Move ObjectMapper to handler

Author: RaevskiySV

server/src/main/java/com/exactpro/blockchain/api/client/ClientHandler.java

@@ -8,6 +8,7 @@
 import com.exactpro.iso20022.CustomerCreditTransfer;
 import com.exactpro.iso20022.XmlCodec;
 import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import jakarta.xml.bind.JAXBException;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -37,6 +38,7 @@ public class ClientHandler {
     private final ConversionRateRepository conversionRateRepository;
     private final CurrencyRepository currencyRepository;
     private final TransferRepository transferRepository;
+    private final ObjectMapper objectMapper;
     private final MessageRepository messageRepository;
     private final XmlCodec xmlCodec;
     private final CustomerCreditTransferConverter converter;
@@ -59,6 +61,7 @@ public ClientHandler(
         this.clientRepository = clientRepository;
         this.conversionRateRepository = conversionRateRepository;
         this.transferRepository = transferRepository;
+        this.objectMapper = new ObjectMapper();
         this.messageRepository = messageRepository;
         this.currencyRepository = currencyRepository;
         this.xmlCodec = xmlCodec;
@@ -190,7 +193,7 @@ Mono<Void> handle(
 
         String transferJson;
         try {
-            transferJson = transfer.toJson();
+            transferJson = objectMapper.writeValueAsString(transfer);
         } catch (JsonProcessingException e) {
             return Mono.error(new Exception("Failed to convert Transfer to JSON", e));
         }

server/src/main/java/com/exactpro/blockchain/entity/Transfer.java

@@ -1,7 +1,5 @@
 package com.exactpro.blockchain.entity;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
 import org.springframework.data.annotation.Id;
 import org.springframework.data.relational.core.mapping.Column;
 import org.springframework.data.relational.core.mapping.Table;
@@ -14,8 +12,6 @@
 
 @Table("Transfer")
 public class Transfer {
-    private static final ObjectMapper objectMapper = new ObjectMapper();
-
     @Id
     @Column("transferId")
     private Integer transferId;
@@ -254,9 +250,5 @@ public Builder transferTimestamp(Instant transferTimestamp) {
             return this;
         }
     }
-
-    public String toJson() throws JsonProcessingException {
-        return objectMapper.writeValueAsString(this);
-    }
 }