Example usage for java.lang.management BufferPoolMXBean getCount

Introduction

In this page you can find the example usage for java.lang.management BufferPoolMXBean getCount.

Prototype

long getCount();

Source Link

Document

Returns an estimate of the number of buffers in the pool.

Usage

From source file:net.centro.rtb.monitoringcenter.metrics.system.jvm.BufferPoolMetricSet.java

BufferPoolMetricSet() {
    this.bufferPoolMXBeans = ManagementFactory.getPlatformMXBeans(BufferPoolMXBean.class);

    List<BufferPoolStatus> bufferPoolStatuses = new ArrayList<>();
    Map<String, Metric> metricsByNames = new HashMap<>();

    for (final BufferPoolMXBean bufferPoolMXBean : bufferPoolMXBeans) {
        final String bufferPoolName = bufferPoolMXBean.getName();

        final Gauge<Long> sizeGauge = new Gauge<Long>() {
            @Override//from  w w  w.  j  a  va 2s  . c  o m
            public Long getValue() {
                return bufferPoolMXBean.getCount();
            }
        };
        metricsByNames.put(MetricNamingUtil.join(bufferPoolName, "size"), sizeGauge);

        final Gauge<Long> totalCapacityInBytesGauge = new Gauge<Long>() {
            @Override
            public Long getValue() {
                return bufferPoolMXBean.getTotalCapacity();
            }
        };
        metricsByNames.put(MetricNamingUtil.join(bufferPoolName, "totalCapacityInBytes"),
                totalCapacityInBytesGauge);

        final Gauge<Long> usedMemoryInBytesGauge;
        if (bufferPoolMXBean.getMemoryUsed() >= 0) {
            usedMemoryInBytesGauge = new Gauge<Long>() {
                @Override
                public Long getValue() {
                    return bufferPoolMXBean.getMemoryUsed();
                }
            };
            metricsByNames.put(MetricNamingUtil.join(bufferPoolName, "usedMemoryInBytes"),
                    usedMemoryInBytesGauge);
        } else {
            usedMemoryInBytesGauge = null;
        }

        bufferPoolStatuses.add(new BufferPoolStatus() {
            @Override
            public String getName() {
                return bufferPoolName;
            }

            @Override
            public Gauge<Long> getSizeGauge() {
                return sizeGauge;
            }

            @Override
            public Gauge<Long> getTotalCapacityInBytesGauge() {
                return totalCapacityInBytesGauge;
            }

            @Override
            public Gauge<Long> getUsedMemoryInBytesGauge() {
                return usedMemoryInBytesGauge;
            }
        });
    }

    this.bufferPoolStatuses = bufferPoolStatuses;
    this.metricsByNames = metricsByNames;
}

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From source file:org.apache.flink.runtime.metrics.util.MetricUtils.java

private static void instantiateMemoryMetrics(MetricGroup metrics) {
    final MemoryMXBean mxBean = ManagementFactory.getMemoryMXBean();
    MetricGroup heap = metrics.addGroup("Heap");
    heap.gauge("Used", new Gauge<Long>() {
        @Override/*w  w w .j av  a  2  s.c  o  m*/
        public Long getValue() {
            return mxBean.getHeapMemoryUsage().getUsed();
        }
    });
    heap.gauge("Committed", new Gauge<Long>() {
        @Override
        public Long getValue() {
            return mxBean.getHeapMemoryUsage().getCommitted();
        }
    });
    heap.gauge("Max", new Gauge<Long>() {
        @Override
        public Long getValue() {
            return mxBean.getHeapMemoryUsage().getMax();
        }
    });

    MetricGroup nonHeap = metrics.addGroup("NonHeap");
    nonHeap.gauge("Used", new Gauge<Long>() {
        @Override
        public Long getValue() {
            return mxBean.getNonHeapMemoryUsage().getUsed();
        }
    });
    nonHeap.gauge("Committed", new Gauge<Long>() {
        @Override
        public Long getValue() {
            return mxBean.getNonHeapMemoryUsage().getCommitted();
        }
    });
    nonHeap.gauge("Max", new Gauge<Long>() {
        @Override
        public Long getValue() {
            return mxBean.getNonHeapMemoryUsage().getMax();
        }
    });

    List<BufferPoolMXBean> bufferMxBeans = ManagementFactory.getPlatformMXBeans(BufferPoolMXBean.class);

    for (final BufferPoolMXBean bufferMxBean : bufferMxBeans) {
        MetricGroup bufferGroup = metrics.addGroup(WordUtils.capitalize(bufferMxBean.getName()));
        bufferGroup.gauge("Count", new Gauge<Long>() {
            @Override
            public Long getValue() {
                return bufferMxBean.getCount();
            }
        });
        bufferGroup.gauge("MemoryUsed", new Gauge<Long>() {
            @Override
            public Long getValue() {
                return bufferMxBean.getMemoryUsed();
            }
        });
        bufferGroup.gauge("TotalCapacity", new Gauge<Long>() {
            @Override
            public Long getValue() {
                return bufferMxBean.getTotalCapacity();
            }
        });
    }
}

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