| // 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.doris.common.proc; |
| |
| import org.apache.doris.catalog.Catalog; |
| import org.apache.doris.common.AnalysisException; |
| |
| import com.google.common.base.Strings; |
| |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| |
| // proc service entry |
| public final class ProcService { |
| private static final Logger LOG = LogManager.getLogger(ProcService.class); |
| private static ProcService INSTANCE; |
| |
| private BaseProcDir root; |
| |
| private ProcService() { |
| root = new BaseProcDir(); |
| root.register("auth", new AuthProcDir(Catalog.getCurrentCatalog().getAuth())); |
| root.register("backends", new BackendsProcDir(Catalog.getCurrentSystemInfo())); |
| root.register("dbs", new DbsProcDir(Catalog.getInstance())); |
| root.register("jobs", new JobsDbProcDir(Catalog.getInstance())); |
| root.register("statistic", new StatisticProcDir(Catalog.getInstance())); |
| root.register("tasks", new TasksProcDir()); |
| root.register("frontends", new FrontendsProcNode(Catalog.getInstance())); |
| root.register("brokers", Catalog.getInstance().getBrokerMgr().getProcNode()); |
| root.register("load_error_hub", new LoadErrorHubProcNode(Catalog.getInstance())); |
| root.register("transactions", new TransDbProcDir()); |
| root.register("monitor", new MonitorProcDir()); |
| root.register("current_queries", new CurrentQueryStatisticsProcDir()); |
| root.register("current_backend_instances", new CurrentQueryBackendInstanceProcDir()); |
| root.register("cluster_balance", new ClusterBalanceProcDir()); |
| root.register("routine_loads", new RoutineLoadsProcDir()); |
| root.register("colocation_group", new ColocationGroupProcDir()); |
| } |
| |
| // 通过指定的路径获得对应的PROC Node |
| // 当前不支持"..",“.”这些通/配符,但是能够处理'//'这样的情况 |
| // 对于space:之前的space字段可以过滤掉,后面在遇到space字段就直接终止 |
| public ProcNodeInterface open(String path) throws AnalysisException { |
| // input is invalid |
| if (Strings.isNullOrEmpty(path)) { |
| throw new AnalysisException("Path is null"); |
| } |
| |
| int last = 0; |
| int pos = 0; |
| int len = path.length(); |
| boolean meetRoot = false; |
| boolean meetEnd = false; |
| ProcNodeInterface curNode = null; |
| |
| while (pos < len && !meetEnd) { |
| char ch = path.charAt(pos); |
| switch (ch) { |
| case '/': |
| if (!meetRoot) { |
| curNode = root; |
| meetRoot = true; |
| } else { |
| String name = path.substring(last, pos); |
| if (!(curNode instanceof ProcDirInterface)) { |
| String errMsg = path.substring(0, pos) + " is not a directory"; |
| LOG.warn(errMsg); |
| throw new AnalysisException(errMsg); |
| } |
| curNode = ((ProcDirInterface) curNode).lookup(name); |
| } |
| // swallow next "/" |
| while (pos < len && path.charAt(pos) == '/') { |
| pos++; |
| } |
| // now assign last from pos(new start of file name) |
| last = pos; |
| break; |
| case ' ': |
| case '\t': |
| case '\r': |
| case '\n': |
| if (meetRoot) { |
| meetEnd = true; |
| } else { |
| last++; |
| pos++; |
| } |
| break; |
| default: |
| if (!meetRoot) { |
| // starts without '/' |
| String errMsg = "Path(" + path + ") does not start with '/'"; |
| LOG.warn(errMsg); |
| throw new AnalysisException(errMsg); |
| } |
| pos++; |
| break; |
| } |
| } |
| // the last character of path is '/', the current is must a directory |
| if (pos == last) { |
| // now pos == path.length() |
| if (curNode == null || !(curNode instanceof ProcDirInterface)) { |
| String errMsg = path + " is not a directory"; |
| LOG.warn(errMsg); |
| throw new AnalysisException(errMsg); |
| } |
| return curNode; |
| } |
| |
| if (!(curNode instanceof ProcDirInterface)) { |
| String errMsg = path.substring(0, pos) + " is not a directory"; |
| LOG.warn(errMsg); |
| throw new AnalysisException(errMsg); |
| } |
| |
| // 这里使用pos,因为有可能path后面会有space字段被提前截断 |
| curNode = ((ProcDirInterface) curNode).lookup(path.substring(last, pos)); |
| if (curNode == null) { |
| throw new AnalysisException("Cannot find path: " + path); |
| } |
| return curNode; |
| } |
| |
| // 将node注册到根节点下的name下 |
| public synchronized boolean register(String name, ProcNodeInterface node) { |
| if (Strings.isNullOrEmpty(name) || node == null) { |
| LOG.warn("register porc service invalid input."); |
| return false; |
| } |
| if (root.lookup(name) != null) { |
| LOG.warn("node(" + name + ") already exists."); |
| return false; |
| } |
| return root.register(name, node); |
| } |
| |
| public static ProcService getInstance() { |
| if (INSTANCE == null) { |
| INSTANCE = new ProcService(); |
| } |
| return INSTANCE; |
| } |
| |
| // 用于测试的时候将已经注册的内容进行清空 |
| public static void destroy() { |
| INSTANCE = null; |
| } |
| |
| } |