jt2594838 commented on a change in pull request #2619:
URL: https://github.com/apache/iotdb/pull/2619#discussion_r571751733
##########
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:
I think `GetDevicesHandler` has the answer.
##########
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:
It should be checked in plan generation, instead of execution.
##########
File path:
cluster/src/main/java/org/apache/iotdb/cluster/server/handlers/caller/GetDevicesHandler.java
##########
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.iotdb.cluster.server.handlers.caller;
+
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicReference;
+import org.apache.iotdb.cluster.rpc.thrift.Node;
+import org.apache.thrift.async.AsyncMethodCallback;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@SuppressWarnings("common-java:DuplicatedBlocks")
+public class GetDevicesHandler implements AsyncMethodCallback<Set<String>> {
+
+ private static final Logger logger =
LoggerFactory.getLogger(GetDevicesHandler.class);
+
+ private Node contact;
+ private AtomicReference<Set<String>> result;
+
+ @Override
+ public void onComplete(Set<String> resp) {
+ logger.info("Received devices schema from {}", contact);
Review comment:
Maybe `info` is too high for this
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