- handle // @Override // blah style comments
- deal with fields that are assigned to anonymous inner classes (actually
anything with braces, which would also include array literals).
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(ByteArray is a special class for dealing with bytes. It does not extend
the normal Array).
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an arbitrary Java class which we are converting to ActionScript (the language,
not the class). Hopefully this will appease the compiler.
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aren't magically in scope for ActionScript, we have to generate import
statements for them.
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when we encounter the pattern "new SomeClass[0]". Le whee!
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field/method names for the ActionScript version of a class (or to omit
something entirely). This removes the need for special case hackery for
toStringBuilder().
In order for annotations to work, however, we have to require that the
GenActionScriptTask be loaded from the same classloader that loads the classes
to be reflected upon. Before we only reflected on the target classes, never
instantiated them. Annotations are actually instantiated, so we have to be able
to create an instance of the ActionScript.class that is compiled into our
target classes and assign it to a reference that is compiled into
GenActionScriptTask. Beware the complexities of dealing with multiple class
loaders.
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because we can't do that in ActionScript; properly handle static var and
non-static const.
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interfaces, and Marshallers for same. The remaining snag has to do with the
annoyance of ActionScript not supporting inner classes, which means that
ChatService.TellListener for example has to become ChatService_TellListener.
The code for generating the Java marshaller knows to add an import for
ChatService if some random invocation service interface happens to reference
ChatService.TellListener, but now it needs to be made to know to add an import
for ChatService_TellListener in ActionScript land and it has to do it in a way
that doesn't fuck up the Java code generation. Whee!
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Java. Of course this is a very limited translation facility that is mainly
focused on auto-generating Streamable ActionScript classes from their Java
originals, and it doesn't actually convert method bodies, just field and method
declarations, initial values, and such.
Most of our Streamable classes don't have much in the way of real methods, and
the autogenerator will stick new methods in when they show up on the Java side
so at least we'll *know* that they need to be implemented. And the main thing:
readObject and writeObject are in fact implemented by the code generator so at
least we won't be plagued by annoying streaming errors when we change something
on the Java side and forget to change the ActionScript side.
Next up, auto-generating InvocationService interfaces and InvocationMarshaller
implementations in ActionScript and ActionScript versions of DObjects.
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unmarshalled into an ArrayList on the receiver. Along the way, I improved
support for generic types as arguments to invocation services (which required
one unfortunate "sweeping" warning suppression, but since this is in generated
code, I think we can be sure it won't be doing anything untoward).
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required some serious bending and folding of the generic type system, but for
the most part we managed to avoid any mutilating. The gendobj task now
generates properly typed "addToXXX" and "updateXXX" DSet methods based on the
parameterized type of the DSet. This might cause unrecompiled code to break,
but I don't think there are many cases in the base toolkit where people call
DSet adders or updaters. We'll see and I'll add backwards compatibility
versions for cases where we need them to support GG games (everything else we
can just recompile).
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parameterized types will be easy to add, but I've not yet had occasion to use
them. We're all about "just in time" support.
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These are the preferred way to get instances of Boolean, Byte,
Short, Character, Integer, Long, Float, and Double object.
It's always made sense for Boolean objects, and with 1.5 these factory
methods were blessed as the proper way to get instances unless one
absolutely needed a distinct object.
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genericize Narya data structures, nor make the existing code type safe. That's
going to be an extremely large project.
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previously redone the InvocationService and DObject generation tools but not
the InvocationReceiver tool.
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Have invocation marshallers track whether someone ever ended up responding
to the client: if they get garbage collected without ever doing so
(and they're not the base class InvocationMarshaller, which can only report
errors), log an informative error message.
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not be generated. Cleaned up the generated provider interface formatting a bit.
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and FooDispatcher. This means we will no longer be able to make FooProvider a
class that directly handles FooService methods, but the savings in confusion
for first time users of the framework will more than make up for the minor
inconvenience.
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objects (DSet, arrays) in a DEvent (which should not change as a result of
other events being applied) and those in the object itself (which do
change and evolve as events are applied to the object).
This is important both because the DEvent is passed on to another thread
for delivery to remote clients, thus changes to the values in the event
could take place before they were serialized and sent over the network,
and because compound events are applied to an object before they are sent
to the other thread for delivery and thus, for example, setting a DSet and
then adding a few entries to it in a compound event would result in the
DEvent copy of the DSet becoming corrupted.
Two problems remain (note, neither of these are new, the one issue
introduced when I rewrote the DObject stuff is fixed by these checkins):
1. Object subscription requests are supposed to deliver a snapshot of the
object at the point in the event stream at which the subscription
request was processed, but presently we pass only a reference to the
object off to the networking thread which means that before the object
is serialized and sent to clients, subsequent events could be applied
to it and then those events would be sent to the client as well
resulting in funny business (probably nothing more than duplicate DSet
entry warnings, but imagination and Chapter 17 tell us that worse
things could happen).
2. The use of Streamable instances could result in badness. If a field in
a Streamable is modified and the whole Streamable set() back into the
object to broadcast the update, then further changes were made to the
Streamable before the attribute change event was serialized and sent
over the network, the second modifications would be reflected in the
event triggered by the first modifications.
The first problem may be solvable (albeit inefficiently) by serializing
the DObject on the event dispatcher thread and sending that serialized
copy off to the network thread for delivery to the client. It would be
much less efficient as we would be unable to make use of the client's
already "primed" ObjectOutputStream which may have already mapped many of
the classes in the object to two byte codes, but object subscription is
fairly uncommon compared to delivery of events, so inefficiency might not
be a big problem in this case.
The second problem might be solved by requiring that all Streamable
implementations implement clone() and then cloning any Streamable
attribute just as we do an array or DSet during an attribute, array
element or DSet entry change. This would be a more significant performance
hit as well as require a review of all of our Streamable classes (to
determine if they need a custom clone() implementation), and it has up to
now not actually manifested as a problem.
In any case I'm not going to tackle either of these remedies at the moment
because I'm on vacation, dammit.
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accomplish our "previous value" support in the distributed object system
without using reflection and could also avoid using reflection in the case
where we have already applied the event on the server (which is generally
the case on the server).
Rather than hacking up the gendobj script, I took this opportunity also to
rewrite the DObject generation script as an Ant task and in doing so,
implemented another recent idea which is that we can just augment the
FooObject.java file instead of having a separate .dobj and .java file.
You'd think it was spring there's so much cleaning going on.
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Narya. I added directives to the compile line to prevent that from
happening again.
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Michael Bayne