Merge pull request #8125 from eugenp/revert-8119-BAEL-3275-2

Revert "BAEL-3275: Using blocking queue for pub-sub"

jsf/src/main/java/com/baeldung/springintegration/dao/UserManagementDAO.java

@@ -0,0 +1,7 @@
+package com.baeldung.springintegration.dao;
+
+public interface UserManagementDAO {
+
+    boolean createUser(String newUserData);
+
+}

jsf/src/main/java/com/baeldung/springintegration/dao/UserManagementDAOImpl.java

@@ -0,0 +1,36 @@
+package com.baeldung.springintegration.dao;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Repository;
+
+import java.util.ArrayList;
+import java.util.List;
+import javax.annotation.PostConstruct;
+
+@Repository
+public class UserManagementDAOImpl implements UserManagementDAO {
+    private static final Logger LOGGER = LoggerFactory.getLogger(UserManagementDAOImpl.class);
+
+    private List<String> users;
+
+    @PostConstruct
+    public void initUserList() {
+        users = new ArrayList<>();
+    }
+
+    @Override
+    public boolean createUser(String newUserData) {
+        if (newUserData != null) {
+            users.add(newUserData);
+            LOGGER.info("User {} successfully created", newUserData);
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    public UserManagementDAOImpl() {
+    }
+
+}