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[java][Microprofile] add config options to disable usage of ApiExceptionMapper #20762

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[java][Microprofile] add config options to disable usage of ApiExcept…
JacobOJ Mar 3, 2025
8db111d
Update modules/openapi-generator/src/main/java/org/openapitools/codeg…
JacobOJ Mar 13, 2025
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2 changes: 2 additions & 0 deletions docs/generators/java-microprofile.md
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Expand Up @@ -66,7 +66,9 @@ These options may be applied as additional-properties (cli) or configOptions (pl
|licenseName|The name of the license| |Unlicense|
|licenseUrl|The URL of the license| |http://unlicense.org|
|microprofileFramework|Framework for microprofile. Possible values "kumuluzee"| |null|
|microprofileGlobalExceptionMapper|Should ApiExceptionMapper be annotated with @Provider making it a global exception mapper| |true|
|microprofileMutiny|Whether to use async types for microprofile (currently only Smallrye Mutiny is supported).| |null|
|microprofileRegisterExceptionMapper|Should generated API Clients be annotated with @RegisterProvider(ApiExceptionMapper.class).| |true|
|microprofileRestClientVersion|Version of MicroProfile Rest Client API.| |null|
|modelPackage|package for generated models| |org.openapitools.client.model|
|openApiNullable|Enable OpenAPI Jackson Nullable library. Not supported by `microprofile` library.| |true|
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2 changes: 2 additions & 0 deletions docs/generators/java.md
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Expand Up @@ -66,7 +66,9 @@ These options may be applied as additional-properties (cli) or configOptions (pl
|licenseName|The name of the license| |Unlicense|
|licenseUrl|The URL of the license| |http://unlicense.org|
|microprofileFramework|Framework for microprofile. Possible values "kumuluzee"| |null|
|microprofileGlobalExceptionMapper|Should ApiExceptionMapper be annotated with @Provider making it a global exception mapper| |true|
|microprofileMutiny|Whether to use async types for microprofile (currently only Smallrye Mutiny is supported).| |null|
|microprofileRegisterExceptionMapper|Should generated API Clients be annotated with @RegisterProvider(ApiExceptionMapper.class).| |true|
|microprofileRestClientVersion|Version of MicroProfile Rest Client API.| |null|
|modelPackage|package for generated models| |org.openapitools.client.model|
|openApiNullable|Enable OpenAPI Jackson Nullable library. Not supported by `microprofile` library.| |true|
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12 changes: 12 additions & 0 deletions ...openapi-generator/src/main/java/org/openapitools/codegen/languages/JavaClientCodegen.java
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Expand Up @@ -70,6 +70,8 @@ public class JavaClientCodegen extends AbstractJavaCodegen
public static final String CASE_INSENSITIVE_RESPONSE_HEADERS = "caseInsensitiveResponseHeaders";
public static final String MICROPROFILE_FRAMEWORK = "microprofileFramework";
public static final String MICROPROFILE_MUTINY = "microprofileMutiny";
public static final String MICROPROFILE_GLOBAL_EXCEPTION_MAPPER = "microprofileGlobalExceptionMapper";
public static final String MICROPROFILE_REGISTER_EXCEPTION_MAPPER = "microprofileRegisterExceptionMapper";
public static final String USE_ABSTRACTION_FOR_FILES = "useAbstractionForFiles";
public static final String DYNAMIC_OPERATIONS = "dynamicOperations";
public static final String SUPPORT_STREAMING = "supportStreaming";
Expand Down Expand Up @@ -118,6 +120,8 @@ public class JavaClientCodegen extends AbstractJavaCodegen
@Setter protected String microprofileFramework = MICROPROFILE_DEFAULT;
@Setter protected String microprofileRestClientVersion = MICROPROFILE_REST_CLIENT_DEFAULT_VERSION;
@Setter protected boolean microprofileMutiny = false;
@Setter protected boolean microProfileGlobalExceptionMapper = true;
@Setter protected boolean microProfileRegisterExceptionMapper = true;
@Setter protected String configKey = null;
@Setter(AccessLevel.PRIVATE) protected boolean configKeyFromClassName = false;

Expand Down Expand Up @@ -226,6 +230,8 @@ public JavaClientCodegen() {
cliOptions.add(CliOption.newBoolean(CASE_INSENSITIVE_RESPONSE_HEADERS, "Make API response's headers case-insensitive. Available on " + OKHTTP_GSON + ", " + JERSEY2 + " libraries"));
cliOptions.add(CliOption.newString(MICROPROFILE_FRAMEWORK, "Framework for microprofile. Possible values \"kumuluzee\""));
cliOptions.add(CliOption.newString(MICROPROFILE_MUTINY, "Whether to use async types for microprofile (currently only Smallrye Mutiny is supported)."));
cliOptions.add(CliOption.newString(MICROPROFILE_REGISTER_EXCEPTION_MAPPER, "Should generated API Clients be annotated with @RegisterProvider(ApiExceptionMapper.class).").defaultValue("true"));
cliOptions.add(CliOption.newString(MICROPROFILE_GLOBAL_EXCEPTION_MAPPER, "Should ApiExceptionMapper be annotated with @Provider making it a global exception mapper").defaultValue("true"));
cliOptions.add(CliOption.newBoolean(USE_ABSTRACTION_FOR_FILES, "Use alternative types instead of java.io.File to allow passing bytes without a file on disk. Available on resttemplate, webclient, restclient, libraries"));
cliOptions.add(CliOption.newBoolean(DYNAMIC_OPERATIONS, "Generate operations dynamically at runtime from an OAS", this.dynamicOperations));
cliOptions.add(CliOption.newBoolean(SUPPORT_STREAMING, "Support streaming endpoint (beta)", this.supportStreaming));
Expand Down Expand Up @@ -375,6 +381,12 @@ public void processOpts() {
}
convertPropertyToStringAndWriteBack(MICROPROFILE_FRAMEWORK, this::setMicroprofileFramework);

convertPropertyToBooleanAndWriteBack(MICROPROFILE_GLOBAL_EXCEPTION_MAPPER, this::setMicroProfileGlobalExceptionMapper);
convertPropertyToBooleanAndWriteBack(MICROPROFILE_REGISTER_EXCEPTION_MAPPER, this::setMicroProfileRegisterExceptionMapper);

additionalProperties.put(MICROPROFILE_REGISTER_EXCEPTION_MAPPER, microProfileRegisterExceptionMapper);
additionalProperties.put(MICROPROFILE_GLOBAL_EXCEPTION_MAPPER, microProfileGlobalExceptionMapper);
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are these 2 lines still needed? don't see these 2 lines for other options.

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I believe so. If these lines are removed the parameters default to false

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I was curious and checked. @JacobOJ is right and these lines are needed - because in contrast to most other options, here the default is true instead of false. Not setting anything implicitly means false, which matches the intended default in most cases, but not here. Just for future reference :)


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i think you will need to follow how the rest of microprofile options are set:

        convertPropertyToBooleanAndWriteBack(MICROPROFILE_MUTINY, this::setMicroprofileMutiny);

        convertPropertyToStringAndWriteBack(MICROPROFILE_REST_CLIENT_VERSION, value->microprofileRestClientVersion=value);

as my test shows setting these options to false have no effect in the output

did you test the options locally by setting them to false?

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@wing328 Yes, you were right. I changed the code and tested the cli locally.

It works as expected now

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👍

i'll run some tests later this week and merge if no more question from me or the community

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tested with the following:

java -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar generate -g java --library microprofile -i modules/openapi-generator/src/test/resources/3_0/petstore.yaml -o /tmp/microprofile2/ --additional-properties microProfileGlobalExceptionMapper=false,microProfileRegisterExceptionMapper=false

but didn't notice anything change in the output compared with no additional properties

do these 2 options work for you locally?

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I believe it is because of a capitalization error in the input. I just tested, and it works as expected with a lowercase p in microprofile.

This works

java -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar generate -g java --library microprofile -i modules/openapi-generator/src/test/resources/3_0/petstore.yaml -o /tmp/microprofile2/ --additional-properties microprofileGlobalExceptionMapper=false,microprofileRegisterExceptionMapper=false

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@wing328 Can you take another look?

convertPropertyToBooleanAndWriteBack(MICROPROFILE_MUTINY, this::setMicroprofileMutiny);

convertPropertyToStringAndWriteBack(MICROPROFILE_REST_CLIENT_VERSION, value->microprofileRestClientVersion=value);
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4 changes: 4 additions & 0 deletions modules/openapi-generator/src/main/resources/Java/libraries/microprofile/api.mustache
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Expand Up @@ -24,7 +24,9 @@ import {{rootJavaEEPackage}}.validation.constraints.*;
import {{rootJavaEEPackage}}.validation.Valid;
{{/useBeanValidation}}

{{#microprofileRegisterExceptionMapper}}
import org.eclipse.microprofile.rest.client.annotation.RegisterProvider;
{{/microprofileRegisterExceptionMapper}}
import org.eclipse.microprofile.rest.client.inject.RegisterRestClient;

{{#appName}}
Expand All @@ -41,7 +43,9 @@ import org.eclipse.microprofile.rest.client.inject.RegisterRestClient;
{{^microprofileServer}}
@RegisterRestClient{{#configKey}}(configKey="{{configKey}}"){{/configKey}}{{#configKeyFromClassName}}{{#operations}}(configKey="{{configKey}}"){{/operations}}{{/configKeyFromClassName}}
{{/microprofileServer}}
{{#microprofileRegisterExceptionMapper}}
@RegisterProvider(ApiExceptionMapper.class)
{{/microprofileRegisterExceptionMapper}}
@Path("{{#useAnnotatedBasePath}}{{contextPath}}{{/useAnnotatedBasePath}}{{commonPath}}")
public interface {{classname}} {
{{#operations}}
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4 changes: 4 additions & 0 deletions ...pi-generator/src/main/resources/Java/libraries/microprofile/api_exception_mapper.mustache
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Expand Up @@ -3,10 +3,14 @@ package {{apiPackage}};

import {{rootJavaEEPackage}}.ws.rs.core.MultivaluedMap;
import {{rootJavaEEPackage}}.ws.rs.core.Response;
{{#microprofileGlobalExceptionMapper}}
import {{rootJavaEEPackage}}.ws.rs.ext.Provider;
{{/microprofileGlobalExceptionMapper}}
import org.eclipse.microprofile.rest.client.ext.ResponseExceptionMapper;

{{#microprofileGlobalExceptionMapper}}
@Provider
{{/microprofileGlobalExceptionMapper}}
public class ApiExceptionMapper
implements ResponseExceptionMapper<ApiException> {

Expand Down
111 changes: 110 additions & 1 deletion ...st/java/org/openapitools/codegen/java/microprofile/JavaMicroprofileServerCodegenTest.java
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Expand Up @@ -7,6 +7,7 @@
import org.openapitools.codegen.CodegenConstants;
import org.openapitools.codegen.DefaultGenerator;
import org.openapitools.codegen.java.assertions.JavaFileAssert;
import org.openapitools.codegen.languages.JavaClientCodegen;
import org.openapitools.codegen.languages.JavaMicroprofileServerCodegen;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
Expand Down Expand Up @@ -127,4 +128,112 @@ public void testMicroprofileCanHandleCookieParamsSingleRequest() throws Exceptio
.assertInnerClass("GetCustomerRequest")
.assertMethod("cookieParameter");
}
}

@Test
public void testGeneratedApiHasApiExceptionMapperRegisteredWhenUsingDefaultConfiguration() throws Exception {
File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
output.deleteOnExit();

OpenAPI openAPI = new OpenAPIParser()
.readLocation("src/test/resources/bugs/microprofile_cookie.yaml", null, new ParseOptions()).getOpenAPI();

codegen.setOutputDir(output.getAbsolutePath());

ClientOptInput input = new ClientOptInput()
.openAPI(openAPI)
.config(codegen);

List<File> files = new DefaultGenerator().opts(input).generate();

Map<String, File> filesMap = files.stream()
.collect(Collectors.toMap(File::getName, Function.identity()));

validateJavaSourceFiles(files);

JavaFileAssert.assertThat(filesMap.get("DefaultApi.java"))
.assertTypeAnnotations()
.containsWithName("RegisterProvider")
.containsWithNameAndAttributes("RegisterProvider", Map.of("value", "ApiExceptionMapper.class"));
}

@Test
public void testGeneratedApiDoesNotHaveApiExceptionMapperRegisteredWhenDisablingItInConfiguration() throws Exception {
File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
output.deleteOnExit();

OpenAPI openAPI = new OpenAPIParser()
.readLocation("src/test/resources/bugs/microprofile_cookie.yaml", null, new ParseOptions()).getOpenAPI();

codegen.setOutputDir(output.getAbsolutePath());
codegen.additionalProperties().put(JavaClientCodegen.MICROPROFILE_REGISTER_EXCEPTION_MAPPER, "false");

ClientOptInput input = new ClientOptInput()
.openAPI(openAPI)
.config(codegen);

List<File> files = new DefaultGenerator().opts(input).generate();

Map<String, File> filesMap = files.stream()
.collect(Collectors.toMap(File::getName, Function.identity()));

validateJavaSourceFiles(files);

JavaFileAssert.assertThat(filesMap.get("DefaultApi.java"))
.assertTypeAnnotations()
.doesNotContainWithName("RegisterProvider");
}

@Test
public void testGeneratedApiExceptionMapperHasProviderAnnotationWhenUsingDefaultConfiguration() throws Exception {
File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
output.deleteOnExit();

OpenAPI openAPI = new OpenAPIParser()
.readLocation("src/test/resources/bugs/microprofile_cookie.yaml", null, new ParseOptions()).getOpenAPI();

codegen.setOutputDir(output.getAbsolutePath());

ClientOptInput input = new ClientOptInput()
.openAPI(openAPI)
.config(codegen);

List<File> files = new DefaultGenerator().opts(input).generate();

Map<String, File> filesMap = files.stream()
.collect(Collectors.toMap(File::getName, Function.identity()));

validateJavaSourceFiles(files);

JavaFileAssert.assertThat(filesMap.get("ApiExceptionMapper.java"))
.assertTypeAnnotations()
.containsWithName("Provider");
}

@Test
public void testGeneratedApiExceptionMapperDoesNotHaveProviderAnnotationWhenDisablingItInConfiguration() throws Exception {
File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
output.deleteOnExit();

OpenAPI openAPI = new OpenAPIParser()
.readLocation("src/test/resources/bugs/microprofile_cookie.yaml", null, new ParseOptions()).getOpenAPI();

codegen.setOutputDir(output.getAbsolutePath());
codegen.additionalProperties().put(JavaClientCodegen.MICROPROFILE_GLOBAL_EXCEPTION_MAPPER, "false");

ClientOptInput input = new ClientOptInput()
.openAPI(openAPI)
.config(codegen);

List<File> files = new DefaultGenerator().opts(input).generate();

Map<String, File> filesMap = files.stream()
.collect(Collectors.toMap(File::getName, Function.identity()));

validateJavaSourceFiles(files);

JavaFileAssert.assertThat(filesMap.get("ApiExceptionMapper.java"))
.assertTypeAnnotations()
.doesNotContainWithName("Provider");
}
}

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