本文整理汇总了Java中org.apache.flink.runtime.operators.hash.MutableHashTable类的典型用法代码示例。如果您正苦于以下问题：Java MutableHashTable类的具体用法？Java MutableHashTable怎么用？Java MutableHashTable使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
MutableHashTable类属于org.apache.flink.runtime.operators.hash包，在下文中一共展示了MutableHashTable类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: addValues
import org.apache.flink.runtime.operators.hash.MutableHashTable; //导入依赖的package包/类
/**
* Find for each value the right bucket on the deepest level and increase
* its count
*/
@SuppressWarnings("unchecked")
private void addValues() {
while (importIterator.hasNext()) {
int nextValue = importIterator.next();
HashMap<Integer, Object> mapForCurrentLevel = rootMap;
for (int i = 0; i < maxLevel - 1; i++) {
int hashValue = MutableHashTable.hash(nextValue, i);
int bucket = rangeCalculators[i].getBucket(hashValue);
Object nextObject = mapForCurrentLevel.get(bucket);
if (nextObject == null) {
HashMap<Integer, Object> mapForNextLevel = new HashMap<Integer, Object>();
mapForCurrentLevel.put(bucket, mapForNextLevel);
mapForCurrentLevel = mapForNextLevel;
} else {
mapForCurrentLevel = (HashMap<Integer, Object>) nextObject;
}
}
int lastHashValue = MutableHashTable.hash(nextValue, maxLevel - 1);
int deepestBucketNr = rangeCalculators[maxLevel - 1]
.getBucket(lastHashValue);
Object countOnDeepestLevel = mapForCurrentLevel
.get(deepestBucketNr);
if (countOnDeepestLevel == null) {
mapForCurrentLevel.put(deepestBucketNr, 1);
} else {
mapForCurrentLevel.put(deepestBucketNr,
((Integer) countOnDeepestLevel) + 1);
}
}
}
示例2: testMutableHashMapPerformance
import org.apache.flink.runtime.operators.hash.MutableHashTable; //导入依赖的package包/类
@Test
public void testMutableHashMapPerformance() {
try {
final int NUM_MEM_PAGES = SIZE * NUM_PAIRS / PAGE_SIZE;
MutableObjectIterator<IntPair> buildInput = new UniformIntPairGenerator(NUM_PAIRS, 1, false);
MutableObjectIterator<IntPair> probeInput = new UniformIntPairGenerator(0, 1, false);
MutableObjectIterator<IntPair> probeTester = new UniformIntPairGenerator(NUM_PAIRS, 1, false);
MutableObjectIterator<IntPair> updater = new UniformIntPairGenerator(NUM_PAIRS, 1, false);
MutableObjectIterator<IntPair> updateTester = new UniformIntPairGenerator(NUM_PAIRS, 1, false);
long start = 0L;
long end = 0L;
long first = System.currentTimeMillis();
System.out.println("Creating and filling MutableHashMap...");
start = System.currentTimeMillis();
MutableHashTable<IntPair, IntPair> table = new MutableHashTable<IntPair, IntPair>(serializer, serializer, comparator, comparator, pairComparator, getMemory(NUM_MEM_PAGES, PAGE_SIZE), ioManager);
table.open(buildInput, probeInput);
end = System.currentTimeMillis();
System.out.println("HashMap ready. Time: " + (end-start) + " ms");
System.out.println("Starting first probing run...");
start = System.currentTimeMillis();
IntPair compare = new IntPair();
HashBucketIterator<IntPair, IntPair> iter;
IntPair target = new IntPair();
while(probeTester.next(compare) != null) {
iter = table.getMatchesFor(compare);
iter.next(target);
assertEquals(target.getKey(), compare.getKey());
assertEquals(target.getValue(), compare.getValue());
assertTrue(iter.next(target) == null);
}
end = System.currentTimeMillis();
System.out.println("Probing done. Time: " + (end-start) + " ms");
System.out.println("Starting update...");
start = System.currentTimeMillis();
while(updater.next(compare) != null) {
compare.setValue(compare.getValue()*-1);
iter = table.getMatchesFor(compare);
iter.next(target);
iter.writeBack(compare);
//assertFalse(iter.next(target));
}
end = System.currentTimeMillis();
System.out.println("Update done. Time: " + (end-start) + " ms");
System.out.println("Starting second probing run...");
start = System.currentTimeMillis();
while(updateTester.next(compare) != null) {
compare.setValue(compare.getValue()*-1);
iter = table.getMatchesFor(compare);
iter.next(target);
assertEquals(target.getKey(), compare.getKey());
assertEquals(target.getValue(), compare.getValue());
assertTrue(iter.next(target) == null);
}
end = System.currentTimeMillis();
System.out.println("Probing done. Time: " + (end-start) + " ms");
table.close();
end = System.currentTimeMillis();
System.out.println("Overall time: " + (end-first) + " ms");
assertEquals("Memory lost", NUM_MEM_PAGES, table.getFreedMemory().size());
}
catch (Exception e) {
e.printStackTrace();
fail("Error: " + e.getMessage());
}
}