| /* |
| * 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.zookeeper.cli; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import org.apache.commons.cli.CommandLine; |
| import org.apache.commons.cli.DefaultParser; |
| import org.apache.commons.cli.Option; |
| import org.apache.commons.cli.OptionGroup; |
| import org.apache.commons.cli.Options; |
| import org.apache.commons.cli.ParseException; |
| import org.apache.zookeeper.CreateMode; |
| import org.apache.zookeeper.KeeperException; |
| import org.apache.zookeeper.Quotas; |
| import org.apache.zookeeper.StatsTrack; |
| import org.apache.zookeeper.ZKUtil; |
| import org.apache.zookeeper.ZooDefs; |
| import org.apache.zookeeper.ZooKeeper; |
| import org.apache.zookeeper.data.Stat; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * setQuota command for cli |
| */ |
| public class SetQuotaCommand extends CliCommand { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(SetQuotaCommand.class); |
| private Options options = new Options(); |
| private String[] args; |
| private CommandLine cl; |
| |
| public SetQuotaCommand() { |
| super("setquota", "-n|-b val path"); |
| |
| OptionGroup og1 = new OptionGroup(); |
| og1.addOption(new Option("b", true, "bytes quota")); |
| og1.addOption(new Option("n", true, "num quota")); |
| og1.setRequired(true); |
| options.addOptionGroup(og1); |
| } |
| |
| @Override |
| public CliCommand parse(String[] cmdArgs) throws CliParseException { |
| DefaultParser parser = new DefaultParser(); |
| try { |
| cl = parser.parse(options, cmdArgs); |
| } catch (ParseException ex) { |
| throw new CliParseException(ex); |
| } |
| args = cl.getArgs(); |
| if (args.length < 2) { |
| throw new CliParseException(getUsageStr()); |
| } |
| |
| return this; |
| } |
| |
| @Override |
| public boolean exec() throws CliException { |
| // get the args |
| String path = args[1]; |
| if (path.startsWith(Quotas.quotaZookeeper)) { |
| err.println("cannot set a quota under the path: " + Quotas.quotaZookeeper); |
| return false; |
| } |
| |
| if (cl.hasOption("b")) { |
| // we are setting the bytes quota |
| long bytes = Long.parseLong(cl.getOptionValue("b")); |
| try { |
| createQuota(zk, path, bytes, -1); |
| } catch (KeeperException | InterruptedException | IllegalArgumentException ex) { |
| throw new CliWrapperException(ex); |
| } |
| } else if (cl.hasOption("n")) { |
| // we are setting the num quota |
| int numNodes = Integer.parseInt(cl.getOptionValue("n")); |
| try { |
| createQuota(zk, path, -1L, numNodes); |
| } catch (KeeperException | InterruptedException | IllegalArgumentException ex) { |
| throw new CliWrapperException(ex); |
| } |
| } else { |
| throw new MalformedCommandException(getUsageStr()); |
| } |
| |
| return false; |
| } |
| |
| public static boolean createQuota( |
| ZooKeeper zk, |
| String path, |
| long bytes, |
| int numNodes) throws KeeperException, InterruptedException, IllegalArgumentException, MalformedPathException { |
| // check if the path exists. We cannot create |
| // quota for a path that already exists in zookeeper |
| // for now. |
| Stat initStat; |
| try { |
| initStat = zk.exists(path, false); |
| } catch (IllegalArgumentException ex) { |
| throw new MalformedPathException(ex.getMessage()); |
| } |
| if (initStat == null) { |
| throw new IllegalArgumentException(path + " does not exist."); |
| } |
| // now check if their is already existing |
| // parent or child that has quota |
| |
| String quotaPath = Quotas.quotaZookeeper; |
| // check for more than 2 children -- |
| // if zookeeper_stats and zookeeper_quotas |
| // are not the children then this path |
| // is an ancestor of some path that |
| // already has quota |
| |
| //check if the child node has a quota. |
| checkIfChildQuota(zk, path); |
| |
| //check for any parent that has been quota |
| checkIfParentQuota(zk, path); |
| |
| // this is valid node for quota |
| // start creating all the parents |
| if (zk.exists(quotaPath, false) == null) { |
| try { |
| zk.create(Quotas.procZookeeper, null, ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| zk.create(Quotas.quotaZookeeper, null, ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| } catch (KeeperException.NodeExistsException ne) { |
| // do nothing |
| } |
| } |
| |
| // now create the direct children |
| // and the stat and quota nodes |
| String[] splits = path.split("/"); |
| StringBuilder sb = new StringBuilder(); |
| sb.append(quotaPath); |
| for (int i = 1; i < splits.length; i++) { |
| sb.append("/").append(splits[i]); |
| quotaPath = sb.toString(); |
| try { |
| zk.create(quotaPath, null, ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| } catch (KeeperException.NodeExistsException ne) { |
| //do nothing |
| } |
| } |
| String statPath = quotaPath + "/" + Quotas.statNode; |
| quotaPath = quotaPath + "/" + Quotas.limitNode; |
| StatsTrack strack = new StatsTrack(null); |
| strack.setBytes(bytes); |
| strack.setCount(numNodes); |
| try { |
| zk.create(quotaPath, strack.toString().getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| StatsTrack stats = new StatsTrack(null); |
| stats.setBytes(0L); |
| stats.setCount(0); |
| zk.create(statPath, stats.toString().getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| } catch (KeeperException.NodeExistsException ne) { |
| byte[] data = zk.getData(quotaPath, false, new Stat()); |
| StatsTrack strackC = new StatsTrack(new String(data)); |
| if (bytes != -1L) { |
| strackC.setBytes(bytes); |
| } |
| if (numNodes != -1) { |
| strackC.setCount(numNodes); |
| } |
| zk.setData(quotaPath, strackC.toString().getBytes(), -1); |
| } |
| return true; |
| } |
| |
| private static void checkIfChildQuota(ZooKeeper zk, String path) throws KeeperException, InterruptedException { |
| String realPath = Quotas.quotaZookeeper + path; |
| |
| try { |
| ZKUtil.visitSubTreeDFS(zk, realPath, false, (rc, quotaPath, ctx, name) -> { |
| List<String> children = new ArrayList<>(); |
| try { |
| children = zk.getChildren(quotaPath, false); |
| } catch (KeeperException.NoNodeException ne) { |
| LOG.debug("child removed during quota check", ne); |
| return; |
| } catch (InterruptedException | KeeperException e) { |
| e.printStackTrace(); |
| } |
| |
| if (children.size() == 0) { |
| return; |
| } |
| for (String child : children) { |
| if (!quotaPath.equals(Quotas.quotaZookeeper + path) && Quotas.limitNode.equals(child)) { |
| throw new IllegalArgumentException(path + " has a child " + quotaPath.substring(Quotas.quotaZookeeper.length()) + " which has a quota"); |
| } |
| } |
| }); |
| } catch (KeeperException.NoNodeException ne) { |
| // this is fine |
| } |
| } |
| |
| private static void checkIfParentQuota(ZooKeeper zk, String path) throws InterruptedException, KeeperException { |
| final String[] splits = path.split("/"); |
| String quotaPath = Quotas.quotaZookeeper; |
| for (String str : splits) { |
| if (str.length() == 0) { |
| // this should only be for the beginning of the path |
| // i.e. "/..." - split(path)[0] is empty string before first '/' |
| continue; |
| } |
| quotaPath += "/" + str; |
| List<String> children = null; |
| try { |
| children = zk.getChildren(quotaPath, false); |
| } catch (KeeperException.NoNodeException ne) { |
| LOG.debug("child removed during quota check", ne); |
| return; |
| } |
| if (children.size() == 0) { |
| return; |
| } |
| for (String child : children) { |
| if (!quotaPath.equals(Quotas.quotaZookeeper + path) && Quotas.limitNode.equals(child)) { |
| throw new IllegalArgumentException(path + " has a parent " + quotaPath.substring(Quotas.quotaZookeeper.length()) + " which has a quota"); |
| } |
| } |
| } |
| } |
| |
| } |