Awesome Open Source
Awesome Open Source

MgntUtils

Mgnt Utilities This utility package provides some convenience Utilities That provide some manipulations with several data types. It introduces a new type "Version" as well as "VersionRange" and provides tools for version comparison, conversion from and to String as well as work with Version ranges.

The Javadoc API could be found here:

MgntUtils javadoc API

Probably the most interesting and useful feature is stacktrace extractor that allows to extract full or shortened version of stacktrace. In particular it is very useful in J2EE environment. Exceptions on the server side usually come with HUGE tail of application server related packages. That makes logs very verbose and hard to read and search. TextUtils provides various getStacktrace methods that may drastically reduce such stacktraces in a very smart way so all the important information is preserved. It sifts through "caused by" and "suppressed" parts of the stacktrace as well. Also the same utility (starting from version 1.5.0.3) allows to filter and shorten stacktrace as a string the same way as the stacktrace extracted from exception. So, essentially stacktraces could be filtered "on the fly" at run time or later on from any text source such as log.

Other features include parsing String into most of the implementations of Number interface without having to catch NullPointerException of NumberFormatException. The methods take String value to parse, default value in case of failure and messages (optional) that will be printed into log if some error occurred.

Another useful feature is parsing String to time interval. It parses Strings with numerical value and optional time unit suffix (for example string "38s" will be parsed as 38 seconds, "24m" - 24 minutes "4h" - 4 hours, "3d" - 3 days and "45" as 45 milliseconds.) This method may be very useful for parsing time interval properties such as timeouts or waiting periods from configuration files.

Also there is a feature that converts String to preserve indentation formatting for html without use of escape characters. It converts a String in such a way that its spaces are not modified by HTML renderer i.e. it replaces regular space characters with non-breaking spaces known as '&nbsp;' but they look in your source as regular space ' ' and not as '&nbsp;' It also replaces new line character with '<br>'.

Another feature is some small infrastructure that simplifies and automates working with Factories that provide concrete implementations of an Interface. The package contains just 2 classes: BaseEntityFactory and BaseEntity. In short what this infrastructure does is that if you create a factory that extends BaseEntityFactory and some Interface with all its concrete implementations extending BaseEntity then each your concrete implementation class instances will be automatically inserted into your factory. You won't have to worry about how and when to populate your factory. The infrastructure will do it for you when the constructor of your concrete implementation class is invoked. So all you will have to do is to create any number of concrete implementation classes and make sure that for each one constructor is invoked. After that you can use your factory to get any of your concrete implementation classes anywhere in your code.

An infrastructure that can run user implemented Task classes in a separate thread at configured time interval. The interval could be parsed from String in human readable format such as "9h" for 9 hours. This is based on use of the parsing String to time interval feature mentioned above

Class HttpClient provides a base class for implementations that can open HTTP connections to spesific URLs, but also can be used on its own for sending HTTP requests.

Also class StringUnicodeEncoderDecoder converts String into sequence of unicodes and vise-versa.

Finally WebUtils class provides a method for chunked reading of HttpRequest content. This could be useful when receiving large files from client on the server side and the reading speed of the server is faster then writing speed of the client. The utility allows for auto throttle to adjust to the client.

This library is available on Maven Central. Here are the artifacts:

<dependency>
  <groupId>com.github.michaelgantman</groupId>
  <artifactId>MgntUtils</artifactId>
  <version>1.5.1.2</version>
</dependency>

<dependency>
  <groupId>com.github.michaelgantman</groupId>
  <artifactId>MgntUtils</artifactId>
  <version>1.5.1.2</version>
  <classifier>javadoc</classifier>
</dependency>

<dependency>
  <groupId>com.github.michaelgantman</groupId>
  <artifactId>MgntUtils</artifactId>
  <version>1.5.1.2</version>
  <classifier>sources</classifier>
</dependency>

If have any feedback feel free to drop me a note at [email protected]


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