diff --git a/config_templates/sql/initDB.sql b/config_templates/sql/initDB.sql
index 888ba81..9176d3c 100644
--- a/config_templates/sql/initDB.sql
+++ b/config_templates/sql/initDB.sql
@@ -10,6 +10,7 @@ CREATE TABLE users (
   id        INTEGER PRIMARY KEY DEFAULT nextval('user_seq'),
   full_name TEXT NOT NULL,
   email     TEXT NOT NULL,
-  flag      user_flag NOT NULL
+  flag      user_flag NOT NULL,
+  UNIQUE (email)
 );
 
diff --git a/parent-web/pom.xml b/parent-web/pom.xml
index 57c9ba5..d58b978 100644
--- a/parent-web/pom.xml
+++ b/parent-web/pom.xml
@@ -26,6 +26,44 @@
                     <failOnMissingWebXml>false</failOnMissingWebXml>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.codehaus.cargo</groupId>
+                <artifactId>cargo-maven3-plugin</artifactId>
+                <version>1.10.8</version>
+                <configuration>
+                    <container>
+                        <containerId>tomcat9x</containerId>
+                        <systemProperties>
+                            <file.encoding>UTF-8</file.encoding>
+                        </systemProperties>
+                        <dependencies>
+                            <dependency>
+                                <groupId>org.postgresql</groupId>
+                                <artifactId>postgresql</artifactId>
+                            </dependency>
+                        </dependencies>
+                    </container>
+                    <configuration>
+                        <configfiles>
+                            <configfile>
+                                <file>${masterjava.config}/context.xml</file>
+                                <todir>conf/Catalina/localhost/</todir>
+                                <tofile>context.xml.default</tofile>
+                            </configfile>
+                        </configfiles>
+                    </configuration>
+                    <deployables>
+                        <deployable>
+                            <groupId>${project.groupId}</groupId>
+                            <artifactId>${project.artifactId}</artifactId>
+                            <type>war</type>
+                            <properties>
+                                <context>${project.build.finalName}</context>
+                            </properties>
+                        </deployable>
+                    </deployables>
+                </configuration>
+            </plugin>
         </plugins>
 
         <resources>
@@ -54,6 +92,46 @@
             <version>3.1.0</version>
             <scope>provided</scope>
         </dependency>
+        <!-- API -->
+        <dependency>
+            <groupId>jakarta.xml.bind</groupId>
+            <artifactId>jakarta.xml.bind-api</artifactId>
+            <version>4.0.0</version>
+            <exclusions>
+                <exclusion>
+                    <groupId>jakarta.activation</groupId>
+                    <artifactId>jakarta.activation-api</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!-- Runtime -->
+        <dependency>
+            <groupId>com.sun.xml.bind</groupId>
+            <artifactId>jaxb-impl</artifactId>
+            <version>4.0.2</version>
+            <scope>runtime</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>com.sun.activation</groupId>
+                    <artifactId>jakarta.activation-api</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!-- Alternative runtime -->
+        <dependency>
+            <groupId>org.glassfish.jaxb</groupId>
+            <artifactId>jaxb-runtime</artifactId>
+            <version>4.0.2</version>
+            <scope>runtime</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>com.sun.activation</groupId>
+                    <artifactId>jakarta.activation-api</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
     </dependencies>
 
     <profiles>
diff --git a/parent/pom.xml b/parent/pom.xml
index 3249d86..6a068da 100644
--- a/parent/pom.xml
+++ b/parent/pom.xml
@@ -11,7 +11,7 @@
     <name>Parent</name>
 
     <properties>
-        <java.version>1.8</java.version>
+        <java.version>17</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <!-- Logging -->
@@ -108,6 +108,21 @@
             <version>4.12</version>
             <scope>test</scope>
         </dependency>
+        <!--<dependency>
+            <groupId>com.sun.activation</groupId>
+            <artifactId>jakarta.activation</artifactId>
+            <version>2.0.1</version>
+        </dependency>
+        <dependency>
+            <groupId>jakarta.transaction</groupId>
+            <artifactId>jakarta.transaction-api</artifactId>
+            <version>2.0.1</version>
+        </dependency>
+        <dependency>
+            <groupId>jakarta.annotation</groupId>
+            <artifactId>jakarta.annotation-api</artifactId>
+            <version>2.1.1</version>
+        </dependency>-->
     </dependencies>
 
     <profiles>
diff --git a/persist/src/main/java/ru/javaops/masterjava/persist/dao/UserDao.java b/persist/src/main/java/ru/javaops/masterjava/persist/dao/UserDao.java
index e0230cc..05c2112 100644
--- a/persist/src/main/java/ru/javaops/masterjava/persist/dao/UserDao.java
+++ b/persist/src/main/java/ru/javaops/masterjava/persist/dao/UserDao.java
@@ -2,9 +2,11 @@
 
 import com.bertoncelj.jdbi.entitymapper.EntityMapperFactory;
 import org.skife.jdbi.v2.sqlobject.*;
+import org.skife.jdbi.v2.sqlobject.customizers.BatchChunkSize;
 import org.skife.jdbi.v2.sqlobject.customizers.RegisterMapperFactory;
 import ru.javaops.masterjava.persist.model.User;
 
+import java.util.Iterator;
 import java.util.List;
 
 @RegisterMapperFactory(EntityMapperFactory.class)
@@ -26,7 +28,6 @@ public User insert(User user) {
 
     @SqlUpdate("INSERT INTO users (id, full_name, email, flag) VALUES (:id, :fullName, :email, CAST(:flag AS user_flag)) ")
     abstract void insertWitId(@BindBean User user);
-
     @SqlQuery("SELECT * FROM users ORDER BY full_name, email LIMIT :it")
     public abstract List<User> getWithLimit(@Bind int limit);
 
@@ -34,4 +35,6 @@ public User insert(User user) {
     @SqlUpdate("TRUNCATE users")
     @Override
     public abstract void clean();
+    @SqlBatch("INSERT INTO users (full_name, email, flag) VALUES (:fullName, :email, CAST(:flag AS user_flag))")
+    public abstract void insertAll(@BindBean List<User> users, @BatchChunkSize int chunkSize);
 }
diff --git a/web/upload/src/main/java/ru/javaops/masterjava/upload/UploadServlet.java b/web/upload/src/main/java/ru/javaops/masterjava/upload/UploadServlet.java
index 2b54f69..5e5d7c8 100644
--- a/web/upload/src/main/java/ru/javaops/masterjava/upload/UploadServlet.java
+++ b/web/upload/src/main/java/ru/javaops/masterjava/upload/UploadServlet.java
@@ -3,7 +3,6 @@
 import org.thymeleaf.context.WebContext;
 import ru.javaops.masterjava.persist.model.User;
 
-import javax.servlet.ServletException;
 import javax.servlet.annotation.MultipartConfig;
 import javax.servlet.annotation.WebServlet;
 import javax.servlet.http.HttpServlet;
@@ -21,7 +20,6 @@
 public class UploadServlet extends HttpServlet {
 
     private final UserProcessor userProcessor = new UserProcessor();
-
     @Override
     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
         final WebContext webContext = new WebContext(req, resp, req.getServletContext(), req.getLocale());
@@ -39,7 +37,8 @@ protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws I
                 throw new IllegalStateException("Upload file have not been selected");
             }
             try (InputStream is = filePart.getInputStream()) {
-                List<User> users = userProcessor.process(is);
+                int chunkSize = Integer.parseInt(req.getParameter("chunkSize"));
+                List<User> users = userProcessor.process(is, chunkSize);
                 webContext.setVariable("users", users);
                 engine.process("result", webContext, resp.getWriter());
             }
diff --git a/web/upload/src/main/java/ru/javaops/masterjava/upload/UserProcessor.java b/web/upload/src/main/java/ru/javaops/masterjava/upload/UserProcessor.java
index 5cb3deb..8311e2e 100644
--- a/web/upload/src/main/java/ru/javaops/masterjava/upload/UserProcessor.java
+++ b/web/upload/src/main/java/ru/javaops/masterjava/upload/UserProcessor.java
@@ -1,5 +1,7 @@
 package ru.javaops.masterjava.upload;
 
+import ru.javaops.masterjava.persist.DBIProvider;
+import ru.javaops.masterjava.persist.dao.UserDao;
 import ru.javaops.masterjava.persist.model.User;
 import ru.javaops.masterjava.persist.model.UserFlag;
 import ru.javaops.masterjava.xml.schema.ObjectFactory;
@@ -7,7 +9,7 @@
 import ru.javaops.masterjava.xml.util.JaxbUnmarshaller;
 import ru.javaops.masterjava.xml.util.StaxStreamProcessor;
 
-import javax.xml.bind.JAXBException;
+import jakarta.xml.bind.JAXBException;
 import javax.xml.stream.XMLStreamException;
 import javax.xml.stream.events.XMLEvent;
 import java.io.InputStream;
@@ -16,8 +18,9 @@
 
 public class UserProcessor {
     private static final JaxbParser jaxbParser = new JaxbParser(ObjectFactory.class);
+    private final UserDao userDao = DBIProvider.getDao(UserDao.class);
 
-    public List<User> process(final InputStream is) throws XMLStreamException, JAXBException {
+    public List<User> process(final InputStream is, int chunkSize) throws XMLStreamException, JAXBException {
         final StaxStreamProcessor processor = new StaxStreamProcessor(is);
         List<User> users = new ArrayList<>();
 
@@ -27,6 +30,7 @@ public List<User> process(final InputStream is) throws XMLStreamException, JAXBE
             final User user = new User(xmlUser.getValue(), xmlUser.getEmail(), UserFlag.valueOf(xmlUser.getFlag().value()));
             users.add(user);
         }
+        userDao.insertAll(users, chunkSize);
         return users;
     }
 }
diff --git a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/CityType.java b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/CityType.java
index 0615e8c..744e50b 100644
--- a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/CityType.java
+++ b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/CityType.java
@@ -1,9 +1,9 @@
 package ru.javaops.masterjava.xml.schema;
 
-import javax.xml.bind.annotation.*;
-import javax.xml.bind.annotation.adapters.CollapsedStringAdapter;
-import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
 
+import jakarta.xml.bind.annotation.*;
+import jakarta.xml.bind.annotation.adapters.CollapsedStringAdapter;
+import jakarta.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
 
 /**
  * <p>Java class for cityType complex type.
diff --git a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/FlagType.java b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/FlagType.java
index eda39fa..ef73676 100644
--- a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/FlagType.java
+++ b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/FlagType.java
@@ -1,10 +1,10 @@
 
 package ru.javaops.masterjava.xml.schema;
 
-import javax.xml.bind.annotation.XmlEnum;
-import javax.xml.bind.annotation.XmlEnumValue;
-import javax.xml.bind.annotation.XmlType;
 
+import jakarta.xml.bind.annotation.XmlEnum;
+import jakarta.xml.bind.annotation.XmlEnumValue;
+import jakarta.xml.bind.annotation.XmlType;
 
 /**
  * <p>Java class for flagType.
diff --git a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/GroupType.java b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/GroupType.java
index d504164..f886192 100644
--- a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/GroupType.java
+++ b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/GroupType.java
@@ -1,9 +1,9 @@
 
 package ru.javaops.masterjava.xml.schema;
 
-import javax.xml.bind.annotation.XmlEnum;
-import javax.xml.bind.annotation.XmlType;
 
+import jakarta.xml.bind.annotation.XmlEnum;
+import jakarta.xml.bind.annotation.XmlType;
 
 /**
  * <p>Java class for groupType.
diff --git a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/ObjectFactory.java b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/ObjectFactory.java
index bfb3932..62d0744 100644
--- a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/ObjectFactory.java
+++ b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/ObjectFactory.java
@@ -1,9 +1,11 @@
 
 package ru.javaops.masterjava.xml.schema;
 
-import javax.xml.bind.JAXBElement;
-import javax.xml.bind.annotation.XmlElementDecl;
-import javax.xml.bind.annotation.XmlRegistry;
+
+import jakarta.xml.bind.JAXBElement;
+import jakarta.xml.bind.annotation.XmlElementDecl;
+import jakarta.xml.bind.annotation.XmlRegistry;
+
 import javax.xml.namespace.QName;
 
 
diff --git a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/Payload.java b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/Payload.java
index 9d4cc30..a1f1c52 100644
--- a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/Payload.java
+++ b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/Payload.java
@@ -1,7 +1,7 @@
 
 package ru.javaops.masterjava.xml.schema;
 
-import javax.xml.bind.annotation.*;
+import jakarta.xml.bind.annotation.*;
 import java.util.ArrayList;
 import java.util.List;
 
diff --git a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/Project.java b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/Project.java
index 180a997..2c86119 100644
--- a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/Project.java
+++ b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/Project.java
@@ -1,9 +1,9 @@
 
 package ru.javaops.masterjava.xml.schema;
 
-import javax.xml.bind.annotation.*;
-import javax.xml.bind.annotation.adapters.CollapsedStringAdapter;
-import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
+import jakarta.xml.bind.annotation.*;
+import jakarta.xml.bind.annotation.adapters.CollapsedStringAdapter;
+import jakarta.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
 import java.util.ArrayList;
 import java.util.List;
 
diff --git a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/User.java b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/User.java
index 1959b96..21b5d2e 100644
--- a/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/User.java
+++ b/web/upload/src/main/java/ru/javaops/masterjava/xml/schema/User.java
@@ -1,6 +1,6 @@
 package ru.javaops.masterjava.xml.schema;
 
-import javax.xml.bind.annotation.*;
+import jakarta.xml.bind.annotation.*;
 import java.util.ArrayList;
 import java.util.List;
 
diff --git a/web/upload/src/main/java/ru/javaops/masterjava/xml/util/JaxbMarshaller.java b/web/upload/src/main/java/ru/javaops/masterjava/xml/util/JaxbMarshaller.java
index 507825d..5d38eee 100644
--- a/web/upload/src/main/java/ru/javaops/masterjava/xml/util/JaxbMarshaller.java
+++ b/web/upload/src/main/java/ru/javaops/masterjava/xml/util/JaxbMarshaller.java
@@ -1,9 +1,10 @@
 package ru.javaops.masterjava.xml.util;
 
-import javax.xml.bind.JAXBContext;
-import javax.xml.bind.JAXBException;
-import javax.xml.bind.Marshaller;
-import javax.xml.bind.PropertyException;
+import jakarta.xml.bind.JAXBContext;
+import jakarta.xml.bind.JAXBException;
+import jakarta.xml.bind.Marshaller;
+import jakarta.xml.bind.PropertyException;
+
 import javax.xml.validation.Schema;
 import java.io.StringWriter;
 import java.io.Writer;
diff --git a/web/upload/src/main/java/ru/javaops/masterjava/xml/util/JaxbParser.java b/web/upload/src/main/java/ru/javaops/masterjava/xml/util/JaxbParser.java
index 8aff555..8253480 100644
--- a/web/upload/src/main/java/ru/javaops/masterjava/xml/util/JaxbParser.java
+++ b/web/upload/src/main/java/ru/javaops/masterjava/xml/util/JaxbParser.java
@@ -1,9 +1,10 @@
 package ru.javaops.masterjava.xml.util;
 
+import jakarta.xml.bind.JAXBContext;
+import jakarta.xml.bind.JAXBException;
 import org.xml.sax.SAXException;
 
-import javax.xml.bind.JAXBContext;
-import javax.xml.bind.JAXBException;
+
 import javax.xml.transform.stream.StreamSource;
 import javax.xml.validation.Schema;
 import java.io.IOException;
diff --git a/web/upload/src/main/java/ru/javaops/masterjava/xml/util/JaxbUnmarshaller.java b/web/upload/src/main/java/ru/javaops/masterjava/xml/util/JaxbUnmarshaller.java
index f9f29c2..a34f1ab 100644
--- a/web/upload/src/main/java/ru/javaops/masterjava/xml/util/JaxbUnmarshaller.java
+++ b/web/upload/src/main/java/ru/javaops/masterjava/xml/util/JaxbUnmarshaller.java
@@ -1,8 +1,9 @@
 package ru.javaops.masterjava.xml.util;
 
-import javax.xml.bind.JAXBContext;
-import javax.xml.bind.JAXBException;
-import javax.xml.bind.Unmarshaller;
+import jakarta.xml.bind.JAXBContext;
+import jakarta.xml.bind.JAXBException;
+import jakarta.xml.bind.Unmarshaller;
+
 import javax.xml.stream.XMLStreamReader;
 import javax.xml.validation.Schema;
 import java.io.InputStream;
diff --git a/web/upload/src/main/webapp/WEB-INF/templates/upload.html b/web/upload/src/main/webapp/WEB-INF/templates/upload.html
index d48c312..0af39b0 100644
--- a/web/upload/src/main/webapp/WEB-INF/templates/upload.html
+++ b/web/upload/src/main/webapp/WEB-INF/templates/upload.html
@@ -3,7 +3,7 @@
     <title>Upload XML</title>
 </head>
 <body>
-<form action="" method="post" enctype="multipart/form-data">
+<form action="/?chunkSize=1" method="post" enctype="multipart/form-data">
     <h3>Select xml file to upload</h3>
     <p>
         <input type="file" name="fileToUpload" id="fileToUpload"><br/>
diff --git a/web/upload/src/test/java/ru/javaops/masterjava/xml/util/JaxbParserTest.java b/web/upload/src/test/java/ru/javaops/masterjava/xml/util/JaxbParserTest.java
index 4754b17..44e6c41 100644
--- a/web/upload/src/test/java/ru/javaops/masterjava/xml/util/JaxbParserTest.java
+++ b/web/upload/src/test/java/ru/javaops/masterjava/xml/util/JaxbParserTest.java
@@ -1,12 +1,13 @@
 package ru.javaops.masterjava.xml.util;
 
 import com.google.common.io.Resources;
+import jakarta.xml.bind.JAXBElement;
 import org.junit.Test;
 import ru.javaops.masterjava.xml.schema.CityType;
 import ru.javaops.masterjava.xml.schema.ObjectFactory;
 import ru.javaops.masterjava.xml.schema.Payload;
 
-import javax.xml.bind.JAXBElement;
+
 import javax.xml.namespace.QName;
 
 public class JaxbParserTest {