io.netty.resolver.dns.DnsErrorCauseException Maven / Gradle / Ivy
/*
* Copyright 2023 The Netty Project
*
* The Netty Project 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:
*
* https://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.netty.resolver.dns;
import io.netty.handler.codec.dns.DnsResponseCode;
import io.netty.util.internal.ThrowableUtil;
import java.net.UnknownHostException;
/**
* A metadata carrier exception, to propagate {@link DnsResponseCode} information as an enrichment
* within the {@link UnknownHostException} cause.
*/
public final class DnsErrorCauseException extends RuntimeException {
private static final long serialVersionUID = 7485145036717494533L;
private final DnsResponseCode code;
private DnsErrorCauseException(String message, DnsResponseCode code, boolean shared) {
super(message, null, false, true);
this.code = code;
assert shared;
}
// Override fillInStackTrace() so we not populate the backtrace via a native call and so leak the
// Classloader.
@Override
public Throwable fillInStackTrace() {
return this;
}
/**
* Returns the DNS error-code that caused the {@link UnknownHostException}.
*
* @return the DNS error-code that caused the {@link UnknownHostException}.
*/
public DnsResponseCode getCode() {
return code;
}
static DnsErrorCauseException newStatic(String message, DnsResponseCode code, Class clazz, String method) {
final DnsErrorCauseException exception = new DnsErrorCauseException(message, code, true);
return ThrowableUtil.unknownStackTrace(exception, clazz, method);
}
}