Java监控MongoDB空间使用量、连接数

最近在做一个Java开发的监控系统，里面有一个模块是监控MongoDB的。看到网络上比较少这块资料，特记录如下： 

1.下载MongoDB的Java驱动包

mongo-java-driver-3.1.1.jar

2.获取空间使用量等数据：

CommandResult stats=db.getStats();

获取到的数据如下：

{ "serverUsed": "172.1.1.3:15080", "db": "monitor", "collections": 27, "objects": 26358, "avgObjSize": 1044.4045830487898, "dataSize": 27528416, "storageSize": 53030912, "numExtents": 73, "indexes": 25, "indexSize": 1062880, "fileSize": 1006632960, "nsSizeMB": 16, "dataFileVersion": {"major": 4,"minor": 5 }, "extentFreeList": {"num": 71,"totalSize": 654319616 }, "ok": 1.0}

3.获取连接数等数据：

CommandResult stats=db.command("serverStatus");

获取到的数据如下：

{ "serverUsed": "172.1.1.3:15080", "host": "docker:80", "version": "2.6.6", "process": "mongod", "pid": 49, "uptime": 687177.0, "uptimeMillis": 687177657, "uptimeEstimate": 679910.0, "localTime": {"$date": "2016-03-08T16:15:46.815Z" }, "asserts": {"regular": 1,"warning": 1,"msg": 0,"user": 58812,"rollovers": 0 }, "backgroundFlushing": {"flushes": 11452,"total_ms": 143088,"average_ms": 12.494586098498079,"last_ms": 78,"last_finished": {"$date": "2016-03-08T16:14:50.610Z"} }, "connections": {"current": 13,"available": 806,"totalCreated": 1794 }, "cursors": {"note": "deprecated, use server status metrics","clientCursors_size": 0,"totalOpen": 0,"pinned": 0,"totalNoTimeout": 38,"timedOut": 3 }, "dur": {"commits": 29,"journaledMB": 0.008192,"writeToDataFilesMB": 0.003634,"compression": 2.0262181548355183,"commitsInWriteLock": 0,"earlyCommits": 0,"timeMs": {"dt": 3009,"prepLogBuffer": 0,"writeToJournal": 40,"writeToDataFiles": 0,"remapPrivateView": 0} }, "extra_info": {"note": "fields vary by platform","heap_usage_bytes": 67277952,"page_faults": 692 }, "globalLock": {"totalTime": 687177659000,"lockTime": 47304462,"currentQueue": {"total": 0,"readers": 0,"writers": 0},"activeClients": {"total": 0,"readers": 0,"writers": 0} }, "indexCounters": {"accesses": 431329,"hits": 431329,"misses": 0,"resets": 0,"missRatio": 0.0 }, "locks": {".": {"timeLockedMicros": { "R": 9599442, "W": 47304462},"timeAcquiringMicros": { "R": 4543336, "W": 1125820}},"admin": {"timeLockedMicros": { "r": 2625360, "w": 0},"timeAcquiringMicros": { "r": 158482, "w": 0}} }, "network": {"bytesIn": 96033519,"bytesOut": 177762851,"numRequests": 878581 }, "opcounters": {"insert": 108167,"query": 262770,"update": 1014,"delete": 6,"getmore": 50,"command": 632623 }, "opcountersRepl": {"insert": 0,"query": 0,"update": 0,"delete": 0,"getmore": 0,"command": 0 }, "recordStats": {"accessesNotInMemory": 2,"pageFaultExceptionsThrown": 1,"admin": {"accessesNotInMemory": 0,"pageFaultExceptionsThrown": 0} }, "writeBacksQueued": false, "mem": {"bits": 64,"resident": 196,"virtual": 4782,"supported": true,"mapped": 2000,"mappedWithJournal": 4000 }, "metrics": {"cursor": {"timedOut": 3,"open": { "noTimeout": 38, "pinned": 0, "total": 0}},"document": {"deleted": 21,"inserted": 78767,"returned": 103245,"updated": 1014},"getLastError": {"wtime": { "num": 0, "totalMillis": 0},"wtimeouts": 0},"operation": {"fastmod": 1,"idhack": 0,"scanAndOrder": 0},"queryExecutor": {"scanned": 0,"scannedObjects": 0},"record": {"moves": 0},"repl": {"apply": { "batches": {"num": 0,"totalMillis": 0 }, "ops": 0},"buffer": { "count": 0, "maxSizeBytes": 268435456, "sizeBytes": 0},"network": { "bytes": 0, "getmores": {"num": 0,"totalMillis": 0 }, "ops": 0, "readersCreated": 0},"preload": { "docs": {"num": 0,"totalMillis": 0 }, "indexes": {"num": 0,"totalMillis": 0 }}},"storage": {"freelist": { "search": {"bucketExhausted": 0,"requests": 130732,"scanned": 231145 }}},"ttl": {"deletedDocuments": 0,"passes": 11452} }, "ok": 1.0}