| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.griffin.measure.utils |
| |
| import java.util.concurrent.TimeUnit |
| |
| import org.apache.griffin.measure.Loggable |
| |
| object CommonUtils extends Loggable { |
| |
| /** |
| * Executes a given code block and logs the time taken for its execution. |
| * |
| * @param f Arbitrary code block |
| * @param timeUnit required for time conversion to desired unit. Default: [[TimeUnit.SECONDS]] |
| * @tparam T resultant type parameter |
| * @return result of type T |
| */ |
| def timeThis[T](f: => T, timeUnit: TimeUnit = TimeUnit.SECONDS): T = { |
| val startNanos = System.nanoTime() |
| val result = f |
| val endNanos = System.nanoTime() |
| |
| griffinLogger.info(s"Time taken: ${timeUnit |
| .convert(endNanos - startNanos, TimeUnit.NANOSECONDS)} ${timeUnit.name().toLowerCase}") |
| |
| result |
| } |
| |
| /** |
| * |
| * @param t `Traversable` |
| * @param op operation |
| * @tparam T1 any type |
| * @return instance of `T1` |
| */ |
| def safeReduce[T1](t: Iterable[T1])(op: (T1, T1) => T1): T1 = { |
| val head :: tail = t.toList |
| tail.fold(head)(op) |
| } |
| |
| } |