remove volatile

Author: carlosthe19916

pom.xml

@@ -23,7 +23,7 @@
 
     <groupId>io.github.project-openubl</groupId>
     <artifactId>xml-sender-ws</artifactId>
-    <version>2.0.1-SNAPSHOT</version>
+    <version>2.1.0-SNAPSHOT</version>
 
     <name>XML Sender WS :: Services</name>
     <description>SUNAT Web Services Endpoints</description>

src/main/java/io/github/project/openubl/xmlsenderws/webservices/managers/smart/SmartBillServiceConfig.java

@@ -18,7 +18,7 @@
 
 public class SmartBillServiceConfig {
 
-    private static volatile SmartBillServiceConfig instance;
+    private static SmartBillServiceConfig instance;
 
     private String invoiceAndNoteDeliveryURL;
     private String perceptionAndRetentionDeliveryURL;

src/main/java/io/github/project/openubl/xmlsenderws/webservices/providers/ErrorBillServiceRegistry.java

@@ -22,9 +22,9 @@
 
 public class ErrorBillServiceRegistry {
 
-    private static volatile ErrorBillServiceRegistry instance;
+    private static ErrorBillServiceRegistry instance;
 
-    private List<ErrorBillServiceProviderFactory> factories;
+    private final List<ErrorBillServiceProviderFactory> factories;
 
     private ErrorBillServiceRegistry() {
         factories = new LinkedList<>();

src/main/java/io/github/project/openubl/xmlsenderws/webservices/utils/SunatErrors.java

@@ -21,9 +21,9 @@
 
 public class SunatErrors {
 
-    private static volatile SunatErrors instance;
+    private static SunatErrors instance;
 
-    private Map<Integer, String> map = new TreeMap<>();
+    private final Map<Integer, String> map = new TreeMap<>();
 
     private SunatErrors() {
         initializeMap();