JVM Status missing?

[phaus]

Is there a reason why the default Matrics are not present?
Like from here https://github.com/dropwizard/metrics/tree/master/metrics-jvm/src/main/java/com/codahale/metrics/jvm ?

Within Dropwizard Applications, i am getting something like this:

{
    "jvm": {
        "vm": {
            "name": "JavaHotSpot(TM)64-BitServerVM",
            "version": "1.8.0_40-b25"
        },
        "memory": {
            "totalInit": 270991360,
            "totalUsed": 86478064,
            "totalMax": 3817865215,
            "totalCommitted": 168427520,
            "heapInit": 268435456,
            "heapUsed": 50204640,
            "heapMax": 3817865216,
            "heapCommitted": 131072000,
            "heap_usage": 0.01314992467245863,
            "non_heap_usage": -36273424,
            "memory_pool_usages": {
                "CodeCache": 0.042722320556640624,
                "CompressedClassSpace": 0.0026135221123695374,
                "Metaspace": 0.9681979557655377,
                "PSEdenSpace": 0.029426374601005494,
                "PSOldGen": 0.0027989848809816687,
                "PSSurvivorSpace": 0.08125
            }
        },
        "buffers": {
            "direct": {
                "count": 4,
                "memoryUsed": 77824,
                "totalCapacity": 77824
            },
            "mapped": {
                "count": 0,
                "memoryUsed": 0,
                "totalCapacity": 0
            }
        },
        "daemon_thread_count": 9,
        "thread_count": 26,
        "current_time": 1428581292747,
        "uptime": 105,
        "fd_usage": 0.00361328125,
        "thread-states": {
            "waiting": 0.2692307692307692,
            "blocked": 0,
            "runnable": 0.2692307692307692,
            "terminated": 0,
            "new": 0,
            "timed_waiting": 0.46153846153846156
        },
        "garbage-collectors": {
            "PSMarkSweep": {
                "runs": 1,
                "time": 21
            },
            "PSScavenge": {
                "runs": 20,
                "time": 50
            }
        }
    },
    ...
}

That is missing in the current output. Also the encapsulation within a "metrics" key is somehow specific to the Plugin. I am trying to setup a global Monitoring for Play and Dropwizard Applications. So having a Matching Metrics Layout would be nice. Just curious about the reason for doing it different here.

[liorhar]

I think you're referring to dropwizard 0.6.x which had metrics 2.x. The format has changed in dropwizard 0.7.x as well.
It's something like this in the latest dropwizard releases:

{
version: "3.0.0",
gauges: {
jvm.buffers.direct.capacity: {
value: 1095110
},
jvm.buffers.direct.count: {
value: 171
},
jvm.buffers.direct.used: {
value: 1095110
},
jvm.buffers.mapped.capacity: {
value: 0
},
jvm.buffers.mapped.count: {
value: 0
}

But you're right this plugin doesn't add the jvm.memory/buffers/threads prefixes to the gauges as dropwizard does, I agree it would be nice, though it means breaking changes for everyone using these metrics

[phaus]

though it means breaking changes for everyone using these metrics

can't we just add these metrics in parrallel to the metrics { } object? That won't break anything.
I will have a look into the latest dropwizard version. If you like i will offer you a pull request then.