updated

create-file/merged.txt

-1, Ahmed, 23, business, false, hbl, 231234123, false
+1, Ahmed, 23, banker, false, hbl, 231234123, true
 2, Qadeer, 23, job, false, hbl, 231234123, false
 3, Sahal, 23, job, false, hbl, 231234123, false
-4, Arham, 23, business, false, hbl, 231234123, true
-5, Naveed, 23, banker, false, hbl, 231234123, false
+4, Arham, 23, banker, false, hbl, 231234123, arham
+5, Naveed, 23, job, false, hbl, 231234123, false
+

user-service/pom.xml

@@ -17,6 +17,13 @@
 		<java.version>1.8</java.version>
 	</properties>
 	<dependencies>
+		<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-lang3</artifactId>
+			<version>3.12.0</version>
+		</dependency>
+
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
@@ -36,7 +43,12 @@
 			<artifactId>validation-api</artifactId>
 			<version>2.0.1.Final</version>
 		</dependency>
-		<!-- https://mvnrepository.com/artifact/com.h2database/h2 -->
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>2.11.0</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/com.h2database/h2 -->
 <!--		<dependency>-->
 <!--			<groupId>com.h2database</groupId>-->
 <!--			<artifactId>h2</artifactId>-->
@@ -57,7 +69,15 @@
 					</excludes>
 				</configuration>
 			</plugin>
-		</plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>11</source>
+                    <target>11</target>
+                </configuration>
+            </plugin>
+        </plugins>
 	</build>
 
 </project>

user-service/src/main/java/com/qadeer/user/service/UserService.java

 package com.qadeer.user.service;
 
 import com.qadeer.user.model.User;
+import org.apache.commons.lang3.ArrayUtils;
 import org.springframework.stereotype.Service;
 
 import java.io.*;
+
+
 import java.util.Arrays;
 import java.util.List;
 
+import org.apache.commons.io.FileUtils;
+import java.io.IOException;
+
 
 @Service
 public class UserService {
@@ -38,44 +44,41 @@ public class UserService {
 
     public String updateUserById(int id, String status) throws IOException {
         boolean flag = false;
-        BufferedReader br = new BufferedReader(new FileReader("/Users/aqadeer/Desktop/java-training-project-2/create-file/merged.txt"));
-        String myLine = br.readLine();
-        StringBuilder myString  = new StringBuilder();
-        StringBuilder result  = new StringBuilder();
-        myString.append(myLine);
-        myString.append("\n");
+        StringBuilder result = new StringBuilder();
 
-        while (myLine != null) {
+        //java 8
+        String contents = FileUtils.readFileToString(new File("/Users/aqadeer/Desktop/java-training-project-2/create-file/merged.txt"), "UTF-8");
+        String[] contentArray = contents.split("\n");
+
+        for (String x : contentArray) {
 
-            List<String> myStringList = Arrays.asList(myLine.split(","));
+            List<String> myStringList = Arrays.asList(x.split(","));
             int myId = Integer.parseInt(myStringList.get(0));
             String profession = myStringList.get(3).trim();
-            int x = Integer.parseInt(String.valueOf(myLine.charAt(0)));
-            if (x == id && (profession.equals("business") || profession.equals("banker"))) {
-                String someStr = String.valueOf(myString).replaceAll(" [^,]*$", " " + status);
+
+
+            if (myId == id && (profession.equals("business") || profession.equals("banker"))) {
+                String someStr = String.valueOf(x).replaceAll(" [^,]*$", " " + status);
                 result.append(someStr);
                 result.append("\n");
+                contentArray = ArrayUtils.remove(contentArray, 0);
                 flag = true;
+                break;
             }
             else {
-                result.append(myString);
+                result.append(x);
+                result.append("\n");
+                contentArray = ArrayUtils.remove(contentArray, 0);
 
             }
-
-            myLine = br.readLine();
-            if (myLine == null) {
-                break;
-            }
-            myString = new StringBuilder();
-            myString.append(myLine);
-            myString.append("\n");
+        }
+        String finalString = String.join("\n", contentArray);
+        result.append(finalString);
+        result.append("\n");
 
 
-        }
         if (flag) {
             PrintWriter pw = new PrintWriter("/Users/aqadeer/Desktop/java-training-project-2/create-file/merged.txt");
-            int last = result.lastIndexOf("\n");
-            if (last >= 0) { result.delete(last, result.length()); }
             pw.println(String.valueOf(result));
             pw.flush();
             pw.close();
@@ -83,4 +86,43 @@ public class UserService {
         }
         return "not allowed";
     }
+
+//        while (myLine != null) {
+//
+//            List<String> myStringList = Arrays.asList(myLine.split(","));
+//            int myId = Integer.parseInt(myStringList.get(0));
+//            String profession = myStringList.get(3).trim();
+//            int x = Integer.parseInt(String.valueOf(myLine.charAt(0)));
+//            if (x == id && (profession.equals("business") || profession.equals("banker"))) {
+//                String someStr = String.valueOf(myString).replaceAll(" [^,]*$", " " + status);
+//                result.append(someStr);
+//                result.append("\n");
+//                flag = true;
+//            }
+//            else {
+//                result.append(myString);
+//
+//            }
+//
+//            myLine = br.readLine();
+//            if (myLine == null) {
+//                break;
+//            }
+//            myString = new StringBuilder();
+//            myString.append(myLine);
+//            myString.append("\n");
+//
+//
+//        }
+//        if (flag) {
+//            PrintWriter pw = new PrintWriter("/Users/aqadeer/Desktop/java-training-project-2/create-file/merged.txt");
+//            int last = result.lastIndexOf("\n");
+//            if (last >= 0) { result.delete(last, result.length()); }
+//            pw.println(String.valueOf(result));
+//            pw.flush();
+//            pw.close();
+//            return "user updated.";
+//        }
+//        return "not allowed";
+//    }
 }