diff --git a/spring-cloud/spring-cloud-stream/spring-cloud-stream-kafka/src/main/java/com/baeldung/schema/Employee.java b/spring-cloud/spring-cloud-stream/spring-cloud-stream-kafka/src/main/java/com/baeldung/schema/Employee.java
new file mode 100644
index 0000000000..a805491cea
--- /dev/null
+++ b/spring-cloud/spring-cloud-stream/spring-cloud-stream-kafka/src/main/java/com/baeldung/schema/Employee.java
@@ -0,0 +1,517 @@
+/**
+ * Autogenerated by Avro
+ *
+ * DO NOT EDIT DIRECTLY
+ */
+package com.baeldung.schema;
+
+import org.apache.avro.specific.SpecificData;
+import org.apache.avro.message.BinaryMessageEncoder;
+import org.apache.avro.message.BinaryMessageDecoder;
+import org.apache.avro.message.SchemaStore;
+
+@SuppressWarnings("all")
+@org.apache.avro.specific.AvroGenerated
+public class Employee extends org.apache.avro.specific.SpecificRecordBase implements org.apache.avro.specific.SpecificRecord {
+  private static final long serialVersionUID = 7340575283344282036L;
+  public static final org.apache.avro.Schema SCHEMA$ = new org.apache.avro.Schema.Parser().parse("{\"type\":\"record\",\"name\":\"Employee\",\"namespace\":\"com.baeldung.schema\",\"fields\":[{\"name\":\"id\",\"type\":\"int\"},{\"name\":\"firstName\",\"type\":\"string\"},{\"name\":\"lastName\",\"type\":\"string\"},{\"name\":\"department\",\"type\":\"string\",\"default\":\"IT \"},{\"name\":\"designation\",\"type\":\"string\",\"default\":\"Software Engineer\"}]}");
+  public static org.apache.avro.Schema getClassSchema() { return SCHEMA$; }
+
+  private static SpecificData MODEL$ = new SpecificData();
+
+  private static final BinaryMessageEncoder<Employee> ENCODER =
+      new BinaryMessageEncoder<Employee>(MODEL$, SCHEMA$);
+
+  private static final BinaryMessageDecoder<Employee> DECODER =
+      new BinaryMessageDecoder<Employee>(MODEL$, SCHEMA$);
+
+  /**
+   * Return the BinaryMessageDecoder instance used by this class.
+   */
+  public static BinaryMessageDecoder<Employee> getDecoder() {
+    return DECODER;
+  }
+
+  /**
+   * Create a new BinaryMessageDecoder instance for this class that uses the specified {@link SchemaStore}.
+   * @param resolver a {@link SchemaStore} used to find schemas by fingerprint
+   */
+  public static BinaryMessageDecoder<Employee> createDecoder(SchemaStore resolver) {
+    return new BinaryMessageDecoder<Employee>(MODEL$, SCHEMA$, resolver);
+  }
+
+  /** Serializes this Employee to a ByteBuffer. */
+  public java.nio.ByteBuffer toByteBuffer() throws java.io.IOException {
+    return ENCODER.encode(this);
+  }
+
+  /** Deserializes a Employee from a ByteBuffer. */
+  public static Employee fromByteBuffer(
+      java.nio.ByteBuffer b) throws java.io.IOException {
+    return DECODER.decode(b);
+  }
+
+  @Deprecated public int id;
+  @Deprecated public java.lang.CharSequence firstName;
+  @Deprecated public java.lang.CharSequence lastName;
+  @Deprecated public java.lang.CharSequence department;
+  @Deprecated public java.lang.CharSequence designation;
+
+  /**
+   * Default constructor.  Note that this does not initialize fields
+   * to their default values from the schema.  If that is desired then
+   * one should use <code>newBuilder()</code>.
+   */
+  public Employee() {}
+
+  /**
+   * All-args constructor.
+   * @param id The new value for id
+   * @param firstName The new value for firstName
+   * @param lastName The new value for lastName
+   * @param department The new value for department
+   * @param designation The new value for designation
+   */
+  public Employee(java.lang.Integer id, java.lang.CharSequence firstName, java.lang.CharSequence lastName, java.lang.CharSequence department, java.lang.CharSequence designation) {
+    this.id = id;
+    this.firstName = firstName;
+    this.lastName = lastName;
+    this.department = department;
+    this.designation = designation;
+  }
+
+  public org.apache.avro.Schema getSchema() { return SCHEMA$; }
+  // Used by DatumWriter.  Applications should not call.
+  public java.lang.Object get(int field$) {
+    switch (field$) {
+    case 0: return id;
+    case 1: return firstName;
+    case 2: return lastName;
+    case 3: return department;
+    case 4: return designation;
+    default: throw new org.apache.avro.AvroRuntimeException("Bad index");
+    }
+  }
+
+  // Used by DatumReader.  Applications should not call.
+  @SuppressWarnings(value="unchecked")
+  public void put(int field$, java.lang.Object value$) {
+    switch (field$) {
+    case 0: id = (java.lang.Integer)value$; break;
+    case 1: firstName = (java.lang.CharSequence)value$; break;
+    case 2: lastName = (java.lang.CharSequence)value$; break;
+    case 3: department = (java.lang.CharSequence)value$; break;
+    case 4: designation = (java.lang.CharSequence)value$; break;
+    default: throw new org.apache.avro.AvroRuntimeException("Bad index");
+    }
+  }
+
+  /**
+   * Gets the value of the 'id' field.
+   * @return The value of the 'id' field.
+   */
+  public java.lang.Integer getId() {
+    return id;
+  }
+
+  /**
+   * Sets the value of the 'id' field.
+   * @param value the value to set.
+   */
+  public void setId(java.lang.Integer value) {
+    this.id = value;
+  }
+
+  /**
+   * Gets the value of the 'firstName' field.
+   * @return The value of the 'firstName' field.
+   */
+  public java.lang.CharSequence getFirstName() {
+    return firstName;
+  }
+
+  /**
+   * Sets the value of the 'firstName' field.
+   * @param value the value to set.
+   */
+  public void setFirstName(java.lang.CharSequence value) {
+    this.firstName = value;
+  }
+
+  /**
+   * Gets the value of the 'lastName' field.
+   * @return The value of the 'lastName' field.
+   */
+  public java.lang.CharSequence getLastName() {
+    return lastName;
+  }
+
+  /**
+   * Sets the value of the 'lastName' field.
+   * @param value the value to set.
+   */
+  public void setLastName(java.lang.CharSequence value) {
+    this.lastName = value;
+  }
+
+  /**
+   * Gets the value of the 'department' field.
+   * @return The value of the 'department' field.
+   */
+  public java.lang.CharSequence getDepartment() {
+    return department;
+  }
+
+  /**
+   * Sets the value of the 'department' field.
+   * @param value the value to set.
+   */
+  public void setDepartment(java.lang.CharSequence value) {
+    this.department = value;
+  }
+
+  /**
+   * Gets the value of the 'designation' field.
+   * @return The value of the 'designation' field.
+   */
+  public java.lang.CharSequence getDesignation() {
+    return designation;
+  }
+
+  /**
+   * Sets the value of the 'designation' field.
+   * @param value the value to set.
+   */
+  public void setDesignation(java.lang.CharSequence value) {
+    this.designation = value;
+  }
+
+  /**
+   * Creates a new Employee RecordBuilder.
+   * @return A new Employee RecordBuilder
+   */
+  public static com.baeldung.schema.Employee.Builder newBuilder() {
+    return new com.baeldung.schema.Employee.Builder();
+  }
+
+  /**
+   * Creates a new Employee RecordBuilder by copying an existing Builder.
+   * @param other The existing builder to copy.
+   * @return A new Employee RecordBuilder
+   */
+  public static com.baeldung.schema.Employee.Builder newBuilder(com.baeldung.schema.Employee.Builder other) {
+    return new com.baeldung.schema.Employee.Builder(other);
+  }
+
+  /**
+   * Creates a new Employee RecordBuilder by copying an existing Employee instance.
+   * @param other The existing instance to copy.
+   * @return A new Employee RecordBuilder
+   */
+  public static com.baeldung.schema.Employee.Builder newBuilder(com.baeldung.schema.Employee other) {
+    return new com.baeldung.schema.Employee.Builder(other);
+  }
+
+  /**
+   * RecordBuilder for Employee instances.
+   */
+  public static class Builder extends org.apache.avro.specific.SpecificRecordBuilderBase<Employee>
+    implements org.apache.avro.data.RecordBuilder<Employee> {
+
+    private int id;
+    private java.lang.CharSequence firstName;
+    private java.lang.CharSequence lastName;
+    private java.lang.CharSequence department;
+    private java.lang.CharSequence designation;
+
+    /** Creates a new Builder */
+    private Builder() {
+      super(SCHEMA$);
+    }
+
+    /**
+     * Creates a Builder by copying an existing Builder.
+     * @param other The existing Builder to copy.
+     */
+    private Builder(com.baeldung.schema.Employee.Builder other) {
+      super(other);
+      if (isValidValue(fields()[0], other.id)) {
+        this.id = data().deepCopy(fields()[0].schema(), other.id);
+        fieldSetFlags()[0] = true;
+      }
+      if (isValidValue(fields()[1], other.firstName)) {
+        this.firstName = data().deepCopy(fields()[1].schema(), other.firstName);
+        fieldSetFlags()[1] = true;
+      }
+      if (isValidValue(fields()[2], other.lastName)) {
+        this.lastName = data().deepCopy(fields()[2].schema(), other.lastName);
+        fieldSetFlags()[2] = true;
+      }
+      if (isValidValue(fields()[3], other.department)) {
+        this.department = data().deepCopy(fields()[3].schema(), other.department);
+        fieldSetFlags()[3] = true;
+      }
+      if (isValidValue(fields()[4], other.designation)) {
+        this.designation = data().deepCopy(fields()[4].schema(), other.designation);
+        fieldSetFlags()[4] = true;
+      }
+    }
+
+    /**
+     * Creates a Builder by copying an existing Employee instance
+     * @param other The existing instance to copy.
+     */
+    private Builder(com.baeldung.schema.Employee other) {
+            super(SCHEMA$);
+      if (isValidValue(fields()[0], other.id)) {
+        this.id = data().deepCopy(fields()[0].schema(), other.id);
+        fieldSetFlags()[0] = true;
+      }
+      if (isValidValue(fields()[1], other.firstName)) {
+        this.firstName = data().deepCopy(fields()[1].schema(), other.firstName);
+        fieldSetFlags()[1] = true;
+      }
+      if (isValidValue(fields()[2], other.lastName)) {
+        this.lastName = data().deepCopy(fields()[2].schema(), other.lastName);
+        fieldSetFlags()[2] = true;
+      }
+      if (isValidValue(fields()[3], other.department)) {
+        this.department = data().deepCopy(fields()[3].schema(), other.department);
+        fieldSetFlags()[3] = true;
+      }
+      if (isValidValue(fields()[4], other.designation)) {
+        this.designation = data().deepCopy(fields()[4].schema(), other.designation);
+        fieldSetFlags()[4] = true;
+      }
+    }
+
+    /**
+      * Gets the value of the 'id' field.
+      * @return The value.
+      */
+    public java.lang.Integer getId() {
+      return id;
+    }
+
+    /**
+      * Sets the value of the 'id' field.
+      * @param value The value of 'id'.
+      * @return This builder.
+      */
+    public com.baeldung.schema.Employee.Builder setId(int value) {
+      validate(fields()[0], value);
+      this.id = value;
+      fieldSetFlags()[0] = true;
+      return this;
+    }
+
+    /**
+      * Checks whether the 'id' field has been set.
+      * @return True if the 'id' field has been set, false otherwise.
+      */
+    public boolean hasId() {
+      return fieldSetFlags()[0];
+    }
+
+
+    /**
+      * Clears the value of the 'id' field.
+      * @return This builder.
+      */
+    public com.baeldung.schema.Employee.Builder clearId() {
+      fieldSetFlags()[0] = false;
+      return this;
+    }
+
+    /**
+      * Gets the value of the 'firstName' field.
+      * @return The value.
+      */
+    public java.lang.CharSequence getFirstName() {
+      return firstName;
+    }
+
+    /**
+      * Sets the value of the 'firstName' field.
+      * @param value The value of 'firstName'.
+      * @return This builder.
+      */
+    public com.baeldung.schema.Employee.Builder setFirstName(java.lang.CharSequence value) {
+      validate(fields()[1], value);
+      this.firstName = value;
+      fieldSetFlags()[1] = true;
+      return this;
+    }
+
+    /**
+      * Checks whether the 'firstName' field has been set.
+      * @return True if the 'firstName' field has been set, false otherwise.
+      */
+    public boolean hasFirstName() {
+      return fieldSetFlags()[1];
+    }
+
+
+    /**
+      * Clears the value of the 'firstName' field.
+      * @return This builder.
+      */
+    public com.baeldung.schema.Employee.Builder clearFirstName() {
+      firstName = null;
+      fieldSetFlags()[1] = false;
+      return this;
+    }
+
+    /**
+      * Gets the value of the 'lastName' field.
+      * @return The value.
+      */
+    public java.lang.CharSequence getLastName() {
+      return lastName;
+    }
+
+    /**
+      * Sets the value of the 'lastName' field.
+      * @param value The value of 'lastName'.
+      * @return This builder.
+      */
+    public com.baeldung.schema.Employee.Builder setLastName(java.lang.CharSequence value) {
+      validate(fields()[2], value);
+      this.lastName = value;
+      fieldSetFlags()[2] = true;
+      return this;
+    }
+
+    /**
+      * Checks whether the 'lastName' field has been set.
+      * @return True if the 'lastName' field has been set, false otherwise.
+      */
+    public boolean hasLastName() {
+      return fieldSetFlags()[2];
+    }
+
+
+    /**
+      * Clears the value of the 'lastName' field.
+      * @return This builder.
+      */
+    public com.baeldung.schema.Employee.Builder clearLastName() {
+      lastName = null;
+      fieldSetFlags()[2] = false;
+      return this;
+    }
+
+    /**
+      * Gets the value of the 'department' field.
+      * @return The value.
+      */
+    public java.lang.CharSequence getDepartment() {
+      return department;
+    }
+
+    /**
+      * Sets the value of the 'department' field.
+      * @param value The value of 'department'.
+      * @return This builder.
+      */
+    public com.baeldung.schema.Employee.Builder setDepartment(java.lang.CharSequence value) {
+      validate(fields()[3], value);
+      this.department = value;
+      fieldSetFlags()[3] = true;
+      return this;
+    }
+
+    /**
+      * Checks whether the 'department' field has been set.
+      * @return True if the 'department' field has been set, false otherwise.
+      */
+    public boolean hasDepartment() {
+      return fieldSetFlags()[3];
+    }
+
+
+    /**
+      * Clears the value of the 'department' field.
+      * @return This builder.
+      */
+    public com.baeldung.schema.Employee.Builder clearDepartment() {
+      department = null;
+      fieldSetFlags()[3] = false;
+      return this;
+    }
+
+    /**
+      * Gets the value of the 'designation' field.
+      * @return The value.
+      */
+    public java.lang.CharSequence getDesignation() {
+      return designation;
+    }
+
+    /**
+      * Sets the value of the 'designation' field.
+      * @param value The value of 'designation'.
+      * @return This builder.
+      */
+    public com.baeldung.schema.Employee.Builder setDesignation(java.lang.CharSequence value) {
+      validate(fields()[4], value);
+      this.designation = value;
+      fieldSetFlags()[4] = true;
+      return this;
+    }
+
+    /**
+      * Checks whether the 'designation' field has been set.
+      * @return True if the 'designation' field has been set, false otherwise.
+      */
+    public boolean hasDesignation() {
+      return fieldSetFlags()[4];
+    }
+
+
+    /**
+      * Clears the value of the 'designation' field.
+      * @return This builder.
+      */
+    public com.baeldung.schema.Employee.Builder clearDesignation() {
+      designation = null;
+      fieldSetFlags()[4] = false;
+      return this;
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public Employee build() {
+      try {
+        Employee record = new Employee();
+        record.id = fieldSetFlags()[0] ? this.id : (java.lang.Integer) defaultValue(fields()[0]);
+        record.firstName = fieldSetFlags()[1] ? this.firstName : (java.lang.CharSequence) defaultValue(fields()[1]);
+        record.lastName = fieldSetFlags()[2] ? this.lastName : (java.lang.CharSequence) defaultValue(fields()[2]);
+        record.department = fieldSetFlags()[3] ? this.department : (java.lang.CharSequence) defaultValue(fields()[3]);
+        record.designation = fieldSetFlags()[4] ? this.designation : (java.lang.CharSequence) defaultValue(fields()[4]);
+        return record;
+      } catch (java.lang.Exception e) {
+        throw new org.apache.avro.AvroRuntimeException(e);
+      }
+    }
+  }
+
+  @SuppressWarnings("unchecked")
+  private static final org.apache.avro.io.DatumWriter<Employee>
+    WRITER$ = (org.apache.avro.io.DatumWriter<Employee>)MODEL$.createDatumWriter(SCHEMA$);
+
+  @Override public void writeExternal(java.io.ObjectOutput out)
+    throws java.io.IOException {
+    WRITER$.write(this, SpecificData.getEncoder(out));
+  }
+
+  @SuppressWarnings("unchecked")
+  private static final org.apache.avro.io.DatumReader<Employee>
+    READER$ = (org.apache.avro.io.DatumReader<Employee>)MODEL$.createDatumReader(SCHEMA$);
+
+  @Override public void readExternal(java.io.ObjectInput in)
+    throws java.io.IOException {
+    READER$.read(this, SpecificData.getDecoder(in));
+  }
+
+}
diff --git a/spring-cloud/spring-cloud-stream/spring-cloud-stream-kafka/src/main/java/com/baeldung/schema/EmployeeKey.java b/spring-cloud/spring-cloud-stream/spring-cloud-stream-kafka/src/main/java/com/baeldung/schema/EmployeeKey.java
new file mode 100644
index 0000000000..bfd87751a4
--- /dev/null
+++ b/spring-cloud/spring-cloud-stream/spring-cloud-stream-kafka/src/main/java/com/baeldung/schema/EmployeeKey.java
@@ -0,0 +1,307 @@
+/**
+ * Autogenerated by Avro
+ *
+ * DO NOT EDIT DIRECTLY
+ */
+package com.baeldung.schema;
+
+import org.apache.avro.specific.SpecificData;
+import org.apache.avro.message.BinaryMessageEncoder;
+import org.apache.avro.message.BinaryMessageDecoder;
+import org.apache.avro.message.SchemaStore;
+
+@SuppressWarnings("all")
+@org.apache.avro.specific.AvroGenerated
+public class EmployeeKey extends org.apache.avro.specific.SpecificRecordBase implements org.apache.avro.specific.SpecificRecord {
+  private static final long serialVersionUID = 5288483459411046896L;
+  public static final org.apache.avro.Schema SCHEMA$ = new org.apache.avro.Schema.Parser().parse("{\"type\":\"record\",\"name\":\"EmployeeKey\",\"namespace\":\"com.baeldung.schema\",\"fields\":[{\"name\":\"id\",\"type\":\"int\"},{\"name\":\"departmentName\",\"type\":\"string\"}]}");
+  public static org.apache.avro.Schema getClassSchema() { return SCHEMA$; }
+
+  private static SpecificData MODEL$ = new SpecificData();
+
+  private static final BinaryMessageEncoder<EmployeeKey> ENCODER =
+      new BinaryMessageEncoder<EmployeeKey>(MODEL$, SCHEMA$);
+
+  private static final BinaryMessageDecoder<EmployeeKey> DECODER =
+      new BinaryMessageDecoder<EmployeeKey>(MODEL$, SCHEMA$);
+
+  /**
+   * Return the BinaryMessageDecoder instance used by this class.
+   */
+  public static BinaryMessageDecoder<EmployeeKey> getDecoder() {
+    return DECODER;
+  }
+
+  /**
+   * Create a new BinaryMessageDecoder instance for this class that uses the specified {@link SchemaStore}.
+   * @param resolver a {@link SchemaStore} used to find schemas by fingerprint
+   */
+  public static BinaryMessageDecoder<EmployeeKey> createDecoder(SchemaStore resolver) {
+    return new BinaryMessageDecoder<EmployeeKey>(MODEL$, SCHEMA$, resolver);
+  }
+
+  /** Serializes this EmployeeKey to a ByteBuffer. */
+  public java.nio.ByteBuffer toByteBuffer() throws java.io.IOException {
+    return ENCODER.encode(this);
+  }
+
+  /** Deserializes a EmployeeKey from a ByteBuffer. */
+  public static EmployeeKey fromByteBuffer(
+      java.nio.ByteBuffer b) throws java.io.IOException {
+    return DECODER.decode(b);
+  }
+
+  @Deprecated public int id;
+  @Deprecated public java.lang.CharSequence departmentName;
+
+  /**
+   * Default constructor.  Note that this does not initialize fields
+   * to their default values from the schema.  If that is desired then
+   * one should use <code>newBuilder()</code>.
+   */
+  public EmployeeKey() {}
+
+  /**
+   * All-args constructor.
+   * @param id The new value for id
+   * @param departmentName The new value for departmentName
+   */
+  public EmployeeKey(java.lang.Integer id, java.lang.CharSequence departmentName) {
+    this.id = id;
+    this.departmentName = departmentName;
+  }
+
+  public org.apache.avro.Schema getSchema() { return SCHEMA$; }
+  // Used by DatumWriter.  Applications should not call.
+  public java.lang.Object get(int field$) {
+    switch (field$) {
+    case 0: return id;
+    case 1: return departmentName;
+    default: throw new org.apache.avro.AvroRuntimeException("Bad index");
+    }
+  }
+
+  // Used by DatumReader.  Applications should not call.
+  @SuppressWarnings(value="unchecked")
+  public void put(int field$, java.lang.Object value$) {
+    switch (field$) {
+    case 0: id = (java.lang.Integer)value$; break;
+    case 1: departmentName = (java.lang.CharSequence)value$; break;
+    default: throw new org.apache.avro.AvroRuntimeException("Bad index");
+    }
+  }
+
+  /**
+   * Gets the value of the 'id' field.
+   * @return The value of the 'id' field.
+   */
+  public java.lang.Integer getId() {
+    return id;
+  }
+
+  /**
+   * Sets the value of the 'id' field.
+   * @param value the value to set.
+   */
+  public void setId(java.lang.Integer value) {
+    this.id = value;
+  }
+
+  /**
+   * Gets the value of the 'departmentName' field.
+   * @return The value of the 'departmentName' field.
+   */
+  public java.lang.CharSequence getDepartmentName() {
+    return departmentName;
+  }
+
+  /**
+   * Sets the value of the 'departmentName' field.
+   * @param value the value to set.
+   */
+  public void setDepartmentName(java.lang.CharSequence value) {
+    this.departmentName = value;
+  }
+
+  /**
+   * Creates a new EmployeeKey RecordBuilder.
+   * @return A new EmployeeKey RecordBuilder
+   */
+  public static com.baeldung.schema.EmployeeKey.Builder newBuilder() {
+    return new com.baeldung.schema.EmployeeKey.Builder();
+  }
+
+  /**
+   * Creates a new EmployeeKey RecordBuilder by copying an existing Builder.
+   * @param other The existing builder to copy.
+   * @return A new EmployeeKey RecordBuilder
+   */
+  public static com.baeldung.schema.EmployeeKey.Builder newBuilder(com.baeldung.schema.EmployeeKey.Builder other) {
+    return new com.baeldung.schema.EmployeeKey.Builder(other);
+  }
+
+  /**
+   * Creates a new EmployeeKey RecordBuilder by copying an existing EmployeeKey instance.
+   * @param other The existing instance to copy.
+   * @return A new EmployeeKey RecordBuilder
+   */
+  public static com.baeldung.schema.EmployeeKey.Builder newBuilder(com.baeldung.schema.EmployeeKey other) {
+    return new com.baeldung.schema.EmployeeKey.Builder(other);
+  }
+
+  /**
+   * RecordBuilder for EmployeeKey instances.
+   */
+  public static class Builder extends org.apache.avro.specific.SpecificRecordBuilderBase<EmployeeKey>
+    implements org.apache.avro.data.RecordBuilder<EmployeeKey> {
+
+    private int id;
+    private java.lang.CharSequence departmentName;
+
+    /** Creates a new Builder */
+    private Builder() {
+      super(SCHEMA$);
+    }
+
+    /**
+     * Creates a Builder by copying an existing Builder.
+     * @param other The existing Builder to copy.
+     */
+    private Builder(com.baeldung.schema.EmployeeKey.Builder other) {
+      super(other);
+      if (isValidValue(fields()[0], other.id)) {
+        this.id = data().deepCopy(fields()[0].schema(), other.id);
+        fieldSetFlags()[0] = true;
+      }
+      if (isValidValue(fields()[1], other.departmentName)) {
+        this.departmentName = data().deepCopy(fields()[1].schema(), other.departmentName);
+        fieldSetFlags()[1] = true;
+      }
+    }
+
+    /**
+     * Creates a Builder by copying an existing EmployeeKey instance
+     * @param other The existing instance to copy.
+     */
+    private Builder(com.baeldung.schema.EmployeeKey other) {
+            super(SCHEMA$);
+      if (isValidValue(fields()[0], other.id)) {
+        this.id = data().deepCopy(fields()[0].schema(), other.id);
+        fieldSetFlags()[0] = true;
+      }
+      if (isValidValue(fields()[1], other.departmentName)) {
+        this.departmentName = data().deepCopy(fields()[1].schema(), other.departmentName);
+        fieldSetFlags()[1] = true;
+      }
+    }
+
+    /**
+      * Gets the value of the 'id' field.
+      * @return The value.
+      */
+    public java.lang.Integer getId() {
+      return id;
+    }
+
+    /**
+      * Sets the value of the 'id' field.
+      * @param value The value of 'id'.
+      * @return This builder.
+      */
+    public com.baeldung.schema.EmployeeKey.Builder setId(int value) {
+      validate(fields()[0], value);
+      this.id = value;
+      fieldSetFlags()[0] = true;
+      return this;
+    }
+
+    /**
+      * Checks whether the 'id' field has been set.
+      * @return True if the 'id' field has been set, false otherwise.
+      */
+    public boolean hasId() {
+      return fieldSetFlags()[0];
+    }
+
+
+    /**
+      * Clears the value of the 'id' field.
+      * @return This builder.
+      */
+    public com.baeldung.schema.EmployeeKey.Builder clearId() {
+      fieldSetFlags()[0] = false;
+      return this;
+    }
+
+    /**
+      * Gets the value of the 'departmentName' field.
+      * @return The value.
+      */
+    public java.lang.CharSequence getDepartmentName() {
+      return departmentName;
+    }
+
+    /**
+      * Sets the value of the 'departmentName' field.
+      * @param value The value of 'departmentName'.
+      * @return This builder.
+      */
+    public com.baeldung.schema.EmployeeKey.Builder setDepartmentName(java.lang.CharSequence value) {
+      validate(fields()[1], value);
+      this.departmentName = value;
+      fieldSetFlags()[1] = true;
+      return this;
+    }
+
+    /**
+      * Checks whether the 'departmentName' field has been set.
+      * @return True if the 'departmentName' field has been set, false otherwise.
+      */
+    public boolean hasDepartmentName() {
+      return fieldSetFlags()[1];
+    }
+
+
+    /**
+      * Clears the value of the 'departmentName' field.
+      * @return This builder.
+      */
+    public com.baeldung.schema.EmployeeKey.Builder clearDepartmentName() {
+      departmentName = null;
+      fieldSetFlags()[1] = false;
+      return this;
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public EmployeeKey build() {
+      try {
+        EmployeeKey record = new EmployeeKey();
+        record.id = fieldSetFlags()[0] ? this.id : (java.lang.Integer) defaultValue(fields()[0]);
+        record.departmentName = fieldSetFlags()[1] ? this.departmentName : (java.lang.CharSequence) defaultValue(fields()[1]);
+        return record;
+      } catch (java.lang.Exception e) {
+        throw new org.apache.avro.AvroRuntimeException(e);
+      }
+    }
+  }
+
+  @SuppressWarnings("unchecked")
+  private static final org.apache.avro.io.DatumWriter<EmployeeKey>
+    WRITER$ = (org.apache.avro.io.DatumWriter<EmployeeKey>)MODEL$.createDatumWriter(SCHEMA$);
+
+  @Override public void writeExternal(java.io.ObjectOutput out)
+    throws java.io.IOException {
+    WRITER$.write(this, SpecificData.getEncoder(out));
+  }
+
+  @SuppressWarnings("unchecked")
+  private static final org.apache.avro.io.DatumReader<EmployeeKey>
+    READER$ = (org.apache.avro.io.DatumReader<EmployeeKey>)MODEL$.createDatumReader(SCHEMA$);
+
+  @Override public void readExternal(java.io.ObjectInput in)
+    throws java.io.IOException {
+    READER$.read(this, SpecificData.getDecoder(in));
+  }
+
+}