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author | Ivan Topolnjak <ivantopo@gmail.com> | 2017-04-24 13:54:40 +0200 |
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committer | Ivan Topolnjak <ivantopo@gmail.com> | 2017-04-24 13:54:40 +0200 |
commit | 4d828e1a3195e55365c865aa3a78af9668742643 (patch) | |
tree | 07fff2683933c96297a8ba577bbdc89888da16e1 /kamon-core/src/legacy-main/scala/kamon/metric/instrument/Counter.scala | |
parent | 469c11dc1ddb140f407a33f48033e533bf60611c (diff) | |
download | Kamon-4d828e1a3195e55365c865aa3a78af9668742643.tar.gz Kamon-4d828e1a3195e55365c865aa3a78af9668742643.tar.bz2 Kamon-4d828e1a3195e55365c865aa3a78af9668742643.zip |
Prepare for the major cleanup
Moved all the original files from src/main to src/legacy-main, same with test files. Also
removed the autoweave module, examples and bench as I'm planning to have them in separate
repositories.
Diffstat (limited to 'kamon-core/src/legacy-main/scala/kamon/metric/instrument/Counter.scala')
-rw-r--r-- | kamon-core/src/legacy-main/scala/kamon/metric/instrument/Counter.scala | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/kamon-core/src/legacy-main/scala/kamon/metric/instrument/Counter.scala b/kamon-core/src/legacy-main/scala/kamon/metric/instrument/Counter.scala new file mode 100644 index 00000000..b7ab60de --- /dev/null +++ b/kamon-core/src/legacy-main/scala/kamon/metric/instrument/Counter.scala @@ -0,0 +1,65 @@ +/* + * ========================================================================================= + * 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. + * ========================================================================================= + */ + +package kamon.metric.instrument + +import kamon.jsr166.LongAdder + +trait Counter extends Instrument { + type SnapshotType = Counter.Snapshot + + def increment(): Unit + def increment(times: Long): Unit +} + +object Counter { + + def apply(): Counter = new LongAdderCounter + def create(): Counter = apply() + + trait Snapshot extends InstrumentSnapshot { + def count: Long + def merge(that: InstrumentSnapshot, context: CollectionContext): Counter.Snapshot + def scale(from: UnitOfMeasurement, to: UnitOfMeasurement): Counter.Snapshot + } +} + +class LongAdderCounter extends Counter { + private val counter = new LongAdder + + def increment(): Unit = counter.increment() + + def increment(times: Long): Unit = { + if (times < 0) + throw new UnsupportedOperationException("Counters cannot be decremented") + counter.add(times) + } + + def collect(context: CollectionContext): Counter.Snapshot = CounterSnapshot(counter.sumAndReset()) + + def cleanup: Unit = {} +} + +case class CounterSnapshot(count: Long) extends Counter.Snapshot { + def merge(that: InstrumentSnapshot, context: CollectionContext): Counter.Snapshot = that match { + case CounterSnapshot(thatCount) ⇒ CounterSnapshot(count + thatCount) + case other ⇒ sys.error(s"Cannot merge a CounterSnapshot with the incompatible [${other.getClass.getName}] type.") + } + + override def scale(from: UnitOfMeasurement, to: UnitOfMeasurement): Counter.Snapshot = + CounterSnapshot(from.tryScale(to)(count).toLong) + +}
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