o != arg0 is the same as !(o == (arg0)).
o != arg0 is the same as !(o == (arg0)).
the object to compare against this object for dis-equality.
false if the receiver object is equivalent to the argument; true otherwise.
o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).
o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).
the object to compare against this object for equality.
true if the receiver object is equivalent to the argument; false otherwise.
o == arg0 is the same as o.equals(arg0).
o == arg0 is the same as o.equals(arg0).
the object to compare against this object for equality.
true if the receiver object is equivalent to the argument; false otherwise.
This method is used to cast the receiver object to be of type T0.
This method is used to cast the receiver object to be of type T0.
Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expressionList(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as
part of compilation it is not possible to check whether the contents of the list are of the requested typed.
the receiver object.
This method creates and returns a copy of the receiver object.
This method creates and returns a copy of the receiver object.
The default implementation of the clone method is platform dependent.
a copy of the receiver object.
A Future[Unit] indicating when the Channel closed.
A Future[Unit] indicating when the Channel closed. New observers can no longer be added (calls to respond become no-ops), and no more messages will be delivered.
The typical Scala collect method: a combination of map and filter.
The typical Scala collect method: a combination of map and filter.
This method is used to test whether the argument (arg0) is a reference to the
receiver object (this).
This method is used to test whether the argument (arg0) is a reference to the
receiver object (this).
The eq method implements an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation] on
non-null instances of AnyRef:
* It is reflexive: for any non-null instance x of type AnyRef, x.eq(x) returns true.
* It is symmetric: for any non-null instances x and y of type AnyRef, x.eq(y) returns true if and
only if y.eq(x) returns true.
* It is transitive: for any non-null instances x, y, and z of type AnyRef if x.eq(y) returns true and y.eq(z) returns true, then x.eq(z) returns true.
Additionally, the eq method has three other properties.
* It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of
x.eq(y) consistently returns true or consistently returns false.
* For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false.
* null.eq(null) returns true.
When overriding the equals or hashCode methods, it is important to ensure that their behavior is
consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they
should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).
the object to compare against this object for reference equality.
true if the argument is a reference to the receiver object; false otherwise.
This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.
This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.
The default implementations of this method is an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence
relation]:
* It is reflexive: for any instance x of type Any, x.equals(x) should return true.
* It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and
only if y.equals(x) returns true.
* It is transitive: for any instances x, y, and z of type AnyRef if x.equals(y) returns true and
y.equals(z) returns true, then x.equals(z) should return true.
If you override this method, you should verify that your implementation remains an equivalence relation.
Additionally, when overriding this method it is often necessary to override hashCode to ensure that objects
that are "equal" (o1.equals(o2) returns true) hash to the same
scala.Int
(o1.hashCode.equals(o2.hashCode)).
the object to compare against this object for equality.
true if the receiver object is equivalent to the argument; false otherwise.
Produce a new channel, eliminating elements where the predicate obtains.
Produce a new channel, eliminating elements where the predicate obtains.
This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.
This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.
The details of when and if the finalize method are invoked, as well as the interaction between finalizeand non-local returns and exceptions, are all platform dependent.
Get a future for the first message to arrive on this Channel, from this point on.
Get a future for the first message to arrive on this Channel, from this point on.
Returns a representation that corresponds to the dynamic class of the receiver object.
Returns a representation that corresponds to the dynamic class of the receiver object.
The nature of the representation is platform dependent.
a representation that corresponds to the dynamic class of the receiver object.
Returns a hash code value for the object.
Returns a hash code value for the object.
The default hashing algorithm is platform dependent.
Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)) yet
not be equal (o1.equals(o2) returns false). A degenerate implementation could always return 0.
However, it is required that if two objects are equal (o1.equals(o2) returns true) that they have
identical hash codes (o1.hashCode.equals(o2.hashCode)). Therefore, when overriding this method, be sure
to verify that the behavior is consistent with the equals method.
the hash code value for the object.
This method is used to test whether the dynamic type of the receiver object is T0.
This method is used to test whether the dynamic type of the receiver object is T0.
Note that the test result of the test is modulo Scala's erasure semantics. Therefore the expression1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will
return true. In the latter example, because the type argument is erased as part of compilation it is not
possible to check whether the contents of the list are of the requested typed.
true if the receiver object is an instance of erasure of type T0; false otherwise.
Indicates whether the Channel is open.
Indicates whether the Channel is open.
Produce a new channel with the function applied to all messages in this channel.
Produce a new channel with the function applied to all messages in this channel.
Combine two Channels together to produce a new Channel with messages interleaved.
Combine two Channels together to produce a new Channel with messages interleaved.
o.ne(arg0) is the same as !(o.eq(arg0)).
o.ne(arg0) is the same as !(o.eq(arg0)).
the object to compare against this object for reference dis-equality.
false if the argument is not a reference to the receiver object; true otherwise.
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
Pipe the output of this channel to another Channel.
Pipe the output of this channel to another Channel. If either Channel closes midway through, stop operations.
Subscribe to messages on this channel.
Subscribe to messages on this channel. If the channel is closed, this method still returns an Observer. This is a trade-off to avoid excessive lock-contention. Listen for close events if this affects your use case.
Note: all subclasses of Channel *must* ensure ordered, single-threaded delivery of messages. This means that the callback param k should NEVER be invoked by two threads at once.
Furthermore, respond() must publish all operations to shared variables to any Threads that will later invoke param k. Thus, any shared variables accessed only from within k needn't be synchronized or annotated volatile.
Note: hard references may be kept to callbacks added to a channel It is the callers responsibility to dispose() of the Observer to prevent memory leaks.
A function returning Future[Unit] indicating that the message has been fully processed.
an observer object representing the subscription.
Ensures that events happen in order, one thread at a time.
Ensures that events happen in order, one thread at a time. This prevents interleaving of message delivery (respond) and lifecycle (close) events.
Furthermore, it can be used to atomically perform several operations to a Channel at once, without the side-effects of those operations being triggered until the whole "batch" of operations complete. For example, this can be used to attach several observers at once without the possibility of one of the observers being invoked before the others were attached. If two or more observers share mutable state, this would be used to eliminate race-conditions leading to data-integrity woes.
Returns a string representation of the object.
Returns a string representation of the object.
The default representation is platform dependent.
a string representation of the object.
A Channel is a unidirectional, read-only communication object. It represents a stream of messages that can be subscribed to. There are any number of subscribers and thus it is also pub-sub hub.
Channel[+A] is a trait. The most common concrete implementation is a ChannelSource. A ChannelSource is both readable and writeable. A typical use case is for a producer to construct a ChannelSource and give it to a consumer, upcasted to a Channel. This is analogous to the Future/Promise relationship.