Well, a quick hint here.
I was doing some tests with a pre-compiled jar and an older version of java. But I didn’t know which version specifically it was compiled – javaassist.jar
To solve this mistery then:
# jar xf javassist.jar
# cd javassist/
# file Loader.class
Result: Loader.class: compiled Java class data, version 51.0 (Java 1.7)
1.7 Therefore, we are all good.
Reading about some issues with jvm here and I found that recently that jmap is actually an estimation based on <sizes for the different types of data a classloader loads>
Jmaps is used to verify several memory statistics from the jvm. I mean, it’s quite useful.
This tutorial is very helpful btw
Sometimes this estimation might fail quite a bit as in this case.
sun.jvm.hotspot.tools.PermStat.computeSize:private long computeSize(InstanceKlass k) {
long size = 0L;
// the InstanceKlass object itself
size += k.getObjectSize();
// Constant pool
ConstantPool cp = k.getConstants();
size += cp.getObjectSize();
size += objectSize(cp.getCache());
size += objectSize(cp.getTags());
// Interfaces
size += arraySize(k.getLocalInterfaces());
size += arraySize(k.getTransitiveInterfaces());
// Inner classes
size += objectSize(k.getInnerClasses());
// Fields
size += objectSize(k.getFields());
// Methods
ObjArray methods = k.getMethods();
int nmethods = (int) methods.getLength();
if (nmethods != 0L) {
size += methods.getObjectSize();
for (int i = 0; i < nmethods; ++i) {
Method m = (Method) methods.getObjAt(i);
size += m.getObjectSize();
size += objectSize(m.getConstMethod());
}
}
// MethodOrdering - an int array that records the original
// ordering of methods in the class file
size += arraySize(k.getMethodOrdering());
return size;
}I think it worth doing part two about this.
It has gradually become common within organizations and is already considered by many managers and professionals in several areas as a worldwide trend, this is BPM.
BPM is an acronym for Business Process Management. It is a discipline, a methodology of work with practices aimed at transforming the company through the management and optimization of its work processes, improving the organizational performance. Therefore it is neither a tool nor a software.
Processes are the basis of work in BPM, they are any activity or set of activities that takes an input, adding to it a value, and provides output generating a valued product. Then in a process are known the steps to be followed, the sequences in which they will occur, the people (or profile) involved in all the activities and the final product to be produced.
Harrington summarizes well the role of the process in a company: “Processes use the organization’s resources to deliver objective results to their customers” (Harrington, 1991).
All process has a flow, with beginning, processing and end. To help visualize this flow and still create a design pattern, the BPMN was developed, a a symbology and normative for process modeling, but this topic will be discussed in a new post.
-Gabriel A.
Java is very direct and clear until you hit the following wall:
7 (SIGBUS)
All this means that the /tmp directory is full!!!
[1] http://efod.se/java-sigbus/
I remember working with JS and using Angular framework, back in 2014/2015, and it was quite interesting to use the ng-app directive. But I actually never saw what was behind this directive on the html.
Actually, after seeing the init function, we verify that you can use more than one directive to start Angular framework. Be careful though, some validators DOES NOT RECOGNIZE ALL THEM. – if that’s the case, please declare a namespace
<html xmlns:ng="http://angularjs.org" ng-app>
This function takes the following names (angular directives)
names = [‘ng:app’, ‘ng-app’, ‘x-ng-app’, ‘data-ng-app’]
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To not miss any rocket launch at all, I follow Fight Scheduler, it combines all the launch of the world. I didn’t know China was able to send so many!
I just realized that I actually never wrote about Openshift here.
This a platform as service, PaaS, above IaaS and below the application, with Kubernetes and Docker. It is based in OpenShift Origin community project.
The original paper, they explains several principles regarding the design of software for cloud based containers.
I think we can get the main points, which should not be ignored:
• Aim for small image
• Support arbitrary user IDs.
• Mark important ports.
• Use volumes for persistent data.
• Set image metadata.
• Synchronize host and image.
The paper I think is very much complemented by the Container based patterns, presented in the end
> Module Container
> Adapter
> Sidecar /Sidekick patterns
> Container chains
(I love this presentation btw, Matthias is very funny and left the url’s for the photos in the end).
Actually it is interesting this site , trust radius, that brings reviews about productions.
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I was reading this weekend about SSL and security protocols that I got catch with Conscript and how it’s so interesting.
But I also got in contact with foundweekends and their goals to teach programming the weekend.
Conscript is this security protocol developed by google. According to them, Conscript is
It’s this cool group to teach programming during the weekend. Very cool, nice materials too.
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Well, first of, I really hope this जय गुरुदेव ॐ means actually what I’m thinking it is. It might not be, so yeah, bear with me on this one.
So, when I used to work at Voith back in Sao Paulo, 2012, I remember that all the Fridays were special days, i.e. Beatles day. It’s the day we only listen to their songs. My boss that time, Renato C., aka campix, used to explain stories about each one of the songs, including this one – Across the Universe[1].
Although I left Voith to pursue my career in Canada, I still remember to play Beatles on Fridays’ evenings. It’s kind of a connection to the past and good memories. Also, it reminds me of a good friend that it’s no longer nearby.
Jai Guru Deva Om means I give thanks to Guru Dev.
[1] https://www.youtube.com/watch?v=R_ApBrVJD48
I don’t know how I didn’t posted about this before, but it’s quite interesting to post about Google Open Source. I remember when I heard about the Summer Camp for the first time by Suchakrapani, man, it was amazing.
Overhead de Melo 