| /* |
| * 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 org.apache.cassandra.service.ClientState; |
| |
| /** |
| * A {@link Threshold} guardrail whose values represent a percentage |
| * <p> |
| * This works exactly as a {@link Threshold}, but provides slightly more convenient error messages for percentage |
| */ |
| public class PercentageThreshold extends MaxThreshold |
| { |
| /** |
| * Creates a new threshold guardrail. |
| * |
| * @param name the identifying name of the guardrail |
| * @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 PercentageThreshold(String name, |
| ToLongFunction<ClientState> warnThreshold, |
| ToLongFunction<ClientState> failThreshold, |
| ErrorMessageProvider messageProvider) |
| { |
| super(name, warnThreshold, failThreshold, messageProvider); |
| } |
| |
| @Override |
| protected String errMsg(boolean isWarning, String what, long value, long thresholdValue) |
| { |
| return messageProvider.createMessage(isWarning, |
| what, |
| String.format("%d%%", value), |
| String.format("%d%%", thresholdValue)); |
| } |
| } |