rokon12

Project Instructions

Architecture

• Layered: Controller → Service → Repository
• DTOs are Java records. Never expose JPA entities in API responses.
• Constructor injection only. No field injection.

Code Style

• No catch-all catch (Exception e). Handle specific exceptions.
• Validate inputs at the controller layer using Jakarta Validation.

rokon12

Complete Code Reference

This gist contains all code snippets from the article.

Files:

• snippet-3.java
• snippet-7.java
• snippet-10.java
• snippet-2.java

rokon12

Complete Code Reference

This gist contains all code snippets from the article.

Files:

• snippet-3.java
• snippet-7.java
• snippet-10.java
• snippet-2.java

rokon12

Complete Code Reference

This gist contains all code snippets from the article.

Files:

• snippet-3.java
• snippet-7.java
• snippet-10.java
• snippet-2.java

rokon12

Complete Code Reference

This gist contains all code snippets from the article.

Files:

• snippet-3.java
• snippet-7.java
• snippet-10.java
• snippet-2.java

rokon12

Complete Code Reference

This gist contains all code snippets from the article.

Files:

• snippet-3.java
• snippet-7.java
• snippet-10.java
• snippet-2.java

rokon12

Complete Code Reference

This gist contains all code snippets from the article.

Files:

• snippet-3.java
• snippet-7.java
• snippet-10.java
• snippet-2.java

rokon12

List<Integer> runningMax = values.stream()
    .gather(Gatherers.scan(
        () -> Integer.MIN_VALUE,  // 1️⃣ Start with smallest possible value
        Integer::max              // 2️⃣ Keep the maximum at each step
    ))
    .toList();

System.out.println("Running maximum: " + runningMax);
// Output: [-2147483648, 1, 5, 5, 8, 8, 9, 9, 9, 9]
//          ↑ initial      ↑ 5>1  ↑ 8>5  ↑ 9>8

rokon12

  List<Integer> runningMax = values.stream()
      .gather(Gatherers.scan(
          () -> Integer.MIN_VALUE,
          Integer::max
      ))
      .toList();

  System.out.println("Running maximum: " + runningMax);
// Output: [-2147483648, 1, 5, 5, 8, 8, 9, 9, 9, 9]
//          ↑ initial      ↑ 5>1  ↑ 8>5  ↑ 9>8

rokon12

List<Integer> runningMax = values.stream()
    .gather(Gatherers.scan(
        () -> Integer.MIN_VALUE,  
        Integer::max              
    ))
    .toList();

System.out.println("Running maximum: " + runningMax);
// Output: [-2147483648, 1, 5, 5, 8, 8, 9, 9, 9, 9]
//          ↑ initial      ↑ 5>1  ↑ 8>5  ↑ 9>8