Support sink config key for pipe request slicing

Author: Caideyipi

integration-test/src/main/java/org/apache/iotdb/it/env/cluster/config/MppCommonConfig.java

@@ -538,7 +538,7 @@ public CommonConfig setPipeMetaSyncerSyncIntervalMinutes(long pipeMetaSyncerSync
   public CommonConfig setPipeConnectorRequestSliceThresholdBytes(
       int pipeConnectorRequestSliceThresholdBytes) {
     setProperty(
-        "pipe_connector_request_slice_threshold_bytes",
+        "pipe_sink_request_slice_threshold_bytes",
         String.valueOf(pipeConnectorRequestSliceThresholdBytes));
 
     return this;

iotdb-core/node-commons/src/main/java/org/apache/iotdb/commons/pipe/config/PipeDescriptor.java

@@ -437,9 +437,11 @@ public static void loadPipeInternalConfig(CommonConfig config, TrimProperties pr
 
     config.setPipeSinkRequestSliceThresholdBytes(
         Integer.parseInt(
-            properties.getProperty(
-                "pipe_connector_request_slice_threshold_bytes",
-                String.valueOf(config.getPipeSinkRequestSliceThresholdBytes()))));
+            Optional.ofNullable(properties.getProperty("pipe_sink_request_slice_threshold_bytes"))
+                .orElse(
+                    properties.getProperty(
+                        "pipe_connector_request_slice_threshold_bytes",
+                        String.valueOf(config.getPipeSinkRequestSliceThresholdBytes())))));
 
     config.setPipeReceiverLoginPeriodicVerificationIntervalMs(
         Long.parseLong(

iotdb-core/node-commons/src/test/java/org/apache/iotdb/commons/pipe/config/PipeDescriptorTest.java

@@ -0,0 +1,65 @@
+/*
+ * 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.commons.pipe.config;
+
+import org.apache.iotdb.commons.conf.CommonConfig;
+import org.apache.iotdb.commons.conf.CommonDescriptor;
+import org.apache.iotdb.commons.conf.TrimProperties;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+public class PipeDescriptorTest {
+
+  private final CommonConfig config = CommonDescriptor.getInstance().getConfig();
+
+  private int originalRequestSliceThresholdBytes;
+
+  @Before
+  public void setUp() {
+    originalRequestSliceThresholdBytes = config.getPipeSinkRequestSliceThresholdBytes();
+  }
+
+  @After
+  public void tearDown() {
+    config.setPipeSinkRequestSliceThresholdBytes(originalRequestSliceThresholdBytes);
+  }
+
+  @Test
+  public void testPipeRequestSliceThresholdSupportsSinkAndConnectorKeys() {
+    final TrimProperties connectorProperties = new TrimProperties();
+    connectorProperties.setProperty("pipe_connector_request_slice_threshold_bytes", "123");
+    PipeDescriptor.loadPipeInternalConfig(config, connectorProperties);
+    Assert.assertEquals(123, config.getPipeSinkRequestSliceThresholdBytes());
+
+    final TrimProperties sinkProperties = new TrimProperties();
+    sinkProperties.setProperty("pipe_sink_request_slice_threshold_bytes", "456");
+    PipeDescriptor.loadPipeInternalConfig(config, sinkProperties);
+    Assert.assertEquals(456, config.getPipeSinkRequestSliceThresholdBytes());
+
+    final TrimProperties bothProperties = new TrimProperties();
+    bothProperties.setProperty("pipe_connector_request_slice_threshold_bytes", "123");
+    bothProperties.setProperty("pipe_sink_request_slice_threshold_bytes", "456");
+    PipeDescriptor.loadPipeInternalConfig(config, bothProperties);
+    Assert.assertEquals(456, config.getPipeSinkRequestSliceThresholdBytes());
+  }
+}