org.simantics.maps.server/src/org/simantics/district/maps/server/TileserverMapnik.java

   1 package org.simantics.district.maps.server;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.nio.charset.StandardCharsets;
   6 import java.nio.file.DirectoryStream;
   7 import java.nio.file.Files;
   8 import java.nio.file.Path;
   9 import java.nio.file.StandardOpenOption;
  10 import java.util.ArrayList;
  11 import java.util.HashMap;
  12 import java.util.List;
  13 import java.util.Map;
  14 import java.util.Optional;
  15 import java.util.concurrent.TimeUnit;
  16 import java.util.concurrent.atomic.AtomicBoolean;
  17 import java.util.stream.Stream;
  18
  19 import org.simantics.district.maps.server.prefs.MapsServerPreferences;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22 import org.yaml.snakeyaml.Yaml;
  23 import org.zeroturnaround.exec.ProcessExecutor;
  24 import org.zeroturnaround.exec.StartedProcess;
  25 import org.zeroturnaround.exec.stream.slf4j.Slf4jDebugOutputStream;
  26 import org.zeroturnaround.process.PidProcess;
  27 import org.zeroturnaround.process.PidUtil;
  28 import org.zeroturnaround.process.Processes;
  29 import org.zeroturnaround.process.SystemProcess;
  30
  31 import com.fasterxml.jackson.core.JsonParseException;
  32 import com.fasterxml.jackson.databind.JsonMappingException;
  33 import com.fasterxml.jackson.databind.ObjectMapper;
  34
  35 public class TileserverMapnik {
  36
  37     private static final Logger LOGGER = LoggerFactory.getLogger(TileserverMapnik.class);
  38
  39     private SystemProcess process;
  40     private Path serverRoot;
  41
  42     private AtomicBoolean running = new AtomicBoolean(false);
  43
  44     TileserverMapnik(Path serverRoot) {
  45         this.serverRoot = serverRoot.normalize();
  46     }
  47
  48     public boolean isRunning() throws IOException, InterruptedException {
  49         return process == null ? false : process.isAlive() && isReady();
  50     }
  51
  52     public boolean isReady() {
  53         return running.get();
  54     }
  55
  56     public void start(Optional<TileserverStartListener> listener) throws Exception {
  57         // check if existing server is left hanging
  58         if (Files.exists(getPid())) {
  59             String pid = new String(Files.readAllBytes(getPid()));
  60             PidProcess pr = Processes.newPidProcess(Integer.parseInt(pid));
  61             pr.destroyForcefully();
  62         }
  63
  64         // check that npm dependencies are satisfied
  65 //        if (checkAndInstall(null, listener)) {
  66 //            checkAndInstall(ADDITIONAL_DEPENDENCIES[0], listener);
  67 //            checkAndInstall(ADDITIONAL_DEPENDENCIES[1], listener);
  68 //        }
  69
  70         checkConfigJson();
  71         checkTm2Styles();
  72
  73         if (process != null && process.isAlive())
  74             return;
  75
  76         Path tileliveTesseraWin = serverRoot.resolve("dist").resolve("node.exe").normalize().toAbsolutePath();
  77         StartedProcess startedProcess = new ProcessExecutor().directory(serverRoot.resolve("dist").toFile()).destroyOnExit().environment(getEnv())
  78                 .command(tileliveTesseraWin.toString(), "-c", getConfigJson().toString(), "-p", Integer.toString(MapsServerPreferences.defaultPort()))
  79                 .redirectOutput(new Slf4jDebugOutputStream(LOGGER) {
  80
  81                     @Override
  82                     protected void processLine(String line) {
  83                         // Convert to UTF-8 string
  84                         String utf8Line = new String(line.getBytes(), StandardCharsets.UTF_8);
  85                         log.debug(utf8Line);
  86                     }
  87                 }).start();
  88
  89         Process nativeProcess = startedProcess.getProcess();
  90         process = Processes.newStandardProcess(nativeProcess);
  91         int pid = PidUtil.getPid(nativeProcess);
  92         LOGGER.info("Writing pid-file to {} with pid={}", getPid(), pid);
  93         Files.write(getPid(), (pid + "").getBytes(), StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);
  94         running.set(true);
  95         listener.ifPresent(TileserverStartListener::started);
  96     }
  97
  98     private Map<String, String> getEnv() {
  99         Map<String, String> env = new HashMap<>();
 100         env.put("MAPNIK_FONT_PATH", getFonts().toString());
 101         env.put("ICU_DATA", getICU().toString());
 102         return env;
 103     }
 104
 105     public void stop() throws IOException, InterruptedException {
 106         if (process != null && process.isAlive()) {
 107             // gracefully not supported on windows
 108             process.destroyForcefully();
 109             if (!process.waitFor(2000, TimeUnit.MILLISECONDS)) {
 110                 process.destroyForcefully();
 111                 if (process.isAlive())
 112                     LOGGER.error("Could not shutdown TileserverMapnik!");
 113             }
 114             process = null;
 115             Files.delete(getPid());
 116             running.set(false);
 117         }
 118     }
 119
 120     private Path getPid() {
 121         return serverRoot.resolve("pid");
 122     }
 123
 124     public void restart(Optional<TileserverStartListener> listener) throws Exception {
 125         stop();
 126         start(listener);
 127     }
 128
 129 //    private boolean checkIfInstalled(String module) throws Exception {
 130 //        String tileserverMapnik = tileserverMapnikRoot().toString();
 131 //        int retVal;
 132 //        try (ByteArrayOutputStream output = new ByteArrayOutputStream()) {
 133 //            if (module == null) {
 134 //                retVal = NodeJS.npm(output, "--prefix", tileserverMapnik, "list");
 135 //            } else {
 136 //                retVal = NodeJS.npm(output, "--prefix", tileserverMapnik, "list", module);
 137 //            }
 138 //            String outputString = new String(output.toByteArray(), StandardCharsets.UTF_8);
 139 //        }
 140 //        return retVal == 0;
 141 //    }
 142 //
 143 //    private int install(String module, Optional<TileserverStartListener> listener) throws Exception {
 144 //        String tileserverMapnik = tileserverMapnikRoot().toString();
 145 //        int retVal;
 146 //        if (module == null) {
 147 //            listener.ifPresent(l -> l.installing("Installing tileserver-mapnik"));
 148 //            retVal = NodeJS.npm(null, "--prefix", tileserverMapnik, "install", "--save");
 149 //        } else {
 150 //            retVal = NodeJS.npm(null, "--prefix", tileserverMapnik, "install", module, "--save");
 151 //        }
 152 //        if (retVal != 0)
 153 //            LOGGER.warn("Could not install module " + module == null ? "package.json" : module + "! " + retVal);
 154 //        return retVal;
 155 //    }
 156 //
 157 //    private boolean checkAndInstall(String module, Optional<TileserverStartListener> listener) throws Exception {
 158 //        LOGGER.info("Installing module {}", String.valueOf(module));
 159 //        boolean installed = checkIfInstalled(module);
 160 //        if (!installed) {
 161 //            int installSuccessfull = install(module, listener);
 162 //            if (installSuccessfull != 0) {
 163 //                LOGGER.warn("Installation of module {} failed!", String.valueOf(module));
 164 //                listener.ifPresent(l -> l.installationFailed(module, installSuccessfull));
 165 //            }
 166 //        } else {
 167 //            LOGGER.info("Module {} was already installed", String.valueOf(module));
 168 //        }
 169 //        return !installed;
 170 //    }
 171
 172
 173     @SuppressWarnings("unused")
 174         private Path tileserverMapnikRoot() {
 175         return serverRoot.resolve("tileserver-mapnik").toAbsolutePath();
 176     }
 177
 178     private Path getFonts() {
 179         return serverRoot.resolve("fonts").toAbsolutePath();
 180     }
 181
 182     private Path getICU() {
 183         return serverRoot.resolve("dist/share/icu").toAbsolutePath();
 184     }
 185
 186     @SuppressWarnings("unused")
 187         private Path getTessera() {
 188         return serverRoot.resolve("tileserver-mapnik/bin/tessera.js").toAbsolutePath();
 189     }
 190
 191     private Path getConfigJson() {
 192         return serverRoot.resolve("config.json").toAbsolutePath();
 193     }
 194
 195     public List<String> availableMBTiles() throws IOException {
 196         Path data = getDataDirectory();
 197         List<String> result = new ArrayList<>();
 198         try (Stream<Path> paths = Files.walk(data)) {
 199             paths.forEach(p -> {
 200                 if (!p.equals(data)) {
 201                     String tiles = p.getFileName().toString();
 202                     result.add(tiles);
 203                 }
 204             });
 205         }
 206         return result;
 207     }
 208
 209     private void checkConfigJson() throws JsonParseException, JsonMappingException, IOException {
 210         Path configJson = getConfigJson();
 211         Map<String, Object> config = new HashMap<>();
 212         Path tm2 = getStyleDirectory();
 213         try (DirectoryStream<Path> stream = Files.newDirectoryStream(tm2)) {
 214             stream.forEach(p -> {
 215                 Path projectYaml = p.resolve("project.yml");
 216                 if (Files.exists(projectYaml)) {
 217                     // Good
 218
 219                     Map<String, String> source = new HashMap<>();
 220
 221                     Path tm2style = serverRoot.relativize(projectYaml.getParent());
 222
 223                     String prefix = "tmstyle://../";
 224                     String tmStyle = prefix + tm2style.toString();
 225                     source.put("source", tmStyle);
 226                     config.put("/" + projectYaml.getParent().getFileName().toString(), source);
 227                 }
 228             });
 229         }
 230         ObjectMapper mapper = new ObjectMapper();
 231         mapper.writerWithDefaultPrettyPrinter().writeValue(Files.newOutputStream(configJson, StandardOpenOption.TRUNCATE_EXISTING), config);
 232     }
 233
 234     public Path getStyleDirectory() {
 235         return serverRoot.resolve("tm2");
 236     }
 237
 238     public Path getDataDirectory() {
 239         return serverRoot.resolve("data");
 240     }
 241
 242     public Path getCurrentTiles() {
 243         return getDataDirectory().resolve(MapsServerPreferences.currentMBTiles());
 244     }
 245
 246     @SuppressWarnings("unchecked")
 247     public void checkTm2Styles() {
 248         Path tm2 = getStyleDirectory();
 249         try (DirectoryStream<Path> stream = Files.newDirectoryStream(tm2)) {
 250             stream.forEach(p -> {
 251                 Path projectYaml = p.resolve("project.yml");
 252                 Yaml yaml = new Yaml();
 253                 Map<String, String> data = null;
 254                 try (InputStream input = Files.newInputStream(projectYaml, StandardOpenOption.READ)) {
 255                     data = yaml.loadAs(input, Map.class);
 256
 257                     Path tiles = serverRoot.relativize(getCurrentTiles());
 258
 259                     String tmStyle = "mbtiles://../" + tiles.toString();
 260                     data.put("source", tmStyle);
 261
 262                 } catch (IOException e) {
 263                     LOGGER.error("Could not read yaml", e);
 264                 }
 265                 try {
 266                     Files.write(projectYaml, yaml.dump(data).getBytes(), StandardOpenOption.TRUNCATE_EXISTING);
 267                 } catch (IOException e) {
 268                     LOGGER.error("Could not write yaml", e);
 269                 }
 270             });
 271         } catch (IOException e) {
 272             LOGGER.error("Could not browse tm2 styles", e);
 273         }
 274     }
 275
 276     public List<String> listStyles() throws IOException {
 277         List<String> results = new ArrayList<>();
 278         Path tm2 = getStyleDirectory();
 279         try (DirectoryStream<Path> stream = Files.newDirectoryStream(tm2)) {
 280             stream.forEach(p -> {
 281                 results.add(p.getFileName().toString());
 282             });
 283         }
 284         return results;
 285     }
 286
 287     public static interface TileserverStartListener {
 288
 289         void installing(String module);
 290
 291         void installationFailed(String module, int returnValue);
 292
 293         void started();
 294     }
 295 }