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/*
* Copyright 2024 The Dapr 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 io.dapr.exceptions;
import com.google.protobuf.Any;
import com.google.protobuf.InvalidProtocolBufferException;
import com.google.protobuf.Message;
import com.google.rpc.Status;
import io.dapr.utils.TypeRef;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;
public class DaprErrorDetails {
static final DaprErrorDetails EMPTY_INSTANCE = new DaprErrorDetails((Status) null);
private static final Map, ErrorDetailType> SUPPORTED_ERROR_TYPES =
Collections.unmodifiableMap(new HashMap<>() {
{
put(com.google.rpc.ErrorInfo.class, ErrorDetailType.ERROR_INFO);
put(com.google.rpc.RetryInfo.class, ErrorDetailType.RETRY_INFO);
put(com.google.rpc.DebugInfo.class, ErrorDetailType.DEBUG_INFO);
put(com.google.rpc.QuotaFailure.class, ErrorDetailType.QUOTA_FAILURE);
put(com.google.rpc.PreconditionFailure.class, ErrorDetailType.PRECONDITION_FAILURE);
put(com.google.rpc.BadRequest.class, ErrorDetailType.BAD_REQUEST);
put(com.google.rpc.RequestInfo.class, ErrorDetailType.REQUEST_INFO);
put(com.google.rpc.ResourceInfo.class, ErrorDetailType.RESOURCE_INFO);
put(com.google.rpc.Help.class, ErrorDetailType.HELP);
put(com.google.rpc.LocalizedMessage.class, ErrorDetailType.LOCALIZED_MESSAGE);
}
});
private static final Map> ERROR_TYPES_FQN_REVERSE_LOOKUP =
SUPPORTED_ERROR_TYPES.keySet().stream().collect(Collectors.toMap(
item -> generateErrorTypeFqn(item),
item -> item
));
/**
* Error status details.
*/
private final Map> map;
public DaprErrorDetails(Status grpcStatus) {
this.map = parse(grpcStatus);
}
public DaprErrorDetails(List> entries) {
this.map = parse(entries);
}
/**
* Gets an attribute of an error detail.
* @param errorDetailType Type of the error detail.
* @param errAttribute Attribute of the error detail.
* @param typeRef Type of the value expected to be returned.
* @param Type of the value to be returned.
* @return Value of the attribute or null if not found.
*/
public T get(ErrorDetailType errorDetailType, String errAttribute, TypeRef typeRef) {
Map dictionary = map.get(errorDetailType);
if (dictionary == null) {
return null;
}
return (T) dictionary.get(errAttribute);
}
/**
* Parses status details from a gRPC Status.
*
* @param status The gRPC Status to parse details from.
* @return List containing parsed status details.
*/
private static Map> parse(Status status) {
if (status == null || status.getDetailsList() == null) {
return Collections.emptyMap();
}
Map> detailsList = new HashMap<>();
List grpcDetailsList = status.getDetailsList();
for (Any detail : grpcDetailsList) {
for (Map.Entry, ErrorDetailType>
supportedClazzAndType : SUPPORTED_ERROR_TYPES.entrySet()) {
Class clazz = supportedClazzAndType.getKey();
ErrorDetailType errorDetailType = supportedClazzAndType.getValue();
if (detail.is(clazz)) {
detailsList.put(errorDetailType, parseProtoMessage(detail, clazz));
}
}
}
return Collections.unmodifiableMap(detailsList);
}
private static Map> parse(List> entries) {
if ((entries == null) || entries.isEmpty()) {
return Collections.emptyMap();
}
Map> detailsList = new HashMap<>();
for (Map entry : entries) {
Object type = entry.getOrDefault("@type", "");
if (type == null) {
continue;
}
Class clazz = ERROR_TYPES_FQN_REVERSE_LOOKUP.get(type.toString());
if (clazz == null) {
continue;
}
ErrorDetailType errorDetailType = SUPPORTED_ERROR_TYPES.get(clazz);
if (errorDetailType == null) {
continue;
}
detailsList.put(errorDetailType, entry);
}
return Collections.unmodifiableMap(detailsList);
}
private static Map parseProtoMessage(
Any detail, Class clazz) {
try {
T message = detail.unpack(clazz);
return messageToMap(message);
} catch (InvalidProtocolBufferException e) {
return Collections.singletonMap(e.getClass().getSimpleName(), e.getMessage());
}
}
/**
* Converts a Protocol Buffer (proto) message to a Map.
*
* @param message The proto message to be converted.
* @return A Map representing the fields of the proto message.
*/
private static Map messageToMap(Message message) {
Map result = new HashMap<>();
Field[] fields = message.getClass().getDeclaredFields();
result.put("@type", generateErrorTypeFqn(message.getClass()));
for (Field field : fields) {
if (field.isSynthetic() || Modifier.isStatic(field.getModifiers())) {
continue;
}
String normalizedFieldName = field.getName().replaceAll("_$", "");
try {
field.setAccessible(true);
Object value = field.get(message);
result.put(normalizedFieldName, value);
} catch (IllegalAccessException e) {
// no-op, just ignore this attribute.
}
}
return Collections.unmodifiableMap(result);
}
private static String generateErrorTypeFqn(Class clazz) {
String className = clazz.getName();
// trim the 'com.' to match the kit error details returned to users
return "type.googleapis.com/" + (className.startsWith("com.") ? className.substring(4) : className);
}
/**
* {@inheritDoc}
*/
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
DaprErrorDetails that = (DaprErrorDetails) o;
return Objects.equals(map, that.map);
}
/**
* {@inheritDoc}
*/
@Override
public int hashCode() {
return Objects.hash(map);
}
public enum ErrorDetailType {
ERROR_INFO,
RETRY_INFO,
DEBUG_INFO,
QUOTA_FAILURE,
PRECONDITION_FAILURE,
BAD_REQUEST,
REQUEST_INFO,
RESOURCE_INFO,
HELP,
LOCALIZED_MESSAGE,
}
}
