| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.server; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Set; |
| import org.apache.jute.BinaryInputArchive; |
| import org.apache.jute.InputArchive; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.apache.zookeeper.server.persistence.FileSnap; |
| import org.apache.zookeeper.server.persistence.SnapStream; |
| |
| /** |
| * Recursively processes a snapshot file collecting child node count and summarizes the data size |
| * below each node. |
| * "starting_node" defines the node where the recursion starts |
| * "max_depth" defines the depth where the tool still writes to the output. |
| * 0 means there is no depth limit, every non-leaf node's stats will be displayed, 1 means it will |
| * only contain the starting node's and it's children's stats, 2 ads another level and so on. |
| * This ONLY affects the level of details displayed, NOT the calculation. |
| */ |
| @InterfaceAudience.Public public class SnapshotRecursiveSummary { |
| |
| /** |
| * USAGE: SnapsotRecursiveSummary snapshot_file starting_node max_depth |
| * |
| */ |
| public static void main(String[] args) throws Exception { |
| if (args.length != 3) { |
| System.err.println(getUsage()); |
| System.exit(2); |
| } |
| int maxDepth = 0; |
| try { |
| maxDepth = Integer.parseInt(args[2]); |
| } catch (NumberFormatException e) { |
| System.err.println(getUsage()); |
| System.exit(2); |
| } |
| |
| new SnapshotRecursiveSummary().run(args[0], args[1], maxDepth); |
| } |
| |
| public void run(String snapshotFileName, String startingNode, int maxDepth) throws IOException { |
| File snapshotFile = new File(snapshotFileName); |
| try (InputStream is = SnapStream.getInputStream(snapshotFile)) { |
| InputArchive ia = BinaryInputArchive.getArchive(is); |
| |
| FileSnap fileSnap = new FileSnap(null); |
| |
| DataTree dataTree = new DataTree(); |
| Map<Long, Integer> sessions = new HashMap<Long, Integer>(); |
| |
| fileSnap.deserialize(dataTree, sessions, ia); |
| |
| printZnodeDetails(dataTree, startingNode, maxDepth); |
| } |
| } |
| |
| private void printZnodeDetails(DataTree dataTree, String startingNode, int maxDepth) { |
| StringBuilder builder = new StringBuilder(); |
| printZnode(dataTree, startingNode, builder, 0, maxDepth); |
| System.out.println(builder); |
| } |
| |
| private long[] printZnode(DataTree dataTree, String name, StringBuilder builder, int level, |
| int maxDepth) { |
| DataNode n = dataTree.getNode(name); |
| Set<String> children; |
| long dataSum = 0L; |
| synchronized (n) { // keep findbugs happy |
| if (n.data != null) { |
| dataSum += n.data.length; |
| } |
| children = n.getChildren(); |
| } |
| |
| long[] result = {1L, dataSum}; |
| if (children.size() == 0) { |
| return result; |
| } |
| StringBuilder childBuilder = new StringBuilder(); |
| for (String child : children) { |
| long[] childResult = |
| printZnode(dataTree, name + (name.equals("/") ? "" : "/") + child, childBuilder, |
| level + 1, maxDepth); |
| result[0] = result[0] + childResult[0]; |
| result[1] = result[1] + childResult[1]; |
| } |
| |
| if (maxDepth == 0 || level <= maxDepth) { |
| String tab = String.join("", Collections.nCopies(level, "--")); |
| builder.append(tab + " " + name + "\n"); |
| builder.append(tab + " children: " + (result[0] - 1) + "\n"); |
| builder.append(tab + " data: " + result[1] + "\n"); |
| builder.append(childBuilder); |
| } |
| return result; |
| } |
| |
| public static String getUsage() { |
| String newLine = System.getProperty("line.separator"); |
| return String.join(newLine, |
| "USAGE:", |
| newLine, |
| "SnapshotRecursiveSummary <snapshot_file> <starting_node> <max_depth>", |
| newLine, |
| "snapshot_file: path to the zookeeper snapshot", |
| "starting_node: the path in the zookeeper tree where the traversal should begin", |
| "max_depth: defines the depth where the tool still writes to the output. " |
| + "0 means there is no depth limit, every non-leaf node's stats will be displayed, " |
| + "1 means it will only contain the starting node's and it's children's stats, " |
| + "2 ads another level and so on. This ONLY affects the level of details displayed, " |
| + "NOT the calculation."); |
| } |
| } |