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Groups > comp.lang.java.programmer > #39887
| From | Andreas Leitgeb <avl@logic.at> |
|---|---|
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: Is it possible to send message bursts? |
| Date | 2023-01-02 19:05 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <slrntr6aod.pa7s.avl@logic.at> (permalink) |
| References | <7128506e-015c-4992-8ee4-9c62fb2ccc11n@googlegroups.com> <touu1b$9tp$1@gioia.aioe.org> |
Arne Vajhøj <arne@vajhoej.dk> wrote: > On 1/2/2023 5:10 AM, mike wrote: >> Problem is when I test this is that I want to send message that first >> has some data and then no data giving making read() return -1 and >> then data again. Is it possible to create an inputstream that >> supports this behaviour? I'd think it is possible to create a custom InputStream class that allows reading some bytes, then -1 and lateron some more bytes, if its read() actually gets called again. The problem is, that standard-classes like BufferedReaders, or really any Reader, will just not expect further bytes after first EOF. Those wrappers will just assume that an EOF on the stream is final, and not even attempt any further read. So, if the code (that you want to pass your special stream to) relies on wrappers, it just won't work, but if it directly uses that InputStream and "knows" that -1 isn't final, it might even work - despite being fragile at best, as any software implementing undocumented/contradocumented behaviour. > I don't understand. read() is a blocking method, so if there > is no input it blocks until there is input. It returns -1 > if end of stream is reached (and stream is then invalid and > no point in calling read again). Outside of Java world, if stdin is bound to a terminal, then receiving an EOF and still being able to read more data till next EOF is not quite as bizarre as it might look like to Java'ists ;-)
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Is it possible to send message bursts? mike <mikaelpetterson@hotmail.com> - 2023-01-02 02:10 -0800
Re: Is it possible to send message bursts? Arne Vajhøj <arne@vajhoej.dk> - 2023-01-02 10:42 -0500
Re: Is it possible to send message bursts? Andreas Leitgeb <avl@logic.at> - 2023-01-02 19:05 +0000
Re: Is it possible to send message bursts? Andreas Leitgeb <avl@logic.at> - 2023-01-02 19:13 +0000
Re: Is it possible to send message bursts? Arne Vajhøj <arne@vajhoej.dk> - 2023-01-02 19:27 -0500
Re: Is it possible to send message bursts? "e.d.pro...@gmail.com" <e.d.programmer@gmail.com> - 2023-01-03 04:07 -0800
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