jiangpengcheng commented on code in PR #21966:
URL: https://github.com/apache/pulsar/pull/21966#discussion_r1466188662
##########
pulsar-functions/instance/src/main/java/org/apache/pulsar/functions/instance/state/BKStateStoreImpl.java:
##########
@@ -190,4 +191,39 @@ public ByteBuffer get(String key) {
throw new RuntimeException("Failed to retrieve the state value for
key '" + key + "'", e);
}
}
+
+ @Override
+ public StateValue getStateValue(String key) {
+ try {
+ return result(getStateValueAsync(key));
+ } catch (Exception e) {
+ throw new RuntimeException("Failed to retrieve the state value for
key '" + key + "'", e);
+ }
+ }
+
+ @Override
+ public CompletableFuture<StateValue> getStateValueAsync(String key) {
+ return
table.getKv(Unpooled.wrappedBuffer(key.getBytes(UTF_8))).thenApply(
+ data -> {
+ try {
+ if (data != null && data.value() != null) {
+ ByteBuffer result =
ByteBuffer.allocate(data.value().readableBytes());
+ data.value().readBytes(result);
+ // Set position to off the buffer to the
beginning, since the position after the
+ // read is going to be end of the buffer
+ // If we do not rewind to the beginning here,
users will have to explicitly do
+ // this in their function code
+ // in order to use any of the ByteBuffer operations
+ result.position(0);
Review Comment:
but the result is a new init `ByteBuffer`, I think its position was 0 before
reading?
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