Skip to main content

Create Thread Pool in JAVA is Easy now

By using ExecutorService we can create a pool of threads and run in parallel. This feature has introduced in JAVA5.

see the below links.
ExecutorService
ThreadPoolExecutor

here is an example:

ExecutorService exec = Executors.newFixedThreadPool(10);
for (int i=0;i<100;i++) {
exec.execute(new DoSomething(data));
}

in this example we have created a pool of threads contains 10. Here new DoSomething(data) will be executed 10times parallel.

this can be used, where we need to call Web services since we cannot create webservice connection pool.

Labels

Labels:

Comments

Post a Comment

Popular posts from this blog

Running and debugging jetty maven plugin in Netbeans

Coding with Netbeans will make developer life simple. We don't need search for plugins and install different plugins from different places. Maven projects can opened as directly in Netbeans without any settings. Here is the way to run & debug using maven jetty plugin. We can't add Jetty server as servers in Netbeans. Run project: Right click on project and open the properties. click on "Actions" on left side. On right side there will be list of available actions.  To run jetty can be created a new action or override default "Run Project" Here I am overriding default one, Because I can run the project just by hitting "F6" key click on "Run Project" Enter the value "Execute Goals" as "jetty:run", If you want run as offline add "jetty:run -o" "Active Profiles" can be empty In "set Properties" field we can set like skip test. Here I am skipping test. Done, After setting y...
2 comments
Read more

remove(unset) property in a property file using ANT PropertyFile task

Using PropertyFile task we can edit the property file during ANT build. Edit property value are very easy and can find here details. http://ant.apache.org/manual/Tasks/propertyfile.html but delete a property or comment a property is the tricky one. If we are using latest ant version (1.8.1 or later), we can delete a property like below. <propertyfile file="my.properties" comment="My properties">   < entry  key="propertykey" operation="del"/> < /propertyfile> but the older version that is before 1.8.1 don't have operation called " del ", if we run the command in lower version ant, we will get a error says undefined operation "del".      there is workaround instead deleting a property we can comment that property using ant's replace command. < replace file="sample.properties">                      < replacefilter token="propertykey" value="#propert...
Post a Comment
Read more

Secure Coding Guidelines for the Java Programming Language

http://www.oracle.com/technetwork/java/seccodeguide-139067.html Secure Coding Guidelines for the Java Programming Language, Version 3.0 Introduction 0 Fundamentals Guideline 0-1 Prefer to have obviously no flaws than no obvious flaws Guideline 0-2 Design APIs to avoid security concerns Guideline 0-3 Avoid duplication Guideline 0-4 Restrict privileges Guideline 0-5 Establish trust boundaries Guideline 0-6 Contain sensitive data Guideline 0-7 Particular data format and API issues Guideline 0-7a Avoid dynamic SQL Guideline 0-7b XML and HTML generation requires care Guideline 0-7c Restrict XML inclusion Guideline 0-7d Take care interpreting untrusted code 1 Accessibility and Extensibility Guideline 1-1 Limit the accessibility of classes,interfaces, methods, and fields Guideline 1-1a Limit the accessibility of packages Guideline 1-1b Isolate unrelated code Guideline 1-2 Limit the extensibility of classes and methods Guideline 1-3 Understand how a su...
Post a Comment
Read more