Refactoring: Separate duplicated logic into method

Author: Dokyeongyun

src/main/java/root/core/repository/implement/LinuxServerMonitoringRepository.java

@@ -1,5 +1,6 @@
 package root.core.repository.implement;
 
+import java.io.IOException;
 import java.io.InputStream;
 import java.time.LocalDate;
 import java.util.ArrayList;
@@ -10,6 +11,7 @@
 import org.apache.commons.io.IOUtils;
 
 import com.jcraft.jsch.Channel;
+import com.jcraft.jsch.JSchException;
 import com.jcraft.jsch.Session;
 
 import lombok.extern.slf4j.Slf4j;
@@ -40,33 +42,22 @@ public String getServerName() {
 	public int getAlertLogFileLineCount(AlertLogCommand alc) {
 		int fileLineCnt = 0;
 		try {
-			Session session = jsch.getSession();
-			session.connect();
-			Channel channel = jsch.openExecChannel(session, "cat " + alc.getReadFilePath() + " | wc -l");
-			InputStream in = jsch.connectChannel(channel);
-			String result = IOUtils.toString(in, "UTF-8");
-			fileLineCnt = Integer.parseInt(result.trim());
-			jsch.disConnectChannel(channel);
-			jsch.disConnect(session);
+			String command = "cat " + alc.getReadFilePath() + " | wc -l";
+			String executeResult = executeCommand(command);
+			fileLineCnt = Integer.parseInt(executeResult.trim());
 		} catch (Exception e) {
 			log.error(e.getMessage());
 		}
 
 		return fileLineCnt;
 	}
-
+	
 	@Override
 	public String checkAlertLog(AlertLogCommand alc) {
 		String result = "";
 		try {
-			Session session = jsch.getSession();
-			session.connect();
 			String command = "tail -" + alc.getReadLine() + " " + alc.getReadFilePath();
-			Channel channel = jsch.openExecChannel(session, command);
-			InputStream in = jsch.connectChannel(channel);
-			result = IOUtils.toString(in, "UTF-8");
-			jsch.disConnectChannel(channel);
-			jsch.disConnect(session);
+			result = executeCommand(command);
 		} catch (Exception e) {
 			log.error(e.getMessage());
 		}
@@ -261,4 +252,18 @@ private String getAlertLogStringFromCertainDate(AlertLogCommand alc, String star
 
 		return fullAlertLogString;
 	}
+	
+	private String executeCommand(String command) throws JSchException, IOException {
+		String result = null;
+
+		Session session = jsch.getSession();
+		session.connect();
+		Channel channel = jsch.openExecChannel(session, command);
+		InputStream in = jsch.connectChannel(channel);
+		result = IOUtils.toString(in, "UTF-8");
+		jsch.disConnectChannel(channel);
+		jsch.disConnect(session);
+		
+		return result;
+	}
 }