HDFS-12692. Ozone: fix javadoc/unit test for calling MetadataStore.getRangeKVs with non existing key. Contributed by Elek, Marton.
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@ -286,7 +286,7 @@ public List<Map.Entry<byte[], byte[]>> getSequentialRangeKVs(byte[] startKey,
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* If the startKey is specified and found in levelDB, this key and the keys
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* after this key will be included in the result. If the startKey is null
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* all entries will be included as long as other conditions are satisfied.
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* If the given startKey doesn't exist, an IOException will be thrown.
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* If the given startKey doesn't exist, an empty list will be returned.
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* <p>
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* The count argument is to limit number of total entries to return,
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* the value for count must be an integer greater than 0.
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@ -78,7 +78,7 @@ public interface MetadataStore extends Closeable{
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* If the startKey is specified and found in levelDB, this key and the keys
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* after this key will be included in the result. If the startKey is null
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* all entries will be included as long as other conditions are satisfied.
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* If the given startKey doesn't exist, an IOException will be thrown.
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* If the given startKey doesn't exist and empty list will be returned.
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* <p>
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* The count argument is to limit number of total entries to return,
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* the value for count must be an integer greater than 0.
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@ -95,7 +95,7 @@ public void init() throws IOException {
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// Add 20 entries.
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// {a0 : a-value0} to {a9 : a-value9}
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// {b0 : a-value0} to {b0 : b-value9}
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// {b0 : b-value0} to {b9 : b-value9}
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for (int i=0; i<10; i++) {
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store.put(getBytes("a" + i), getBytes("a-value" + i));
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store.put(getBytes("b" + i), getBytes("b-value" + i));
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@ -242,6 +242,10 @@ public void testGetRangeKVs() throws IOException {
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Assert.assertEquals(5, result.size());
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Assert.assertEquals("a-value2", getString(result.get(2).getValue()));
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// Empty list if startKey doesn't exist.
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result = store.getRangeKVs(getBytes("a12"), 5);
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Assert.assertEquals(0, result.size());
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// Returns max available entries after a valid startKey.
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result = store.getRangeKVs(getBytes("b0"), MAX_GETRANGE_LENGTH);
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Assert.assertEquals(10, result.size());
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