BlockContext

A context to be notified by scala.concurrent.blocking when a thread is about to block. In effect this trait provides the implementation for scala.concurrent.Await. scala.concurrent.Await.result() and scala.concurrent.Await.ready() locates an instance of BlockContext by first looking for one provided through BlockContext.withBlockContext() and failing that, checking whether Thread.currentThread is an instance of BlockContext. So a thread pool can have its java.lang.Thread instances implement BlockContext. There's a default BlockContext used if the thread doesn't implement BlockContext.

Typically, you'll want to chain to the previous BlockContext, like this:

val oldContext = BlockContext.current
val myContext = new BlockContext {
  override def blockOn[T](thunk: =>T)(implicit permission: CanAwait): T = {
    // you'd have code here doing whatever you need to do
    // when the thread is about to block.
    // Then you'd chain to the previous context:
    oldContext.blockOn(thunk)
  }
}
BlockContext.withBlockContext(myContext) {
  // then this block runs with myContext as the handler
  // for scala.concurrent.blocking
}

Source: BlockContext.scala

Linear Supertypes

AnyRef, Any

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Abstract Value Members

abstract def blockOn[T](thunk: ⇒ T)(implicit permission: CanAwait): T

Used internally by the framework; Designates (and eventually executes) a thunk which potentially blocks the calling Thread.
Used internally by the framework; Designates (and eventually executes) a thunk which potentially blocks the calling Thread.
Clients must use scala.concurrent.blocking or scala.concurrent.Await instead.

Concrete Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
def +(other: String): String

Implicit information
This member is added by an implicit conversion from BlockContext to any2stringadd[BlockContext] performed by method any2stringadd in scala.Predef.
Definition Classes
any2stringadd
def ->[B](y: B): (BlockContext, B)

Implicit information
This member is added by an implicit conversion from BlockContext to ArrowAssoc[BlockContext] performed by method ArrowAssoc in scala.Predef.
Definition Classes
ArrowAssoc
Annotations
@inline()
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
def ensuring(cond: (BlockContext) ⇒ Boolean, msg: ⇒ Any): BlockContext

Implicit information
This member is added by an implicit conversion from BlockContext to Ensuring[BlockContext] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: (BlockContext) ⇒ Boolean): BlockContext

Implicit information
This member is added by an implicit conversion from BlockContext to Ensuring[BlockContext] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: Boolean, msg: ⇒ Any): BlockContext

Implicit information
This member is added by an implicit conversion from BlockContext to Ensuring[BlockContext] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: Boolean): BlockContext

Implicit information
This member is added by an implicit conversion from BlockContext to Ensuring[BlockContext] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
def formatted(fmtstr: String): String

Returns string formatted according to given format string.
Returns string formatted according to given format string. Format strings are as for String.format (@see java.lang.String.format).

Implicit information
This member is added by an implicit conversion from BlockContext to StringFormat[BlockContext] performed by method StringFormat in scala.Predef.
Definition Classes
StringFormat
Annotations
@inline()
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
def →[B](y: B): (BlockContext, B)

Implicit information
This member is added by an implicit conversion from BlockContext to ArrowAssoc[BlockContext] performed by method ArrowAssoc in scala.Predef.
Definition Classes
ArrowAssoc

trait BlockContext extends AnyRef

Abstract Value Members

abstract def blockOn[T](thunk: ⇒ T)(implicit permission: CanAwait): T

Concrete Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

def +(other: String): String

def ->[B](y: B): (BlockContext, B)

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

def ensuring(cond: (BlockContext) ⇒ Boolean, msg: ⇒ Any): BlockContext

def ensuring(cond: (BlockContext) ⇒ Boolean): BlockContext

def ensuring(cond: Boolean, msg: ⇒ Any): BlockContext

def ensuring(cond: Boolean): BlockContext

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

def formatted(fmtstr: String): String

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

def →[B](y: B): (BlockContext, B)

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from BlockContext to any2stringadd[BlockContext]

Inherited by implicit conversion StringFormat from BlockContext to StringFormat[BlockContext]

Inherited by implicit conversion Ensuring from BlockContext to Ensuring[BlockContext]

Inherited by implicit conversion ArrowAssoc from BlockContext to ArrowAssoc[BlockContext]

Ungrouped