Support processor output series aliases

Author: Caideyipi

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/processor/twostage/plugin/TwoStageCountProcessor.java

@@ -23,6 +23,7 @@
 import org.apache.iotdb.commons.consensus.index.ProgressIndex;
 import org.apache.iotdb.commons.consensus.index.impl.MinimumProgressIndex;
 import org.apache.iotdb.commons.consensus.index.impl.StateProgressIndex;
+import org.apache.iotdb.commons.exception.IllegalPathException;
 import org.apache.iotdb.commons.path.PartialPath;
 import org.apache.iotdb.commons.pipe.agent.task.meta.PipeTaskMeta;
 import org.apache.iotdb.commons.pipe.config.plugin.env.PipeTaskProcessorRuntimeEnvironment;
@@ -146,7 +147,7 @@ public void customize(PipeParameters parameters, PipeProcessorRuntimeConfigurati
       isTableModel = PathUtils.isTableModelDatabase(dataBaseName);
     }
 
-    outputSeries = new PartialPath(parameters.getString(_PROCESSOR_OUTPUT_SERIES_KEY));
+    outputSeries = parseOutputSeries(parameters);
 
     if (Objects.nonNull(pipeTaskMeta) && Objects.nonNull(pipeTaskMeta.getProgressIndex())) {
       if (pipeTaskMeta.getProgressIndex() instanceof MinimumProgressIndex) {
@@ -178,6 +179,12 @@ public void customize(PipeParameters parameters, PipeProcessorRuntimeConfigurati
     twoStageAggregateSender = new TwoStageAggregateSender(pipeName, creationTime);
   }
 
+  static PartialPath parseOutputSeries(final PipeParameters parameters)
+      throws IllegalPathException {
+    return new PartialPath(
+        parameters.getStringByKeys(PROCESSOR_OUTPUT_SERIES_KEY, _PROCESSOR_OUTPUT_SERIES_KEY));
+  }
+
   @Override
   public void process(TabletInsertionEvent tabletInsertionEvent, EventCollector eventCollector)
       throws Exception {

iotdb-core/datanode/src/test/java/org/apache/iotdb/db/pipe/processor/twostage/plugin/TwoStageCountProcessorTest.java

@@ -0,0 +1,44 @@
+/*
+ * 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.db.pipe.processor.twostage.plugin;
+
+import org.apache.iotdb.commons.path.PartialPath;
+import org.apache.iotdb.pipe.api.customizer.parameter.PipeParameters;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.Collections;
+
+public class TwoStageCountProcessorTest {
+
+  @Test
+  public void testOutputSeriesSupportsNewAndLegacyKeys() throws Exception {
+    Assert.assertEquals(
+        "root.db.d.s1", parseOutputSeries("processor.output.series", "root.db.d.s1").getFullPath());
+    Assert.assertEquals(
+        "root.db.d.s2", parseOutputSeries("processor.output-series", "root.db.d.s2").getFullPath());
+  }
+
+  private PartialPath parseOutputSeries(final String key, final String value) throws Exception {
+    return TwoStageCountProcessor.parseOutputSeries(
+        new PipeParameters(Collections.singletonMap(key, value)));
+  }
+}