1 /* 2 * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.openjdk.skara.bots.hgbridge; 24 25 import org.openjdk.skara.bot.*; 26 import org.openjdk.skara.vcs.Repository; 27 28 import java.io.*; 29 import java.net.URLEncoder; 30 import java.nio.charset.StandardCharsets; 31 import java.nio.file.*; 32 import java.util.List; 33 import java.util.logging.Logger; 34 35 public class JBridgeBot implements Bot, WorkItem { 36 private final ExporterConfig exporterConfig; 37 private final Path storage; 38 private final Logger log = Logger.getLogger("org.openjdk.bots.hgbridge"); 39 40 JBridgeBot(ExporterConfig exporterConfig, Path storage) { 41 this.exporterConfig = exporterConfig; 42 this.storage = storage.resolve(URLEncoder.encode(exporterConfig.source().toString(), StandardCharsets.UTF_8)); 43 } 44 45 @Override 46 public String toString() { 47 return "JBridgeBot@" + exporterConfig.source(); 48 } 49 50 @Override 51 public List<WorkItem> getPeriodicItems() { 52 return List.of(this); 53 } 54 55 @Override 56 public boolean concurrentWith(WorkItem other) { 57 if (other instanceof JBridgeBot) { 58 JBridgeBot otherBridgeBot = (JBridgeBot)other; 59 return !exporterConfig.source().equals(otherBridgeBot.exporterConfig.source()); 60 } else { 61 return true; 62 } 63 } 64 65 private void pushMarks(Path markSource, String destName, Path markScratchPath) throws IOException { 66 var marksRepo = Repository.materialize(markScratchPath, exporterConfig.marksRepo().url(), exporterConfig.marksRef()); 67 68 // We should never change existing marks 69 var markDest = markScratchPath.resolve(destName); 70 var updated = Files.readString(markSource); 71 if (Files.exists(markDest)) { 72 var existing = Files.readString(markDest); 73 74 if (!updated.startsWith(existing)) { 75 throw new RuntimeException("Update containing conflicting marks!"); 76 } 77 if (existing.equals(updated)) { 78 // Nothing new to push 79 return; 80 } 81 } else { 82 if (!Files.exists(markDest.getParent())) { 83 Files.createDirectories(markDest.getParent()); 84 } 85 } 86 87 Files.writeString(markDest, updated, StandardCharsets.UTF_8); 88 marksRepo.add(markDest); 89 var hash = marksRepo.commit("Updated marks", exporterConfig.marksAuthorName(), exporterConfig.marksAuthorEmail()); 90 marksRepo.push(hash, exporterConfig.marksRepo().url(), exporterConfig.marksRef()); 91 } 92 93 @Override 94 public void run(Path scratchPath) { 95 log.fine("Running export for " + exporterConfig.source().toString()); 96 97 try { 98 var converter = exporterConfig.resolve(scratchPath.resolve("converter")); 99 var marksFile = scratchPath.resolve("marks.txt"); 100 var exported = Exporter.export(converter, exporterConfig.source(), storage, marksFile); 101 102 // Push updated marks - other marks files may be updated concurrently, so try a few times 103 var retryCount = 0; 104 while (exported.isPresent()) { 105 try { 106 pushMarks(marksFile, 107 exporterConfig.source().getHost() + "/" + exporterConfig.source().getPath() + "/marks.txt", 108 scratchPath.resolve("markspush")); 109 break; 110 } catch (IOException e) { 111 retryCount++; 112 if (retryCount > 10) { 113 log.warning("Retry count exceeded for pushing marks"); 114 throw new UncheckedIOException(e); 115 } 116 } 117 } 118 119 IOException lastException = null; 120 for (var destination : exporterConfig.destinations()) { 121 var markerBase = destination.url().getHost() + "/" + destination.name(); 122 var successfulPushMarker = storage.resolve(URLEncoder.encode(markerBase, StandardCharsets.UTF_8) + ".success.txt"); 123 if (exported.isPresent() || !successfulPushMarker.toFile().isFile()) { 124 var repo = exported.orElse(Exporter.current(storage).orElseThrow()); 125 try { 126 Files.deleteIfExists(successfulPushMarker); 127 repo.pushAll(destination.url()); 128 storage.resolve(successfulPushMarker).toFile().createNewFile(); 129 } catch (IOException e) { 130 log.severe("Failed to push to " + destination.url()); 131 log.throwing("JBridgeBot", "run", e); 132 lastException = e; 133 } 134 } else { 135 log.fine("No changes detected in " + exporterConfig.source() + " - skipping push to " + destination.name()); 136 } 137 } 138 if (lastException != null) { 139 throw new UncheckedIOException(lastException); 140 } 141 } catch (IOException e) { 142 throw new UncheckedIOException(e); 143 } 144 } 145 }