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From "Valery Silaev (JIRA)" <>
Subject [jira] Created: (SANDBOX-323) Support for ASM 3.2 / 3.3 and in/out continuations parameters
Date Tue, 15 Jun 2010 08:25:23 GMT
Support for ASM 3.2 / 3.3 and in/out continuations parameters

                 Key: SANDBOX-323
             Project: Commons Sandbox
          Issue Type: Improvement
          Components: Javaflow
    Affects Versions: Nightly Builds
         Environment: SUN JDK 1.6
            Reporter: Valery Silaev
             Fix For: Nightly Builds

1. Currently JavaFlow can be used with new ASM builds due to incompatible changes introduced
in ASM 3.2, the patch provided adds support for ASM 3.2 / 3.3, so JavaFlow may be used with
any ASM 3.x version 

2. There is no API to return result from suspended continuation, ad-hoc custom logic with
ThreadLocal variables is necessary for this. The patch contains API changes to allow this.

// In continuation
final Object varReceivedByContinuation = Continuation.suspend(varPassedByContinuation);

// In calling client
final Continuation cc = Continuation.startWith(code);
System.out.println(cc.value()); // value() is yielded by continuation

In certain sense this works as "yield" operator found in other programming languages, and
has even richer semantics.

3. Miscellaneous: continuation-specific Iterable/Iterator are provided with patch as well
to simplify iteration over multiple values yielded by continuation code; they are named CoRoutine
/ CoIterator in code.

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