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Ways to save enums in database
...ther half of this solution is to write some test code that checks that the Java enum and the database enum table have the same contents. That's left as an exercise for the reader.
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How to handle multiple heterogeneous inputs with Logstash?
...used tags for multiple file input:
input {
file {
type => "java"
path => "/usr/aaa/logs/stdout.log"
codec => multiline {
...
},
tags => ["aaa"]
}
file {
type => "java"
path => "/usr/bbb/logs/stdout.lo...
Limit file format when using ?
...like to know if there is a solution. I'd like to keep solely to HTML and JavaScript; no Flash please.
11 Answers
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In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
... explanation in the below link:
http://www.itprogrammingtutorials.com/2015/java/hibernate/hibernate-validator-diff-notblank-notempty/
@NotNull: Checks whether the value is not null, disregarding the content
@NotEmpty: Checks whether the value is not null nor empty. If it has just empty spaces, it ...
Detect URLs in text with JavaScript
... but rather a proof of how to do the string wrapping inside the text, with JavaScript.
OK so lets just use this one: /(https?:\/\/[^\s]+)/g
Again, this is a bad regex. It will have many false positives. However it's good enough for this example.
function urlify(text) {
var urlRegex = /(htt...
What is monkey patching?
... version of your class / method (rather than modifying it). A lot of C# / Java programmers don't know about REPL driven development, so they code in their IDEs that requires that everything be statically defined. Since C#/Java didn't have monkey-patching, they assume its evil when they see it in J...
@UniqueConstraint and @Column(unique = true) in hibernate annotation
...
From the Java EE documentation:
public abstract boolean unique
(Optional) Whether the property is a unique key. This is a shortcut for the
UniqueConstraint annotation at the table level and is useful for when the unique key...
Mocking member variables of a class using Mockito
... @IgorGanapolsky the @ Resource is a annotation created/used by the Java Spring framework. Its a way to indicate to Spring this is a bean/object managed by Spring. stackoverflow.com/questions/4093504/resource-vs-autowired baeldung.com/spring-annotations-resource-inject-autowire It is not a m...
When is a function too long? [closed]
...e standard API isn't always a model of elegance. Furthermore, much of the Java API was developed with an intimate knowledge of the Java Compiler and JVM, hence you have performance considerations that may explain it. I concede that critical sections of code that can not waste a single millisecond ...
How default .equals and .hashCode will work for my classes?
... into an integer, but this implementation technique is not required by the JavaTM programming language.)
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