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Logstash实践: 分布式系统的日志监控 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...配置多个输出实现数据的多份复制，也可以输出到Email，File，Tcp，或者作为其它程序的输入，又或者安装插件实现和其他系统的对接，比如搜索引擎Elasticsearch。
总结：Logstash概念简单，通过组合可以满足多种需求。
3. Logstash的...
How do you find all subclasses of a given class in Java?
... packages you know your class would not be extended or just open the class file and check for finding the class name in the class' constant section avoiding letting the reflection scanner read a lot more information on classes that do not even contain the required reference to your (direct) super cl...
How can I make a horizontal ListView in Android? [duplicate]
...
I cannot find the sourcecode for generating jar file. The link to github had some changes: "Started new github project at github.com/dinocore1/Android-Horizontal-ListView" can anyone point me the sourcecode or tha jar file itself?
– Duna
...
Why can't I see the “Report Data” window when creating reports?
... The shortcut CTRL + ALT + D does work, but you need to have a RDLC file opened in design mode. Don't ask me why :)
– diegosasw
Feb 23 '16 at 0:49
...
What are the disadvantages to declaring Scala case classes?
.... Any subclass of a trait with this modifier must be declared in the same file. When pattern-matching against instances of the trait, the compiler can then warn you if you haven't checked for all possible concrete subclasses. When combined with case classes this can offer you a very high level le...
Is there a performance difference between i++ and ++i in C?
... f()
{
int i;
for (i = 0; i < 100; i++)
g(i);
}
The files are the same, except for ++i and i++:
$ diff i++.c ++i.c
6c6
< for (i = 0; i < 100; i++)
---
> for (i = 0; i < 100; ++i)
We'll compile them, and also get the generated assembler:
$ gcc -c i++.c +...
Why is it slower to iterate over a small string than a small list?
...CONST 1 (<code object <listcomp> at 0x7f4d06b118a0, file "", line 4>)
#>>> 3 LOAD_CONST 2 ('list_iterate.<locals>.<listcomp>')
#>>> 6 MAKE_FUNCTION 0
#>>> 9 LOAD_CONST ...
asynchronous vs non-blocking
...ing calls, one would set all channels (SocketChannel, ServerSocketChannel, FileChannel, etc) as such by calling AbstractSelectableChannel.configureBlocking(false).
After those IO calls return, however, you will likely still need to control the checks such as if and when to read/write again, etc.
For...
doGet and doPost in Servlets
...e3). You only need multipart/form-data whenever you have a <input type="file"> element in the form to upload files which may be non-character data (binary data). This is not the case in your case, so just remove it and it will work as expected. If you ever need to upload files, then you'll hav...
MySQL indexes - what are the best practices?
...ws of a table.
For simplicity's sake, imagine a table is just a big CSV file. Whenever a row is inserted, it's inserted at the end. So the "natural" ordering of the table is just the order in which rows were inserted.
Imagine you've got that CSV file loaded up in a very rudimentary spreadsheet...