Java tutorial
/* * Copyright 2019 ThoughtWorks, Inc. * * Licensed 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 com.thoughtworks.go.server.service.lookups; import com.thoughtworks.go.serverhealth.HealthStateType; import com.thoughtworks.go.serverhealth.ServerHealthService; import com.thoughtworks.go.serverhealth.ServerHealthState; import com.thoughtworks.go.util.FileUtil; import com.thoughtworks.go.util.SystemEnvironment; import org.apache.commons.io.DirectoryWalker; import org.apache.commons.io.FileUtils; import org.apache.commons.io.FilenameUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Collection; import java.util.List; import static java.nio.charset.StandardCharsets.UTF_8; @Component public class CommandRepositoryDirectoryWalker extends DirectoryWalker { private static final String XML_EXTENSION = "xml"; private final ServerHealthService serverHealthService; private SystemEnvironment systemEnvironment; private CommandSnippetXmlParser commandSnippetXmlParser; private static final Logger LOGGER = LoggerFactory.getLogger(CommandRepositoryDirectoryWalker.class); private ThreadLocal<String> commandRepositoryBaseDirectory = new ThreadLocal<>(); @Autowired public CommandRepositoryDirectoryWalker(ServerHealthService serverHealthService, SystemEnvironment systemEnvironment) { this.serverHealthService = serverHealthService; this.systemEnvironment = systemEnvironment; commandSnippetXmlParser = new CommandSnippetXmlParser(); } @Override protected void handleFile(File file, int depth, Collection results) { String fileName = file.getName(); if (!FilenameUtils.getExtension(fileName).equalsIgnoreCase(XML_EXTENSION)) { return; } String xmlContentOfFie = safeReadFileToString(file); if (xmlContentOfFie == null || !file.canRead()) { serverHealthService.update(ServerHealthState.warning("Command Repository", "Failed to access command snippet XML file located in Go Server Directory at " + file.getPath() + ". Go does not have sufficient permissions to access it.", HealthStateType.commandRepositoryAccessibilityIssue(), systemEnvironment.getCommandRepoWarningTimeout())); LOGGER.warn( "[Command Repository] Failed to access command snippet XML file located in Go Server Directory at {}. Go does not have sufficient permissions to access it.", file.getAbsolutePath()); return; } try { String relativeFilePath = FileUtil.removeLeadingPath(commandRepositoryBaseDirectory.get(), file.getAbsolutePath()); results.add(commandSnippetXmlParser.parse(xmlContentOfFie, FilenameUtils.getBaseName(fileName), relativeFilePath)); } catch (Exception e) { LOGGER.warn("Failed loading command snippet from {}", file.getAbsolutePath()); LOGGER.debug(null, e); } } private String safeReadFileToString(File file) { try { return FileUtils.readFileToString(file, UTF_8); } catch (IOException e) { return null; } } @Override protected boolean handleDirectory(File directory, int depth, Collection results) { if (FileUtil.isHidden(directory)) { return false; } if (!FileUtil.isDirectoryReadable(directory)) { String message = String.format("Failed to access command repository directory: %s.", directory.getPath()); serverHealthService.update(ServerHealthState.warning("Command Repository", message, HealthStateType.commandRepositoryAccessibilityIssue(), systemEnvironment.getCommandRepoWarningTimeout())); LOGGER.warn(message); return false; } return true; } public CommandSnippets getAllCommandSnippets(String repositoryDirectory) { serverHealthService .update(ServerHealthState.success(HealthStateType.commandRepositoryAccessibilityIssue())); try { File commandRepositoryDirectory = new File(repositoryDirectory); //adding the exists check till packaging command repository with Go story is played. if (commandRepositoryDirectory.isDirectory() && commandRepositoryDirectory.canRead() && commandRepositoryDirectory.canExecute()) { return new CommandSnippets(walk(commandRepositoryDirectory)); } else { throw new IOException("Failed to access command repository located in Go Server Directory at " + repositoryDirectory + ". The directory does not exist or Go does not have sufficient permissions to access it."); } } catch (IOException e) { ServerHealthState serverHealthState = ServerHealthState.warning("Command Repository", e.getMessage(), HealthStateType.commandRepositoryAccessibilityIssue(), systemEnvironment.getCommandRepoWarningTimeout()); serverHealthService.update(serverHealthState); LOGGER.warn(e.getMessage()); } return new CommandSnippets(new ArrayList<>()); } private List<CommandSnippet> walk(File commandRepositoryDirectory) throws IOException { this.commandRepositoryBaseDirectory.set(commandRepositoryDirectory.getAbsolutePath()); List<CommandSnippet> commandSnippets = new ArrayList<>(); walk(commandRepositoryDirectory, commandSnippets); return commandSnippets; } }