Add a statistical anonymous endpoint (#790)

Create a statistical anonymous endpoint returning the total number of users

iam-login-service/src/main/java/it/infn/mw/iam/core/IamStatisticalEndpoint.java

@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) Istituto Nazionale di Fisica Nucleare (INFN). 2016-2021
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package it.infn.mw.iam.core;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import it.infn.mw.iam.persistence.repository.IamAccountRepository;
+
+@RestController
+public class IamStatisticalEndpoint {
+
+  @Autowired
+  IamAccountRepository accountRepo;
+
+  @GetMapping("/stats")
+  public StatsEndpointResponse getStats() {
+    long count = accountRepo.count();
+    return new StatsEndpointResponse(count);
+  }
+}

iam-login-service/src/main/java/it/infn/mw/iam/core/StatsEndpointResponse.java

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+/**
+ * Copyright (c) Istituto Nazionale di Fisica Nucleare (INFN). 2016-2021
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package it.infn.mw.iam.core;
+
+public class StatsEndpointResponse {
+
+  private long numberOfUsers;
+
+  public StatsEndpointResponse(long numberOfUsers) {
+    this.numberOfUsers = numberOfUsers;
+  }
+
+  public long getNumberOfUsers() {
+    return numberOfUsers;
+  }
+
+  public void setNumberOfUsers(long numberOfUsers) {
+    this.numberOfUsers = numberOfUsers;
+  }
+}

iam-login-service/src/test/java/it/infn/mw/iam/test/core/IamStatisticalEndpointTests.java

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+/**
+ * Copyright (c) Istituto Nazionale di Fisica Nucleare (INFN). 2016-2021
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package it.infn.mw.iam.test.core;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertEquals;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+
+import it.infn.mw.iam.core.StatsEndpointResponse;
+import it.infn.mw.iam.test.util.annotation.IamMockMvcIntegrationTest;
+
+@RunWith(SpringRunner.class)
+@IamMockMvcIntegrationTest
+public class IamStatisticalEndpointTests {
+
+  @Autowired
+  protected MockMvc mvc;
+
+  @Test
+  public void anonymousisAcceptedAtStatEndpoint() throws Exception {
+    mvc.perform(get("/stats"))
+      .andDo(print())
+      .andExpect(status().isOk())
+      .andExpect(jsonPath("$.numberOfUsers", equalTo(255)));
+  }
+
+  @Test
+  public void testSetNumberOfUsers() {
+    StatsEndpointResponse userCount = new StatsEndpointResponse(0);
+    userCount.setNumberOfUsers(255);
+    assertEquals(255, userCount.getNumberOfUsers());
+  }
+
+}