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/*
* 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.dubbo.remoting.etcd.option;
import io.etcd.jetcd.ByteSequence;
import io.grpc.Status;
import io.netty.handler.codec.http2.Http2Exception;
public class OptionUtil {
public static final byte[] NO_PREFIX_END = {0};
public static final ByteSequence prefixEndOf(ByteSequence prefix) {
byte[] endKey = prefix.getBytes().clone();
if (prefix.size() > 0) {
endKey[endKey.length - 1] = (byte) (endKey[endKey.length - 1] + 1);
return ByteSequence.from(endKey);
}
return ByteSequence.from(NO_PREFIX_END);
}
public static boolean isRecoverable(Status status) {
return isHaltError(status)
|| isNoLeaderError(status)
// ephemeral is expired
|| status.getCode() == Status.Code.NOT_FOUND;
}
public static boolean isHaltError(Status status) {
// Unavailable codes mean the system will be right back.
// (e.g., can't connect, lost leader)
// Treat Internal codes as if something failed, leaving the
// system in an inconsistent state, but retrying could make progress.
// (e.g., failed in middle of send, corrupted frame)
return status.getCode() != Status.Code.UNAVAILABLE && status.getCode() != Status.Code.INTERNAL;
}
public static boolean isNoLeaderError(Status status) {
return status.getCode() == Status.Code.UNAVAILABLE
&& "etcdserver: no leader".equals(status.getDescription());
}
public static boolean isProtocolError(Throwable e) {
if (e == null) {
return false;
}
Throwable cause = e.getCause();
while (cause != null) {
if (cause instanceof Http2Exception) {
Http2Exception t = (Http2Exception) cause;
if ("PROTOCOL_ERROR".equals(t.error().name())) {
return true;
}
}
cause = cause.getCause();
}
return false;
}
}