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HBASE-9885 Avoid some Result creation in protobuf conversions 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1539429 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
nkeywal 2013-11-06 18:58:37 +00:00
parent ff84a7ae16
commit 6ba3c2339b
2 changed files with 69 additions and 20 deletions
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88
hbase-client/src/main/java/org/apache/hadoop/hbase/protobuf/ProtobufUtil.java
View File

@ -154,6 +154,35 @@ public final class ProtobufUtil {
private final static Map<String, Class<?>>
PRIMITIVES = new HashMap<String, Class<?>>();
/**
* Many results are simple: no cell, exists true or false. To save on object creations,
* we reuse them across calls.
*/
private final static Cell[] EMPTY_CELL_ARRAY = new Cell[]{};
private final static Result EMPTY_RESULT = Result.create(EMPTY_CELL_ARRAY);
private final static Result EMPTY_RESULT_EXISTS_TRUE = Result.create(null, true);
private final static Result EMPTY_RESULT_EXISTS_FALSE = Result.create(null, false);
private final static ClientProtos.Result EMPTY_RESULT_PB;
private final static ClientProtos.Result EMPTY_RESULT_PB_EXISTS_TRUE;
private final static ClientProtos.Result EMPTY_RESULT_PB_EXISTS_FALSE;
static {
ClientProtos.Result.Builder builder = ClientProtos.Result.newBuilder();
builder.setExists(true);
EMPTY_RESULT_PB_EXISTS_TRUE = builder.build();
builder.clear();
builder.setExists(false);
EMPTY_RESULT_PB_EXISTS_FALSE = builder.build();
builder.clear();
builder.setAssociatedCellCount(0);
EMPTY_RESULT_PB = builder.build();
}
/**
* Dynamic class loader to load filter/comparators
*/
@ -1083,16 +1112,20 @@ public final class ProtobufUtil {
* @return the converted protocol buffer Result
*/
public static ClientProtos.Result toResult(final Result result) {
if (result.getExists() != null) {
return toResult(result.getExists());
}
Cell[] cells = result.rawCells();
if (cells == null || cells.length == 0) {
return EMPTY_RESULT_PB;
}
ClientProtos.Result.Builder builder = ClientProtos.Result.newBuilder();
Cell [] cells = result.rawCells();
if (cells != null) {
for (Cell c : cells) {
builder.addCell(toCell(c));
}
}
if (result.getExists() != null){
builder.setExists(result.getExists());
for (Cell c : cells) {
builder.addCell(toCell(c));
}
return builder.build();
}
@ -1103,9 +1136,7 @@ public final class ProtobufUtil {
* @return the converted protocol buffer Result
*/
public static ClientProtos.Result toResult(final boolean existence) {
ClientProtos.Result.Builder builder = ClientProtos.Result.newBuilder();
builder.setExists(existence);
return builder.build();
return existence ? EMPTY_RESULT_PB_EXISTS_TRUE : EMPTY_RESULT_PB_EXISTS_FALSE;
}
/**
@ -1116,11 +1147,19 @@ public final class ProtobufUtil {
* @return the converted protocol buffer Result
*/
public static ClientProtos.Result toResultNoData(final Result result) {
ClientProtos.Result.Builder builder = ClientProtos.Result.newBuilder();
builder.setAssociatedCellCount(result.size());
if (result.getExists() != null){
builder.setExists(result.getExists());
return result.getExists() ? EMPTY_RESULT_PB_EXISTS_TRUE : EMPTY_RESULT_PB_EXISTS_FALSE;
}
int size = result.size();
if (size == 0){
return EMPTY_RESULT_PB;
}
ClientProtos.Result.Builder builder = ClientProtos.Result.newBuilder();
builder.setAssociatedCellCount(size);
return builder.build();
}
@ -1132,10 +1171,14 @@ public final class ProtobufUtil {
*/
public static Result toResult(final ClientProtos.Result proto) {
if (proto.hasExists()) {
return Result.create(null, proto.getExists());
return proto.getExists() ? EMPTY_RESULT_EXISTS_TRUE : EMPTY_RESULT_EXISTS_FALSE;
}
List<CellProtos.Cell> values = proto.getCellList();
if (values.isEmpty()){
return EMPTY_RESULT;
}
List<Cell> cells = new ArrayList<Cell>(values.size());
for (CellProtos.Cell c : values) {
cells.add(toCell(c));
@ -1154,7 +1197,7 @@ public final class ProtobufUtil {
public static Result toResult(final ClientProtos.Result proto, final CellScanner scanner)
throws IOException {
if (proto.hasExists()){
return Result.create(null, proto.getExists());
return proto.getExists() ? EMPTY_RESULT_EXISTS_TRUE : EMPTY_RESULT_EXISTS_FALSE;
}
// TODO: Unit test that has some Cells in scanner and some in the proto.
@ -1168,13 +1211,20 @@ public final class ProtobufUtil {
}
}
List<CellProtos.Cell> values = proto.getCellList();
if (cells == null) cells = new ArrayList<Cell>(values.size());
for (CellProtos.Cell c: values) {
cells.add(toCell(c));
if (cells == null) {
if (values.isEmpty()) {
return EMPTY_RESULT;
} else {
cells = new ArrayList<Cell>(values.size());
for (CellProtos.Cell c : values) {
cells.add(toCell(c));
}
}
}
return Result.create(cells, null);
}
/**
* Convert a ByteArrayComparable to a protocol buffer Comparator
*

1
hbase-client/src/main/java/org/apache/hadoop/hbase/protobuf/RequestConverter.java
View File

@ -488,7 +488,6 @@ public final class RequestConverter {
throws IOException {
RegionAction.Builder builder = getRegionActionBuilderWithRegion(regionName);
ClientProtos.Action.Builder actionBuilder = ClientProtos.Action.newBuilder();
MutationProto.Builder mutationBuilder = ClientProtos.MutationProto.newBuilder();
for (Action<R> action: actions) {
Row row = action.getAction();
actionBuilder.clear();