Java tutorial
/* * This file is part of Dynamic Surroundings, licensed under the MIT License (MIT). * * Copyright (c) OreCruncher * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package org.blockartistry.mod.DynSurround; import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import org.apache.commons.lang3.StringUtils; import net.minecraft.entity.player.EntityPlayer; import net.minecraft.nbt.NBTTagCompound; import net.minecraft.util.IChatComponent; import net.minecraft.util.StatCollector; import net.minecraftforge.common.MinecraftForge; import net.minecraftforge.fml.common.Loader; import net.minecraftforge.fml.common.event.FMLInterModComms; import net.minecraftforge.fml.common.eventhandler.SubscribeEvent; import net.minecraftforge.fml.common.gameevent.PlayerEvent.PlayerLoggedInEvent; // Modeled after the BuildCraft version check system. public final class VersionCheck implements Runnable { private static final String REMOTE_VERSION_FILE = "https://raw.githubusercontent.com/OreCruncher/BetterRain/master/versions.txt"; private static final int VERSION_CHECK_RETRIES = 3; private static final int VERSION_CHECK_INTERVAL = 10000; public static enum UpdateStatus { UNKNOWN, CURRENT, OUTDATED, COMM_ERROR } public static final SoftwareVersion modVersion = new SoftwareVersion(Module.VERSION); public static SoftwareVersion currentVersion = new SoftwareVersion(); public static UpdateStatus status = UpdateStatus.UNKNOWN; private static final String mcVersion = Loader.instance().getMinecraftModContainer().getVersion(); public static class SoftwareVersion implements Comparable<SoftwareVersion> { public final int major; public final int minor; public final int revision; public final int patch; public final boolean isAlpha; public final boolean isBeta; public SoftwareVersion() { this.major = 0; this.minor = 0; this.revision = 0; this.patch = 0; this.isAlpha = false; this.isBeta = false; } public SoftwareVersion(String versionString) { // This can happen when running in debug if (versionString.charAt(0) == '@') { this.major = 0; this.minor = 0; this.revision = 0; this.patch = 0; this.isAlpha = false; this.isBeta = false; return; } assert versionString != null; assert versionString.length() > 0; isAlpha = StringUtils.containsIgnoreCase(versionString, "ALPHA"); if (isAlpha) versionString = StringUtils.remove(versionString, "ALPHA"); isBeta = StringUtils.containsIgnoreCase(versionString, "BETA"); if (isBeta) versionString = StringUtils.remove(versionString, "BETA"); final String[] parts = StringUtils.split(versionString, "."); final int numComponents = parts.length; assert numComponents >= 3; this.major = Integer.parseInt(parts[0]); this.minor = Integer.parseInt(parts[1]); this.revision = Integer.parseInt(parts[2]); if (numComponents == 4) { this.patch = Integer.parseInt(parts[3]); } else { this.patch = 0; } } @Override public String toString() { final StringBuilder builder = new StringBuilder(); builder.append(this.major).append('.').append(this.minor).append('.').append(this.revision); if (this.patch != 0) builder.append('.').append(this.patch); if (this.isAlpha) builder.append("ALPHA"); if (this.isBeta) builder.append("BETA"); return builder.toString(); } @Override public int compareTo(final SoftwareVersion obj) { if (this.major != obj.major) return this.major - obj.major; if (this.minor != obj.minor) return this.minor - obj.minor; if (this.revision != obj.revision) return this.revision - obj.revision; return this.patch - obj.patch; } } private VersionCheck() { } private static final String CURSE_PROJECT_NAME = "238891"; private static final String MOD_NAME_TEMPLATE = "DynamicSurroundings-1.8.9-[].jar"; public static void register() { if (Loader.isModLoaded("VersionChecker")) { final NBTTagCompound nbt = new NBTTagCompound(); nbt.setString("curseProjectName", CURSE_PROJECT_NAME); nbt.setString("curseFilenameParser", MOD_NAME_TEMPLATE); FMLInterModComms.sendRuntimeMessage(Module.MOD_ID, "VersionChecker", "addVersionCheck", nbt); } if (ModOptions.getOnlineVersionChecking()) { final VersionCheck test = new VersionCheck(); MinecraftForge.EVENT_BUS.register(test); new Thread(test).start(); } } @SubscribeEvent public void playerLogin(final PlayerLoggedInEvent event) { if (event.player instanceof EntityPlayer) { if (status == UpdateStatus.OUTDATED) { final String msg = StatCollector.translateToLocalFormatted("msg.NewVersionAvailable.dsurround", Module.MOD_NAME, currentVersion, CURSE_PROJECT_NAME); final IChatComponent component = IChatComponent.Serializer.jsonToComponent(msg); event.player.addChatMessage(component); } } } private static void versionCheck() { try { String location = REMOTE_VERSION_FILE; HttpURLConnection conn = null; while (location != null && !location.isEmpty()) { URL url = new URL(location); if (conn != null) { conn.disconnect(); } conn = (HttpURLConnection) url.openConnection(); conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 6.0; ru; rv:1.9.0.11) Gecko/2009060215 Firefox/3.0.11 (.NET CLR 3.5.30729)"); conn.connect(); location = conn.getHeaderField("Coordinates"); } if (conn == null) { throw new NullPointerException(); } BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream())); String line; while ((line = reader.readLine()) != null) { String[] tokens = line.split(":"); if (mcVersion.matches(tokens[0])) { currentVersion = new SoftwareVersion(tokens[1]); break; } } status = UpdateStatus.CURRENT; if (modVersion.compareTo(currentVersion) < 0) status = UpdateStatus.OUTDATED; conn.disconnect(); reader.close(); } catch (Exception e) { ModLog.warn("Unable to read remote version data", e); status = UpdateStatus.COMM_ERROR; } } @Override public void run() { int count = 0; ModLog.info("Checking for newer mod version"); try { do { if (count > 0) { ModLog.info("Awaiting attempt %d", count); Thread.sleep(VERSION_CHECK_INTERVAL); } versionCheck(); count++; } while (count < VERSION_CHECK_RETRIES && status == UpdateStatus.COMM_ERROR); } catch (InterruptedException e) { e.printStackTrace(); } switch (status) { case COMM_ERROR: ModLog.warn("Version check failed"); break; case CURRENT: ModLog.info("Dynamic Surroundings version [%s] is the same or newer than the current version [%s]", modVersion, currentVersion); break; case OUTDATED: ModLog.warn("Using outdated version [" + modVersion + "] for Minecraft " + mcVersion + ". Consider updating to " + currentVersion + "."); break; case UNKNOWN: ModLog.warn("Unknown version check status!"); break; default: break; } } }