Peter Firmstone wrote: ...
Yes I bumped into this recently when creating a concurrent policy implementation, although it was with Enumeration, the backing set cannot be modified while the Enumeration is being read from a loop, the same with the iterator.
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That depends on the implementation of the Iterator, and the Iterable's related contract. There is nothing prohibiting concurrency-supporting contracts. See, for example, http://download.oracle.com/javase/6/docs/api/java/util/concurrent/ConcurrentLinkedQueue.html#iterator%28%29
I'm planning to make the FastList in outrigger Iterable, and follow the ConcurrentLinkedQueue model. As the results looked in preliminary benchmarking before I went on vacation, the best implementation is based on ConcurrentLinkedQueue.
The issue of remoteness, and allowing remote-related exceptions, is another issue. However, rather than giving up the nice loop syntax we get with Iterable, we could consider wrapping in an unchecked exception.
Patricia
