Add validation for missing request URI

.changes/next-release/feature-AWSSDKforJavav2-7cf1e5c.json

@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "AWS SDK for Java v2",
+    "contributor": "",
+    "description": "Add code generation validation for missing request URI on an operation."
+}

codegen-maven-plugin/src/main/java/software/amazon/awssdk/codegen/maven/plugin/GenerationMojo.java

@@ -17,6 +17,8 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.io.Writer;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
@@ -35,6 +37,7 @@
 import software.amazon.awssdk.codegen.C2jModels;
 import software.amazon.awssdk.codegen.CodeGenerator;
 import software.amazon.awssdk.codegen.IntermediateModelBuilder;
+import software.amazon.awssdk.codegen.internal.Jackson;
 import software.amazon.awssdk.codegen.internal.Utils;
 import software.amazon.awssdk.codegen.model.config.customization.CustomizationConfig;
 import software.amazon.awssdk.codegen.model.intermediate.IntermediateModel;
@@ -44,6 +47,8 @@
 import software.amazon.awssdk.codegen.model.service.ServiceModel;
 import software.amazon.awssdk.codegen.model.service.Waiters;
 import software.amazon.awssdk.codegen.utils.ModelLoaderUtils;
+import software.amazon.awssdk.codegen.validation.ModelInvalidException;
+import software.amazon.awssdk.codegen.validation.ModelValidationReport;
 import software.amazon.awssdk.utils.StringUtils;
 
 /**
@@ -84,7 +89,18 @@ public void execute() throws MojoExecutionException {
         this.resourcesDirectory = Paths.get(outputDirectory).resolve("generated-resources").resolve("sdk-resources");
         this.testsDirectory = Paths.get(outputDirectory).resolve("generated-test-sources").resolve("sdk-tests");
 
-        List<GenerationParams> generationParams = initGenerationParams();
+        List<GenerationParams> generationParams;
+
+        try {
+            generationParams = initGenerationParams();
+        } catch (ModelInvalidException e) {
+            if (writeValidationReport) {
+                ModelValidationReport report = new ModelValidationReport();
+                report.setValidationEntries(e.validationEntries());
+                emitValidationReport(report);
+            }
+            throw e;
+        }
 
         Map<String, IntermediateModel> serviceNameToModelMap = new HashMap<>();
 
@@ -137,6 +153,8 @@ private List<GenerationParams> initGenerationParams() throws MojoExecutionExcept
         }).collect(Collectors.toList());
     }
 
+
+
     private Stream<ModelRoot> findModelRoots() throws MojoExecutionException {
         try {
             return Files.find(codeGenResources.toPath(), 10, this::isModelFile)
@@ -216,6 +234,17 @@ private <T> Optional<T> loadOptionalModel(Class<T> clzz, Path location) {
         return ModelLoaderUtils.loadOptionalModel(clzz, location.toFile());
     }
 
+    private void emitValidationReport(ModelValidationReport report) {
+        Path modelsDir = sourcesDirectory.resolve("models");
+        try {
+            Writer writer = Files.newBufferedWriter(modelsDir.resolve("validation-report.json"),
+                                                    StandardCharsets.UTF_8);
+            Jackson.writeWithObjectMapper(report, writer);
+        } catch (IOException e) {
+            getLog().warn("Failed to write validation report to " + modelsDir, e);
+        }
+    }
+
     private static class ModelRoot {
         private final Path modelRoot;
         private final CustomizationConfig customizationConfig;

codegen/src/main/java/software/amazon/awssdk/codegen/AddShapes.java

@@ -21,6 +21,7 @@
 import static software.amazon.awssdk.codegen.internal.Utils.isMapShape;
 import static software.amazon.awssdk.codegen.internal.Utils.isScalar;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -37,9 +38,14 @@
 import software.amazon.awssdk.codegen.model.intermediate.VariableModel;
 import software.amazon.awssdk.codegen.model.service.Location;
 import software.amazon.awssdk.codegen.model.service.Member;
+import software.amazon.awssdk.codegen.model.service.Operation;
 import software.amazon.awssdk.codegen.model.service.ServiceModel;
 import software.amazon.awssdk.codegen.model.service.Shape;
 import software.amazon.awssdk.codegen.naming.NamingStrategy;
+import software.amazon.awssdk.codegen.validation.ModelInvalidException;
+import software.amazon.awssdk.codegen.validation.ValidationEntry;
+import software.amazon.awssdk.codegen.validation.ValidationErrorId;
+import software.amazon.awssdk.codegen.validation.ValidationErrorSeverity;
 import software.amazon.awssdk.utils.StringUtils;
 import software.amazon.awssdk.utils.Validate;
 
@@ -345,11 +351,20 @@ private boolean isGreedy(Shape parentShape, Map<String, Shape> allC2jShapes, Par
      * @throws RuntimeException If operation can't be found.
      */
     private String findRequestUri(Shape parentShape, Map<String, Shape> allC2jShapes) {
-        return builder.getService().getOperations().values().stream()
-                .filter(o -> o.getInput() != null)
-                .filter(o -> allC2jShapes.get(o.getInput().getShape()).equals(parentShape))
-                .map(o -> o.getHttp().getRequestUri())
-                .findFirst().orElseThrow(() -> new RuntimeException("Could not find request URI for input shape"));
+        Optional<Operation> operation = builder.getService().getOperations().values().stream()
+                                               .filter(o -> o.getInput() != null)
+                                               .filter(o -> allC2jShapes.get(o.getInput().getShape()).equals(parentShape))
+                                               .findFirst();
+
+        return operation.map(o -> o.getHttp().getRequestUri())
+                        .orElseThrow(() -> {
+                            String detailMsg = "Could not find request URI for input shape";
+                            ValidationEntry entry =
+                                new ValidationEntry().withErrorId(ValidationErrorId.REQUEST_URI_NOT_FOUND)
+                                                     .withDetailMessage(detailMsg)
+                                                     .withSeverity(ValidationErrorSeverity.DANGER);
+                            return ModelInvalidException.builder().validationEntries(Collections.singletonList(entry)).build();
+                        });
     }
 
     private String deriveUnmarshallerLocationName(Shape memberShape, String memberName, Member member) {

codegen/src/main/java/software/amazon/awssdk/codegen/validation/ValidationErrorId.java

@@ -21,6 +21,7 @@ public enum ValidationErrorId {
         + " files generated by the code generator."
     ),
     UNKNOWN_SHAPE_MEMBER("The model references an unknown shape member."),
+    REQUEST_URI_NOT_FOUND("The request URI does not exist."),
     ;
 
     private final String description;

codegen/src/test/java/software/amazon/awssdk/codegen/CodeGeneratorTest.java

@@ -40,8 +40,10 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import software.amazon.awssdk.codegen.internal.Jackson;
+import software.amazon.awssdk.codegen.model.config.customization.CustomizationConfig;
 import software.amazon.awssdk.codegen.model.intermediate.IntermediateModel;
 import software.amazon.awssdk.codegen.model.rules.endpoints.EndpointTestSuiteModel;
+import software.amazon.awssdk.codegen.model.service.ServiceModel;
 import software.amazon.awssdk.codegen.poet.ClientTestModels;
 import software.amazon.awssdk.codegen.validation.ModelInvalidException;
 import software.amazon.awssdk.codegen.validation.ModelValidator;
@@ -155,6 +157,19 @@ void execute_endpointsTestReferencesUnknownOperationMember_throwsValidationError
             });
     }
 
+    @Test
+    void execute_operationHasNoRequestUri_throwsValidationError() throws IOException {
+        C2jModels models = C2jModels.builder()
+                                    .customizationConfig(CustomizationConfig.create())
+                                    .serviceModel(getMissingRequestUriServiceModel())
+                                    .build();
+
+        assertThatThrownBy(() -> generateCodeFromC2jModels(models, outputDir, true, Collections.emptyList()))
+            .isInstanceOf(ModelInvalidException.class)
+            .matches(e -> ((ModelInvalidException) e).validationEntries().get(0).getErrorId()
+                          == ValidationErrorId.REQUEST_URI_NOT_FOUND);
+    }
+
     private void generateCodeFromC2jModels(C2jModels c2jModels, Path outputDir) {
         generateCodeFromC2jModels(c2jModels, outputDir, false, null);
     }
@@ -201,17 +216,28 @@ private static Path validationReportPath(Path root) {
     }
 
     private EndpointTestSuiteModel getBrokenEndpointTestSuiteModel() throws IOException {
-        InputStream resourceAsStream = getClass().getResourceAsStream("incorrect-endpoint-tests.json");
-        ByteArrayOutputStream baos = new ByteArrayOutputStream();
-        byte[] buffer = new byte[1024];
-        int read;
-        while ((read = resourceAsStream.read(buffer)) != -1) {
-            baos.write(buffer, 0, read);
-        }
-        String json = StandardCharsets.UTF_8.decode(ByteBuffer.wrap(baos.toByteArray())).toString();
+        String json = resourceAsString("incorrect-endpoint-tests.json");
         return Jackson.load(EndpointTestSuiteModel.class, json);
     }
 
+    private ServiceModel getMissingRequestUriServiceModel() throws IOException {
+        String json = resourceAsString("no-request-uri-operation-service.json");
+        return Jackson.load(ServiceModel.class, json);
+    }
+
+    private String resourceAsString(String name) throws IOException {
+        ByteArrayOutputStream baos;
+        try (InputStream resourceAsStream = getClass().getResourceAsStream(name)) {
+            baos = new ByteArrayOutputStream();
+            byte[] buffer = new byte[1024];
+            int read;
+            while ((read = resourceAsStream.read(buffer)) != -1) {
+                baos.write(buffer, 0, read);
+            }
+        }
+        return StandardCharsets.UTF_8.decode(ByteBuffer.wrap(baos.toByteArray())).toString();
+    }
+
     private static void deleteDirectory(Path dir) throws IOException {
         Files.walkFileTree(dir, new FileVisitor<Path>() {
 

codegen/src/test/resources/software/amazon/awssdk/codegen/no-request-uri-operation-service.json

@@ -0,0 +1,43 @@
+{
+  "version": "2.0",
+  "metadata": {
+    "apiVersion": "2010-05-08",
+    "endpointPrefix": "json-service-endpoint",
+    "globalEndpoint": "json-service.amazonaws.com",
+    "protocol": "rest-json",
+    "serviceAbbreviation": "Rest Json Service",
+    "serviceFullName": "Some Service That Uses Rest-Json Protocol",
+    "serviceId": "Rest Json Service",
+    "signingName": "json-service",
+    "signatureVersion": "v4",
+    "uid": "json-service-2010-05-08",
+    "xmlNamespace": "https://json-service.amazonaws.com/doc/2010-05-08/"
+  },
+  "operations": {
+    "OperationWithUriMappedParam": {
+      "name": "OperationWithUriMappedParam",
+      "http": {
+        "method": "GET"
+      },
+      "input": {
+        "shape": "OperationWithUriMappedParamRequest"
+      }
+    }
+  },
+  "shapes": {
+    "OperationWithUriMappedParamRequest": {
+      "type": "structure",
+      "members": {
+        "StringMember": {
+          "shape": "String",
+          "location": "uri",
+          "locationName": "stringMember"
+        }
+      }
+    },
+    "String": {
+      "type": "string"
+    }
+  },
+  "documentation": "A service that is implemented using the rest-json protocol"
+}