diff options
Diffstat (limited to 'kamon-core/src/main/scala/kamon')
-rw-r--r-- | kamon-core/src/main/scala/kamon/metrics/instruments/counter/MinMaxCounter.scala | 57 | ||||
-rw-r--r-- | kamon-core/src/main/scala/kamon/util/PaddedAtomicLong.scala | 24 |
2 files changed, 81 insertions, 0 deletions
diff --git a/kamon-core/src/main/scala/kamon/metrics/instruments/counter/MinMaxCounter.scala b/kamon-core/src/main/scala/kamon/metrics/instruments/counter/MinMaxCounter.scala new file mode 100644 index 00000000..052c7bcd --- /dev/null +++ b/kamon-core/src/main/scala/kamon/metrics/instruments/counter/MinMaxCounter.scala @@ -0,0 +1,57 @@ +package kamon.metrics.instruments.counter +/* + * ========================================================================================= + * Copyright © 2013-2014 the kamon project <http://kamon.io/> + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software distributed under the + * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, + * either express or implied. See the License for the specific language governing permissions + * and limitations under the License. + * ========================================================================================= + */ + +import java.lang.Math._ +import jsr166e.LongMaxUpdater +import kamon.util.PaddedAtomicLong + +sealed trait Counter { + def increment(value: Long = 1L): Unit + def decrement(value: Long = 1L): Unit + def collect(): (Long, Long, Long) +} + +class MinMaxCounter extends Counter { + private val min = new LongMaxUpdater + private val max = new LongMaxUpdater + private val sum = new PaddedAtomicLong + + min.update(0L) + max.update(0L) + + def increment(value: Long = 1L): Unit = { + val currentValue = sum.addAndGet(value) + max.update(currentValue) + } + + def decrement(value: Long = 1L): Unit = { + val currentValue = sum.addAndGet(-value) + min.update(-currentValue) + } + + def collect(): (Long, Long, Long) = { + val currentValue = sum.get() + val result = (abs(min.max()), max.max(), currentValue) + max.update(currentValue) + min.update(-currentValue) + result + } +} + +object MinMaxCounter { + def apply(): Counter = new MinMaxCounter() +} diff --git a/kamon-core/src/main/scala/kamon/util/PaddedAtomicLong.scala b/kamon-core/src/main/scala/kamon/util/PaddedAtomicLong.scala new file mode 100644 index 00000000..9c926372 --- /dev/null +++ b/kamon-core/src/main/scala/kamon/util/PaddedAtomicLong.scala @@ -0,0 +1,24 @@ +package kamon.util +/* + * ========================================================================================= + * Copyright © 2013-2014 the kamon project <http://kamon.io/> + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software distributed under the + * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, + * either express or implied. See the License for the specific language governing permissions + * and limitations under the License. + * ========================================================================================= + */ + +import java.util.concurrent.atomic.AtomicLong + +class PaddedAtomicLong(value: Long = 0) extends AtomicLong(value) { + @volatile var p1, p2, p3, p4, p5, p6 = 7L + + protected def sumPaddingToPreventOptimisation() = p1 + p2 + p3 + p4 + p5 + p6 +}
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