Java tutorial
/* * Hello Minecraft! Launcher. * Copyright (C) 2013 huangyuhui <huanghongxun2008@126.com> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see {http://www.gnu.org/licenses/}. */ package org.jackhuang.hellominecraft.launcher.core.download; import org.jackhuang.hellominecraft.launcher.core.service.IMinecraftDownloadService; import com.google.gson.JsonSyntaxException; import java.io.File; import java.util.ArrayList; import java.util.Arrays; import java.util.Collection; import java.util.HashSet; import java.util.List; import org.jackhuang.hellominecraft.util.C; import org.jackhuang.hellominecraft.util.logging.HMCLog; import org.jackhuang.hellominecraft.launcher.core.GameException; import org.jackhuang.hellominecraft.launcher.core.service.IMinecraftService; import org.jackhuang.hellominecraft.launcher.core.version.GameDownloadInfo; import org.jackhuang.hellominecraft.launcher.core.version.IMinecraftLibrary; import org.jackhuang.hellominecraft.launcher.core.version.MinecraftVersion; import org.jackhuang.hellominecraft.util.tasks.download.FileDownloadTask; import org.jackhuang.hellominecraft.util.func.Function; import org.jackhuang.hellominecraft.util.system.FileUtils; import org.jackhuang.hellominecraft.util.tasks.Task; import org.jackhuang.hellominecraft.util.tasks.TaskInfo; /** * * @author huangyuhui */ public class MinecraftDownloadService extends IMinecraftDownloadService { public MinecraftDownloadService(IMinecraftService service) { super(service); } @Override public List<DownloadLibraryJob> getDownloadLibraries(MinecraftVersion mv) throws GameException { ArrayList<DownloadLibraryJob> downloadLibraries = new ArrayList<>(); if (mv == null) return downloadLibraries; MinecraftVersion v = mv.resolve(service.version()); for (IMinecraftLibrary l : v.getLibraries()) if (l != null && l.allow() && l.getDownloadInfo() != null) { File ff = l.getFilePath(service.baseDirectory()); if (!ff.exists()) { String libURL = l.getDownloadInfo().getUrl(service.getDownloadType()); if (libURL != null) downloadLibraries.add(new DownloadLibraryJob(l, libURL, ff)); } } return downloadLibraries; } @Override public Task downloadMinecraft(String id) { return new TaskInfo("Download Minecraft") { @Override public Collection<Task> getDependTasks() { return Arrays.asList(downloadMinecraftVersionJson(id)); } @Override public void executeTask() throws Throwable { File vpath = new File(service.baseDirectory(), "versions/" + id); if (!areDependTasksSucceeded) { FileUtils.deleteDirectory(vpath); throw new RuntimeException("Cannot continue because of download failing."); } File mvj = new File(vpath, id + ".jar"); if (mvj.exists() && !mvj.delete()) HMCLog.warn("Failed to delete " + mvj); try { MinecraftVersion mv = C.GSON.fromJson(FileUtils.readQuietly(new File(vpath, id + ".json")), MinecraftVersion.class); if (mv == null) throw new JsonSyntaxException("incorrect version"); afters.add(downloadMinecraftJar(mv, mvj)); } catch (JsonSyntaxException ex) { HMCLog.err("Failed to parse minecraft version json.", ex); FileUtils.deleteDirectory(vpath); } } Collection<Task> afters = new HashSet<>(); @Override public Collection<Task> getAfterTasks() { return afters; } }; } private static class DownloadTypeSwitcher implements Function<Integer, String> { String suffix; public DownloadTypeSwitcher(String suffix) { this.suffix = suffix; } @Override public String apply(Integer t) { return DownloadType.values()[t / 2].getProvider().getVersionsDownloadURL() + suffix; } } @Override public Task downloadMinecraftJar(MinecraftVersion mv, File mvj) { GameDownloadInfo i = mv.getClientDownloadInfo(); return new FileDownloadTask(i.getUrl(service.getDownloadType()), mvj, i.sha1) .setFailedCallbackReturnsNewURL(new DownloadTypeSwitcher(mv.id + "/" + mv.id + ".jar")) .setTag(mv.id + ".jar"); } @Override public Task downloadMinecraftVersionJson(String id) { return new TaskInfo("Download Minecraft Json") { @Override public void executeTask() throws Throwable { List<MinecraftRemoteVersion> versions = MinecraftRemoteVersions .getRemoteVersions(service.getDownloadType()).justDo(); MinecraftRemoteVersion currentVersion = null; for (MinecraftRemoteVersion v : versions) if (id.equals(v.id)) { currentVersion = v; break; } if (currentVersion == null) throw new RuntimeException("Cannot find version: " + id + " in remote repository."); String jsonURL = currentVersion.getUrl(service.getDownloadType()); File vpath = new File(service.baseDirectory(), "versions/" + id); File mvt = new File(vpath, id + ".json"); if (!vpath.exists() && !vpath.mkdirs()) HMCLog.warn("Failed to make directories: " + vpath); if (mvt.exists() && !mvt.delete()) HMCLog.warn("Failed to delete " + mvt); afters.add(new FileDownloadTask(jsonURL, mvt).setTag(id + ".json")); } Collection<Task> afters = new HashSet<>(); @Override public Collection<Task> getAfterTasks() { return afters; } }; } }