| /* |
| * 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.metrics; |
| |
| import com.codahale.metrics.Counter; |
| import com.codahale.metrics.Gauge; |
| |
| import org.apache.cassandra.concurrent.SEPExecutor; |
| |
| import static org.apache.cassandra.metrics.CassandraMetricsRegistry.Metrics; |
| |
| public class SEPMetrics |
| { |
| /** Number of active tasks. */ |
| public final Gauge<Integer> activeTasks; |
| /** Number of tasks that had blocked before being accepted (or rejected). */ |
| public final Counter totalBlocked; |
| /** |
| * Number of tasks currently blocked, waiting to be accepted by |
| * the executor (because all threads are busy and the backing queue is full). |
| */ |
| public final Counter currentBlocked; |
| /** Number of completed tasks. */ |
| public final Gauge<Long> completedTasks; |
| /** Number of tasks waiting to be executed. */ |
| public final Gauge<Long> pendingTasks; |
| /** Maximum number of threads before it will start queuing tasks */ |
| public final Gauge<Integer> maxPoolSize; |
| |
| private MetricNameFactory factory; |
| |
| /** |
| * Create metrics for the given LowSignalExecutor. |
| * |
| * @param executor Thread pool |
| * @param path Type of thread pool |
| * @param poolName Name of thread pool to identify metrics |
| */ |
| public SEPMetrics(final SEPExecutor executor, String path, String poolName) |
| { |
| this.factory = new ThreadPoolMetricNameFactory("ThreadPools", path, poolName); |
| activeTasks = Metrics.register(factory.createMetricName("ActiveTasks"), new Gauge<Integer>() |
| { |
| public Integer getValue() |
| { |
| return executor.getActiveCount(); |
| } |
| }); |
| pendingTasks = Metrics.register(factory.createMetricName("PendingTasks"), new Gauge<Long>() |
| { |
| public Long getValue() |
| { |
| return executor.getPendingTasks(); |
| } |
| }); |
| totalBlocked = Metrics.counter(factory.createMetricName("TotalBlockedTasks")); |
| currentBlocked = Metrics.counter(factory.createMetricName("CurrentlyBlockedTasks")); |
| |
| completedTasks = Metrics.register(factory.createMetricName("CompletedTasks"), new Gauge<Long>() |
| { |
| public Long getValue() |
| { |
| return executor.getCompletedTasks(); |
| } |
| }); |
| maxPoolSize = Metrics.register(factory.createMetricName("MaxPoolSize"), new Gauge<Integer>() |
| { |
| public Integer getValue() |
| { |
| return executor.maxWorkers; |
| } |
| }); |
| } |
| |
| public void release() |
| { |
| Metrics.remove(factory.createMetricName("ActiveTasks")); |
| Metrics.remove(factory.createMetricName("PendingTasks")); |
| Metrics.remove(factory.createMetricName("CompletedTasks")); |
| Metrics.remove(factory.createMetricName("TotalBlockedTasks")); |
| Metrics.remove(factory.createMetricName("CurrentlyBlockedTasks")); |
| Metrics.remove(factory.createMetricName("MaxPoolSize")); |
| } |
| } |