MODFQMMGR-391:Add endpoint to get latest query version

src/main/java/org/folio/fqm/resource/MigrationController.java

@@ -0,0 +1,18 @@
+package org.folio.fqm.resource;
+
+import lombok.RequiredArgsConstructor;
+import org.folio.fqm.service.MigrationService;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequiredArgsConstructor
+public class MigrationController implements QueryVersionApi {
+  private final MigrationService migrationService;
+
+  @Override
+  public ResponseEntity<Integer> getQueryVersion() {
+    return new ResponseEntity<>(migrationService.getLatestVersion(), HttpStatus.OK);
+  }
+}

src/main/java/org/folio/fqm/service/MigrationService.java

@@ -1,8 +1,13 @@
 package org.folio.fqm.service;
 
 import java.util.List;
+
+import lombok.RequiredArgsConstructor;
 import org.apache.commons.lang3.NotImplementedException;
+import org.springframework.stereotype.Service;
 
+@Service
+@RequiredArgsConstructor
 public class MigrationService {
 
   public int getLatestVersion() {

src/main/resources/swagger.api/mod-fqm-manager.yaml

@@ -62,7 +62,23 @@ paths:
           $ref: '#/components/responses/badRequestResponse'
         '500':
           $ref: '#/components/responses/internalServerErrorResponse'
-
+  /fqm/version:
+    get:
+      operationId: getQueryVersion
+      tags:
+        - queryVersion
+      description: Get the version of the fqm query.
+      responses:
+        '200':
+          description: 'Version of the fqm query'
+          content:
+            application/json:
+              schema:
+                type: integer
+        '400':
+          $ref: '#/components/responses/badRequestResponse'
+        '500':
+          $ref: '#/components/responses/internalServerErrorResponse'
 
 components:
   parameters:

src/test/java/org/folio/fqm/controller/MigrationControllerTest.java

@@ -0,0 +1,44 @@
+package org.folio.fqm.controller;
+
+import org.folio.fqm.resource.MigrationController;
+import org.folio.fqm.service.MigrationService;
+import org.folio.spring.FolioExecutionContext;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.RequestBuilder;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+
+import static org.mockito.Mockito.when;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+
+@WebMvcTest(MigrationController.class)
+class MigrationControllerTest {
+  private static final String GET_VERSION_URL = "/fqm/version";
+  @Autowired
+  private MockMvc mockMvc;
+
+  @MockBean
+  private MigrationService migrationService;
+
+  @MockBean
+  private FolioExecutionContext executionContext;
+
+  @Test
+  void shouldReturnQueryVersion() throws Exception {
+    String tenantId = "tenant_01";
+    when(executionContext.getTenantId()).thenReturn(tenantId);
+    when(migrationService.getLatestVersion()).thenReturn(1);
+    RequestBuilder builder = MockMvcRequestBuilders
+      .get(GET_VERSION_URL)
+      .accept(MediaType.APPLICATION_JSON);
+    mockMvc
+      .perform(builder)
+      .andExpect(status().isOk())
+      .andExpect(content().string(String.valueOf(1)));
+  }
+}