yuqi1129 commented on a change in pull request #2619:
URL: https://github.com/apache/iotdb/pull/2619#discussion_r571349837
##########
File path:
cluster/src/main/java/org/apache/iotdb/cluster/client/sync/SyncClientAdaptor.java
##########
@@ -349,6 +351,26 @@ public static Integer getPathCount(AsyncDataClient client,
Node header, List<Str
return handler.getResult(RaftServer.getReadOperationTimeoutMS());
}
+ public static Set<String> getDevices(AsyncDataClient client, Node header,
ShowDevicesPlan plan)
+ throws InterruptedException, TException, IOException {
+ GetDevicesHandler handler = new GetDevicesHandler();
+ AtomicReference<Set<String>> response = new AtomicReference<>(null);
+ handler.setResponse(response);
+ handler.setContact(client.getNode());
+ ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+ DataOutputStream dataOutputStream = new
DataOutputStream(byteArrayOutputStream);
+ plan.serialize(dataOutputStream);
+
+ client.getDevices(header,
ByteBuffer.wrap(byteArrayOutputStream.toByteArray()),
+ handler);
+ synchronized (response) {
Review comment:
`response` is a local variants and will create a new instance when
getDevices is called, so
synchronized response seems unnecessary
##########
File path:
cluster/src/main/java/org/apache/iotdb/cluster/metadata/CMManager.java
##########
@@ -1298,6 +1299,49 @@ protected MeasurementMNode getMeasurementMNode(MNode
deviceMNode, String measure
return super.showTimeseries(plan, context);
}
+ public Set<PartialPath> getLocalDevices(ShowDevicesPlan plan) throws
MetadataException {
+ return super.getDevices(plan);
+ }
+
+ @Override
+ public Set<PartialPath> getDevices(ShowDevicesPlan plan) throws
MetadataException {
+ ConcurrentSkipListSet<PartialPath> resultSet = new
ConcurrentSkipListSet<>();
+ ExecutorService pool = new ThreadPoolExecutor(THREAD_POOL_SIZE,
THREAD_POOL_SIZE, 0,
+ TimeUnit.SECONDS, new LinkedBlockingDeque<>());
+ List<PartitionGroup> globalGroups =
metaGroupMember.getPartitionTable().getGlobalGroups();
+
+ int limit = plan.getLimit() == 0 ? Integer.MAX_VALUE : plan.getLimit();
+ int offset = plan.getOffset();
+ // do not use limit and offset in sub-queries unless offset is 0,
otherwise the results are
+ // not combinable
Review comment:
Have we check the limit and offset is reasonable , for example both is
greater than 0?
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