saintstack commented on a change in pull request #287: HBASE-21512 Reimplement
sync client based on async client
URL: https://github.com/apache/hbase/pull/287#discussion_r291393009
##########
File path:
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionUtils.java
##########
@@ -695,4 +606,94 @@ static void updateStats(Optional<ServerStatisticTracker>
optStats,
metrics -> ResultStatsUtil.updateStats(metrics, serverName,
regionName, regionLoadStats));
});
}
+
+ @FunctionalInterface
+ interface Converter<D, I, S> {
+ D convert(I info, S src) throws IOException;
+ }
+
+ @FunctionalInterface
+ interface RpcCall<RESP, REQ> {
+ void call(ClientService.Interface stub, HBaseRpcController controller, REQ
req,
+ RpcCallback<RESP> done);
+ }
+
+ static <REQ, PREQ, PRESP, RESP> CompletableFuture<RESP>
call(HBaseRpcController controller,
+ HRegionLocation loc, ClientService.Interface stub, REQ req,
+ Converter<PREQ, byte[], REQ> reqConvert, RpcCall<PRESP, PREQ> rpcCall,
+ Converter<RESP, HBaseRpcController, PRESP> respConverter) {
+ CompletableFuture<RESP> future = new CompletableFuture<>();
+ try {
+ rpcCall.call(stub, controller,
reqConvert.convert(loc.getRegion().getRegionName(), req),
+ new RpcCallback<PRESP>() {
+
+ @Override
+ public void run(PRESP resp) {
+ if (controller.failed()) {
+ future.completeExceptionally(controller.getFailed());
+ } else {
+ try {
+ future.complete(respConverter.convert(controller, resp));
+ } catch (IOException e) {
+ future.completeExceptionally(e);
+ }
+ }
+ }
+ });
+ } catch (IOException e) {
+ future.completeExceptionally(e);
+ }
+ return future;
+ }
+
+ static ThreadPoolExecutor getThreadPool(Configuration conf, int maxThreads,
int coreThreads,
Review comment:
Or it is just generic utility? Want to say in comment what choices it makes
internally when say maxThreads == 0.
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