I have a class called Root which serves as some kind of phonebook for dynamic method calls: it holds a dictionary of url keys pointing to objects. When a command wants to execute a given method it cal
Say I have the following table: ID|Read ------- 1|true 2|false 3|false 4|false ... and I need to read the smallest ID, that has [Read] == false; plus, update that I have now read it.
I\'m looking at 开发者_开发百科the static method Collections.synchronizedList(List<T> list)
In my doPost method of the servlet I need to access a file (shared resource ) and update the file . How do I cater to some 100 users usin开发者_如何学编程g this at the same time ?
I\'ve got a C++ project which uses automake and autoconf. I\'m new to both of these. My home directory is network mounted -- the same on every server we have -- and I want to compile and run the proj
As it currently stands, this question is not a good fit for our 开发者_开发问答Q&A format. We expect answers to be supported by facts, references,or expertise, but this question will likely so
Consider the following shell script: gzip -dc in.gz | sed -e \'s/@/_at_/g\' | gzip -c > out.gz This has three processes working in parallel to decompress a stream, modify it, and re-compress it
Is there a good, platform-agnostic way to implement a variable that\'s local to both a thread and a class instance, i.e. if you have T threads and I class instances, you have TxI instances of that var
Here\'s an idea I just came up with for a safe, efficient way of handling Singleton synchronization issues.It\'s basically double-checked locking, but with a twist that involves thread-local storage.I
Related: Does java have a "LinkedConcurrentHashMap" data structure? I am looking for a collection class to hold references to event listeners.
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