jdeppe-pivotal commented on a change in pull request #6701:
URL: https://github.com/apache/geode/pull/6701#discussion_r671472287
##########
File path:
geode-apis-compatible-with-redis/src/main/java/org/apache/geode/redis/internal/data/RedisHash.java
##########
@@ -237,35 +237,32 @@ public int hstrlen(byte[] field) {
return new ArrayList<>(hash.keySet());
}
- public ImmutablePair<Integer, List<byte[]>> hscan(Pattern matchPattern,
- int count,
- int cursor) {
-
- ArrayList<byte[]> resultList = new ArrayList<>(count + 2);
+ public ImmutablePair<Integer, List<ImmutablePair<byte[], byte[]>>>
hscan(Pattern matchPattern,
+ int count, int cursor) {
+ // No need to allocate more space than it's possible to use given the size
of the hash
+ int initialCapacity = Math.min(count, hash.size());
+ List<ImmutablePair<byte[], byte[]>> resultList = new
ArrayList<>(initialCapacity);
do {
cursor = hash.scan(cursor, 1,
(list, key, value) -> addIfMatching(matchPattern, list, key, value),
resultList);
- } while (cursor != 0 && resultList.size() < (count * 2));
+ } while (cursor != 0 && resultList.size() < count);
return new ImmutablePair<>(cursor, resultList);
}
- private void addIfMatching(Pattern matchPattern, List<byte[]> resultList,
byte[] key,
- byte[] value) {
+ private void addIfMatching(Pattern matchPattern, List<ImmutablePair<byte[],
byte[]>> resultList,
+ byte[] key, byte[] value) {
if (matchPattern != null) {
if (matchPattern.matcher(bytesToString(key)).matches()) {
- resultList.add(key);
- resultList.add(value);
+ resultList.add(new ImmutablePair<>(key, value));
Review comment:
Conceptually I like pairing the key and value here, but it is an
additional memory allocation that doesn't add any functional value AFAICT.
##########
File path:
geode-apis-compatible-with-redis/src/integrationTest/java/org/apache/geode/redis/internal/executor/hash/AbstractHScanIntegrationTest.java
##########
@@ -577,16 +569,44 @@ private void
multipleHScanAndAssertOnSizeOfResultSet(Jedis jedis,
.isEqualTo(initialHashData.size());
}
- private Map<String, String> makeEntrySet(int sizeOfDataSet) {
+ private Map<String, String> initializeThreeFieldHash() {
+ Map<String, String> entryMap = new HashMap<>();
+ entryMap.put(FIELD_ONE, VALUE_ONE);
+ entryMap.put(FIELD_TWO, VALUE_TWO);
+ entryMap.put(FIELD_THREE, VALUE_THREE);
+ jedis.hmset(HASH_KEY, entryMap);
+ return entryMap;
+ }
+
+ Map<byte[], byte[]> initializeThreeFieldHashBytes() {
+ Map<byte[], byte[]> entryMap = new HashMap<>();
+ entryMap.put(FIELD_ONE.getBytes(), VALUE_ONE.getBytes());
+ entryMap.put(FIELD_TWO.getBytes(), VALUE_TWO.getBytes());
+ entryMap.put(FIELD_THREE_BYTES, VALUE_THREE.getBytes());
+ jedis.hmset(HASH_KEY.getBytes(), entryMap);
+ return entryMap;
+ }
+
+ private Map<String, String> makeEntryMap() {
Map<String, String> dataSet = new HashMap<>();
- for (int i = 0; i < sizeOfDataSet; i++) {
+ for (int i = 0; i < SIZE_OF_ENTRY_MAP; i++) {
dataSet.put(BASE_FIELD + i, "value_" + i);
}
return dataSet;
}
- private int getSlotForKey(String key) {
- int crc = CRC16.calculate(key);
+ private int getSlotForKey() {
Review comment:
The slot could just be a static field now.
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