoreFile>(NUM_FILES_GEN);
for (int i = 0; i < NUM_FILES_GEN; i++) {
files.add(createMockStoreFile(
(int) Math.ceil(Math.max(0, gen.nextNormalizedDouble() * 32 + 32)))
);
}
return files;
}
@Override
public void remove() {
}
};
}
}