Differential D1822 Diff 6149 java/server/src/main/java/org/softwareheritage/graph/App.java

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java/server/src/main/java/org/softwareheritage/graph/App.java

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import io.javalin.plugin.json.JavalinJackson;		import io.javalin.plugin.json.JavalinJackson;

import org.softwareheritage.graph.Endpoint;		import org.softwareheritage.graph.Endpoint;
import org.softwareheritage.graph.Graph;		import org.softwareheritage.graph.Graph;
import org.softwareheritage.graph.SwhId;		import org.softwareheritage.graph.SwhId;
import org.softwareheritage.graph.algo.Stats;		import org.softwareheritage.graph.algo.Stats;

/**		/**
* Entrypoint of the swh-graph server REST API.		* Web framework of the swh-graph server REST API.
*		*
* @author Thibault Allançon		* @author Thibault Allançon
* @version 0.0.1		* @version 0.0.1
* @since 0.0.1		* @since 0.0.1
*/		*/

public class App {		public class App {
		/**
		* Main entrypoint.
		*
		* @param args command line arguments
		*/
public static void main(String[] args) throws IOException, JSAPException {		public static void main(String[] args) throws IOException, JSAPException {
SimpleJSAP jsap = new SimpleJSAP(		SimpleJSAP jsap = new SimpleJSAP(
App.class.getName(),		App.class.getName(),
"Server to load and query a compressed graph representation of Software Heritage archive.",		"Server to load and query a compressed graph representation of Software Heritage archive.",
new Parameter[] {		new Parameter[] {
new FlaggedOption("port", JSAP.INTEGER_PARSER, "5009", JSAP.NOT_REQUIRED, 'p', "port",		new FlaggedOption("port", JSAP.INTEGER_PARSER, "5009", JSAP.NOT_REQUIRED, 'p', "port",
"Binding port of the server."),		"Binding port of the server."),
new UnflaggedOption("graphPath", JSAP.STRING_PARSER, JSAP.NO_DEFAULT, JSAP.REQUIRED,		new UnflaggedOption("graphPath", JSAP.STRING_PARSER, JSAP.NO_DEFAULT, JSAP.REQUIRED,
JSAP.NOT_GREEDY, "The basename of the compressed graph."),		JSAP.NOT_GREEDY, "The basename of the compressed graph."),
}		}
);		);

JSAPResult config = jsap.parse(args);		JSAPResult config = jsap.parse(args);
if (jsap.messagePrinted()) {		if (jsap.messagePrinted()) {
System.exit(1);		System.exit(1);
}		}

String graphPath = config.getString("graphPath");		String graphPath = config.getString("graphPath");
int port = config.getInt("port");		int port = config.getInt("port");

startServer(graphPath, port);		startServer(graphPath, port);
}		}

		/**
		* Loads compressed graph and starts the web server to query it.
		*
		* @param graphPath basename of the compressed graph
		* @param port binding port of the server
		*/
private static void startServer(String graphPath, int port) throws IOException {		private static void startServer(String graphPath, int port) throws IOException {
Graph graph = new Graph(graphPath);		Graph graph = new Graph(graphPath);
Stats stats = new Stats(graphPath);		Stats stats = new Stats(graphPath);

// Clean up on exit		// Clean up on exit
Runtime.getRuntime().addShutdownHook(new Thread() {		Runtime.getRuntime().addShutdownHook(new Thread() {
public void run() {		public void run() {
try {		try {
▲ Show 20 Lines • Show All 70 Lines • ▼ Show 20 Lines	private static void startServer(String graphPath, int port) throws IOException {
});		});

app.exception(IllegalArgumentException.class, (e, ctx) -> {		app.exception(IllegalArgumentException.class, (e, ctx) -> {
ctx.status(400);		ctx.status(400);
ctx.result(e.getMessage());		ctx.result(e.getMessage());
});		});
}		}

		/**
		* Checks query strings names provided to the REST API.
		*
		* @param ctx Javalin HTTP request context
		* @param allowedFmt a regular expression describing allowed query strings names
		* @throws IllegalArgumentException unknown query string provided
		*/
private static void checkQueryStrings(Context ctx, String allowedFmt) {		private static void checkQueryStrings(Context ctx, String allowedFmt) {
Map<String, List<String>> queryParamMap = ctx.queryParamMap();		Map<String, List<String>> queryParamMap = ctx.queryParamMap();
for (String key : queryParamMap.keySet()) {		for (String key : queryParamMap.keySet()) {
if (!key.matches(allowedFmt)) {		if (!key.matches(allowedFmt)) {
throw new IllegalArgumentException("Unknown query string: " + key);		throw new IllegalArgumentException("Unknown query string: " + key);
}		}
}		}
}		}
}		}