| /* |
| * |
| * 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.concurrent; |
| |
| import java.util.concurrent.ExecutorService; |
| |
| public interface LocalAwareExecutorService extends ExecutorService, ResizableThreadPool |
| { |
| // we need a way to inject a TraceState directly into the Executor context without going through |
| // the global Tracing sessions; see CASSANDRA-5668 |
| void execute(Runnable command, ExecutorLocals locals); |
| |
| // permits executing in the context of the submitting thread |
| void maybeExecuteImmediately(Runnable command); |
| |
| /** |
| * Returns the approximate number of threads that are actively |
| * executing tasks. |
| * |
| * @return the number of threads |
| */ |
| int getActiveTaskCount(); |
| |
| /** |
| * Returns the approximate total number of tasks that have |
| * completed execution. Because the states of tasks and threads |
| * may change dynamically during computation, the returned value |
| * is only an approximation, but one that does not ever decrease |
| * across successive calls. |
| * |
| * @return the number of tasks |
| */ |
| long getCompletedTaskCount(); |
| |
| /** |
| * Returns the approximate total of tasks waiting to be executed. |
| * Because the states of tasks and threads |
| * may change dynamically during computation, the returned value |
| * is only an approximation, but one that does not ever decrease |
| * across successive calls. |
| * |
| * @return the number of tasks |
| */ |
| int getPendingTaskCount(); |
| |
| default int getMaxTasksQueued() |
| { |
| return -1; |
| } |
| |
| interface MaximumPoolSizeListener |
| { |
| /** |
| * Listener to follow changes to the maximum pool size |
| */ |
| void onUpdateMaximumPoolSize(int maximumPoolSize); |
| } |
| } |