com.google.gerrit.server.ExceptionHook Maven / Gradle / Ivy
// Copyright (C) 2019 The Android Open Source Project
//
// 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 com.google.gerrit.server;
import com.google.gerrit.extensions.annotations.ExtensionPoint;
/**
* Allows implementors to control how certain exceptions should be handled.
*
* This interface is intended to be implemented for cluster setups with multiple primary nodes to
* control the behavior for handling exceptions that are thrown by a lower layer that handles the
* consensus and synchronization between different server nodes. E.g. if an operation fails because
* consensus for a Git update could not be achieved (e.g. due to slow responding server nodes) this
* interface can be used to retry the request instead of failing it immediately.
*/
@ExtensionPoint
public interface ExceptionHook {
/**
* Whether an operation should be retried if it failed with the given throwable.
*
*
Only affects operations that are executed with {@link
* com.google.gerrit.server.update.RetryHelper}.
*
* @param throwable throwable that was thrown while executing the operation
* @return whether the operation should be retried
*/
default boolean shouldRetry(Throwable throwable) {
return false;
}
}