[SANDBOX-323] Support for ASM 3.2 / 3.3 and in/out continuations parameters

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Nightly Builds
• Fix Version/s: Nightly Builds
• Component/s: Javaflow

Environment

SUN JDK 1.6

• Assignee: Torsten Curdt
• Reporter: Valery Silaev
• Created: 15/Jun/10 08:23
• Updated: 26/Jun/10 17:17
• Resolved: 26/Jun/10 17:17

Description

1. Currently JavaFlow can't 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 necessary API improvements.

// 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.