| /* |
| * 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 java.util.ArrayList; |
| import java.util.List; |
| |
| import io.airlift.airline.Arguments; |
| import io.airlift.airline.Command; |
| import org.apache.cassandra.tools.NodeProbe; |
| import org.apache.cassandra.tools.NodeTool.NodeToolCmd; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| @Command(name = "setconcurrency", description = "Set maximum concurrency for processing stage") |
| public class SetConcurrency extends NodeToolCmd |
| { |
| @Arguments(title = "<pool-name> <maximum-concurrency> | <stage-name> <core-pool> <maximum-concurrency>", |
| usage = "<stage-name> <maximum-concurrency> | <stage-name> <core-pool> <maximum-concurrency>", |
| description = "Set concurrency for processing stage", |
| required = true) |
| private List<String> args = new ArrayList<>(); |
| |
| @Override |
| public void execute(NodeProbe probe) |
| { |
| checkArgument(args.size() >= 2 && args.size() <= 3, "setconcurrency requires stage name, optional core pool size and maximum concurrency"); |
| |
| int corePoolSize = args.size() == 2 ? -1 : Integer.valueOf(args.get(1)); |
| int maximumPoolSize = args.size() == 2 ? Integer.valueOf(args.get(1)) : Integer.valueOf(args.get(2)); |
| |
| checkArgument(args.size() == 2 || corePoolSize >= 0, "Core pool size must be non-negative"); |
| checkArgument(maximumPoolSize >= 0, "Maximum pool size must be non-negative"); |
| |
| try |
| { |
| probe.setConcurrency(args.get(0), corePoolSize, maximumPoolSize); |
| } |
| catch (IllegalArgumentException e) |
| { |
| String message = e.getMessage() != null ? e.getMessage() : "invalid pool size"; |
| probe.output().out.println("Unable to set concurrency: " + message); |
| System.exit(1); |
| } |
| } |
| } |