René's URL Explorer Experiment

  {
    "@context": "https://schema.org",
    "@graph": [
      {
        "@type": "Organization",
        "@id": "https://lastping.dev/#org",
        "name": "LastPing",
        "url": "https://lastping.dev/",
        "logo": "https://lastping.dev/icon-512.png",
        "email": "hello@lastping.dev",
        "sameAs": ["https://github.com/lastping-dev/lastping-app"]
      },
      {
        "@type": "WebSite",
        "@id": "https://lastping.dev/#website",
        "url": "https://lastping.dev/",
        "name": "LastPing",
        "publisher": { "@id": "https://lastping.dev/#org" }
      },
      {
        "@type": "TechArticle",
        "@id": "https://lastping.dev/monitor/java/",
        "url": "https://lastping.dev/monitor/java/",
        "headline": "Monitor Java scheduled jobs: Spring @Scheduled and Spring Batch",
        "description": "How to monitor a Java scheduled job: Spring @Scheduled with try/catch pings LastPing on success and POSTs to /fail on exception; Spring Batch uses a JobExecutionListener to check BatchStatus and ping accordingly.",
        "author": { "@id": "https://lastping.dev/#org" },
        "publisher": { "@id": "https://lastping.dev/#org" },
        "isPartOf": { "@id": "https://lastping.dev/#website" },
        "datePublished": "2026-07-24",
        "dateModified": "2026-07-24"
      },
      {
        "@type": "BreadcrumbList",
        "@id": "https://lastping.dev/monitor/java/#breadcrumb",
        "itemListElement": [
          { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://lastping.dev/" },
          { "@type": "ListItem", "position": 2, "name": "Monitoring guides", "item": "https://lastping.dev/monitor/" },
          { "@type": "ListItem", "position": 3, "name": "Monitor Java scheduled jobs", "item": "https://lastping.dev/monitor/java/" }
        ]
      },
      {
        "@type": "FAQPage",
        "@id": "https://lastping.dev/monitor/java/#faq",
        "mainEntity": [
          {
            "@type": "Question",
            "name": "How do I monitor a Spring @Scheduled job?",
            "acceptedAnswer": {
              "@type": "Answer",
              "text": "Wrap the method body in try/catch: on success, call restTemplate.getForObject on the ping URL; on exception, POST the message to the /fail endpoint and re-throw so Spring can apply its own error handling."
            }
          },
          {
            "@type": "Question",
            "name": "How do I monitor a Spring Batch job?",
            "acceptedAnswer": {
              "@type": "Answer",
              "text": "Implement JobExecutionListener and in afterJob() check jobExecution.getStatus(). If BatchStatus.COMPLETED, GET the ping URL. Otherwise collect the failure exceptions, join them, and POST the text to /fail."
            }
          },
          {
            "@type": "Question",
            "name": "Do I need a dependency like OkHttp or Apache HttpClient?",
            "acceptedAnswer": {
              "@type": "Answer",
              "text": "No. java.net.http.HttpClient (Java 11+) handles both GET and POST without additional dependencies. RestTemplate or WebClient from Spring are convenient wrappers but not required."
            }
          },
          {
            "@type": "Question",
            "name": "What if Spring's scheduler swallows the exception?",
            "acceptedAnswer": {
              "@type": "Answer",
              "text": "Spring's default TaskUtils.LOG_AND_SUPPRESS_ERROR_HANDLER logs the exception but suppresses it so the scheduler keeps running. The /fail ping still fires because it is sent inside the catch block before re-throwing. Configure a custom TaskScheduler error handler if you need further propagation."
            }
          },
          {
            "@type": "Question",
            "name": "How do I monitor a Quartz job in Java?",
            "acceptedAnswer": {
              "@type": "Answer",
              "text": "Implement a JobListener and add ping calls in jobWasExecuted: check jobExecutionException for null to distinguish success from failure. The ping URL is the same; only the hook mechanism differs."
            }
          },
          {
            "@type": "Question",
            "name": "What if the JVM is OOM-killed?",
            "acceptedAnswer": {
              "@type": "Answer",
              "text": "An OOM-killed JVM sends no ping; the missing ping opens an incident after the grace window. This is the core value of absence-detection monitoring for JVM workloads."
            }
          },
          {
            "@type": "Question",
            "name": "Is Java job monitoring free?",
            "acceptedAnswer": {
              "@type": "Answer",
              "text": "Yes. LastPing is free for individuals with no monitor cap. See how it compares to Healthchecks.io and Cronitor."
            }
          }
        ]
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      {
        "@type": "HowTo",
        "@id": "https://lastping.dev/monitor/java/#howto",
        "name": "How to monitor a Java Spring scheduled job with LastPing",
        "step": [
          { "@type": "HowToStep", "position": 1, "name": "Create a monitor", "text": "Log in to app.lastping.dev, create a heartbeat monitor, set the schedule to match the @Scheduled cron expression, and set a grace window." },
          { "@type": "HowToStep", "position": 2, "name": "Store the ping URL", "text": "Add lastping.ping-url=https://ping.lastping.dev/ to application.properties and inject it with @Value." },
          { "@type": "HowToStep", "position": 3, "name": "Add try/catch or JobExecutionListener", "text": "For @Scheduled: wrap the body in try/catch, GET on success, POST to /fail on exception, re-throw. For Spring Batch: add a JobExecutionListener bean that checks BatchStatus." },
          { "@type": "HowToStep", "position": 4, "name": "Configure alert channels", "text": "In the LastPing console add email, Slack, Discord, Telegram, ntfy, Pushover, Microsoft Teams, Google Chat or webhook destinations." }
        ]
      }
    ]
  }