Examples with Single io.helidon.common.reactive.Single used on opensource projects

Example 11 with Single

use of io.helidon.common.reactive.Single in project helidon by oracle.

the class DbClientTracing method apply.

@Override
protected Single<DbClientServiceContext> apply(DbClientServiceContext serviceContext) {
    SpanTracingConfig spanConfig = TracingConfigUtil.spanConfig("dbclient", "statement");
    if (!spanConfig.enabled()) {
        return Single.just(serviceContext);
    }
    Context context = serviceContext.context();
    Tracer tracer = context.get(Tracer.class).orElseGet(GlobalTracer::get);
    // now if span context is missing, we build a span without a parent
    Tracer.SpanBuilder spanBuilder = tracer.buildSpan(serviceContext.statementName());
    context.get(SpanContext.class).ifPresent(spanBuilder::asChildOf);
    Span span = spanBuilder.start();
    span.setTag("db.operation", serviceContext.statementType().toString());
    if (spanConfig.logEnabled("statement", true)) {
        Tags.DB_STATEMENT.set(span, serviceContext.statement());
    }
    Tags.COMPONENT.set(span, "dbclient");
    Tags.DB_TYPE.set(span, serviceContext.dbType());
    serviceContext.statementFuture().thenAccept(nothing -> {
        if (spanConfig.logEnabled("statement-finish", true)) {
            span.log(Map.of("type", "statement"));
        }
    });
    serviceContext.resultFuture().thenAccept(count -> {
        if (spanConfig.logEnabled("result-finish", true)) {
            span.log(Map.of("type", "result", "count", count));
        }
        span.finish();
    }).exceptionally(throwable -> {
        Tags.ERROR.set(span, Boolean.TRUE);
        span.log(Map.of("event", "error", "error.kind", "Exception", "error.object", throwable, "message", throwable.getMessage()));
        span.finish();
        return null;
    });
    return Single.just(serviceContext);
}

Example 12 with Single

use of io.helidon.common.reactive.Single in project helidon by oracle.

the class Main method startServer.

/**
 * Start the server.
 * @return the created WebServer instance
 */
public static Single<WebServer> startServer() {
    // load logging configuration
    LogConfig.configureRuntime();
    // By default this will pick up application.yaml from the classpath
    Config config = Config.create();
    Single<WebServer> server = WebServer.builder(createRouting(config)).config(config.get("server")).addMediaSupport(JsonpSupport.create()).addMediaSupport(JsonbSupport.create()).build().start();
    server.thenAccept(ws -> {
        System.out.println("WEB server is up! http://localhost:" + ws.port() + "/api/movies");
        ws.whenShutdown().thenRun(() -> System.out.println("WEB server is DOWN. Good bye!"));
    }).exceptionally(t -> {
        System.err.println("Startup failed: " + t.getMessage());
        t.printStackTrace(System.err);
        return null;
    });
    return server;
}

Example 13 with Single

use of io.helidon.common.reactive.Single in project helidon by oracle.

the class Main method startServer.

/**
 * Start the server.
 *
 * @return the created {@link WebServer} instance
 */
static Single<WebServer> startServer(Config config) {
    // load logging configuration
    LogConfig.configureRuntime();
    // Build server using three ports:
    // default public port, admin port, private port
    WebServer server = WebServer.builder(createPublicRouting(config)).config(config.get("server")).addMediaSupport(JsonpSupport.create()).build();
    Single<WebServer> webServerSingle = server.start();
    // Try to start the server. If successful, print some info and arrange to
    // print a message at shutdown. If unsuccessful, print the exception.
    webServerSingle.thenAccept(ws -> {
        System.out.println("WEB server is up! http://localhost:" + ws.port());
        ws.whenShutdown().thenRun(() -> System.out.println("WEB server is DOWN. Good bye!"));
    }).exceptionallyAccept(t -> {
        System.err.println("Startup failed: " + t.getMessage());
        t.printStackTrace(System.err);
    });
    return webServerSingle;
}

Example 14 with Single

use of io.helidon.common.reactive.Single in project helidon by oracle.

the class BulkheadTest method testBulkheadQueue.

@Test
void testBulkheadQueue() throws InterruptedException {
    Bulkhead bulkhead = Bulkhead.builder().limit(1).queueLength(1000).build();
    Request inProgress = new Request(0);
    bulkhead.invoke(inProgress::invoke);
    Request[] aLotRequests = new Request[999];
    Single[] aLotResults = new Single[999];
    for (int i = 0; i < aLotRequests.length; i++) {
        Request req = new Request(i);
        aLotRequests[i] = req;
        aLotResults[i] = bulkhead.invoke(req::invoke);
    }
    for (Request req : aLotRequests) {
        req.releaseCdl.countDown();
    }
    inProgress.releaseCdl.countDown();
    if (inProgress.invokedCdl.await(1, TimeUnit.SECONDS)) {
        for (Single result : aLotResults) {
            result.await(1, TimeUnit.SECONDS);
        }
    } else {
        fail("Should have invoked the first");
    }
}

Example 15 with Single

use of io.helidon.common.reactive.Single in project helidon by oracle.

the class Main method startServer.

/**
 * Start the server.
 * @return the created {@link WebServer} instance
 */
static Single<WebServer> startServer(Config config) {
    // load logging configuration
    LogConfig.configureRuntime();
    // Build server using three ports:
    // default public port, admin port, private port
    WebServer server = WebServer.builder(createPublicRouting()).config(config.get("server")).addNamedRouting("admin", createAdminRouting()).addNamedRouting("private", createPrivateRouting()).build();
    Single<WebServer> webserver = server.start();
    // Try to start the server. If successful, print some info and arrange to
    // print a message at shutdown. If unsuccessful, print the exception.
    webserver.thenAccept(ws -> {
        System.out.println("WEB server is up! http://localhost:" + ws.port());
        ws.whenShutdown().thenRun(() -> System.out.println("WEB server is DOWN. Good bye!"));
    }).exceptionally(t -> {
        System.err.println("Startup failed: " + t.getMessage());
        t.printStackTrace(System.err);
        return null;
    });
    return webserver;
}