ctubbsii commented on code in PR #2811:
URL: https://github.com/apache/accumulo/pull/2811#discussion_r983712872
##########
core/src/main/java/org/apache/accumulo/core/file/rfile/RelativeKey.java:
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@@ -174,40 +168,13 @@ public void readFields(DataInput in) throws IOException {
fieldsPrefixed = 0;
}
- byte[] row, cf, cq, cv;
- long ts;
-
- if ((fieldsSame & ROW_SAME) == ROW_SAME) {
- row = prevKey.getRowData().toArray();
- } else if ((fieldsPrefixed & ROW_COMMON_PREFIX) == ROW_COMMON_PREFIX) {
- row = readPrefix(in, prevKey.getRowData());
- } else {
- row = read(in);
- }
+ final byte[] row, cf, cq, cv;
+ final long ts;
- if ((fieldsSame & CF_SAME) == CF_SAME) {
- cf = prevKey.getColumnFamilyData().toArray();
- } else if ((fieldsPrefixed & CF_COMMON_PREFIX) == CF_COMMON_PREFIX) {
- cf = readPrefix(in, prevKey.getColumnFamilyData());
- } else {
- cf = read(in);
- }
-
- if ((fieldsSame & CQ_SAME) == CQ_SAME) {
- cq = prevKey.getColumnQualifierData().toArray();
- } else if ((fieldsPrefixed & CQ_COMMON_PREFIX) == CQ_COMMON_PREFIX) {
- cq = readPrefix(in, prevKey.getColumnQualifierData());
- } else {
- cq = read(in);
- }
-
- if ((fieldsSame & CV_SAME) == CV_SAME) {
- cv = prevKey.getColumnVisibilityData().toArray();
- } else if ((fieldsPrefixed & CV_COMMON_PREFIX) == CV_COMMON_PREFIX) {
- cv = readPrefix(in, prevKey.getColumnVisibilityData());
- } else {
- cv = read(in);
- }
+ row = getData(in, ROW_SAME, ROW_COMMON_PREFIX, () -> prevKey.getRowData());
+ cf = getData(in, CF_SAME, CF_COMMON_PREFIX, () ->
prevKey.getColumnFamilyData());
+ cq = getData(in, CQ_SAME, CQ_COMMON_PREFIX, () ->
prevKey.getColumnQualifierData());
+ cv = getData(in, CV_SAME, CV_COMMON_PREFIX, () ->
prevKey.getColumnVisibilityData());
Review Comment:
I love the use of lambdas, but I think these can just use the form like
`prevKey::getColumnFamilyData`, right?
##########
core/src/main/java/org/apache/accumulo/core/spi/balancer/SimpleLoadBalancer.java:
##########
@@ -297,10 +275,7 @@ List<TabletMigration> move(ServerCounts tooMuch,
ServerCounts tooLittle, int cou
* is only one tabletserver that holds all of the tablets. Here we check
to see if in fact
* that is the case and if so set the value to 0.
*/
- tooLittleCount = tooLittleMap.get(table);
- if (tooLittleCount == null) {
- tooLittleCount = 0;
- }
+ Integer tooLittleCount = tooLittleMap.getOrDefault(table, 0);
Review Comment:
I briefly looked, and didn't see an Integer.ZERO. Such a thing would be
useful here, if it existed, so we don't have to keep boxing `0`. But, I'm sure
this is fine. The JRE can optimize stuff like this if it wanted to.
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