/* * 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.tools.nodetool; import static com.google.common.base.Preconditions.checkArgument; import io.airlift.command.Arguments; import io.airlift.command.Command; import org.apache.cassandra.tools.NodeProbe; import org.apache.cassandra.tools.NodeTool.NodeToolCmd; @Command(name = "settraceprobability", description = "Sets the probability for tracing any given request to value. 0 disables, 1 enables for all requests, 0 is the default") public class SetTraceProbability extends NodeToolCmd { @Arguments(title = "trace_probability", usage = "<value>", description = "Trace probability between 0 and 1 (ex: 0.2)", required = true) private Double traceProbability = null; @Override public void execute(NodeProbe probe) { checkArgument(traceProbability >= 0 && traceProbability <= 1, "Trace probability must be between 0 and 1"); probe.setTraceProbability(traceProbability); } }