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package org.opentripplanner.standalone;
import com.beust.jcommander.JCommander;
import com.beust.jcommander.ParameterException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.MissingNode;
import org.opentripplanner.common.MavenVersion;
import org.opentripplanner.graph_builder.GraphBuilder;
import org.opentripplanner.routing.graph.Graph;
import org.opentripplanner.routing.impl.DefaultStreetVertexIndexFactory;
import org.opentripplanner.routing.impl.GraphScanner;
import org.opentripplanner.routing.impl.InputStreamGraphSource;
import org.opentripplanner.routing.impl.MemoryGraphSource;
import org.opentripplanner.routing.services.GraphService;
import org.opentripplanner.scripting.impl.BSFOTPScript;
import org.opentripplanner.scripting.impl.OTPScript;
import org.opentripplanner.visualizer.GraphVisualizer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
/**
* This is the main entry point to OpenTripPlanner. It allows both building graphs and starting up an OTP server
* depending on command line options. OTPMain is a concrete class making it possible to construct one with custom
* CommandLineParameters and use its graph builder construction method from web services or scripts, not just from the
* static main function below.
*
* TODO still it seems fairly natural for all of these methods to be static.
*/
public class OTPMain {
private static final Logger LOG = LoggerFactory.getLogger(OTPMain.class);
private final CommandLineParameters params;
public OTPServer otpServer = null;
public GraphService graphService = null;
/** ENTRY POINT: This is the main method that is called when running otp.jar from the command line. */
public static void main(String[] args) {
/* Parse and validate command line parameters. */
CommandLineParameters params = new CommandLineParameters();
try {
JCommander jc = new JCommander(params, args);
if (params.version) {
System.out.println(MavenVersion.VERSION.getLongVersionString());
System.exit(0);
}
if (params.help) {
System.out.println(MavenVersion.VERSION.getShortVersionString());
jc.setProgramName("java -Xmx[several]G -jar otp.jar");
jc.usage();
System.exit(0);
}
params.infer();
} catch (ParameterException pex) {
System.out.println(MavenVersion.VERSION.getShortVersionString());
LOG.error("Parameter error: {}", pex.getMessage());
System.exit(1);
}
if (params.build == null && !params.visualize && !params.server && params.scriptFile == null) {
LOG.info("Nothing to do. Use --help to see available tasks.");
System.exit(-1);
}
OTPMain main = new OTPMain(params);
if (!main.run()) {
System.exit(-1);
}
}
/* Constructor. */
public OTPMain(CommandLineParameters params) {
this.params = params;
}
/**
* Making OTPMain a concrete class and placing this logic an instance method instead of embedding it in the static
* main method makes it possible to build graphs from web services or scripts, not just from the command line.
*
* @return
* true - if the OTPServer starts successfully. If "Run an OTP API server" has been requested, this method will return when the web server shuts down;
* false - if an error occurs while loading the graph;
*/
public boolean run() {
// TODO do params.infer() here to ensure coherency?
/* Create the top-level objects that represent the OTP server. */
makeGraphService();
otpServer = new OTPServer(params, graphService);
/* Start graph builder if requested */
if (params.build != null) {
GraphBuilder graphBuilder = GraphBuilder.forDirectory(params, params.build); // TODO multiple directories
if (graphBuilder != null) {
graphBuilder.run();
/* If requested, hand off the graph to the server as the default graph using an in-memory GraphSource. */
if (params.inMemory || params.preFlight) {
Graph graph = graphBuilder.getGraph();
graph.index(new DefaultStreetVertexIndexFactory());
// FIXME set true router IDs
graphService.registerGraph("", new MemoryGraphSource("", graph));
}
} else {
LOG.error("An error occurred while building the graph.");
return false;
}
}
/* Scan for graphs to load from disk if requested */
// FIXME eventually router IDs will be present even when just building a graph.
if ((params.routerIds != null && params.routerIds.size() > 0) || params.autoScan) {
/* Auto-register pre-existing graph on disk, with optional auto-scan. */
GraphScanner graphScanner = new GraphScanner(graphService, params.graphDirectory, params.autoScan);
graphScanner.basePath = params.graphDirectory;
if (params.routerIds != null && params.routerIds.size() > 0) {
graphScanner.defaultRouterId = params.routerIds.get(0);
}
graphScanner.autoRegister = params.routerIds;
graphScanner.startup();
}
/* Start visualizer if requested */
if (params.visualize) {
Router defaultRouter = graphService.getRouter();
defaultRouter.graphVisualizer = new GraphVisualizer(defaultRouter);
defaultRouter.graphVisualizer.run();
defaultRouter.timeouts = new double[] {60}; // avoid timeouts due to search animation
}
/* Start script if requested */
if (params.scriptFile != null) {
try {
OTPScript otpScript = new BSFOTPScript(otpServer, params.scriptFile);
if (otpScript != null) {
Object retval = otpScript.run();
if (retval != null) {
LOG.warn("Your script returned something, no idea what to do with it: {}", retval);
}
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/* Start web server if requested */
if (params.server) {
GrizzlyServer grizzlyServer = new GrizzlyServer(params, otpServer);
while (true) { // Loop to restart server on uncaught fatal exceptions.
try {
grizzlyServer.run();
return true;
} catch (Throwable throwable) {
LOG.error("An uncaught {} occurred inside OTP. Restarting server.",
throwable.getClass().getSimpleName(), throwable);
}
}
}
return true;
}
/**
* Create a cached GraphService that will be used by all OTP components to resolve router IDs to Graphs.
* If a graph is supplied (graph parameter is not null) then that graph is also registered.
* TODO move into OTPServer and/or GraphService itself, eliminate FileFactory and put basePath in GraphService
*/
public void makeGraphService () {
graphService = new GraphService(params.autoReload);
InputStreamGraphSource.FileFactory graphSourceFactory =
new InputStreamGraphSource.FileFactory(params.graphDirectory);
graphService.graphSourceFactory = graphSourceFactory;
if (params.graphDirectory != null) {
graphSourceFactory.basePath = params.graphDirectory;
}
}
/**
* Open and parse the JSON file at the given path into a Jackson JSON tree. Comments and unquoted keys are allowed.
* Returns null if the file does not exist,
* Returns null if the file contains syntax errors or cannot be parsed for some other reason.
*
* We do not require any JSON config files to be present because that would get in the way of the simplest
* rapid deployment workflow. Therefore we return an empty JSON node when the file is missing, causing us to fall
* back on all the default values as if there was a JSON file present with no fields defined.
*/
public static JsonNode loadJson (File file) {
try (FileInputStream jsonStream = new FileInputStream(file)) {
ObjectMapper mapper = new ObjectMapper();
mapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
JsonNode config = mapper.readTree(jsonStream);
LOG.info("Found and loaded JSON configuration file '{}'", file);
return config;
} catch (FileNotFoundException ex) {
LOG.info("File '{}' is not present. Using default configuration.", file);
return MissingNode.getInstance();
} catch (Exception ex) {
LOG.error("Error while parsing JSON config file '{}': {}", file, ex.getMessage());
System.exit(42); // probably "should" be done with an exception
return null;
}
}
}
