docs: Saga explanation (#2962)

* docs: update cqrs pattern name

* docs: add saga docs

saga/src/main/java/com/iluwatar/saga/choreography/Saga.java

@@ -27,6 +27,8 @@ package com.iluwatar.saga.choreography;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import lombok.Getter;
+import lombok.Setter;
 
 /**
  * Saga representation. Saga consists of chapters. Every ChoreographyChapter is executed a certain
@@ -154,37 +156,19 @@ public class Saga {
    * outcoming parameter).
    */
   public static class Chapter {
+    @Getter
     private final String name;
+    @Setter
     private ChapterResult result;
+    @Getter
+    @Setter
     private Object inValue;
 
-
     public Chapter(String name) {
       this.name = name;
       this.result = ChapterResult.INIT;
     }
 
-    public Object getInValue() {
-      return inValue;
-    }
-
-    public void setInValue(Object object) {
-      this.inValue = object;
-    }
-
-    public String getName() {
-      return name;
-    }
-
-    /**
-     * set result.
-     *
-     * @param result {@link ChapterResult}
-     */
-    public void setResult(ChapterResult result) {
-      this.result = result;
-    }
-
     /**
      * the result for chapter is good.
      *

saga/src/main/java/com/iluwatar/saga/choreography/WithdrawMoneyService.java

@@ -45,7 +45,7 @@ public class WithdrawMoneyService extends Service {
     if (inValue.equals("bad_order")) {
       LOGGER.info("The chapter '{}' has been started. But the exception has been raised."
               + "The rollback is about to start",
-          getName(), inValue);
+          getName());
       saga.setCurrentStatus(Saga.ChapterResult.ROLLBACK);
       return saga;
     }

saga/src/main/java/com/iluwatar/saga/orchestration/ChapterResult.java

@@ -24,19 +24,18 @@
  */
 package com.iluwatar.saga.orchestration;
 
+import lombok.Getter;
+
 /**
  * Executing result for chapter.
  *
  * @param <K> incoming value
  */
 public class ChapterResult<K> {
+  @Getter
   private final K value;
   private final State state;
 
-  public K getValue() {
-    return value;
-  }
-
   ChapterResult(K value, State state) {
     this.value = value;
     this.state = state;

saga/src/main/java/com/iluwatar/saga/orchestration/Saga.java

@@ -26,6 +26,8 @@ package com.iluwatar.saga.orchestration;
 
 import java.util.ArrayList;
 import java.util.List;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
 
 /**
  * Saga representation. Saga consists of chapters. Every ChoreographyChapter is executed by a
@@ -70,15 +72,9 @@ public class Saga {
   /**
    * class represents chapter name.
    */
+  @AllArgsConstructor
+  @Getter
   public static class Chapter {
     String name;
-
-    public Chapter(String name) {
-      this.name = name;
-    }
-
-    public String getName() {
-      return name;
-    }
   }
 }

saga/src/main/java/com/iluwatar/saga/orchestration/WithdrawMoneyService.java

@@ -38,7 +38,7 @@ public class WithdrawMoneyService extends Service<String> {
     if (value.equals("bad_order") || value.equals("crashed_order")) {
       LOGGER.info("The chapter '{}' has been started. But the exception has been raised."
               + "The rollback is about to start",
-          getName(), value);
+          getName());
       return ChapterResult.failure(value);
     }
     return super.process(value);