| /** |
| * 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.storm.container.cgroup; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import org.apache.storm.container.cgroup.core.CgroupCore; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class CgroupCommon implements CgroupCommonOperation { |
| |
| public static final String TASKS = "/tasks"; |
| public static final String NOTIFY_ON_RELEASE = "/notify_on_release"; |
| public static final String RELEASE_AGENT = "/release_agent"; |
| public static final String CGROUP_CLONE_CHILDREN = "/cgroup.clone_children"; |
| public static final String CGROUP_EVENT_CONTROL = "/cgroup.event_control"; |
| public static final String CGROUP_PROCS = "/cgroup.procs"; |
| private static final Logger LOG = LoggerFactory.getLogger(CgroupCommon.class); |
| private final Hierarchy hierarchy; |
| private final String name; |
| private final String dir; |
| private final CgroupCommon parent; |
| private final boolean isRoot; |
| |
| public CgroupCommon(String name, Hierarchy hierarchy, CgroupCommon parent) { |
| this.name = parent.getName() + "/" + name; |
| this.hierarchy = hierarchy; |
| this.parent = parent; |
| this.dir = parent.getDir() + "/" + name; |
| this.isRoot = false; |
| } |
| |
| public CgroupCommon(Hierarchy hierarchy, String dir) { |
| this.name = ""; |
| this.hierarchy = hierarchy; |
| this.parent = null; |
| this.dir = dir; |
| this.isRoot = true; |
| } |
| |
| @Override |
| public void addTask(int taskId) throws IOException { |
| CgroupUtils.writeFileByLine(CgroupUtils.getDir(this.dir, TASKS), String.valueOf(taskId)); |
| } |
| |
| @Override |
| public Set<Integer> getTasks() throws IOException { |
| List<String> stringTasks = CgroupUtils.readFileByLine(CgroupUtils.getDir(this.dir, TASKS)); |
| Set<Integer> tasks = new HashSet<Integer>(); |
| for (String task : stringTasks) { |
| tasks.add(Integer.valueOf(task)); |
| } |
| return tasks; |
| } |
| |
| @Override |
| public void addProcs(int pid) throws IOException { |
| CgroupUtils.writeFileByLine(CgroupUtils.getDir(this.dir, CGROUP_PROCS), String.valueOf(pid)); |
| } |
| |
| @Override |
| public Set<Long> getPids() throws IOException { |
| List<String> stringPids = CgroupUtils.readFileByLine(CgroupUtils.getDir(this.dir, CGROUP_PROCS)); |
| Set<Long> pids = new HashSet<>(); |
| for (String task : stringPids) { |
| pids.add(Long.valueOf(task)); |
| } |
| return pids; |
| } |
| |
| @Override |
| public boolean getNotifyOnRelease() throws IOException { |
| return CgroupUtils.readFileByLine(CgroupUtils.getDir(this.dir, NOTIFY_ON_RELEASE)).get(0).equals("1") ? true : false; |
| } |
| |
| @Override |
| public void setNotifyOnRelease(boolean flag) throws IOException { |
| |
| CgroupUtils.writeFileByLine(CgroupUtils.getDir(this.dir, NOTIFY_ON_RELEASE), flag ? "1" : "0"); |
| } |
| |
| @Override |
| public String getReleaseAgent() throws IOException { |
| if (!this.isRoot) { |
| LOG.warn("Cannot get {} in {} since its not the root group", RELEASE_AGENT, this.isRoot); |
| return null; |
| } |
| return CgroupUtils.readFileByLine(CgroupUtils.getDir(this.dir, RELEASE_AGENT)).get(0); |
| } |
| |
| @Override |
| public void setReleaseAgent(String command) throws IOException { |
| if (!this.isRoot) { |
| LOG.warn("Cannot set {} in {} since its not the root group", RELEASE_AGENT, this.isRoot); |
| return; |
| } |
| CgroupUtils.writeFileByLine(CgroupUtils.getDir(this.dir, RELEASE_AGENT), command); |
| } |
| |
| @Override |
| public boolean getCgroupCloneChildren() throws IOException { |
| return CgroupUtils.readFileByLine(CgroupUtils.getDir(this.dir, CGROUP_CLONE_CHILDREN)).get(0).equals("1") ? true : false; |
| } |
| |
| @Override |
| public void setCgroupCloneChildren(boolean flag) throws IOException { |
| if (!getCores().keySet().contains(SubSystemType.cpuset)) { |
| return; |
| } |
| CgroupUtils.writeFileByLine(CgroupUtils.getDir(this.dir, CGROUP_CLONE_CHILDREN), flag ? "1" : "0"); |
| } |
| |
| @Override |
| public void setEventControl(String eventFd, String controlFd, String... args) throws IOException { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(eventFd); |
| sb.append(' '); |
| sb.append(controlFd); |
| for (String arg : args) { |
| sb.append(' '); |
| sb.append(arg); |
| } |
| CgroupUtils.writeFileByLine(CgroupUtils.getDir(this.dir, CGROUP_EVENT_CONTROL), sb.toString()); |
| } |
| |
| public Hierarchy getHierarchy() { |
| return hierarchy; |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public String getDir() { |
| return dir; |
| } |
| |
| public CgroupCommon getParent() { |
| return parent; |
| } |
| |
| public Set<CgroupCommon> getChildren() { |
| |
| File file = new File(this.dir); |
| File[] files = file.listFiles(); |
| if (files == null) { |
| LOG.info("{} is not a directory", this.dir); |
| return null; |
| } |
| Set<CgroupCommon> children = new HashSet<CgroupCommon>(); |
| for (File child : files) { |
| if (child.isDirectory()) { |
| children.add(new CgroupCommon(child.getName(), this.hierarchy, this)); |
| } |
| } |
| return children; |
| } |
| |
| public boolean isRoot() { |
| return isRoot; |
| } |
| |
| public Map<SubSystemType, CgroupCore> getCores() { |
| return CgroupCoreFactory.getInstance(this.hierarchy.getSubSystems(), this.dir); |
| } |
| |
| public void delete() throws IOException { |
| this.free(); |
| if (!this.isRoot) { |
| this.parent.getChildren().remove(this); |
| } |
| } |
| |
| private void free() throws IOException { |
| for (CgroupCommon child : getChildren()) { |
| child.free(); |
| } |
| if (this.isRoot) { |
| return; |
| } |
| Set<Integer> tasks = this.getTasks(); |
| if (tasks != null) { |
| for (Integer task : tasks) { |
| this.parent.addTask(task); |
| } |
| } |
| CgroupUtils.deleteDir(this.dir); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| boolean ret = false; |
| if (o != null && (o instanceof CgroupCommon)) { |
| |
| boolean hierarchyFlag = false; |
| if (((CgroupCommon) o).hierarchy != null && this.hierarchy != null) { |
| hierarchyFlag = ((CgroupCommon) o).hierarchy.equals(this.hierarchy); |
| } else if (((CgroupCommon) o).hierarchy == null && this.hierarchy == null) { |
| hierarchyFlag = true; |
| } else { |
| hierarchyFlag = false; |
| } |
| |
| boolean nameFlag = false; |
| if (((CgroupCommon) o).name != null && this.name != null) { |
| nameFlag = ((CgroupCommon) o).name.equals(this.name); |
| } else if (((CgroupCommon) o).name == null && this.name == null) { |
| nameFlag = true; |
| } else { |
| nameFlag = false; |
| } |
| |
| boolean dirFlag = false; |
| if (((CgroupCommon) o).dir != null && this.dir != null) { |
| dirFlag = ((CgroupCommon) o).dir.equals(this.dir); |
| } else if (((CgroupCommon) o).dir == null && this.dir == null) { |
| dirFlag = true; |
| } else { |
| dirFlag = false; |
| } |
| ret = hierarchyFlag && nameFlag && dirFlag; |
| } |
| return ret; |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + (this.name != null ? this.name.hashCode() : 0); |
| result = prime * result + (this.hierarchy != null ? this.hierarchy.hashCode() : 0); |
| result = prime * result + (this.dir != null ? this.dir.hashCode() : 0); |
| return result; |
| } |
| |
| @Override |
| public String toString() { |
| return this.getName(); |
| } |
| } |