[Improvement-3369][api] Introduce logger service interface for clear code (#3437)

* [Improvement][api] Introduce logger service interface for clear code

* Remove the code smell

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/controller/LoggerController.java

@@ -17,25 +17,34 @@
 package org.apache.dolphinscheduler.api.controller;
 
 
+import static org.apache.dolphinscheduler.api.enums.Status.DOWNLOAD_TASK_INSTANCE_LOG_FILE_ERROR;
+import static org.apache.dolphinscheduler.api.enums.Status.QUERY_TASK_INSTANCE_LOG_ERROR;
+
 import org.apache.dolphinscheduler.api.exceptions.ApiException;
 import org.apache.dolphinscheduler.api.service.LoggerService;
 import org.apache.dolphinscheduler.api.utils.Result;
 import org.apache.dolphinscheduler.common.Constants;
 import org.apache.dolphinscheduler.dao.entity.User;
-import io.swagger.annotations.Api;
+
-import io.swagger.annotations.ApiImplicitParam;
-import io.swagger.annotations.ApiImplicitParams;
-import io.swagger.annotations.ApiOperation;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.*;
+import org.springframework.web.bind.annotation.GetMapping;
-import springfox.documentation.annotations.ApiIgnore;
+import org.springframework.web.bind.annotation.RequestAttribute;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestController;
 
-import static org.apache.dolphinscheduler.api.enums.Status.*;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiImplicitParam;
+import io.swagger.annotations.ApiImplicitParams;
+import io.swagger.annotations.ApiOperation;
+import springfox.documentation.annotations.ApiIgnore;
 
 
 /**
@@ -70,7 +79,7 @@ public class LoggerController extends BaseController {
     @GetMapping(value = "/detail")
     @ResponseStatus(HttpStatus.OK)
     @ApiException(QUERY_TASK_INSTANCE_LOG_ERROR)
-    public Result queryLog(@ApiIgnore @RequestAttribute(value = Constants.SESSION_USER) User loginUser,
+    public Result<String> queryLog(@ApiIgnore @RequestAttribute(value = Constants.SESSION_USER) User loginUser,
                            @RequestParam(value = "taskInstanceId") int taskInstanceId,
                            @RequestParam(value = "skipLineNum") int skipNum,
                            @RequestParam(value = "limit") int limit) {

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/exceptions/ApiExceptionHandler.java

@@ -18,17 +18,18 @@ package org.apache.dolphinscheduler.api.exceptions;
 
 import org.apache.dolphinscheduler.api.enums.Status;
 import org.apache.dolphinscheduler.api.utils.Result;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
 import org.springframework.web.method.HandlerMethod;
 
 /**
  * Exception Handler
  */
-@ControllerAdvice
+@RestControllerAdvice
 @ResponseBody
 public class ApiExceptionHandler {
 

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/LoggerService.java

@@ -16,45 +16,12 @@
  */
 package org.apache.dolphinscheduler.api.service;
 
-import java.nio.charset.StandardCharsets;
-import javax.annotation.PreDestroy;
-import org.apache.commons.lang.ArrayUtils;
-import org.apache.dolphinscheduler.api.enums.Status;
 import org.apache.dolphinscheduler.api.utils.Result;
-import org.apache.dolphinscheduler.common.Constants;
-import org.apache.dolphinscheduler.common.utils.StringUtils;
-import org.apache.dolphinscheduler.dao.entity.TaskInstance;
-import org.apache.dolphinscheduler.remote.utils.Host;
-import org.apache.dolphinscheduler.service.log.LogClientService;
-import org.apache.dolphinscheduler.service.process.ProcessService;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Service;
 
 /**
  * log service
  */
-@Service
+public interface LoggerService {
-public class LoggerService {
-
-  private static final Logger logger = LoggerFactory.getLogger(LoggerService.class);
-
-  private static final String LOG_HEAD_FORMAT = "[LOG-PATH]: %s, [HOST]:  %s%s";
-
-  @Autowired
-  private ProcessService processService;
-
-  private final LogClientService logClient;
-
-  public LoggerService() {
-    logClient = new LogClientService();
-  }
-
-  @PreDestroy
-  public void close() {
-    logClient.close();
-  }
 
     /**
      * view log
@@ -64,36 +31,7 @@ public class LoggerService {
      * @param limit limit
      * @return log string data
      */
-  public Result queryLog(int taskInstId, int skipLineNum, int limit) {
+    Result<String> queryLog(int taskInstId, int skipLineNum, int limit);
-
-    TaskInstance taskInstance = processService.findTaskInstanceById(taskInstId);
-
-    if (taskInstance == null || StringUtils.isBlank(taskInstance.getHost())) {
-      return Result.error(Status.TASK_INSTANCE_NOT_FOUND);
-    }
-
-    String host = getHost(taskInstance.getHost());
-
-    Result result = new Result(Status.SUCCESS.getCode(), Status.SUCCESS.getMsg());
-
-    logger.info("log host : {} , logPath : {} , logServer port : {}", host, taskInstance.getLogPath(),
-            Constants.RPC_PORT);
-
-    StringBuilder log = new StringBuilder();
-    if (skipLineNum == 0) {
-      String head = String.format(LOG_HEAD_FORMAT,
-          taskInstance.getLogPath(),
-          host,
-          Constants.SYSTEM_LINE_SEPARATOR);
-      log.append(head);
-    }
-
-    log.append(logClient
-        .rollViewLog(host, Constants.RPC_PORT, taskInstance.getLogPath(), skipLineNum, limit));
-
-    result.setData(log);
-    return result;
-  }
 
 
     /**
@@ -102,31 +40,6 @@ public class LoggerService {
      * @param taskInstId task instance id
      * @return log byte array
      */
-  public byte[] getLogBytes(int taskInstId) {
+    byte[] getLogBytes(int taskInstId);
-    TaskInstance taskInstance = processService.findTaskInstanceById(taskInstId);
-    if (taskInstance == null || StringUtils.isBlank(taskInstance.getHost())) {
-      throw new RuntimeException("task instance is null or host is null");
-    }
-    String host = getHost(taskInstance.getHost());
-    byte[] head = String.format(LOG_HEAD_FORMAT,
-        taskInstance.getLogPath(),
-        host,
-        Constants.SYSTEM_LINE_SEPARATOR).getBytes(StandardCharsets.UTF_8);
-    return ArrayUtils.addAll(head,
-        logClient.getLogBytes(host, Constants.RPC_PORT, taskInstance.getLogPath()));
-  }
 
-
-  /**
-   * get host
-   *
-   * @param address address
-   * @return old version return true ,otherwise return false
-   */
-  private String getHost(String address) {
-    if (Host.isOldVersion(address)) {
-      return address;
-    }
-    return Host.of(address).getIp();
-  }
 }

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/LoggerServiceImpl.java

@@ -0,0 +1,146 @@
+/*
+ * 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.dolphinscheduler.api.service.impl;
+
+import org.apache.dolphinscheduler.api.enums.Status;
+import org.apache.dolphinscheduler.api.exceptions.ServiceException;
+import org.apache.dolphinscheduler.api.service.LoggerService;
+import org.apache.dolphinscheduler.api.utils.Result;
+import org.apache.dolphinscheduler.common.Constants;
+import org.apache.dolphinscheduler.common.utils.StringUtils;
+import org.apache.dolphinscheduler.dao.entity.TaskInstance;
+import org.apache.dolphinscheduler.remote.utils.Host;
+import org.apache.dolphinscheduler.service.log.LogClientService;
+import org.apache.dolphinscheduler.service.process.ProcessService;
+
+import org.apache.commons.lang.ArrayUtils;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+
+import javax.annotation.PostConstruct;
+import javax.annotation.PreDestroy;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+/**
+ * log service
+ */
+@Service
+public class LoggerServiceImpl implements LoggerService {
+
+    private static final Logger logger = LoggerFactory.getLogger(LoggerServiceImpl.class);
+
+    private static final String LOG_HEAD_FORMAT = "[LOG-PATH]: %s, [HOST]:  %s%s";
+
+    @Autowired
+    private ProcessService processService;
+
+    private LogClientService logClient;
+
+    @PostConstruct
+    public void init() {
+        if (Objects.isNull(this.logClient)) {
+            this.logClient = new LogClientService();
+        }
+    }
+
+    @PreDestroy
+    public void close() {
+        if (Objects.nonNull(this.logClient) && this.logClient.isRunning()) {
+            logClient.close();
+        }
+    }
+
+    /**
+     * view log
+     *
+     * @param taskInstId task instance id
+     * @param skipLineNum skip line number
+     * @param limit limit
+     * @return log string data
+     */
+    @SuppressWarnings("unchecked")
+    public Result<String> queryLog(int taskInstId, int skipLineNum, int limit) {
+
+        TaskInstance taskInstance = processService.findTaskInstanceById(taskInstId);
+
+        if (taskInstance == null || StringUtils.isBlank(taskInstance.getHost())) {
+            return Result.error(Status.TASK_INSTANCE_NOT_FOUND);
+        }
+
+        String host = getHost(taskInstance.getHost());
+
+        Result<String> result = new Result<>(Status.SUCCESS.getCode(), Status.SUCCESS.getMsg());
+
+        logger.info("log host : {} , logPath : {} , logServer port : {}", host, taskInstance.getLogPath(),
+                Constants.RPC_PORT);
+
+        StringBuilder log = new StringBuilder();
+        if (skipLineNum == 0) {
+            String head = String.format(LOG_HEAD_FORMAT,
+                    taskInstance.getLogPath(),
+                    host,
+                    Constants.SYSTEM_LINE_SEPARATOR);
+            log.append(head);
+        }
+
+        log.append(logClient
+                .rollViewLog(host, Constants.RPC_PORT, taskInstance.getLogPath(), skipLineNum, limit));
+
+        result.setData(log.toString());
+        return result;
+    }
+
+
+    /**
+     * get log size
+     *
+     * @param taskInstId task instance id
+     * @return log byte array
+     */
+    public byte[] getLogBytes(int taskInstId) {
+        TaskInstance taskInstance = processService.findTaskInstanceById(taskInstId);
+        if (taskInstance == null || StringUtils.isBlank(taskInstance.getHost())) {
+            throw new ServiceException("task instance is null or host is null");
+        }
+        String host = getHost(taskInstance.getHost());
+        byte[] head = String.format(LOG_HEAD_FORMAT,
+                taskInstance.getLogPath(),
+                host,
+                Constants.SYSTEM_LINE_SEPARATOR).getBytes(StandardCharsets.UTF_8);
+        return ArrayUtils.addAll(head,
+                logClient.getLogBytes(host, Constants.RPC_PORT, taskInstance.getLogPath()));
+    }
+
+
+    /**
+     * get host
+     *
+     * @param address address
+     * @return old version return true ,otherwise return false
+     */
+    private String getHost(String address) {
+        if (Boolean.TRUE.equals(Host.isOldVersion(address))) {
+            return address;
+        }
+        return Host.of(address).getIp();
+    }
+}

dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/LoggerServiceTest.java

@@ -17,10 +17,14 @@
 package org.apache.dolphinscheduler.api.service;
 
 import org.apache.dolphinscheduler.api.enums.Status;
+import org.apache.dolphinscheduler.api.service.impl.LoggerServiceImpl;
 import org.apache.dolphinscheduler.api.utils.Result;
 import org.apache.dolphinscheduler.dao.entity.TaskInstance;
 import org.apache.dolphinscheduler.service.process.ProcessService;
+
+import org.junit.After;
 import org.junit.Assert;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.InjectMocks;
@@ -32,25 +36,30 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 @RunWith(MockitoJUnitRunner.class)
-@PrepareForTest({LoggerService.class})
+@PrepareForTest({LoggerServiceImpl.class})
 public class LoggerServiceTest {
 
     private static final Logger logger = LoggerFactory.getLogger(LoggerServiceTest.class);
 
     @InjectMocks
-    private LoggerService loggerService;
+    private LoggerServiceImpl loggerService;
     @Mock
     private ProcessService processService;
 
+    @Before
+    public void init() {
+        this.loggerService.init();
+    }
+
 
     @Test
-    public void testQueryDataSourceList(){
+    public void testQueryDataSourceList() {
 
         TaskInstance taskInstance = new TaskInstance();
         Mockito.when(processService.findTaskInstanceById(1)).thenReturn(taskInstance);
-        Result result = loggerService.queryLog(2,1,1);
+        Result result = loggerService.queryLog(2, 1, 1);
         //TASK_INSTANCE_NOT_FOUND
-        Assert.assertEquals(Status.TASK_INSTANCE_NOT_FOUND.getCode(),result.getCode().intValue());
+        Assert.assertEquals(Status.TASK_INSTANCE_NOT_FOUND.getCode(), result.getCode().intValue());
 
         try {
             //HOST NOT FOUND OR ILLEGAL
@@ -59,36 +68,36 @@ public class LoggerServiceTest {
             Assert.assertTrue(true);
             logger.error("testQueryDataSourceList error {}", e.getMessage());
         }
-        Assert.assertEquals(Status.TASK_INSTANCE_NOT_FOUND.getCode(),result.getCode().intValue());
+        Assert.assertEquals(Status.TASK_INSTANCE_NOT_FOUND.getCode(), result.getCode().intValue());
 
         //SUCCESS
         taskInstance.setHost("127.0.0.1:8080");
         taskInstance.setLogPath("/temp/log");
         Mockito.when(processService.findTaskInstanceById(1)).thenReturn(taskInstance);
-        result = loggerService.queryLog(1,1,1);
+        result = loggerService.queryLog(1, 1, 1);
-        Assert.assertEquals(Status.SUCCESS.getCode(),result.getCode().intValue());
+        Assert.assertEquals(Status.SUCCESS.getCode(), result.getCode().intValue());
     }
 
     @Test
-    public void testGetLogBytes(){
+    public void testGetLogBytes() {
 
         TaskInstance taskInstance = new TaskInstance();
         Mockito.when(processService.findTaskInstanceById(1)).thenReturn(taskInstance);
 
         //task instance is null
-        try{
+        try {
             loggerService.getLogBytes(2);
-        }catch (RuntimeException e){
+        } catch (RuntimeException e) {
             Assert.assertTrue(true);
-            logger.error("testGetLogBytes error: {}","task instance is null");
+            logger.error("testGetLogBytes error: {}", "task instance is null");
         }
 
         //task instance host is null
-        try{
+        try {
             loggerService.getLogBytes(1);
-        }catch (RuntimeException e){
+        } catch (RuntimeException e) {
             Assert.assertTrue(true);
-            logger.error("testGetLogBytes error: {}","task instance host is null");
+            logger.error("testGetLogBytes error: {}", "task instance host is null");
         }
 
         //success
@@ -100,4 +109,9 @@ public class LoggerServiceTest {
 
     }
 
+    @After
+    public void close() {
+        this.loggerService.close();
+    }
+
 }

dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/ProcessInstanceServiceTest.java

@@ -16,16 +16,43 @@
  */
 package org.apache.dolphinscheduler.api.service;
 
-import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.when;
+
 import org.apache.dolphinscheduler.api.ApiApplicationServer;
 import org.apache.dolphinscheduler.api.enums.Status;
+import org.apache.dolphinscheduler.api.service.impl.LoggerServiceImpl;
 import org.apache.dolphinscheduler.api.utils.Result;
 import org.apache.dolphinscheduler.common.Constants;
-import org.apache.dolphinscheduler.common.enums.*;
+import org.apache.dolphinscheduler.common.enums.CommandType;
+import org.apache.dolphinscheduler.common.enums.DependResult;
+import org.apache.dolphinscheduler.common.enums.ExecutionStatus;
+import org.apache.dolphinscheduler.common.enums.Flag;
+import org.apache.dolphinscheduler.common.enums.TaskType;
+import org.apache.dolphinscheduler.common.enums.UserType;
 import org.apache.dolphinscheduler.common.utils.DateUtils;
-import org.apache.dolphinscheduler.dao.entity.*;
+import org.apache.dolphinscheduler.dao.entity.ProcessDefinition;
-import org.apache.dolphinscheduler.dao.mapper.*;
+import org.apache.dolphinscheduler.dao.entity.ProcessInstance;
+import org.apache.dolphinscheduler.dao.entity.Project;
+import org.apache.dolphinscheduler.dao.entity.TaskInstance;
+import org.apache.dolphinscheduler.dao.entity.Tenant;
+import org.apache.dolphinscheduler.dao.entity.User;
+import org.apache.dolphinscheduler.dao.entity.WorkerGroup;
+import org.apache.dolphinscheduler.dao.mapper.ProcessDefinitionMapper;
+import org.apache.dolphinscheduler.dao.mapper.ProcessInstanceMapper;
+import org.apache.dolphinscheduler.dao.mapper.ProjectMapper;
+import org.apache.dolphinscheduler.dao.mapper.TaskInstanceMapper;
 import org.apache.dolphinscheduler.service.process.ProcessService;
+
+import java.io.IOException;
+import java.text.MessageFormat;
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
 import org.junit.Assert;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -33,22 +60,13 @@ import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.Mockito;
 import org.mockito.junit.MockitoJUnitRunner;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.boot.test.context.SpringBootTest;
 
-import java.io.IOException;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
-import java.text.MessageFormat;
-import java.text.ParseException;
-import java.util.*;
-
-import static org.mockito.ArgumentMatchers.eq;
-import static org.mockito.Mockito.when;
 
 @RunWith(MockitoJUnitRunner.Silent.class)
 @SpringBootTest(classes = ApiApplicationServer.class)
 public class ProcessInstanceServiceTest {
-    private static final Logger logger = LoggerFactory.getLogger(ProcessInstanceServiceTest.class);
 
     @InjectMocks
     ProcessInstanceService processInstanceService;
@@ -78,9 +96,7 @@ public class ProcessInstanceServiceTest {
     TaskInstanceMapper taskInstanceMapper;
 
     @Mock
-    LoggerService loggerService;
+    LoggerServiceImpl loggerService;
-
-
 
     @Mock
     UsersService usersService;
@@ -153,16 +169,16 @@ public class ProcessInstanceServiceTest {
         User loginUser = getAdminUser();
         Map<String, Object> result = new HashMap<>(5);
         putMsg(result, Status.PROJECT_NOT_FOUNT, projectName);
-        int size=10;
+        int size = 10;
-        String startTime="2020-01-01 00:00:00";
+        String startTime = "2020-01-01 00:00:00";
-        String endTime="2020-08-02 00:00:00";
+        String endTime = "2020-08-02 00:00:00";
         Date start = DateUtils.getScheduleDate(startTime);
         Date end = DateUtils.getScheduleDate(endTime);
 
         //project auth fail
         when(projectMapper.queryByName(projectName)).thenReturn(null);
         when(projectService.checkProjectAndAuth(loginUser, null, projectName)).thenReturn(result);
-        Map<String, Object> proejctAuthFailRes = processInstanceService.queryTopNLongestRunningProcessInstance(loginUser,projectName,size,startTime,endTime);
+        Map<String, Object> proejctAuthFailRes = processInstanceService.queryTopNLongestRunningProcessInstance(loginUser, projectName, size, startTime, endTime);
         Assert.assertEquals(Status.PROJECT_NOT_FOUNT, proejctAuthFailRes.get(Constants.STATUS));
 
         //project auth success
@@ -176,7 +192,7 @@ public class ProcessInstanceServiceTest {
         when(usersService.queryUser(loginUser.getId())).thenReturn(loginUser);
         when(usersService.getUserIdByName(loginUser.getUserName())).thenReturn(loginUser.getId());
         when(usersService.queryUser(processInstance.getExecutorId())).thenReturn(loginUser);
-        Map<String, Object> successRes = processInstanceService.queryTopNLongestRunningProcessInstance(loginUser,projectName,size,startTime,endTime);
+        Map<String, Object> successRes = processInstanceService.queryTopNLongestRunningProcessInstance(loginUser, projectName, size, startTime, endTime);
 
         Assert.assertEquals(Status.SUCCESS, successRes.get(Constants.STATUS));
     }

dolphinscheduler-service/src/main/java/org/apache/dolphinscheduler/service/log/LogClientService.java

@@ -16,13 +16,20 @@
  */
 package org.apache.dolphinscheduler.service.log;
 
-import org.apache.dolphinscheduler.common.utils.JSONUtils;
 import org.apache.dolphinscheduler.remote.NettyRemotingClient;
 import org.apache.dolphinscheduler.remote.command.Command;
-import org.apache.dolphinscheduler.remote.command.log.*;
+import org.apache.dolphinscheduler.remote.command.log.GetLogBytesRequestCommand;
+import org.apache.dolphinscheduler.remote.command.log.GetLogBytesResponseCommand;
+import org.apache.dolphinscheduler.remote.command.log.RemoveTaskLogRequestCommand;
+import org.apache.dolphinscheduler.remote.command.log.RemoveTaskLogResponseCommand;
+import org.apache.dolphinscheduler.remote.command.log.RollViewLogRequestCommand;
+import org.apache.dolphinscheduler.remote.command.log.RollViewLogResponseCommand;
+import org.apache.dolphinscheduler.remote.command.log.ViewLogRequestCommand;
+import org.apache.dolphinscheduler.remote.command.log.ViewLogResponseCommand;
 import org.apache.dolphinscheduler.remote.config.NettyClientConfig;
 import org.apache.dolphinscheduler.remote.utils.Host;
 import org.apache.dolphinscheduler.remote.utils.JsonSerializer;
+
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -38,6 +45,8 @@ public class LogClientService {
 
     private final NettyRemotingClient client;
 
+    private volatile boolean isRunning;
+
     /**
      * request time out
      */
@@ -50,6 +59,7 @@ public class LogClientService {
         this.clientConfig = new NettyClientConfig();
         this.clientConfig.setWorkerThreads(4);
         this.client = new NettyRemotingClient(clientConfig);
+        this.isRunning = true;
     }
 
     /**
@@ -57,11 +67,13 @@ public class LogClientService {
      */
     public void close() {
         this.client.close();
+        this.isRunning = false;
         logger.info("logger client closed");
     }
 
     /**
      * roll view log
+     *
      * @param host host
      * @param port port
      * @param path path
@@ -69,7 +81,7 @@ public class LogClientService {
      * @param limit limit
      * @return log content
      */
-    public String rollViewLog(String host, int port, String path,int skipLineNum,int limit) {
+    public String rollViewLog(String host, int port, String path, int skipLineNum, int limit) {
         logger.info("roll view log, host : {}, port : {}, path {}, skipLineNum {} ,limit {}", host, port, path, skipLineNum, limit);
         RollViewLogRequestCommand request = new RollViewLogRequestCommand(path, skipLineNum, limit);
         String result = "";
@@ -77,7 +89,7 @@ public class LogClientService {
         try {
             Command command = request.convert2Command();
             Command response = this.client.sendSync(address, command, LOG_REQUEST_TIMEOUT);
-            if(response != null){
+            if (response != null) {
                 RollViewLogResponseCommand rollReviewLog = JsonSerializer.deserialize(
                         response.getBody(), RollViewLogResponseCommand.class);
                 return rollReviewLog.getMsg();
@@ -92,6 +104,7 @@ public class LogClientService {
 
     /**
      * view log
+     *
      * @param host host
      * @param port port
      * @param path path
@@ -105,7 +118,7 @@ public class LogClientService {
         try {
             Command command = request.convert2Command();
             Command response = this.client.sendSync(address, command, LOG_REQUEST_TIMEOUT);
-            if(response != null){
+            if (response != null) {
                 ViewLogResponseCommand viewLog = JsonSerializer.deserialize(
                         response.getBody(), ViewLogResponseCommand.class);
                 return viewLog.getMsg();
@@ -120,6 +133,7 @@ public class LogClientService {
 
     /**
      * get log size
+     *
      * @param host host
      * @param port port
      * @param path log path
@@ -133,7 +147,7 @@ public class LogClientService {
         try {
             Command command = request.convert2Command();
             Command response = this.client.sendSync(address, command, LOG_REQUEST_TIMEOUT);
-            if(response != null){
+            if (response != null) {
                 GetLogBytesResponseCommand getLog = JsonSerializer.deserialize(
                         response.getBody(), GetLogBytesResponseCommand.class);
                 return getLog.getData();
@@ -149,6 +163,7 @@ public class LogClientService {
 
     /**
      * remove task log
+     *
      * @param host host
      * @param port port
      * @param path path
@@ -162,7 +177,7 @@ public class LogClientService {
         try {
             Command command = request.convert2Command();
             Command response = this.client.sendSync(address, command, LOG_REQUEST_TIMEOUT);
-            if(response != null){
+            if (response != null) {
                 RemoveTaskLogResponseCommand taskLogResponse = JsonSerializer.deserialize(
                         response.getBody(), RemoveTaskLogResponseCommand.class);
                 return taskLogResponse.getStatus();
@@ -174,4 +189,8 @@ public class LogClientService {
         }
         return result;
     }
+
+    public boolean isRunning() {
+        return isRunning;
+    }
 }