| /* |
| * 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.BufferPoolMXBean; |
| import java.lang.management.ManagementFactory; |
| import java.lang.management.MemoryUsage; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.drill.common.config.DrillConfig; |
| 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 MemoryIterator implements Iterator<Object> { |
| |
| private boolean beforeFirst = true; |
| private final ExecutorFragmentContext context; |
| |
| public MemoryIterator(final ExecutorFragmentContext context) { |
| this.context = context; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return beforeFirst; |
| } |
| |
| @Override |
| public Object next() { |
| if (!beforeFirst) { |
| throw new IllegalStateException(); |
| } |
| beforeFirst = false; |
| final MemoryInfo memoryInfo = new MemoryInfo(); |
| |
| final DrillbitEndpoint endpoint = context.getEndpoint(); |
| memoryInfo.hostname = endpoint.getAddress(); |
| memoryInfo.user_port = endpoint.getUserPort(); |
| |
| final MemoryUsage heapMemoryUsage = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage(); |
| memoryInfo.heap_current = heapMemoryUsage.getUsed(); |
| memoryInfo.heap_max = heapMemoryUsage.getMax(); |
| |
| BufferPoolMXBean directBean = getDirectBean(); |
| memoryInfo.jvm_direct_current = directBean.getMemoryUsed(); |
| |
| // We need the memory used by the root allocator for the Drillbit |
| memoryInfo.direct_current = context.getRootAllocator().getAllocatedMemory(); |
| memoryInfo.direct_max = DrillConfig.getMaxDirectMemory(); |
| return memoryInfo; |
| } |
| |
| private BufferPoolMXBean getDirectBean() { |
| List<BufferPoolMXBean> pools = ManagementFactory.getPlatformMXBeans(BufferPoolMXBean.class); |
| for (BufferPoolMXBean b : pools) { |
| if (b.getName().equals("direct")) { |
| return b; |
| } |
| } |
| throw new IllegalStateException("Unable to find direct buffer bean. JVM must be too old."); |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public static class MemoryInfo { |
| @NonNullable |
| public String hostname; |
| public long user_port; |
| public long heap_current; |
| public long heap_max; |
| public long direct_current; |
| public long jvm_direct_current; |
| public long direct_max; |
| } |
| } |