org.bremersee.exception.RestApiExceptionMapperProperties Maven / Gradle / Ivy
/*
* Copyright 2018 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
*
* 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 org.bremersee.exception;
import java.util.ArrayList;
import java.util.List;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import lombok.ToString;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.http.HttpStatus;
/**
* Configuration properties for the rest api exception handler / resolver.
*
* @author Christian Bremer
*/
@SuppressWarnings("ConfigurationProperties")
@ConfigurationProperties(prefix = "bremersee.exception-mapping")
@Data
public class RestApiExceptionMapperProperties {
/**
* The request paths the handler is responsible for. Default is empty.
*/
private List apiPaths = new ArrayList<>();
/**
* The default values of a rest api exception that will be set, if a value is not detected. The
* default values are:
*
*
*
* attribute
* value
*
*
*
*
* status
* 500
*
*
* message
* Internal Server Error
*
*
* code
* UNSPECIFIED
*
*
*
*/
private ExceptionMapping defaultExceptionMapping;
/**
* Values of errors whose values can not be determined automatically. The name of the
* exception can be a package, too (e. g. org.bremersee.foobar.*).
*
* Examples application.yml:
*
* bremersee:
* exception-mapping:
* exception-mappings:
* - exception-class-name: org.springframework.security.access.AccessDeniedException
* status: 403
* message: Forbidden
* code: XYZ:0815
* - exception-class-name: javax.persistence.EntityNotFoundException
* status: 404
* message: Not Found
* code: GEN:404
*
*/
private List exceptionMappings = new ArrayList<>();
/**
* The default configuration of the exception mapping.
*
*
*
*
* attribute
* value
*
*
*
*
* includeExceptionClassName
* true
*
*
* includeApplicationName
* true
*
*
* includePath
* true
*
*
* includeHandler
* false
*
*
* includeStackTrace
* false
*
*
* includeCause
* true
*
*
* evaluateAnnotationFirst
* false
*
*
*
*
* If two values of a key are available (e. g. per annotation (see {@link
* org.springframework.web.bind.annotation.ResponseStatus}) and member attribute) it is possible
* with {@code evaluateAnnotationFirst} to specify which one should be used.
*/
private ExceptionMappingConfig defaultExceptionMappingConfig;
/**
* Specifies mapping configuration per exception class. The name of the exception can be a
* package, too (e. g. org.bremersee.foobar.*).
*
*
Examples application.yml:
*
* bremersee:
* exception-mapping:
* exception-mapping-configs:
* - exception-class-name: org.springframework.security.access.AccessDeniedException
* include-exception-class-name: false
* include-handler: true
* include-cause: true
* - exception-class-name: org.springframework.*
* include-exception-class-name: true
* include-handler: true
* include-cause: false
*
*/
private List exceptionMappingConfigs = new ArrayList<>();
/**
* Instantiates rest api exception mapper properties.
*/
public RestApiExceptionMapperProperties() {
defaultExceptionMapping = new ExceptionMapping();
defaultExceptionMapping.setCode(null);
defaultExceptionMapping.setMessage(HttpStatus.INTERNAL_SERVER_ERROR.getReasonPhrase());
defaultExceptionMapping.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
defaultExceptionMapping.setExceptionClassName("*");
defaultExceptionMappingConfig = new ExceptionMappingConfig();
exceptionMappings.add(new ExceptionMapping(
IllegalArgumentException.class.getName(),
HttpStatus.BAD_REQUEST,
null));
exceptionMappings.add(new ExceptionMapping(
"org.springframework.security.access.AccessDeniedException",
HttpStatus.FORBIDDEN,
null));
exceptionMappings.add(new ExceptionMapping(
"javax.persistence.EntityNotFoundException",
HttpStatus.NOT_FOUND,
null));
}
/**
* Find exception mapping.
*
* @param throwable the throwable
* @return the exception mapping
*/
@SuppressWarnings("WeakerAccess")
public ExceptionMapping findExceptionMapping(Throwable throwable) {
return getExceptionMappings()
.stream()
.filter(exceptionMapping -> matches(
throwable, exceptionMapping.getExceptionClassName()))
.findFirst()
.orElseGet(this::getDefaultExceptionMapping);
}
/**
* Find exception mapping config.
*
* @param throwable the throwable
* @return the exception mapping config
*/
@SuppressWarnings("WeakerAccess")
public ExceptionMappingConfig findExceptionMappingConfig(
final Throwable throwable) {
return getExceptionMappingConfigs()
.stream()
.filter(exceptionMappingConfig -> matches(
throwable, exceptionMappingConfig.getExceptionClassName()))
.findFirst()
.orElseGet(this::getDefaultExceptionMappingConfig);
}
private boolean matches(final Throwable throwable, final String exceptionClassName) {
if (throwable == null || exceptionClassName == null) {
return false;
}
if (throwable.getClass().getName().equals(exceptionClassName)) {
return true;
}
if (exceptionClassName.endsWith(".*")) {
final String packagePrefix = exceptionClassName.substring(0, exceptionClassName.length() - 1);
if (throwable.getClass().getName().startsWith(packagePrefix)) {
return true;
}
}
if (matches(throwable.getCause(), exceptionClassName)) {
return true;
}
return matches(throwable.getClass().getSuperclass(), exceptionClassName);
}
private boolean matches(final Class exceptionClass, final String exceptionClassName) {
if (exceptionClass == null || exceptionClassName == null) {
return false;
}
if (exceptionClass.getName().equals(exceptionClassName)) {
return true;
}
if (exceptionClassName.endsWith(".*")) {
final String packagePrefix = exceptionClassName.substring(0, exceptionClassName.length() - 1);
if (exceptionClass.getName().startsWith(packagePrefix)) {
return true;
}
}
return matches(exceptionClass.getSuperclass(), exceptionClassName);
}
/**
* The exception mapping.
*/
@ToString
@EqualsAndHashCode
@NoArgsConstructor
@AllArgsConstructor
public static class ExceptionMapping {
/**
* Instantiates a new exception mapping.
*
* @param exceptionClassName the exception class name
* @param httpStatus the http status
* @param code the code
*/
@SuppressWarnings("WeakerAccess")
public ExceptionMapping(String exceptionClassName, HttpStatus httpStatus, String code) {
this.exceptionClassName = exceptionClassName;
if (httpStatus != null) {
this.status = httpStatus.value();
this.message = httpStatus.getReasonPhrase();
}
this.code = code;
}
@Getter
@Setter
private String exceptionClassName;
@Setter
private int status;
@Getter
@Setter
private String message;
@Getter
@Setter
private String code;
/**
* Gets status.
*
* @return the status
*/
public int getStatus() {
if (HttpStatus.resolve(status) == null) {
return HttpStatus.INTERNAL_SERVER_ERROR.value();
}
return status;
}
}
/**
* The exception mapping config.
*/
@SuppressWarnings("WeakerAccess")
@ToString
@EqualsAndHashCode
@NoArgsConstructor
@AllArgsConstructor
public static class ExceptionMappingConfig {
@Getter
@Setter
private String exceptionClassName;
@Getter
@Setter
private boolean includeExceptionClassName = true;
@Getter
@Setter
private boolean includeApplicationName = true;
@Getter
@Setter
private boolean includePath = true;
@Getter
@Setter
private boolean includeHandler = false;
@Getter
@Setter
private boolean includeStackTrace = false;
@Getter
@Setter
private boolean includeCause = true;
@Getter
@Setter
private boolean evaluateAnnotationFirst = false;
}
}