The latest articles on DEV Community by Faisal (@peysal). https://dev.to/peysal https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F124584%2Ff8e25292-63e8-44df-873c-e60d2ed7c7c2.jpeg https://dev.to/peysal en Faisal Fri, 04 Jan 2019 13:32:25 +0000 https://dev.to/peysal/technical-leadership-quick-test-1oc https://dev.to/peysal/technical-leadership-quick-test-1oc <h2> introduction </h2> <p>you are a programmer. Then one fine day, top management decided to upgrade you to the next level. </p> <ul> <li>add senior to ur title</li> <li>replace existing title with manager something</li> <li>add lead to existing title</li> </ul> <h2> qualification </h2> <p>So u been wondered, what makes a programmer or developer upgrade to the next level? </p> <ul> <li>more story point burn compare to other developer?</li> <li>less bug introduce with each line of code?</li> <li>number of year experience</li> <li>centre of attention when there is a fire?</li> </ul> <p><a href="https://i.giphy.com/media/349qKnoIBHK1i/giphy.gif" class="article-body-image-wrapper"><img src="https://i.giphy.com/media/349qKnoIBHK1i/giphy.gif" alt="test"></a></p> <blockquote> <p>with great power comes great responsibility </p> </blockquote> <h2> quick test on leadership potential </h2> <p>Now how do you know if any of ur team member have the potential to be part of leadership role? Just ask any <strong><em>developer</em></strong> whether they willing to be part of this person new team.<br> You will be surprise by how effective this test can be.<br> You can't be a leader if no one is following you.</p> leadership Faisal Tue, 01 Jan 2019 19:40:46 +0000 https://dev.to/peysal/jboss-eap-71--spring-boot-hello-world--visualvm-observation-2e1i https://dev.to/peysal/jboss-eap-71--spring-boot-hello-world--visualvm-observation-2e1i <h1> Introduction </h1> <p>In my previous post, we already knew how much jboss-eap-7.1 will eat up your memory by default ( no deployment ). Now time to see how simple deployment spring boot hello world will eat up our memory inside JBOSS.</p> <h2> tools involved </h2> <ol> <li>jboss eap 7.1 ( duh )</li> <li>visualVm</li> </ol> <h2> how we did it </h2> <ol> <li>create a simple hello world spring mvc</li> <li>deploy it into already running jboss eap</li> <li>monitor the visual vm for increase of memory usage</li> </ol> <h3> output </h3> <p>heap size after deployment:<br> <a href="https://res.cloudinary.com/practicaldev/image/fetch/s--CCuFYR7M--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/lsm7z9hso5wk6og0jchp.png" class="article-body-image-wrapper"><img src="https://res.cloudinary.com/practicaldev/image/fetch/s--CCuFYR7M--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/lsm7z9hso5wk6og0jchp.png" alt="heap size after deployment"></a></p> <p>metaspace after deployment:<br> <a href="https://res.cloudinary.com/practicaldev/image/fetch/s--M-jnolzV--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/nu6igcauhqjpps1mw3y0.png" class="article-body-image-wrapper"><img src="https://res.cloudinary.com/practicaldev/image/fetch/s--M-jnolzV--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/nu6igcauhqjpps1mw3y0.png" alt="metaspace after deployment"></a></p> <p>class loaded after deployment:<br> <a href="https://res.cloudinary.com/practicaldev/image/fetch/s--rcVSQGt_--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/ev1d9r7wd859mqzxn35t.png" class="article-body-image-wrapper"><img src="https://res.cloudinary.com/practicaldev/image/fetch/s--rcVSQGt_--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/ev1d9r7wd859mqzxn35t.png" alt="class loaded after deployment"></a></p> <h3> some theory on what just happened? </h3> <ol> <li>hey this war have bunch of library &amp; class need to be load</li> <li>object creation causing increase in heap size</li> </ol> <h3> things to ponder </h3> <ol> <li>what if we deploy another war inside same jboss instance? </li> <li>what if this new war shared same library with the previous war?</li> </ol> jboss springboot visualvm Faisal Tue, 01 Jan 2019 02:18:02 +0000 https://dev.to/peysal/jboss-eap-71-without-deployment-artifact-and-memory-usage-3bol https://dev.to/peysal/jboss-eap-71-without-deployment-artifact-and-memory-usage-3bol <h1> The big question </h1> <p>Do you actually know how much eap-7.1 will use your memory by default? <br> So before you start deploying your application might as well u do a bit of benchmark.</p> <h2> tools we will be using </h2> <ul> <li>jboss-eap-7.1 ( duh)</li> <li>visualvm-1.4.2</li> </ul> <h2> how we do it </h2> <ol> <li>run your eap</li> <li>fire up your visualvm</li> <li>connect your visualvm with the right jvm process </li> </ol> <h2> output </h2> <p><a href="https://res.cloudinary.com/practicaldev/image/fetch/s--KkIPz-OE--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/6vmx4tr1y0q4jovfmv99.png" class="article-body-image-wrapper"><img src="https://res.cloudinary.com/practicaldev/image/fetch/s--KkIPz-OE--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/6vmx4tr1y0q4jovfmv99.png" alt="heap without any deployment artifact"></a></p> <p><a href="https://res.cloudinary.com/practicaldev/image/fetch/s--U24fJPvY--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/psbyi8w51d4ws53tvw75.png" class="article-body-image-wrapper"><img src="https://res.cloudinary.com/practicaldev/image/fetch/s--U24fJPvY--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/psbyi8w51d4ws53tvw75.png" alt="metaspace without any deployment artifact"></a></p> <p><a href="https://res.cloudinary.com/practicaldev/image/fetch/s--k_zYJGaf--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/g0kk1ohui081mkyq5vtm.png" class="article-body-image-wrapper"><img src="https://res.cloudinary.com/practicaldev/image/fetch/s--k_zYJGaf--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/g0kk1ohui081mkyq5vtm.png" alt="number of classes loaded by eap without deployment artifact"></a></p> <h2> things to ponder </h2> <ol> <li>What will happen when you deploy simple spring MVC REST hello world?</li> <li>Do anyone need to know all of these JVM's memory management thingy? </li> </ol> jboss eap jvm