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author | Ivan Topolnjak <ivantopo@gmail.com> | 2017-08-14 17:30:16 +0200 |
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committer | Ivan Topolnjak <ivantopo@gmail.com> | 2017-08-14 17:30:16 +0200 |
commit | 3a8c0fa25f12230b27e943d1fffe07f814c650fe (patch) | |
tree | 75a12128af7387f40e3eba040812e1bd87b9a455 /kamon-core/src/main/scala/kamon/context/Context.scala | |
parent | a6113cf33ba1b98cc73d35176ccf8a2f76b77875 (diff) | |
download | Kamon-3a8c0fa25f12230b27e943d1fffe07f814c650fe.tar.gz Kamon-3a8c0fa25f12230b27e943d1fffe07f814c650fe.tar.bz2 Kamon-3a8c0fa25f12230b27e943d1fffe07f814c650fe.zip |
implement Span propagation on top of Kamon.Context
Diffstat (limited to 'kamon-core/src/main/scala/kamon/context/Context.scala')
-rw-r--r-- | kamon-core/src/main/scala/kamon/context/Context.scala | 127 |
1 files changed, 15 insertions, 112 deletions
diff --git a/kamon-core/src/main/scala/kamon/context/Context.scala b/kamon-core/src/main/scala/kamon/context/Context.scala index f7c78388..f8a4662f 100644 --- a/kamon-core/src/main/scala/kamon/context/Context.scala +++ b/kamon-core/src/main/scala/kamon/context/Context.scala @@ -1,18 +1,27 @@ package kamon.context -class Context private (private val keys: Map[Key[_], Any]) { +class Context private (private[context] val entries: Map[Key[_], Any]) { def get[T](key: Key[T]): T = - keys.get(key).getOrElse(key.emptyValue).asInstanceOf[T] + entries.get(key).getOrElse(key.emptyValue).asInstanceOf[T] def withKey[T](key: Key[T], value: T): Context = - new Context(keys.updated(key, value)) + new Context(entries.updated(key, value)) } object Context { val Empty = new Context(Map.empty) - def apply(): Context = Empty - def create(): Context = Empty + def apply(): Context = + Empty + + def create(): Context = + Empty + + def apply[T](key: Key[T], value: T): Context = + new Context(Map(key -> value)) + + def create[T](key: Key[T], value: T): Context = + apply(key, value) } @@ -38,110 +47,4 @@ object Key { override def equals(that: Any): Boolean = that.isInstanceOf[Default[_]] && that.asInstanceOf[Default[_]].name == this.name } -} - -trait Storage { - def current(): Context - def store(context: Context): Scope - - trait Scope { - def context: Context - def close(): Unit - } -} - -object Storage { - - class ThreadLocal extends Storage { - private val tls = new java.lang.ThreadLocal[Context]() { - override def initialValue(): Context = Context.Empty - } - - override def current(): Context = - tls.get() - - override def store(context: Context): Scope = { - val newContext = context - val previousContext = tls.get() - tls.set(newContext) - - new Scope { - override def context: Context = newContext - override def close(): Unit = tls.set(previousContext) - } - } - } -} - -trait KeyCodec[T] { - def encode(context: Context): T - def decode(carrier: T, context: Context): Context -} - -/* -object Example { - // this is defined somewhere statically, only once. - val User = Key.local[Option[User]]("user", None) - val Client = Key.local[Option[User]]("client", null) - val Span = Key.broadcast[Span]("span", EmptySpan) - val storage = Kamon.contextStorage // or something similar. - - storage.get(Span) // returns a Span instance or EmptySpan. - storage.get(User) // Returns Option[User] or None if not set. - storage.get(Client) // Returns Option[Client] or null if not set. - - // Context Propagation works the very same way as before. - - val scope = storage.store(context) - // do something here - scope.close() - - // Configuration for codecs would be handled sort of like this: - - // kamon.context.propagation { - // http-header-codecs { - // "span" = kamon.trace.propagation.B3 - // } - // - // binary-codecs { - // "span" = kamon.trace.propagation.Binary - // } - // } - - - - - -}*/ - - - -/* - - - - - -class Context(private val keys: Map[Key[_], Any]) { - - - - - -} - -object Context { - - -} - -sealed trait Key[T] { - def name: String -} - -object Key { - - def local[T](name: String): Key[T] = Local(name) - - case class Local[T](name: String) extends Key[T] -}*/ +}
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