Class: Vertx::Promise
- Inherits:
-
Object
- Object
- Vertx::Promise
- Defined in:
- /Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/promise.rb
Overview
Represents the writable side of an action that may, or may not, have occurred yet.
The #future method returns the Future associated with a promise, the future can be used for getting notified of the promise completion and retrieve its value.
A promise extends Handler
so it can be used as a callback.
Direct Known Subclasses
Class Method Summary (collapse)
-
+ (::Vertx::Promise) promise
Create a promise that hasn't completed yet.
Instance Method Summary (collapse)
-
- (void) complete(*args)
Set the result.
-
- (void) fail(*args)
Calls #fail with the message.
-
- (::Vertx::Future) future
The Future associated with this promise, it can be used to be aware of the promise completion.
-
- (true, false) try_complete?(*args)
Like #complete but returns false when the promise is already completed instead of throwing an IllegalStateException, it returns true otherwise.
-
- (true, false) try_fail?(*args)
Calls #fail with the message.
Class Method Details
+ (::Vertx::Promise) promise
Create a promise that hasn't completed yet
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# File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/promise.rb', line 78 def self.promise if !block_given? return ::Vertx::Util::Utils.safe_create(Java::IoVertxCore::Promise.java_method(:promise, []).call(),::Vertx::Promise, nil) end if defined?(super) super else raise ArgumentError, "Invalid arguments when calling promise()" end end |
Instance Method Details
- (void) complete - (void) complete(result)
This method returns an undefined value.
Set the result. Any handler will be called, if there is one, and the promise will be marked as completed. Any handler set on the associated promise will be called.
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# File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/promise.rb', line 113 def complete(*args) if !block_given? && args[0] == nil return @j_del.java_method(:complete, []).call() elsif @j_arg_T.accept?(args[0]) && !block_given? return @j_del.java_method(:complete, [Java::java.lang.Object.java_class]).call(@j_arg_T.unwrap(args[0])) end if defined?(super) super else raise ArgumentError, "Invalid arguments when calling complete(#{args[0]})" end end |
- (void) fail(cause) - (void) fail(message)
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# File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/promise.rb', line 30 def fail(*args) if args[0].is_a?(Exception) && !block_given? return @j_del.java_method(:fail, [Java::JavaLang::Throwable.java_class]).call(::Vertx::Util::Utils.to_throwable(args[0])) elsif args[0].class == String && !block_given? return @j_del.java_method(:fail, [Java::java.lang.String.java_class]).call(args[0]) end if defined?(super) super else raise ArgumentError, "Invalid arguments when calling fail(#{args[0]})" end end |
- (::Vertx::Future) future
Returns the Future associated with this promise, it can be used to be aware of the promise completion
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# File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/promise.rb', line 44 def future if !block_given? if @cached_future != nil return @cached_future end return @cached_future = ::Vertx::Util::Utils.safe_create(@j_del.java_method(:future, []).call(),::Vertx::Future, nil) end if defined?(super) super else raise ArgumentError, "Invalid arguments when calling future()" end end |
- (true, false) tryComplete - (true, false) tryComplete(result)
Like #complete but returns
false
when the promise is already completed instead of throwing
an IllegalStateException, it returns true
otherwise.
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# File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/promise.rb', line 63 def try_complete?(*args) if !block_given? && args[0] == nil return @j_del.java_method(:tryComplete, []).call() elsif @j_arg_T.accept?(args[0]) && !block_given? return @j_del.java_method(:tryComplete, [Java::java.lang.Object.java_class]).call(@j_arg_T.unwrap(args[0])) end if defined?(super) super else raise ArgumentError, "Invalid arguments when calling try_complete?(#{args[0]})" end end |
- (true, false) tryFail(cause) - (true, false) tryFail(message)
Calls #fail with the
message
.
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# File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/promise.rb', line 94 def try_fail?(*args) if args[0].is_a?(Exception) && !block_given? return @j_del.java_method(:tryFail, [Java::JavaLang::Throwable.java_class]).call(::Vertx::Util::Utils.to_throwable(args[0])) elsif args[0].class == String && !block_given? return @j_del.java_method(:tryFail, [Java::java.lang.String.java_class]).call(args[0]) end if defined?(super) super else raise ArgumentError, "Invalid arguments when calling try_fail?(#{args[0]})" end end |