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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.atomic.LongAdder; |
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import java.util.concurrent.ConcurrentHashMap; |
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public class ConcurrentHashMap8Test extends JSR166TestCase { |
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assertFalse(map.containsKey(one)); |
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} |
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< |
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< |
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static final int SIZE = 10000; |
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static ConcurrentHashMap<Long, Long> longMap; |
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|
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static ConcurrentHashMap<Long, Long> longMap() { |
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if (longMap == null) { |
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longMap = new ConcurrentHashMap<Long, Long>(SIZE); |
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for (int i = 0; i < SIZE; ++i) |
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longMap.put(Long.valueOf(i), Long.valueOf(2 *i)); |
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} |
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return longMap; |
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} |
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|
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/** |
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* forEachKeySequentially, forEachValueSequentially, |
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* forEachEntrySequentially, forEachSequentially, |
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* forEachKeyInParallel, forEachValueInParallel, |
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* forEachEntryInParallel, forEachInParallel traverse all keys, |
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* values, entries, or mappings accordingly |
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*/ |
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public void testForEach() { |
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LongAdder adder = new LongAdder(); |
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ConcurrentHashMap<Long, Long> m = longMap(); |
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m.forEachKeySequentially((Long x) -> adder.add(x.longValue())); |
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assertEquals(adder.sum(), SIZE * (SIZE - 1) / 2); |
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adder.reset(); |
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m.forEachValueSequentially((Long x) -> adder.add(x.longValue())); |
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assertEquals(adder.sum(), SIZE * (SIZE - 1)); |
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adder.reset(); |
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m.forEachSequentially((Long x, Long y) -> adder.add(x.longValue() + y.longValue())); |
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assertEquals(adder.sum(), 3 * SIZE * (SIZE - 1) / 2); |
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adder.reset(); |
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m.forEachEntrySequentially((Map.Entry<Long,Long> e) -> adder.add(e.getKey().longValue() + e.getValue().longValue())); |
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assertEquals(adder.sum(), 3 * SIZE * (SIZE - 1) / 2); |
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adder.reset(); |
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m.forEachKeyInParallel((Long x) -> adder.add(x.longValue())); |
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assertEquals(adder.sum(), SIZE * (SIZE - 1) / 2); |
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adder.reset(); |
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m.forEachValueInParallel((Long x) -> adder.add(x.longValue())); |
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assertEquals(adder.sum(), SIZE * (SIZE - 1)); |
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adder.reset(); |
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m.forEachInParallel((Long x, Long y) -> adder.add(x.longValue() + y.longValue())); |
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assertEquals(adder.sum(), 3 * SIZE * (SIZE - 1) / 2); |
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adder.reset(); |
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m.forEachEntryInParallel((Map.Entry<Long,Long> e) -> adder.add(e.getKey().longValue() + e.getValue().longValue())); |
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assertEquals(adder.sum(), 3 * SIZE * (SIZE - 1) / 2); |
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} |
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|
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/** |
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* Mapped forEachKeySequentially, forEachValueSequentially, |
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* forEachEntrySequentially, forEachSequentially, |
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* forEachKeyInParallel, forEachValueInParallel, |
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* forEachEntryInParallel, forEachInParallel traverse the given |
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* transformations of all keys, values, entries, or mappings |
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* accordingly |
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*/ |
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public void testMappedForEach() { |
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LongAdder adder = new LongAdder(); |
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ConcurrentHashMap<Long, Long> m = longMap(); |
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m.forEachKeySequentially((Long x) -> Long.valueOf(4 * x.longValue()), |
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(Long x) -> adder.add(x.longValue())); |
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assertEquals(adder.sum(), 4 * SIZE * (SIZE - 1) / 2); |
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adder.reset(); |
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m.forEachValueSequentially((Long x) -> Long.valueOf(4 * x.longValue()), |
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(Long x) -> adder.add(x.longValue())); |
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assertEquals(adder.sum(), 4 * SIZE * (SIZE - 1)); |
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adder.reset(); |
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m.forEachSequentially((Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue()), |
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(Long x) -> adder.add(x.longValue())); |
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assertEquals(adder.sum(), 3 * SIZE * (SIZE - 1) / 2); |
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adder.reset(); |
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m.forEachEntrySequentially((Map.Entry<Long,Long> e) -> Long.valueOf(e.getKey().longValue() + e.getValue().longValue()), |
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(Long x) -> adder.add(x.longValue())); |
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assertEquals(adder.sum(), 3 * SIZE * (SIZE - 1) / 2); |
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adder.reset(); |
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m.forEachKeyInParallel((Long x) -> Long.valueOf(4 * x.longValue()), |
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(Long x) -> adder.add(x.longValue())); |
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assertEquals(adder.sum(), 4 * SIZE * (SIZE - 1) / 2); |
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adder.reset(); |
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m.forEachValueInParallel((Long x) -> Long.valueOf(4 * x.longValue()), |
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(Long x) -> adder.add(x.longValue())); |
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assertEquals(adder.sum(), 4 * SIZE * (SIZE - 1)); |
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adder.reset(); |
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m.forEachInParallel((Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue()), |
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(Long x) -> adder.add(x.longValue())); |
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assertEquals(adder.sum(), 3 * SIZE * (SIZE - 1) / 2); |
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adder.reset(); |
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m.forEachEntryInParallel((Map.Entry<Long,Long> e) -> Long.valueOf(e.getKey().longValue() + e.getValue().longValue()), |
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(Long x) -> adder.add(x.longValue())); |
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assertEquals(adder.sum(), 3 * SIZE * (SIZE - 1) / 2); |
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} |
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|
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/** |
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* reduceKeysSequentially, reduceValuesSequentially, |
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* reduceSequentially, reduceEntriesSequentially, |
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* reduceKeysInParallel, reduceValuesInParallel, reduceInParallel, |
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* and reduceEntriesInParallel, accumulate across all keys, |
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* values, entries, or mappings accordingly |
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*/ |
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public void testReduce() { |
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ConcurrentHashMap<Long, Long> m = longMap(); |
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Long r; |
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r = m.reduceKeysSequentially((Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())); |
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assertEquals((long)r, (long)SIZE * (SIZE - 1) / 2); |
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r = m.reduceValuesSequentially((Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())); |
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assertEquals((long)r, (long)SIZE * (SIZE - 1)); |
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r = m.reduceSequentially((Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue()), |
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(Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())); |
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|
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assertEquals((long)r, (long)3 * SIZE * (SIZE - 1) / 2); |
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r = m.reduceEntriesSequentially((Map.Entry<Long,Long> e) -> Long.valueOf(e.getKey().longValue() + e.getValue().longValue()), |
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(Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())); |
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assertEquals((long)r, (long)3 * SIZE * (SIZE - 1) / 2); |
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|
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r = m.reduceKeysInParallel((Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())); |
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assertEquals((long)r, (long)SIZE * (SIZE - 1) / 2); |
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r = m.reduceValuesInParallel((Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())); |
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assertEquals((long)r, (long)SIZE * (SIZE - 1)); |
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r = m.reduceInParallel((Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue()), |
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(Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())); |
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assertEquals((long)r, (long)3 * SIZE * (SIZE - 1) / 2); |
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r = m.reduceEntriesInParallel((Map.Entry<Long,Long> e) -> Long.valueOf(e.getKey().longValue() + e.getValue().longValue()), |
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(Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())); |
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assertEquals((long)r, (long)3 * SIZE * (SIZE - 1) / 2); |
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} |
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|
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/* |
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* Mapped reduceKeysSequentially, reduceKeysToIntSequentially, |
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* reduceKeysToLongSequentially, reduceKeysToDoubleSequentially, |
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* reduceValuesSequentially, reduceValuesToLongSequentially, |
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* reduceValuesToDoubleSequentially, reduceKeysInParallel, |
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* reduceKeysToLongInParallel, reduceKeysToIntInParallel, |
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* reduceKeysToDoubleInParallel, reduceValuesInParallel, |
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* reduceValuesToLongInParallel, reduceValuesToIntInParallel, |
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* reduceValuesToDoubleInParallel accumulate mapped keys, values, |
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* entries, or mappings accordingly |
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*/ |
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public void testMapReduce() { |
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ConcurrentHashMap<Long, Long> m = longMap(); |
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Long r; long lr; int ir; double dr; |
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r = m.reduceKeysSequentially((Long x) -> Long.valueOf(4 * x.longValue()), |
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(Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())); |
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assertEquals((long)r, (long)4 * SIZE * (SIZE - 1) / 2); |
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lr = m.reduceKeysToLongSequentially((Long x) -> x.longValue(), 0L, Long::sum); |
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assertEquals(lr, (long)SIZE * (SIZE - 1) / 2); |
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|
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ir = m.reduceKeysToIntSequentially((Long x) -> x.intValue(), 0, Integer::sum); |
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assertEquals(ir, (int)SIZE * (SIZE - 1) / 2); |
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dr = m.reduceKeysToDoubleSequentially((Long x) -> x.doubleValue(), 0.0, Double::sum); |
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assertEquals(dr, (double)SIZE * (SIZE - 1) / 2); |
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|
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r = m.reduceValuesSequentially((Long x) -> Long.valueOf(4 * x.longValue()), |
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(Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())); |
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assertEquals((long)r, (long)4 * SIZE * (SIZE - 1)); |
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lr = m.reduceValuesToLongSequentially((Long x) -> x.longValue(), 0L, Long::sum); |
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assertEquals(lr, (long)SIZE * (SIZE - 1)); |
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ir = m.reduceValuesToIntSequentially((Long x) -> x.intValue(), 0, Integer::sum); |
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assertEquals(ir, (int)SIZE * (SIZE - 1)); |
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|
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dr = m.reduceValuesToDoubleSequentially((Long x) -> x.doubleValue(), 0.0, Double::sum); |
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assertEquals(dr, (double)SIZE * (SIZE - 1)); |
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|
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r = m.reduceKeysInParallel((Long x) -> Long.valueOf(4 * x.longValue()), |
300 |
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(Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())); |
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assertEquals((long)r, (long)4 * SIZE * (SIZE - 1) / 2); |
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lr = m.reduceKeysToLongInParallel((Long x) -> x.longValue(), 0L, Long::sum); |
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assertEquals(lr, (long)SIZE * (SIZE - 1) / 2); |
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ir = m.reduceKeysToIntInParallel((Long x) -> x.intValue(), 0, Integer::sum); |
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assertEquals(ir, (int)SIZE * (SIZE - 1) / 2); |
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dr = m.reduceKeysToDoubleInParallel((Long x) -> x.doubleValue(), 0.0, Double::sum); |
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assertEquals(dr, (double)SIZE * (SIZE - 1) / 2); |
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|
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r = m.reduceValuesInParallel((Long x) -> Long.valueOf(4 * x.longValue()), |
310 |
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(Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())); |
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assertEquals((long)r, (long)4 * SIZE * (SIZE - 1)); |
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lr = m.reduceValuesToLongInParallel((Long x) -> x.longValue(), 0L, Long::sum); |
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assertEquals(lr, (long)SIZE * (SIZE - 1)); |
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ir = m.reduceValuesToIntInParallel((Long x) -> x.intValue(), 0, Integer::sum); |
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assertEquals(ir, (int)SIZE * (SIZE - 1)); |
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dr = m.reduceValuesToDoubleInParallel((Long x) -> x.doubleValue(), 0.0, Double::sum); |
317 |
> |
assertEquals(dr, (double)SIZE * (SIZE - 1)); |
318 |
> |
} |
319 |
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|
320 |
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/** |
321 |
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* searchKeysSequentially, searchValuesSequentially, |
322 |
> |
* searchSequentially, searchEntriesSequentially, |
323 |
> |
* searchKeysInParallel, searchValuesInParallel, searchInParallel, |
324 |
> |
* searchEntriesInParallel all return a non-null result of search |
325 |
> |
* function, or null if none, across keys, values, entries, or |
326 |
> |
* mappings accordingly |
327 |
> |
*/ |
328 |
> |
public void testSearch() { |
329 |
> |
ConcurrentHashMap<Long, Long> m = longMap(); |
330 |
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Long r; |
331 |
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r = m.searchKeysSequentially((Long x) -> x.longValue() == (long)(SIZE/2)? x : null); |
332 |
> |
assertEquals((long)r, (long)(SIZE/2)); |
333 |
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r = m.searchValuesSequentially((Long x) -> x.longValue() == (long)(SIZE/2)? x : null); |
334 |
> |
assertEquals((long)r, (long)(SIZE/2)); |
335 |
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r = m.searchSequentially((Long x, Long y) -> x.longValue() == (long)(SIZE/2)? x : null); |
336 |
> |
assertEquals((long)r, (long)(SIZE/2)); |
337 |
> |
r = m.searchEntriesSequentially((Map.Entry<Long,Long> e) -> e.getKey().longValue() == (long)(SIZE/2)? e.getKey() : null); |
338 |
> |
assertEquals((long)r, (long)(SIZE/2)); |
339 |
> |
|
340 |
> |
r = m.searchKeysSequentially((Long x) -> x.longValue() < 0L? x : null); |
341 |
> |
assertNull(r); |
342 |
> |
r = m.searchValuesSequentially((Long x) -> x.longValue() < 0L? x : null); |
343 |
> |
assertNull(r); |
344 |
> |
r = m.searchSequentially((Long x, Long y) -> x.longValue() < 0L? x : null); |
345 |
> |
assertNull(r); |
346 |
> |
r = m.searchEntriesSequentially((Map.Entry<Long,Long> e) -> e.getKey().longValue() < 0L? e.getKey() : null); |
347 |
> |
assertNull(r); |
348 |
> |
|
349 |
> |
r = m.searchKeysInParallel((Long x) -> x.longValue() == (long)(SIZE/2)? x : null); |
350 |
> |
assertEquals((long)r, (long)(SIZE/2)); |
351 |
> |
r = m.searchValuesInParallel((Long x) -> x.longValue() == (long)(SIZE/2)? x : null); |
352 |
> |
assertEquals((long)r, (long)(SIZE/2)); |
353 |
> |
r = m.searchInParallel((Long x, Long y) -> x.longValue() == (long)(SIZE/2)? x : null); |
354 |
> |
assertEquals((long)r, (long)(SIZE/2)); |
355 |
> |
r = m.searchEntriesInParallel((Map.Entry<Long,Long> e) -> e.getKey().longValue() == (long)(SIZE/2)? e.getKey() : null); |
356 |
> |
assertEquals((long)r, (long)(SIZE/2)); |
357 |
> |
|
358 |
> |
r = m.searchKeysInParallel((Long x) -> x.longValue() < 0L? x : null); |
359 |
> |
assertNull(r); |
360 |
> |
r = m.searchValuesInParallel((Long x) -> x.longValue() < 0L? x : null); |
361 |
> |
assertNull(r); |
362 |
> |
r = m.searchInParallel((Long x, Long y) -> x.longValue() < 0L? x : null); |
363 |
> |
assertNull(r); |
364 |
> |
r = m.searchEntriesInParallel((Map.Entry<Long,Long> e) -> e.getKey().longValue() < 0L? e.getKey() : null); |
365 |
> |
assertNull(r); |
366 |
> |
} |
367 |
> |
|
368 |
> |
/** |
369 |
> |
* Invoking task versions of bulk methods has same effect as |
370 |
> |
* parallel methods |
371 |
> |
*/ |
372 |
> |
public void testForkJoinTasks() { |
373 |
> |
LongAdder adder = new LongAdder(); |
374 |
> |
ConcurrentHashMap<Long, Long> m = longMap(); |
375 |
> |
ConcurrentHashMap.ForkJoinTasks.forEachKey |
376 |
> |
(m, (Long x) -> adder.add(x.longValue())).invoke(); |
377 |
> |
assertEquals(adder.sum(), SIZE * (SIZE - 1) / 2); |
378 |
> |
adder.reset(); |
379 |
> |
ConcurrentHashMap.ForkJoinTasks.forEachValue |
380 |
> |
(m, (Long x) -> adder.add(x.longValue())).invoke(); |
381 |
> |
assertEquals(adder.sum(), SIZE * (SIZE - 1)); |
382 |
> |
adder.reset(); |
383 |
> |
ConcurrentHashMap.ForkJoinTasks.forEach |
384 |
> |
(m, (Long x, Long y) -> adder.add(x.longValue() + y.longValue())).invoke(); |
385 |
> |
assertEquals(adder.sum(), 3 * SIZE * (SIZE - 1) / 2); |
386 |
> |
adder.reset(); |
387 |
> |
ConcurrentHashMap.ForkJoinTasks.forEachEntry |
388 |
> |
(m, |
389 |
> |
(Map.Entry<Long,Long> e) -> adder.add(e.getKey().longValue() + e.getValue().longValue())).invoke(); |
390 |
> |
assertEquals(adder.sum(), 3 * SIZE * (SIZE - 1) / 2); |
391 |
> |
adder.reset(); |
392 |
> |
ConcurrentHashMap.ForkJoinTasks.forEachKey |
393 |
> |
(m, (Long x) -> Long.valueOf(4 * x.longValue()), |
394 |
> |
(Long x) -> adder.add(x.longValue())).invoke(); |
395 |
> |
assertEquals(adder.sum(), 4 * SIZE * (SIZE - 1) / 2); |
396 |
> |
adder.reset(); |
397 |
> |
ConcurrentHashMap.ForkJoinTasks.forEachValue |
398 |
> |
(m, (Long x) -> Long.valueOf(4 * x.longValue()), |
399 |
> |
(Long x) -> adder.add(x.longValue())).invoke(); |
400 |
> |
assertEquals(adder.sum(), 4 * SIZE * (SIZE - 1)); |
401 |
> |
adder.reset(); |
402 |
> |
ConcurrentHashMap.ForkJoinTasks.forEach |
403 |
> |
(m, (Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue()), |
404 |
> |
(Long x) -> adder.add(x.longValue())).invoke(); |
405 |
> |
assertEquals(adder.sum(), 3 * SIZE * (SIZE - 1) / 2); |
406 |
> |
adder.reset(); |
407 |
> |
ConcurrentHashMap.ForkJoinTasks.forEachEntry |
408 |
> |
(m, (Map.Entry<Long,Long> e) -> Long.valueOf(e.getKey().longValue() + e.getValue().longValue()), |
409 |
> |
(Long x) -> adder.add(x.longValue())).invoke(); |
410 |
> |
assertEquals(adder.sum(), 3 * SIZE * (SIZE - 1) / 2); |
411 |
> |
adder.reset(); |
412 |
> |
|
413 |
> |
Long r; long lr; int ir; double dr; |
414 |
> |
r = ConcurrentHashMap.ForkJoinTasks.reduceKeys |
415 |
> |
(m, (Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())).invoke(); |
416 |
> |
assertEquals((long)r, (long)SIZE * (SIZE - 1) / 2); |
417 |
> |
r = ConcurrentHashMap.ForkJoinTasks.reduceValues |
418 |
> |
(m, (Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())).invoke(); |
419 |
> |
assertEquals((long)r, (long)SIZE * (SIZE - 1)); |
420 |
> |
r = ConcurrentHashMap.ForkJoinTasks.reduce |
421 |
> |
(m, (Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue()), |
422 |
> |
(Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())).invoke(); |
423 |
> |
assertEquals((long)r, (long)3 * SIZE * (SIZE - 1) / 2); |
424 |
> |
r = ConcurrentHashMap.ForkJoinTasks.reduceEntries |
425 |
> |
(m, (Map.Entry<Long,Long> e) -> Long.valueOf(e.getKey().longValue() + e.getValue().longValue()), |
426 |
> |
(Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())).invoke(); |
427 |
> |
assertEquals((long)r, (long)3 * SIZE * (SIZE - 1) / 2); |
428 |
> |
r = ConcurrentHashMap.ForkJoinTasks.reduceKeys |
429 |
> |
(m, (Long x) -> Long.valueOf(4 * x.longValue()), |
430 |
> |
(Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())).invoke(); |
431 |
> |
assertEquals((long)r, (long)4 * SIZE * (SIZE - 1) / 2); |
432 |
> |
lr = ConcurrentHashMap.ForkJoinTasks.reduceKeysToLong |
433 |
> |
(m, (Long x) -> x.longValue(), 0L, Long::sum).invoke(); |
434 |
> |
assertEquals(lr, (long)SIZE * (SIZE - 1) / 2); |
435 |
> |
ir = ConcurrentHashMap.ForkJoinTasks.reduceKeysToInt |
436 |
> |
(m, (Long x) -> x.intValue(), 0, Integer::sum).invoke(); |
437 |
> |
assertEquals(ir, (int)SIZE * (SIZE - 1) / 2); |
438 |
> |
dr = ConcurrentHashMap.ForkJoinTasks.reduceKeysToDouble |
439 |
> |
(m, (Long x) -> x.doubleValue(), 0.0, Double::sum).invoke(); |
440 |
> |
assertEquals(dr, (double)SIZE * (SIZE - 1) / 2); |
441 |
> |
r = ConcurrentHashMap.ForkJoinTasks.reduceValues |
442 |
> |
(m, (Long x) -> Long.valueOf(4 * x.longValue()), |
443 |
> |
(Long x, Long y) -> Long.valueOf(x.longValue() + y.longValue())).invoke(); |
444 |
> |
assertEquals((long)r, (long)4 * SIZE * (SIZE - 1)); |
445 |
> |
lr = ConcurrentHashMap.ForkJoinTasks.reduceValuesToLong |
446 |
> |
(m, (Long x) -> x.longValue(), 0L, Long::sum).invoke(); |
447 |
> |
assertEquals(lr, (long)SIZE * (SIZE - 1)); |
448 |
> |
ir = ConcurrentHashMap.ForkJoinTasks.reduceValuesToInt |
449 |
> |
(m, (Long x) -> x.intValue(), 0, Integer::sum).invoke(); |
450 |
> |
assertEquals(ir, (int)SIZE * (SIZE - 1)); |
451 |
> |
dr = ConcurrentHashMap.ForkJoinTasks.reduceValuesToDouble |
452 |
> |
(m, (Long x) -> x.doubleValue(), 0.0, Double::sum).invoke(); |
453 |
> |
assertEquals(dr, (double)SIZE * (SIZE - 1)); |
454 |
> |
r = ConcurrentHashMap.ForkJoinTasks.searchKeys |
455 |
> |
(m, (Long x) -> x.longValue() == (long)(SIZE/2)? x : null).invoke(); |
456 |
> |
assertEquals((long)r, (long)(SIZE/2)); |
457 |
> |
r = ConcurrentHashMap.ForkJoinTasks.searchValues |
458 |
> |
(m, (Long x) -> x.longValue() == (long)(SIZE/2)? x : null).invoke(); |
459 |
> |
assertEquals((long)r, (long)(SIZE/2)); |
460 |
> |
r = ConcurrentHashMap.ForkJoinTasks.search |
461 |
> |
(m, (Long x, Long y) -> x.longValue() == (long)(SIZE/2)? x : null).invoke(); |
462 |
> |
assertEquals((long)r, (long)(SIZE/2)); |
463 |
> |
r = ConcurrentHashMap.ForkJoinTasks.searchEntries |
464 |
> |
(m, (Map.Entry<Long,Long> e) -> e.getKey().longValue() == (long)(SIZE/2)? e.getKey() : null).invoke(); |
465 |
> |
assertEquals((long)r, (long)(SIZE/2)); |
466 |
> |
} |
467 |
|
} |