Java tutorial
/* * SK's Minecraft Launcher * Copyright (C) 2010-2014 Albert Pham <http://www.sk89q.com> and contributors * Please see LICENSE.txt for license information. */ package com.skcraft.launcher.update; import com.fasterxml.jackson.databind.ObjectMapper; import com.skcraft.concurrency.DefaultProgress; import com.skcraft.concurrency.ProgressFilter; import com.skcraft.concurrency.ProgressObservable; import com.skcraft.launcher.Instance; import com.skcraft.launcher.Launcher; import com.skcraft.launcher.LauncherException; import com.skcraft.launcher.install.Installer; import com.skcraft.launcher.model.minecraft.VersionManifest; import com.skcraft.launcher.model.modpack.Manifest; import com.skcraft.launcher.persistence.Persistence; import com.skcraft.launcher.util.HttpRequest; import lombok.Getter; import lombok.NonNull; import lombok.Setter; import lombok.extern.java.Log; import java.io.File; import java.io.IOException; import java.net.URL; import java.util.ArrayList; import java.util.List; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import java.util.logging.Level; import static com.skcraft.launcher.util.HttpRequest.url; import static com.skcraft.launcher.util.SharedLocale._; @Log public class Updater extends BaseUpdater implements Callable<Instance>, ProgressObservable { private final ObjectMapper mapper = new ObjectMapper(); private final Installer installer; private final Launcher launcher; private final Instance instance; @Getter @Setter private boolean online; private List<URL> librarySources = new ArrayList<URL>(); private List<URL> assetsSources = new ArrayList<URL>(); private ProgressObservable progress = new DefaultProgress(-1, _("instanceUpdater.preparingUpdate")); public Updater(@NonNull Launcher launcher, @NonNull Instance instance) { super(launcher); this.installer = new Installer(launcher.getInstallerDir()); this.launcher = launcher; this.instance = instance; librarySources.add(launcher.propUrl("librariesSource")); assetsSources.add(launcher.propUrl("assetsSource")); } @Override public Instance call() throws Exception { log.info("Checking for an update for '" + instance.getName() + "'..."); boolean updateRequired = !instance.isInstalled(); boolean updateDesired = (instance.isUpdatePending() || updateRequired); boolean updateCapable = (instance.getManifestURL() != null); if (!online && updateRequired) { log.info("Can't update " + instance.getTitle() + " because offline"); String message = _("updater.updateRequiredButOffline"); throw new LauncherException("Update required but currently offline", message); } if (updateDesired && !updateCapable) { if (updateRequired) { log.info("Update required for " + instance.getTitle() + " but there is no manifest"); String message = _("updater.updateRequiredButNoManifest"); throw new LauncherException("Update required but no manifest", message); } else { log.info("Can't update " + instance.getTitle() + ", but update is not required"); return instance; // Can't update } } if (updateDesired) { log.info("Updating " + instance.getTitle() + "..."); update(instance); } else { log.info("No update found for " + instance.getTitle()); } return instance; } private VersionManifest readVersionManifest(Manifest manifest) throws IOException, InterruptedException { // Check whether the package manifest contains an embedded version manifest, // otherwise we'll have to download the one for the given Minecraft version VersionManifest version = manifest.getVersionManifest(); if (version != null) { mapper.writeValue(instance.getVersionPath(), version); return version; } else { URL url = url(String.format(launcher.getProperties().getProperty("versionManifestUrl"), manifest.getGameVersion())); return HttpRequest.get(url).execute().expectResponseCode(200).returnContent() .saveContent(instance.getVersionPath()).asJson(VersionManifest.class); } } /** * Update the given instance. * * @param instance the instance * @throws IOException thrown on I/O error * @throws InterruptedException thrown on interruption * @throws ExecutionException thrown on execution error */ protected void update(Instance instance) throws Exception { // Mark this instance as local instance.setLocal(true); Persistence.commitAndForget(instance); // Read manifest log.info("Reading package manifest..."); progress = new DefaultProgress(-1, _("instanceUpdater.readingManifest")); Manifest manifest = installPackage(installer, instance); // Update instance from manifest manifest.update(instance); // Read version manifest log.info("Reading version manifest..."); progress = new DefaultProgress(-1, _("instanceUpdater.readingVersion")); VersionManifest version = readVersionManifest(manifest); progress = new DefaultProgress(-1, _("instanceUpdater.buildingDownloadList")); // Install the .jar File jarPath = launcher.getJarPath(version); URL jarSource = launcher.propUrl("jarUrl", version.getId()); log.info("JAR at " + jarPath.getAbsolutePath() + ", fetched from " + jarSource); installJar(installer, jarPath, jarSource); // Download libraries log.info("Enumerating libraries to download..."); URL url = manifest.getLibrariesUrl(); if (url != null) { log.info("Added library source: " + url); librarySources.add(url); } progress = new DefaultProgress(-1, _("instanceUpdater.collectingLibraries")); installLibraries(installer, version, launcher.getLibrariesDir(), librarySources); // Download assets log.info("Enumerating assets to download..."); progress = new DefaultProgress(-1, _("instanceUpdater.collectingAssets")); installAssets(installer, version, launcher.propUrl("assetsIndexUrl", version.getAssetsIndex()), assetsSources); log.info("Executing download phase..."); progress = ProgressFilter.between(installer.getDownloader(), 0, 0.98); installer.download(); log.info("Executing install phase..."); progress = ProgressFilter.between(installer, 0.98, 1); installer.execute(); log.info("Completing..."); complete(); // Update the instance's information log.info("Writing instance information..."); instance.setVersion(manifest.getVersion()); instance.setUpdatePending(false); instance.setInstalled(true); instance.setLocal(true); Persistence.commitAndForget(instance); log.log(Level.INFO, instance.getName() + " has been updated to version " + manifest.getVersion() + "."); } @Override public double getProgress() { return progress.getProgress(); } @Override public String getStatus() { return progress.getStatus(); } }