com.netflix.hystrix.HystrixRequestLog Java Examples

@Test
public void test() {
    HystrixRequestContext context = HystrixRequestContext.initializeContext();
    try {
        assertEquals(null, new CommandWithFallbackViaNetwork(1).execute());

        HystrixInvokableInfo<?> command1 = HystrixRequestLog.getCurrentRequest().getAllExecutedCommands().toArray(new HystrixInvokableInfo<?>[2])[0];
        assertEquals("GetValueCommand", command1.getCommandKey().name());
        assertTrue(command1.getExecutionEvents().contains(HystrixEventType.FAILURE));

        HystrixInvokableInfo<?> command2 = HystrixRequestLog.getCurrentRequest().getAllExecutedCommands().toArray(new HystrixInvokableInfo<?>[2])[1];
        assertEquals("GetValueFallbackCommand", command2.getCommandKey().name());
        assertTrue(command2.getExecutionEvents().contains(HystrixEventType.FAILURE));
    } finally {
        context.shutdown();
    }
}
 

private static void commandWithFallbackViaNetworkTest() {
    HystrixRequestContext context = HystrixRequestContext.initializeContext();
    try {
         log.info(new CommandWithFallbackViaNetwork(1).execute());

        HystrixInvokableInfo<?> command1 = HystrixRequestLog.getCurrentRequest().getAllExecutedCommands().toArray(new HystrixInvokableInfo<?>[2])[0];
        log.info(command1.getCommandKey().name());
        log.info(""+command1.getExecutionEvents().contains(HystrixEventType.FAILURE));

        HystrixInvokableInfo<?> command2 = HystrixRequestLog.getCurrentRequest().getAllExecutedCommands().toArray(new HystrixInvokableInfo<?>[2])[1];
        log.info(command2.getCommandKey().name());
        log.info(""+command2.getExecutionEvents().contains(HystrixEventType.FAILURE));
    } finally {
        context.shutdown();
    }
}
 

/**
 * Logs details like full exception stack trace for failed Hystrix commands.
 * A command might not have been executed (say threadpool/semaphore rejected,
 * short circuited). Command might have been executed but failed (say timed out,
 * command execution failed).
 *
 * This is required as Phantom's RequestLogger logs failures of sync command
 * executions alone (and not async command executions) and doesn't provide request
 * level view of all commands.
 *
 * We log global headers here as it typically contains request id
 */
private void logFailedHystrixCommands(ServletRequest request) {
    String url = ((HttpServletRequest) request).getPathInfo();
    Map<String, String> globalHeaders = RequestContext.get(HEADERS);

    HystrixRequestLog.getCurrentRequest().getAllExecutedCommands().stream().filter(
            command -> command.isResponseTimedOut() || command.isFailedExecution() || command.isResponseShortCircuited() || command.isResponseRejected()
    ).forEach(
            command -> logger.error("URL: {}. Global headers: {}. Command: {}. Events: {}. Exception: {}",
                    url, globalHeaders, command.getCommandKey().name(), command.getExecutionEvents(),
                    command.getFailedExecutionException() == null ? "" : command.getFailedExecutionException().getMessage())
    );
}
 

private void logFailedHystrixCommands(AsyncConsumerRequest request) {
    String url = request.getUrl();
    Map<String, String> globalHeaders = RequestContext.get(HEADERS);

    HystrixRequestLog.getCurrentRequest().getAllExecutedCommands().stream().filter(
            command -> command.isResponseTimedOut() || command.isFailedExecution() || command.isResponseShortCircuited() || command.isResponseRejected()
    ).forEach(
            command -> logger.error("URL: {}. Global headers: {}. Command: {}. Events: {}. Exception: {}",
                    url, globalHeaders, command.getCommandKey().name(), command.getExecutionEvents(),
                    command.getFailedExecutionException() == null ? "" : command.getFailedExecutionException().getMessage())
    );
}
 

public static void main(String... args) {
    // initialize
    DiscoveryAndLoadBalancer.getFactory();
    // hystrix stream => http://localhost:9999
    startHystrixMetricsStream();

    System.out.println("Server => Starting at http://localhost:8080/");
    System.out.println("   Sample URLs: ");
    System.out.println("      - http://localhost:8080/device/home?userId=123");
    System.out.println("----------------------------------------------------------------");

    // start web services => http://localhost:8080
    RxNetty.createHttpServer(8080, (request, response) -> {
        if (request.getPath().contains("favicon.ico")) {
            return Observable.empty();
        }
        // System.out.println("Server => Request: " + request.getPath());
        return Observable.defer(() -> {
            HystrixRequestContext.initializeContext();
            try {
                return handleRoutes(request, response);
            } catch (Throwable e) {
                System.err.println("Server => Error [" + request.getPath() + "] => " + e);
                response.setStatus(HttpResponseStatus.BAD_REQUEST);
                return response.writeStringAndFlush("Error 500: Bad Request\n" + e.getMessage() + "\n");
            }
        }).onErrorResumeNext(error -> {
            System.err.println("Server => Error: " + error.getMessage());
            error.printStackTrace();
            return writeError(request, response, "Failed: " + error.getMessage());
        }).doOnTerminate(() -> {
            if (HystrixRequestContext.isCurrentThreadInitialized()) {
                System.out.println("Server => Request [" + request.getPath() + "] => " + HystrixRequestLog.getCurrentRequest().getExecutedCommandsAsString());
                HystrixRequestContext.getContextForCurrentThread().shutdown();
            } else {
                System.err.println("HystrixRequestContext not initialized for thread: " + Thread.currentThread());
            }
            response.close();
        });
    }).startAndWait();
}