Feature/gh 1283 exception (#1458)

* wrap errors in NativeEnvironmentRepository

spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/environment/EnvironmentController.java

@@ -275,6 +275,12 @@ public class EnvironmentController {
 		response.sendError(HttpStatus.BAD_REQUEST.value());
 	}
 
+	@ExceptionHandler(EnvironmentException.class)
+	public void environmentException(HttpServletResponse response, EnvironmentException e)
+			throws IOException {
+		response.sendError(HttpStatus.INTERNAL_SERVER_ERROR.value(), e.getMessage());
+	}
+
 	private void validateProfiles(String profiles) {
 		if (profiles.contains("-")) {
 			throw new IllegalArgumentException(

spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/environment/EnvironmentException.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2015-2019 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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 org.springframework.cloud.config.server.environment;
+
+/**
+ * @author Nicolas Homble
+ */
+@SuppressWarnings("serial")
+public class EnvironmentException extends RuntimeException {
+
+	public EnvironmentException(String string) {
+		super(string);
+	}
+
+	public EnvironmentException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+}

spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/environment/FailedToConstructEnvironmentException.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2015-2019 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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 org.springframework.cloud.config.server.environment;
+
+/**
+ * @author Nicolas Homble
+ *
+ */
+@SuppressWarnings("serial")
+public class FailedToConstructEnvironmentException extends EnvironmentException {
+
+	public FailedToConstructEnvironmentException(String string) {
+		super(string);
+	}
+
+	public FailedToConstructEnvironmentException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+}

spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/environment/NativeEnvironmentRepository.java

@@ -36,6 +36,7 @@ import org.springframework.boot.context.config.ConfigFileApplicationListener;
 import org.springframework.cloud.config.environment.Environment;
 import org.springframework.cloud.config.environment.PropertySource;
 import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.core.NestedExceptionUtils;
 import org.springframework.core.Ordered;
 import org.springframework.core.env.ConfigurableEnvironment;
 import org.springframework.core.env.MapPropertySource;
@@ -145,14 +146,19 @@ public class NativeEnvironmentRepository
 		// log levels in the caller)
 		builder.application()
 				.setListeners(Arrays.asList(new ConfigFileApplicationListener()));
-		ConfigurableApplicationContext context = builder.run(args);
-		environment.getPropertySources().remove("profiles");
-		try {
+
+		try (ConfigurableApplicationContext context = builder.run(args)) {
+			environment.getPropertySources().remove("profiles");
 			return clean(new PassthruEnvironmentRepository(environment).findOne(config,
 					profile, label, includeOrigin));
 		}
-		finally {
-			context.close();
+		catch (Exception e) {
+			String msg = String.format(
+					"Could not construct context for config=%s profile=%s label=%s includeOrigin=%b",
+					config, profile, label, includeOrigin);
+			String completeMessage = NestedExceptionUtils.buildMessage(msg,
+					NestedExceptionUtils.getMostSpecificCause(e));
+			throw new FailedToConstructEnvironmentException(completeMessage, e);
 		}
 	}
 

spring-cloud-config-server/src/test/java/org/springframework/cloud/config/server/environment/EnvironmentControllerTests.java

@@ -31,11 +31,14 @@ import org.springframework.cloud.config.environment.Environment;
 import org.springframework.cloud.config.environment.PropertySource;
 import org.springframework.http.MediaType;
 import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.MvcResult;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
 import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
 import org.springframework.test.web.servlet.setup.MockMvcBuilders;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
@@ -612,4 +615,17 @@ public class EnvironmentControllerTests {
 
 	}
 
+	@Test
+	public void handleEnvironmentException() throws Exception {
+		when(repository.findOne(eq("exception"), eq("bad-syntax.ext"), any(), eq(false)))
+				.thenThrow(new FailedToConstructEnvironmentException("Cannot construct",
+						new RuntimeException("underlier")));
+		MockMvc mvc = MockMvcBuilders.standaloneSetup(controller)
+				.setControllerAdvice(controller).build();
+		MvcResult result = mvc
+				.perform(MockMvcRequestBuilders.get("/exception/bad-syntax.ext"))
+				.andExpect(MockMvcResultMatchers.status().is(500)).andReturn();
+		assertThat(result.getResponse().getErrorMessage()).isEqualTo("Cannot construct");
+	}
+
 }

spring-cloud-config-server/src/test/java/org/springframework/cloud/config/server/environment/NativeEnvironmentRepositoryTests.java

@@ -26,6 +26,7 @@ import org.springframework.cloud.config.server.environment.SearchPathLocator.Loc
 import org.springframework.context.ConfigurableApplicationContext;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 
 /**
  * @author Dave Syer
@@ -219,4 +220,17 @@ public class NativeEnvironmentRepositoryTests {
 				.get(0).getSource().get("foo")).isEqualTo("test_bar");
 	}
 
+	@Test
+	public void duplicateYamlKeys() {
+		this.repository.setSearchLocations("classpath:/test/bad-syntax");
+		NativeEnvironmentRepository repo = this.repository;
+		assertThatExceptionOfType(FailedToConstructEnvironmentException.class)
+				.isThrownBy(() -> repo.findOne("foo", "master", "default")).withMessage(
+						"Could not construct context for config=foo profile=master label=default includeOrigin=false; nested exception is while constructing a mapping\n"
+								+ " in 'reader', line 1, column 1:\n" + "    key: value\n"
+								+ "    ^\n" + "found duplicate key key\n"
+								+ " in 'reader', line 2, column 1:\n" + "    key: value\n"
+								+ "    ^\n");
+	}
+
 }

spring-cloud-config-server/src/test/resources/test/bad-syntax/application.yml

@@ -0,0 +1,2 @@
+key: value
+key: value