kafka ApiError 源码
kafka ApiError 代码
文件路径:/clients/src/main/java/org/apache/kafka/common/requests/ApiError.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.kafka.common.requests;
import org.apache.kafka.common.errors.ApiException;
import org.apache.kafka.common.protocol.Errors;
import java.util.Objects;
/**
* Encapsulates an error code (via the Errors enum) and an optional message. Generally, the optional message is only
* defined if it adds information over the default message associated with the error code.
*
* This is an internal class (like every class in the requests package).
*/
public class ApiError {
public static final ApiError NONE = new ApiError(Errors.NONE, null);
private final Errors error;
private final String message;
public static ApiError fromThrowable(Throwable t) {
// Avoid populating the error message if it's a generic one. Also don't populate error
// message for UNKNOWN_SERVER_ERROR to ensure we don't leak sensitive information.
Throwable throwableToBeEncoded = Errors.maybeUnwrapException(t);
Errors error = Errors.forException(throwableToBeEncoded);
String message = error == Errors.UNKNOWN_SERVER_ERROR ||
error.message().equals(throwableToBeEncoded.getMessage()) ? null : throwableToBeEncoded.getMessage();
return new ApiError(error, message);
}
public ApiError(Errors error) {
this(error, error.message());
}
public ApiError(Errors error, String message) {
this.error = error;
this.message = message;
}
public ApiError(short code, String message) {
this.error = Errors.forCode(code);
this.message = message;
}
public boolean is(Errors error) {
return this.error == error;
}
public boolean isFailure() {
return !isSuccess();
}
public boolean isSuccess() {
return is(Errors.NONE);
}
public Errors error() {
return error;
}
/**
* Return the optional error message or null. Consider using {@link #messageWithFallback()} instead.
*/
public String message() {
return message;
}
/**
* If `message` is defined, return it. Otherwise fallback to the default error message associated with the error
* code.
*/
public String messageWithFallback() {
if (message == null)
return error.message();
return message;
}
public ApiException exception() {
return error.exception(message);
}
@Override
public int hashCode() {
return Objects.hash(error, message);
}
@Override
public boolean equals(Object o) {
if (!(o instanceof ApiError)) {
return false;
}
ApiError other = (ApiError) o;
return Objects.equals(error, other.error) &&
Objects.equals(message, other.message);
}
@Override
public String toString() {
return "ApiError(error=" + error + ", message=" + message + ")";
}
}
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