[GitHub] [incubator-iotdb] LebronAl commented on a change in pull request #1691: [IOTDB-814] Cache and redirect distributed IoTDB's leader for write requests in IoTDB's client

[GitBox <gi...@apache.org>]

LebronAl commented on a change in pull request #1691:
URL: https://github.com/apache/incubator-iotdb/pull/1691#discussion_r486860025



##########
File path: session/src/main/java/org/apache/iotdb/session/SessionConnection.java
##########
@@ -0,0 +1,401 @@
+/*
+ * 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.session;
+
+import java.time.ZoneId;
+import java.util.List;
+import org.apache.iotdb.rpc.IoTDBConnectionException;
+import org.apache.iotdb.rpc.RedirectException;
+import org.apache.iotdb.rpc.RpcUtils;
+import org.apache.iotdb.rpc.StatementExecutionException;
+import org.apache.iotdb.service.rpc.thrift.EndPoint;
+import org.apache.iotdb.service.rpc.thrift.TSCloseSessionReq;
+import org.apache.iotdb.service.rpc.thrift.TSCreateMultiTimeseriesReq;
+import org.apache.iotdb.service.rpc.thrift.TSCreateTimeseriesReq;
+import org.apache.iotdb.service.rpc.thrift.TSDeleteDataReq;
+import org.apache.iotdb.service.rpc.thrift.TSExecuteStatementReq;
+import org.apache.iotdb.service.rpc.thrift.TSExecuteStatementResp;
+import org.apache.iotdb.service.rpc.thrift.TSGetTimeZoneResp;
+import org.apache.iotdb.service.rpc.thrift.TSIService;
+import org.apache.iotdb.service.rpc.thrift.TSInsertRecordReq;
+import org.apache.iotdb.service.rpc.thrift.TSInsertRecordsReq;
+import org.apache.iotdb.service.rpc.thrift.TSInsertStringRecordReq;
+import org.apache.iotdb.service.rpc.thrift.TSInsertStringRecordsReq;
+import org.apache.iotdb.service.rpc.thrift.TSInsertTabletReq;
+import org.apache.iotdb.service.rpc.thrift.TSInsertTabletsReq;
+import org.apache.iotdb.service.rpc.thrift.TSOpenSessionReq;
+import org.apache.iotdb.service.rpc.thrift.TSOpenSessionResp;
+import org.apache.iotdb.service.rpc.thrift.TSRawDataQueryReq;
+import org.apache.iotdb.service.rpc.thrift.TSSetTimeZoneReq;
+import org.apache.iotdb.service.rpc.thrift.TSStatus;
+import org.apache.thrift.TException;
+import org.apache.thrift.protocol.TBinaryProtocol;
+import org.apache.thrift.protocol.TCompactProtocol;
+import org.apache.thrift.transport.TFastFramedTransport;
+import org.apache.thrift.transport.TSocket;
+import org.apache.thrift.transport.TTransport;
+import org.apache.thrift.transport.TTransportException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class SessionConnection {
+
+  private static final Logger logger = LoggerFactory.getLogger(SessionConnection.class);
+  private Session session;
+  private TTransport transport;
+  private TSIService.Iface client;
+  private long sessionId;
+  private long statementId;
+  private ZoneId zoneId;
+
+  public SessionConnection(Session session, EndPoint endPoint) throws IoTDBConnectionException {
+    this.session = session;
+    init(endPoint);
+  }
+
+  private void init(EndPoint endPoint) throws IoTDBConnectionException {
+    transport = new TFastFramedTransport(
+        new TSocket(endPoint.getIp(), endPoint.getPort(), session.connectionTimeoutInMs));
+
+    if (!transport.isOpen()) {
+      try {
+        transport.open();
+      } catch (TTransportException e) {
+        throw new IoTDBConnectionException(e);
+      }
+    }
+
+    if (session.enableRPCCompression) {
+      client = new TSIService.Client(new TCompactProtocol(transport));
+    } else {
+      client = new TSIService.Client(new TBinaryProtocol(transport));
+    }
+
+    TSOpenSessionReq openReq = new TSOpenSessionReq();
+    openReq.setUsername(session.username);
+    openReq.setPassword(session.password);
+
+    try {
+      TSOpenSessionResp openResp = client.openSession(openReq);
+
+      RpcUtils.verifySuccess(openResp.getStatus());
+
+      if (session.protocolVersion.getValue() != openResp.getServerProtocolVersion().getValue()) {
+        logger.warn("Protocol differ, Client version is {}}, but Server version is {}",
+            session.protocolVersion.getValue(), openResp.getServerProtocolVersion().getValue());
+        if (openResp.getServerProtocolVersion().getValue() == 0) {// less than 0.10
+          throw new TException(String
+              .format("Protocol not supported, Client version is %s, but Server version is %s",
+                  session.protocolVersion.getValue(),
+                  openResp.getServerProtocolVersion().getValue()));
+        }
+      }
+
+      sessionId = openResp.getSessionId();
+      statementId = client.requestStatementId(sessionId);
+
+      if (zoneId != null) {
+        setTimeZone(zoneId.toString());
+      } else {
+        zoneId = ZoneId.of(getTimeZone());
+      }
+
+    } catch (Exception e) {
+      transport.close();
+      throw new IoTDBConnectionException(e);
+    }
+  }
+
+
+  public void close() throws IoTDBConnectionException {
+    TSCloseSessionReq req = new TSCloseSessionReq(sessionId);
+    try {
+      client.closeSession(req);
+    } catch (TException e) {
+      throw new IoTDBConnectionException(
+          "Error occurs when closing session at server. Maybe server is down.", e);
+    } finally {
+      if (transport != null) {
+        transport.close();
+      }
+    }
+  }
+
+  protected void setTimeZone(String zoneId)
+      throws StatementExecutionException, IoTDBConnectionException {
+    TSSetTimeZoneReq req = new TSSetTimeZoneReq(sessionId, zoneId);
+    TSStatus resp;
+    try {
+      resp = client.setTimeZone(req);
+    } catch (TException e) {
+      throw new IoTDBConnectionException(e);
+    }
+    RpcUtils.verifySuccess(resp);
+    this.zoneId = ZoneId.of(zoneId);
+  }
+
+  protected String getTimeZone()
+      throws StatementExecutionException, IoTDBConnectionException {
+    if (zoneId != null) {
+      return zoneId.toString();
+    }
+    TSGetTimeZoneResp resp;
+    try {
+      resp = client.getTimeZone(sessionId);
+    } catch (TException e) {
+      throw new IoTDBConnectionException(e);
+    }
+    RpcUtils.verifySuccess(resp.getStatus());
+    return resp.getTimeZone();
+  }
+
+  protected void setStorageGroup(String storageGroup)
+      throws IoTDBConnectionException, StatementExecutionException, RedirectException {
+    try {
+      RpcUtils.verifySuccessWithRedirection(client.setStorageGroup(sessionId, storageGroup));
+    } catch (TException e) {
+      throw new IoTDBConnectionException(e);
+    }
+  }
+
+  protected void deleteStorageGroups(List<String> storageGroups)
+      throws IoTDBConnectionException, StatementExecutionException, RedirectException {
+    try {
+      RpcUtils.verifySuccessWithRedirection(client.deleteStorageGroups(sessionId, storageGroups));
+    } catch (TException e) {
+      throw new IoTDBConnectionException(e);
+    }
+  }
+
+  protected void createTimeseries(TSCreateTimeseriesReq request)
+      throws IoTDBConnectionException, StatementExecutionException {
+    request.setSessionId(sessionId);
+    try {
+      RpcUtils.verifySuccess(client.createTimeseries(request));
+    } catch (TException e) {
+      throw new IoTDBConnectionException(e);
+    }
+  }
+
+  protected void createMultiTimeseries(TSCreateMultiTimeseriesReq request)
+      throws IoTDBConnectionException, StatementExecutionException {
+    request.setSessionId(sessionId);
+    try {
+      RpcUtils.verifySuccess(client.createMultiTimeseries(request));
+    } catch (TException e) {
+      throw new IoTDBConnectionException(e);
+    }
+  }
+
+  protected boolean checkTimeseriesExists(String path)
+      throws IoTDBConnectionException, StatementExecutionException {
+    SessionDataSet dataSet = executeQueryStatement(String.format("SHOW TIMESERIES %s", path));
+    boolean result = dataSet.hasNext();
+    dataSet.closeOperationHandle();

Review comment:
       OK~




----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

For queries about this service, please contact Infrastructure at:
users@infra.apache.org