| /* |
| * 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.cassandra.db.guardrails; |
| |
| import java.util.function.ToLongFunction; |
| import javax.annotation.Nullable; |
| |
| import org.apache.cassandra.service.ClientState; |
| |
| /** |
| * {@link MaxThreshold} for maximum guardrails, the value is checked to see if it is greater than the warn and fail thresholds. |
| */ |
| public class MaxThreshold extends Threshold |
| { |
| /** |
| * Creates a new threshold guardrail. |
| * |
| * @param name the identifying name of the guardrail |
| * @param reason the optional description of the reason for guarding the operation |
| * @param warnThreshold a {@link ClientState}-based provider of the value above which a warning should be triggered. |
| * @param failThreshold a {@link ClientState}-based provider of the value above which the operation should be aborted. |
| * @param messageProvider a function to generate the warning or error message if the guardrail is triggered |
| */ |
| public MaxThreshold(String name, |
| @Nullable String reason, |
| ToLongFunction<ClientState> warnThreshold, |
| ToLongFunction<ClientState> failThreshold, |
| Threshold.ErrorMessageProvider messageProvider) |
| { |
| super(name, reason, warnThreshold, failThreshold, messageProvider); |
| } |
| |
| @Override |
| protected boolean compare(long value, long threshold) |
| { |
| return value > threshold; |
| } |
| |
| @Override |
| protected long failValue(ClientState state) |
| { |
| long failValue = failThreshold.applyAsLong(state); |
| return failValue <= 0 ? Long.MAX_VALUE : failValue; |
| } |
| |
| @Override |
| protected long warnValue(ClientState state) |
| { |
| long warnValue = warnThreshold.applyAsLong(state); |
| return warnValue <= 0 ? Long.MAX_VALUE : warnValue; |
| } |
| |
| } |