saintstack commented on a change in pull request #3532:
URL: https://github.com/apache/hbase/pull/3532#discussion_r686374412



##########
File path: hbase-client/src/main/java/org/apache/hadoop/hbase/client/Get.java
##########
@@ -339,6 +340,21 @@ public Get setFilter(Filter filter) {
     return this;
   }
 
+  /**
+   * Set the maximum result size. The default is -1; this means that no 
specific
+   * maximum result size will be set for this Get.
+   *
+   * If set to a value greater than zero, the server may respond with a Result 
where
+   * {@link Result#mayHaveMoreCellsInRow()} is true. The user is required to 
handle
+   * this case.

Review comment:
       I want a Cell Streaming API.

##########
File path: 
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
##########
@@ -7518,11 +7516,35 @@ void prepareGet(final Get get) throws IOException {
 
   @Override
   public List<Cell> get(Get get, boolean withCoprocessor) throws IOException {
-    return get(get, withCoprocessor, HConstants.NO_NONCE, HConstants.NO_NONCE);
+    return getInternal(get, withCoprocessor, HConstants.NO_NONCE, 
HConstants.NO_NONCE).getFirst();
   }
 
-  private List<Cell> get(Get get, boolean withCoprocessor, long nonceGroup, 
long nonce)
-      throws IOException {
+  private Result get(Get get, boolean withCoprocessor, long nonceGroup, long 
nonce)
+    throws IOException {
+    Pair<List<Cell>, ScannerContext> result = getInternal(get, 
withCoprocessor, nonceGroup, nonce);
+    boolean stale = this.getRegionInfo().getReplicaId() != 0;
+
+    return Result.create(
+      result.getFirst(),
+      get.isCheckExistenceOnly() ? !result.getFirst().isEmpty() : null,
+      stale,
+      result.getSecond().mayHaveMoreCellsInRow());
+  }
+
+  private Pair<List<Cell>, ScannerContext> getInternal(Get get, boolean 
withCoprocessor, long nonceGroup, long nonce)
+    throws IOException {
+    ScannerContext scannerContext = ScannerContext.newBuilder()

Review comment:
       Thanks.




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