本文整理汇总了Scala中com.google.common.hash.Hashing类的典型用法代码示例。如果您正苦于以下问题：Scala Hashing类的具体用法？Scala Hashing怎么用？Scala Hashing使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了Hashing类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Scala代码示例。
示例1: MurmurHash3Benchmark
//设置package包名称以及导入依赖的类
package bloomfilter.hashing
import java.nio.ByteBuffer
import sandbox.hashing.{YonikMurmurHash3, CassandraMurmurHash, AlgebirdMurmurHash128}
import sandbox.hashing.YonikMurmurHash3.LongPair
import com.yahoo.sketches.hash.{MurmurHash3 => yMurmurHash3}
import com.google.common.hash.Hashing
import org.openjdk.jmh.annotations.{Benchmark, Scope, State}
import scala.util.hashing.{MurmurHash3 => ScalaMurmurHash3}
import com.clearspring.analytics.hash.{MurmurHash => StreamLibMurmurHash}
@State(Scope.Benchmark)
class MurmurHash3Benchmark {
val key = Range(0, 64).map(_.toByte).toArray
@Benchmark
def javaVersion() = {
YonikMurmurHash3.murmurhash3_x64_128(key, 0, key.length, 0, new LongPair)
}
@Benchmark
def scalaVersion() = {
MurmurHash3Generic.murmurhash3_x64_128(key, 0, key.length, 0)
}
val guavaMurmur = Hashing.murmur3_128()
@Benchmark
def guavaVersion() = {
guavaMurmur.hashBytes(key, 0, key.length)
}
@Benchmark
def cassandraVersion() = {
CassandraMurmurHash.hash3_x64_128(ByteBuffer.wrap(key), 0, key.length, 0)
}
val algebirdMurmur = AlgebirdMurmurHash128(0)
@Benchmark
def algebirdVersion() = {
algebirdMurmur.apply(key)
}
@Benchmark
def yahooVersion() = {
yMurmurHash3.hash(key, 0)
}
@Benchmark
def scalaStdlibVersion() = {
ScalaMurmurHash3.arrayHash(key, 0)
}
@Benchmark
def streamLibVersion() = {
StreamLibMurmurHash.hash(key)
}
} 示例2: read
//设置package包名称以及导入依赖的类
package services
import java.nio.charset.StandardCharsets
import javax.inject.Inject
import com.google.common.hash.Hashing
import com.google.inject.ImplementedBy
import daos.LinkDao
import models.Link
@ImplementedBy(classOf[LinkServiceImpl])
trait LinkService {
def read(shortUrl: String): Option[Link]
def read(id: Long): Option[Link]
def incrementViews(link: Link): Link
def save(link: Link): Link
def simplify(link: Link): Link
def checkOrSimplify(link: Link): Link
}
class LinkServiceImpl @Inject()(linkDao: LinkDao) extends LinkService {
def read(shortUrl: String): Option[Link] =
Option.apply(linkDao.read(shortUrl))
def read(id: Long): Option[Link] =
Option.apply(linkDao.read(id))
def incrementViews(link: Link): Link = {
val updatedLink = Link(link.id, link.url, link.shortUrl, link.views + 1)
linkDao.update(updatedLink)
}
def save(link: Link): Link = {
val simplified: Link = if (link.shortUrl == null) simplify(link) else checkOrSimplify(link)
val linkFromDb: Option[Link] = read(simplified.shortUrl)
if (linkFromDb.nonEmpty) linkFromDb.get
else linkDao.save(simplified)
}
def simplify(link: Link): Link = {
require(link.url != null)
val builder = new StringBuilder
builder append Hashing.murmur3_32().hashString(link.url, StandardCharsets.UTF_8).toString
Link(link.id, link.url, builder.toString, link.views)
}
def checkOrSimplify(link: Link): Link = {
if (linkDao.read(link.shortUrl) != null) simplify(link)
else link
}
}