| /* |
| * 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.io.IOException; |
| 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.KeeperException; |
| import org.apache.zookeeper.Quotas; |
| import org.apache.zookeeper.StatsTrack; |
| import org.apache.zookeeper.ZooKeeper; |
| import org.apache.zookeeper.data.Stat; |
| |
| /** |
| * delQuota command for cli |
| */ |
| public class DelQuotaCommand extends CliCommand { |
| |
| private Options options = new Options(); |
| private String[] args; |
| private CommandLine cl; |
| |
| public DelQuotaCommand() { |
| super("delquota", "[-n|-b] path"); |
| |
| OptionGroup og1 = new OptionGroup(); |
| og1.addOption(new Option("b", false, "bytes quota")); |
| og1.addOption(new Option("n", false, "num quota")); |
| 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 { |
| //if neither option -n or -b is specified, we delete |
| // the quota node for this node. |
| String path = args[1]; |
| try { |
| if (cl.hasOption("b")) { |
| delQuota(zk, path, true, false); |
| } else if (cl.hasOption("n")) { |
| delQuota(zk, path, false, true); |
| } else if (args.length == 2) { |
| // we don't have an option specified. |
| // just delete whole quota node |
| delQuota(zk, path, true, true); |
| } |
| } catch (KeeperException | InterruptedException | IOException ex) { |
| throw new CliWrapperException(ex); |
| } |
| return false; |
| } |
| |
| /** |
| * this method deletes quota for a node. |
| * |
| * @param zk the zookeeper client |
| * @param path the path to delete quota for |
| * @param bytes true if number of bytes needs to be unset |
| * @param numNodes true if number of nodes needs to be unset |
| * @return true if quota deletion is successful |
| * @throws KeeperException |
| * @throws IOException |
| * @throws InterruptedException |
| */ |
| public static boolean delQuota( |
| ZooKeeper zk, |
| String path, |
| boolean bytes, |
| boolean numNodes) throws KeeperException, IOException, InterruptedException, MalformedPathException { |
| String parentPath = Quotas.quotaZookeeper + path; |
| String quotaPath = Quotas.quotaZookeeper + path + "/" + Quotas.limitNode; |
| if (zk.exists(quotaPath, false) == null) { |
| System.out.println("Quota does not exist for " + path); |
| return true; |
| } |
| byte[] data = null; |
| try { |
| data = zk.getData(quotaPath, false, new Stat()); |
| } catch (IllegalArgumentException ex) { |
| throw new MalformedPathException(ex.getMessage()); |
| } catch (KeeperException.NoNodeException ne) { |
| System.err.println("quota does not exist for " + path); |
| return true; |
| } |
| StatsTrack strack = new StatsTrack(new String(data)); |
| if (bytes && !numNodes) { |
| strack.setBytes(-1L); |
| zk.setData(quotaPath, strack.toString().getBytes(), -1); |
| } else if (!bytes && numNodes) { |
| strack.setCount(-1); |
| zk.setData(quotaPath, strack.toString().getBytes(), -1); |
| } else if (bytes && numNodes) { |
| // delete till you can find a node with more than |
| // one child |
| List<String> children = zk.getChildren(parentPath, false); |
| /// delete the direct children first |
| for (String child : children) { |
| zk.delete(parentPath + "/" + child, -1); |
| } |
| // cut the tree till their is more than one child |
| trimProcQuotas(zk, parentPath); |
| } |
| return true; |
| } |
| |
| /** |
| * trim the quota tree to recover unwanted tree elements in the quota's tree |
| * |
| * @param zk the zookeeper client |
| * @param path the path to start from and go up and see if their is any |
| * unwanted parent in the path. |
| * @return true if successful |
| * @throws KeeperException |
| * @throws IOException |
| * @throws InterruptedException |
| */ |
| private static boolean trimProcQuotas( |
| ZooKeeper zk, |
| String path) throws KeeperException, IOException, InterruptedException { |
| if (Quotas.quotaZookeeper.equals(path)) { |
| return true; |
| } |
| List<String> children = zk.getChildren(path, false); |
| if (children.size() == 0) { |
| zk.delete(path, -1); |
| String parent = path.substring(0, path.lastIndexOf('/')); |
| return trimProcQuotas(zk, parent); |
| } else { |
| return true; |
| } |
| } |
| |
| } |