saintstack commented on a change in pull request #2901:
URL: https://github.com/apache/hbase/pull/2901#discussion_r615960607
##########
File path: bin/hbase
##########
@@ -480,6 +480,11 @@ add_jdk11_deps_to_classpath() {
done
}
+enable_trace() {
+ agent_jar=$(find lib/trace -type f -name "opentelemetry-javaagent-*")
+ HBASE_OPTS="$HBASE_OPTS -javaagent:$agent_jar $HBASE_TRACE_OPTS"
Review comment:
It'll just fail if two classes w/ same prefix... that is fine I think
and shouldn't happen usually.
##########
File path:
hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncRegionLocator.java
##########
@@ -84,64 +96,100 @@ private boolean isMeta(TableName tableName) {
return TableName.isMetaTableName(tableName);
}
+ private <T> CompletableFuture<T>
tracedLocationFuture(Supplier<CompletableFuture<T>> action,
+ Function<T, List<String>> getRegionNames, TableName tableName, String
methodName) {
+ Span span = createTableSpan("AsyncRegionLocator." + methodName, tableName);
+ try (Scope scope = span.makeCurrent()) {
+ CompletableFuture<T> future = action.get();
+ FutureUtils.addListener(future, (resp, error) -> {
+ if (error != null) {
+ TraceUtil.setError(span, error);
+ } else {
+ List<String> regionNames = getRegionNames.apply(resp);
+ if (!regionNames.isEmpty()) {
+ span.setAttribute(REGION_NAMES_KEY, regionNames);
+ }
+ span.setStatus(StatusCode.OK);
+ }
+ span.end();
+ });
+ return future;
+ }
+ }
+
+ private List<String> getRegionName(RegionLocations locs) {
+ List<String> names = new ArrayList<>();
+ for (HRegionLocation loc : locs.getRegionLocations()) {
+ if (loc != null) {
+ names.add(loc.getRegion().getRegionNameAsString());
+ }
+ }
Review comment:
Great.
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