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Latest Added Tutorials

Introduction: Soft delete is a technique used in database management to mark records as "deleted" without physically removing them from the database. This approach is particularly useful when you want to retain data for historical or audit purposes. In a Spring Boot application using Hibernate as the JPA provider, implementing soft delete functionality can greatly enhance data management. In this article, we will explore how to truly implement soft delete in Spring Boot Hibernate using the CustomInspector class. Implementing Soft Delete with CustomIn...Continue Reading
version: "3.2" services: zookeeper: image: bitnami/zookeeper:3 ports: - 2181:2181 environment: ALLOW_ANONYMOUS_LOGIN: "yes" kafka-0: image: bitnami/kafka:2 ports: - 9092:9092 environment: KAFKA_CFG_ZOOKEEPER_CONNECT: zookeeper:2181 ALLOW_PLAINTEXT_LISTENER: "yes" KAFKA_LISTENERS: >- INTERNAL://:29092,EXTERNAL://:9092 KAFKA_ADVERTISED_LISTENERS: >- INTERNAL://kafka-0:29092,EXTERNAL://localhost:9092 KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: >- INTERNAL:PLA...Continue Reading
We can integrate JWTS token for Spring REST API by using following component: import io.jsonwebtoken.Claims; import io.jsonwebtoken.JwtParser; import io.jsonwebtoken.Jwts; import io.jsonwebtoken.impl.DefaultClaims; import io.jsonwebtoken.io.Decoders; import io.jsonwebtoken.security.Keys; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Component; import java.util.Date; import java.util.function.Function; @Component public class JwtUtils { private static final Logger logger = LoggerFactory.getLogger(J...Continue Reading
Normally Glassfish looks at the cacerts.jks certificate file stored in the GLASSFISH_SERVER\glassfish\domains\domain1\config location.You can change this configuration or replace cacerts.jks file with your cacerts file. There are some default JVM Options which Glassfish is used:      -XX:+UnlockDiagnosticVMOptions      -XX:NewRatio=2      -XX:MaxPermSize=192m      -Xmx512m      -client      -javaagent:C:/glassfish5/glassfish/li...Continue Reading
First Step: localhost:8081 when you encounter a user login screen, run this code:  - select account_status from dba_users where username = 'ANONYMOUS'; if you encounter this error: SP2-0640: Not connected, firstly run this code: sqlplus /nolog - alter user ANONYMOUS identified by anonymous; - alter user ANONYMOUS account unlock;
Flutter TextFormField Phone Number Formatter Converts phone number 00000000 to (000) 000 0000 class PhoneNumberFormatter extends TextInputFormatter { PhoneNumberFormatter(); @override TextEditingValue formatEditUpdate( TextEditingValue oldValue, TextEditingValue newValue, ) { if (!oldValue.text.contains("(") && oldValue.text.length >= 10 && newValue.text.length != oldValue.text.length) { return TextEditingValue( text: "", selection: TextSelection.collapsed(offset: 0), ); }...Continue Reading
class ApiHelper { static const String BASE_PATH = "http://api.example.com"; static const String API_PATH = "/api"; Future<ApiResponseModel> request(String url, {Map<String, String> queryParameters, bearerToken = '', isSSL = false}) async { return _innerRequest(url, 'GET',bearerToken,isSSL); } Future<ApiResponseModel> _innerRequest(String url, String type, [postParams,bearerToken = '']) async { url = _getUrl(url); Dio dio = _getDio(bearerToken); try { var response; if(type=='GET')...Continue Reading
PostsDataSource class PostsDataSource(private val scope: CoroutineScope) : PageKeyedDataSource<Int, Question>() { private val repository = QuestionRepository() override fun loadInitial( params: LoadInitialParams<Int>, callback: LoadInitialCallback<Int, Question> ) { scope.launch { try { val response = repository.getQuestionsAsync(1) when { response.success -> { val listing = response.data val...Continue Reading
Fragment import android.os.Bundle import androidx.fragment.app.Fragment import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import androidx.lifecycle.Observer import androidx.lifecycle.ViewModelProvider import androidx.recyclerview.widget.LinearLayoutManager import com.codesenior.period.tracker.R import com.codesenior.period.tracker.adapters.QuestionAdapter import com.codesenior.period.tracker.factories.QuestionViewModelFactory import com.codesenior.period.tracker.repositories.QuestionRepository import kotlinx.andr...Continue Reading
Events abstract class CounterEvent {} class IncrementEvent extends CounterEvent{} class DecrementEvent extends CounterEvent{} Bloc Class import 'dart:async'; import 'package:fluttertemplate/blocs/bloc.dart'; import 'counter_event.dart'; /// More Detail: /// https://www.didierboelens.com/2018/08/reactive-programming-streams-bloc/ /// https://pub.dev/documentation/rxdart/latest/ /// https://blog.soshace.com/understanding-flutter-bloc-pattern/ class CounterBloc extends Bloc { int _counter = 0; final _counterStateController = StreamController<i...Continue Reading
Number Increment Decrement Widget import 'package:flutter/cupertino.dart'; import 'package:flutter/material.dart'; import 'package:flutter/services.dart'; import 'package:kadir_alkan_kuafor/models/general_model.dart'; import 'package:kadir_alkan_kuafor/models/number_increment_decrement_model.dart'; class NumberIncrementDecrement extends StatefulWidget { final NumberIncrementDecrementModel numberIncrementDecrementModel; NumberIncrementDecrement({Key key, this.numberIncrementDecrementModel}) : super(key: key); @override StateContinue Reading
We can use FTPClient class in apache commons library to send UTF-8 encoded file names, such as Turkish, chinese, german etc. ftpClient = new FTPClient(); String server ="ftp.server.com"; int port = 21; String user ="test"; String pass ="test"; ftpClient.setControlEncoding("UTF-8");//must be before connect() method ftpClient.connect(server, port); ftpClient.login(user, pass); ftpClient.enterLocalPassiveMode(); ftpClient.setFileType(FTP.BINARY_FILE_TYPE); ftpClient.sendCommand("OPTS UTF8 ON");//we should send this command...Continue Reading
We can use following class to set alarm for multiple day of weeks: import android.app.AlarmManager; import android.app.PendingIntent; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import java.util.Calendar; public class AlarmStartRadioHelper { private Context mContext; private Class<? extends BroadcastReceiver> mBroadcastReceiverClass; private static int RQS_1 = 1002; private String mActionName; public AlarmStartRadioHelper(Context context, Class<? extends Broa...Continue Reading
Showing admob interstitial ads when splash screen is loaded with a timer can be implemented as follows: package com.codesenior.admob; import android.content.Intent; import android.os.Bundle; import androidx.appcompat.app.AppCompatActivity; import com.google.android.gms.ads.AdListener; import com.google.android.gms.ads.AdRequest; import com.google.android.gms.ads.InterstitialAd; import java.util.Timer; import java.util.TimerTask; public class SplashActivity extends AppCompatActivity { private InterstitialAd mInterstitialAd; private Timer...Continue Reading
Android simple GET Request: import android.os.AsyncTask; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; public class HttpGetRequestTask extends AsyncTask<String, Integer, String> { private RequestResponseHandler requestResponseHandler; public HttpGetRequestTask(RequestResponseHandler requestResponseHandler) { this.requestResponseHandler=requestResponseHandler; } protected String doInBackground(String... urls) {...Continue Reading

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