| /* |
| * 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.drill.exec.store.sys; |
| |
| import java.lang.management.ManagementFactory; |
| import java.lang.management.ThreadMXBean; |
| import java.util.Iterator; |
| |
| import org.apache.drill.exec.ops.ExecutorFragmentContext; |
| import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint; |
| import org.apache.drill.exec.store.pojo.NonNullable; |
| |
| public class ThreadsIterator implements Iterator<Object> { |
| |
| private boolean beforeFirst = true; |
| private final ExecutorFragmentContext context; |
| |
| public ThreadsIterator(final ExecutorFragmentContext context) { |
| this.context = context; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return beforeFirst; |
| } |
| |
| @Override |
| public Object next() { |
| if (!beforeFirst) { |
| throw new IllegalStateException(); |
| } |
| beforeFirst = false; |
| final ThreadsInfo threadsInfo = new ThreadsInfo(); |
| |
| final DrillbitEndpoint endpoint = context.getEndpoint(); |
| threadsInfo.hostname = endpoint.getAddress(); |
| threadsInfo.user_port = endpoint.getUserPort(); |
| |
| final ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean(); |
| threadsInfo.total_threads = threadMXBean.getPeakThreadCount(); |
| threadsInfo.busy_threads = threadMXBean.getThreadCount(); |
| return threadsInfo; |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public static class ThreadsInfo { |
| @NonNullable |
| public String hostname; |
| public long user_port; |
| public long total_threads; |
| public long busy_threads; |
| } |
| } |