jt2594838 commented on code in PR #17869:
URL: https://github.com/apache/iotdb/pull/17869#discussion_r3860546066


##########
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/receiver/protocol/thrift/IoTDBDataNodeReceiver.java:
##########
@@ -1126,6 +1162,122 @@ protected TSStatus 
getReceiverTemporaryUnavailableStatus(
                 
PipeDataNodeResourceManager.memory().getTotalNonFloatingMemorySizeInBytes()));
   }
 
+  private TPipeTransferResp recordDataNodeHandshakeIfSuccess(
+      final TPipeTransferResp resp, final TPipeTransferReq req) {
+    if (isSuccess(resp)) {
+      recordPipeReceiverHandshake(
+          PipeReceiverRuntimeRegistry.NODE_TYPE_DATA_NODE,
+          IOTDB_CONFIG.getDataNodeId(),
+          getProtocol(req));
+    }
+    return resp;
+  }
+
+  private TPipeTransferResp recordDataNodeTransferIfSuccess(final 
TPipeTransferResp resp) {
+    if (isSuccess(resp)) {
+      recordPipeReceiverTransfer();
+    }
+    return resp;
+  }
+
+  private TPipeTransferResp recordConfigNodeReceiverRuntimeIfSuccess(
+      final Pair<TPipeTransferResp, Integer> respWithReceiverNodeId, final 
TPipeTransferReq req) {
+    final TPipeTransferResp resp = respWithReceiverNodeId.left;
+    if (!PipeRequestType.isValidatedRequestType(req.getType())) {
+      return resp;
+    }
+
+    final PipeRequestType requestType = PipeRequestType.valueOf(req.getType());
+    if (requestType == PipeRequestType.HANDSHAKE_CONFIGNODE_V1
+        || requestType == PipeRequestType.HANDSHAKE_CONFIGNODE_V2) {
+      if (isSuccess(resp)) {
+        recordConfigNodeHandshake(req, requestType, 
respWithReceiverNodeId.right);
+      }
+    } else {
+      if (isSuccess(resp)) {
+        PipeReceiverRuntimeRegistry.getInstance()
+            .markTransfer(configPipeReceiverRuntimeSessionKey.get(), 
System.currentTimeMillis());
+      }
+    }
+    return resp;
+  }

Review Comment:
   The return value is fixed. Is it necessary?



##########
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/receiver/protocol/thrift/IoTDBDataNodeReceiver.java:
##########
@@ -1126,6 +1162,122 @@ protected TSStatus 
getReceiverTemporaryUnavailableStatus(
                 
PipeDataNodeResourceManager.memory().getTotalNonFloatingMemorySizeInBytes()));
   }
 
+  private TPipeTransferResp recordDataNodeHandshakeIfSuccess(
+      final TPipeTransferResp resp, final TPipeTransferReq req) {
+    if (isSuccess(resp)) {
+      recordPipeReceiverHandshake(
+          PipeReceiverRuntimeRegistry.NODE_TYPE_DATA_NODE,
+          IOTDB_CONFIG.getDataNodeId(),
+          getProtocol(req));
+    }
+    return resp;
+  }
+
+  private TPipeTransferResp recordDataNodeTransferIfSuccess(final 
TPipeTransferResp resp) {
+    if (isSuccess(resp)) {
+      recordPipeReceiverTransfer();
+    }
+    return resp;
+  }
+
+  private TPipeTransferResp recordConfigNodeReceiverRuntimeIfSuccess(
+      final Pair<TPipeTransferResp, Integer> respWithReceiverNodeId, final 
TPipeTransferReq req) {
+    final TPipeTransferResp resp = respWithReceiverNodeId.left;
+    if (!PipeRequestType.isValidatedRequestType(req.getType())) {
+      return resp;
+    }
+
+    final PipeRequestType requestType = PipeRequestType.valueOf(req.getType());
+    if (requestType == PipeRequestType.HANDSHAKE_CONFIGNODE_V1
+        || requestType == PipeRequestType.HANDSHAKE_CONFIGNODE_V2) {
+      if (isSuccess(resp)) {
+        recordConfigNodeHandshake(req, requestType, 
respWithReceiverNodeId.right);
+      }
+    } else {
+      if (isSuccess(resp)) {
+        PipeReceiverRuntimeRegistry.getInstance()
+            .markTransfer(configPipeReceiverRuntimeSessionKey.get(), 
System.currentTimeMillis());
+      }
+    }
+    return resp;
+  }
+
+  private void recordConfigNodeHandshake(
+      final TPipeTransferReq req, final PipeRequestType requestType, final int 
receiverNodeId) {
+    final String protocol = getProtocol(req);
+    final String sessionKey =
+        String.format(
+            "%s-%s-%s-%s",
+            PipeReceiverRuntimeRegistry.NODE_TYPE_CONFIG_NODE,
+            receiverNodeId,
+            protocol,
+            getConfigReceiverId());
+    final String oldSessionKey = 
configPipeReceiverRuntimeSessionKey.getAndSet(sessionKey);
+    if (!Objects.equals(oldSessionKey, sessionKey)) {
+      PipeReceiverRuntimeRegistry.getInstance().deregister(oldSessionKey);
+    }
+
+    final Map<String, String> params =
+        requestType == PipeRequestType.HANDSHAKE_CONFIGNODE_V2
+            ? parseHandshakeV2Params(req)
+            : Collections.emptyMap();
+    PipeReceiverRuntimeRegistry.getInstance()
+        .registerOrUpdateSession(
+            sessionKey,
+            PipeReceiverRuntimeRegistry.NODE_TYPE_CONFIG_NODE,
+            receiverNodeId,
+            protocol,
+            getSenderHost(),
+            parseSenderPort(getSenderPort()),

Review Comment:
   Why are both needed.



##########
integration-test/src/test/java/org/apache/iotdb/pipe/it/dual/treemodel/auto/basic/IoTDBShowReceiversLifecycleIT.java:
##########
@@ -0,0 +1,379 @@
+/*
+ * 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.pipe.it.dual.treemodel.auto.basic;
+
+import org.apache.iotdb.common.rpc.thrift.TSStatus;
+import org.apache.iotdb.commons.client.sync.SyncConfigNodeIServiceClient;
+import org.apache.iotdb.confignode.rpc.thrift.TCreatePipeReq;
+import org.apache.iotdb.db.it.utils.TestUtils;
+import org.apache.iotdb.isession.SessionConfig;
+import org.apache.iotdb.it.env.cluster.node.DataNodeWrapper;
+import org.apache.iotdb.it.framework.IoTDBTestRunner;
+import org.apache.iotdb.itbase.category.MultiClusterIT2DualTreeAutoBasic;
+import org.apache.iotdb.itbase.env.BaseEnv;
+import 
org.apache.iotdb.pipe.it.dual.treemodel.auto.AbstractPipeDualTreeModelAutoIT;
+import org.apache.iotdb.rpc.TSStatusCode;
+
+import org.awaitility.Awaitility;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.junit.runner.RunWith;
+
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+@RunWith(IoTDBTestRunner.class)
+@Category({MultiClusterIT2DualTreeAutoBasic.class})
+public class IoTDBShowReceiversLifecycleIT extends 
AbstractPipeDualTreeModelAutoIT {
+
+  @Override
+  protected void setupConfig() {
+    super.setupConfig();
+    senderEnv.getConfig().getCommonConfig().setPipeAirGapReceiverEnabled(true);
+    
receiverEnv.getConfig().getCommonConfig().setPipeAirGapReceiverEnabled(true);
+  }
+
+  @Test
+  public void testShowReceiversPipeIdsDisappearAfterDropPipe() throws 
Exception {
+    final String database = "root.show_receivers_lifecycle";
+    final String pipeName = "show_receivers_lifecycle_pipe";
+
+    createThriftPipe(database, pipeName);
+
+    assertShowReceivers("show receivers", BaseEnv.TREE_SQL_DIALECT, pipeName);
+    assertShowReceivers(
+        "select * from information_schema.receivers", 
BaseEnv.TABLE_SQL_DIALECT, pipeName);

Review Comment:
   Why can a tree pipe be shown in the table model?



##########
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/receiver/protocol/thrift/IoTDBDataNodeReceiver.java:
##########
@@ -1126,6 +1162,122 @@ protected TSStatus 
getReceiverTemporaryUnavailableStatus(
                 
PipeDataNodeResourceManager.memory().getTotalNonFloatingMemorySizeInBytes()));
   }
 
+  private TPipeTransferResp recordDataNodeHandshakeIfSuccess(
+      final TPipeTransferResp resp, final TPipeTransferReq req) {
+    if (isSuccess(resp)) {
+      recordPipeReceiverHandshake(
+          PipeReceiverRuntimeRegistry.NODE_TYPE_DATA_NODE,
+          IOTDB_CONFIG.getDataNodeId(),
+          getProtocol(req));
+    }
+    return resp;
+  }
+
+  private TPipeTransferResp recordDataNodeTransferIfSuccess(final 
TPipeTransferResp resp) {
+    if (isSuccess(resp)) {
+      recordPipeReceiverTransfer();
+    }
+    return resp;
+  }
+
+  private TPipeTransferResp recordConfigNodeReceiverRuntimeIfSuccess(
+      final Pair<TPipeTransferResp, Integer> respWithReceiverNodeId, final 
TPipeTransferReq req) {
+    final TPipeTransferResp resp = respWithReceiverNodeId.left;
+    if (!PipeRequestType.isValidatedRequestType(req.getType())) {
+      return resp;
+    }
+
+    final PipeRequestType requestType = PipeRequestType.valueOf(req.getType());
+    if (requestType == PipeRequestType.HANDSHAKE_CONFIGNODE_V1
+        || requestType == PipeRequestType.HANDSHAKE_CONFIGNODE_V2) {
+      if (isSuccess(resp)) {
+        recordConfigNodeHandshake(req, requestType, 
respWithReceiverNodeId.right);
+      }
+    } else {
+      if (isSuccess(resp)) {
+        PipeReceiverRuntimeRegistry.getInstance()
+            .markTransfer(configPipeReceiverRuntimeSessionKey.get(), 
System.currentTimeMillis());
+      }
+    }
+    return resp;
+  }
+
+  private void recordConfigNodeHandshake(
+      final TPipeTransferReq req, final PipeRequestType requestType, final int 
receiverNodeId) {
+    final String protocol = getProtocol(req);
+    final String sessionKey =
+        String.format(
+            "%s-%s-%s-%s",
+            PipeReceiverRuntimeRegistry.NODE_TYPE_CONFIG_NODE,
+            receiverNodeId,
+            protocol,
+            getConfigReceiverId());
+    final String oldSessionKey = 
configPipeReceiverRuntimeSessionKey.getAndSet(sessionKey);
+    if (!Objects.equals(oldSessionKey, sessionKey)) {
+      PipeReceiverRuntimeRegistry.getInstance().deregister(oldSessionKey);
+    }
+
+    final Map<String, String> params =
+        requestType == PipeRequestType.HANDSHAKE_CONFIGNODE_V2
+            ? parseHandshakeV2Params(req)
+            : Collections.emptyMap();
+    PipeReceiverRuntimeRegistry.getInstance()
+        .registerOrUpdateSession(
+            sessionKey,
+            PipeReceiverRuntimeRegistry.NODE_TYPE_CONFIG_NODE,
+            receiverNodeId,
+            protocol,
+            getSenderHost(),
+            parseSenderPort(getSenderPort()),
+            
params.getOrDefault(PipeTransferHandshakeConstant.HANDSHAKE_KEY_USERNAME, 
username),
+            params.getOrDefault(
+                PipeTransferHandshakeConstant.HANDSHAKE_KEY_CLUSTER_ID,
+                PipeReceiverRuntimeRegistry.UNKNOWN),
+            params.get(PipeTransferHandshakeConstant.HANDSHAKE_KEY_PIPE_NAME),
+            parsePipeCreationTime(
+                
params.get(PipeTransferHandshakeConstant.HANDSHAKE_KEY_PIPE_CREATION_TIME)),
+            System.currentTimeMillis());
+  }
+
+  private static Map<String, String> parseHandshakeV2Params(final 
TPipeTransferReq req) {
+    final Map<String, String> params = new HashMap<>();
+    if (req.getBody() == null) {
+      return params;
+    }

Review Comment:
   Move the judgment to the very beginning and return Collections.emptyMap if 
the map will not be written later.



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