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Java profiling

async-profiler

Low overhead sampling profiler for Java that does not suffer from Safepoint bias problem.

• async-profiler

./profiler.sh -e wall -t -i 5ms -f result.svg 8983

ssledz

Choose archetype:
1: remote -> br.gov.frameworkdemoiselle.archetypes:demoiselle-jsf-jpa (Archetype for web applications (JSF + JPA) using Demoiselle Framework)
2: remote -> br.gov.frameworkdemoiselle.archetypes:demoiselle-minimal (Basic archetype for generic applications using Demoiselle Framework)
3: remote -> co.ntier:spring-mvc-archetype (An extremely simple Spring MVC archetype, configured with NO XML.)
4: remote -> com.agilejava.docbkx:docbkx-quickstart-archetype (-)
5: remote -> com.alibaba.citrus.sample:archetype-webx-quickstart (-)
6: remote -> com.bsb.common.vaadin:com.bsb.common.vaadin.embed-simple-archetype (-)
7: remote -> com.bsb.common.vaadin:com.bsb.common.vaadin7.embed-simple-archetype (-)
8: remote -> com.cedarsoft.open.archetype:multi (-)
9: remote -> com.cedarsoft.open.archetype:simple (-)

ssledz

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 https://maven.apache.org/xsd/settings-1.0.0.xsd">
  <profiles>
    <profile>
      <id>local</id>
      <properties>
        <internal.repo.path>file://${user.home}/mvn-repo/releases</internal.repo.path>
        <internal.snapshots-repo.path>file://${user.home}/mvn-repo/snapshots</internal.snapshots-repo.path>
      </properties>
    </profile>

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>group</groupId>
	<artifactId>dummy</artifactId>
	<name>Dummy Project</name>
	<version>1.0.12</version>
	<packaging>pom</packaging>
	<scm>
		<connection>scm:git:https://......</connection>
		<tag>HEAD</tag>

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installation

sudo add-apt-repository ppa:octave/stable
sudo apt-get update
sudo apt-get install octave

resources

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Outputting floor numbers with two decimal digits with dot as a decimal separator

DecimalFormatSymbols symbols = DecimalFormatSymbols.getInstance();
symbols.setDecimalSeparator('.');
DecimalFormat df = new DecimalFormat("#.##", symbols);
df.setRoundingMode(RoundingMode.FLOOR);
df.setGroupingUsed(false);
df.format(1.2345); // 1.23

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#!/bin/bash

DBG=0

dbg() {
  [[ $DBG == 1 ]] && (1>&2 echo "[DEBUG] : "$1)
}

info() {
  echo "[INFO] : $1"

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#!/bin/bash

DBG=0

dbg() {
  [[ $DBG == 1 ]] && (1>&2 echo "[DEBUG] : "$1)
}

info() {
  echo "[INFO] : $1"

ssledz

# legend

^ means ctrl

# ctags

:!ctags *.m
:ta[g][!] tagstring # edit the file containing tagstring
:po[p][!]           # pop the tagstack by one element
:tags

ssledz

check what listening on port 80

sudo ss -nltp | grep 80

encrypting compressed folder

tar cz my_folder/ | openssl enc -aes-256-cbc -e > encrypted.tar.gz.enc