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Easy Learn Java: Programming Articles, Examples and Tips - Page 526


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Can we just try without catch? Yes!

Go to all tips in General Java

Try without catch.. ?

Many people believe that if they use try block then they are obligated to continue with catch block, catch some Exception and do something with it

It is not quite right opinion Smile


You can use try block with following final block without catch, like this:

try {
        int i = 10;           
        //....
        // do smth. here
} finally {
        int i = -10
        //....
        // finalize smth here
}

avoiding catch block. Maybe you do need it at all, you simply do not mind about it. It is a fact that many programmers have no code in catch block So, why bother about it all. If you do not have a strategy for error handling do not do it all! Just continue.

Someone still may ask: so why we need try if we do not catch? Is not it simpler to run just plain code without any blocks. Please do not forget that we use try to try something, if it does not go we can continue anyway. Plain code just will stop and cause runtime error, which will break your program flow.


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Posted by jalex on Monday, February 11, 2008 (21:06:09) (15694 reads)

Make Tomcat page load faster

Go to all tips in Java Installation, tunning, options...

Improve page loading time on Tomcat server.

If you use Tomcat server to serve remote clients over the Internet you can significantly improve page loading time by enabling content compression. A content become compressed when it transports over the Internet. All modern browsers support HTTP/1.1 GZIP compression and if your server also enables it, the page load time decreases dramatically. They just popping out in a browser, like if they were served from a local server.

Enable compression In Tomcat for certain file types


Enable compression by adding compression="on" or compression="force". Please notice that MIME type of content type to be compressed is defined in compressableMimeType variable. Those variables are optional for Tomcat Connector and are defined in server.xml file. This file is the part of Tomcat configuration files and situated in conf directory under Tomcat home directory.

Two more useful parameters are, example:

compressionMinSize="2048"
noCompressionUserAgents="gozilla, traviata"

Skip compression for small files in Tomcat

Compression minimal size is good to skip compressing too small files - the compression overhead will take away all benefits and can result in even bigger file Smile

Look at the next example below:

<Connector port="8443" maxHttpHeaderSize="8192"
maxThreads="150" minSpareThreads="5" maxSpareThreads="25"
enableLookups="false" disableUploadTimeout="true"
acceptCount="100" scheme="https" secure="true"
clientAuth="false" sslProtocol="TLS"

compression="on"
compressionMinSize="2048"
noCompressionUserAgents="gozilla, traviata"
compressableMimeType="text/html,text/xml" />


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Posted by jalex on Sunday, February 10, 2008 (21:44:27) (9722 reads)

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