drmalex07

README - Add membeof overlay in OpenLDAP

Update configuration using ldapmodify and using the following LDIF:

dn: cn=module,cn=config
cn: module
objectClass: olcModuleList
olcModuleLoad: memberof
olcModulePath: /usr/lib/ldap

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An example service definition under /etc/systemd/system/foo.service:

[Unit]

Description=Foo Service
After=network.target 

[Service]

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import java.io.DataInputStream;
import java.io.EOFException;
import java.io.IOException;

import org.apache.commons.io.IOUtils;
import org.apache.commons.io.input.BoundedInputStream;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.ContentSummary;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;

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import java.io.File;
import java.io.IOException;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.spark.launcher.SparkAppHandle;
import org.apache.spark.launcher.SparkLauncher;

/**
 * An example of submitting a Spark application in a programmatic manner 
 */

drmalex07

README - Submit to Livy using REST API

See https://livy.apache.org/docs/latest/rest-api.html

Let app.json be the JSON payload that represents the application:

{
    "file": "hdfs:///user/user/apps/hello-spark-0.0.1.jar",
    "className": "acme.hello_spark.Grep",
 "args": ["input/1.txt", "[Mm]agic"],

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README - SSL context for Apache HttpClient

Load keystore as usual:

KeyStore keystore = KeyStore.getInstance("PKCS12");
try (InputStream in = Files.newInputStream("keystore.p12")) {
  keystore.load(in, "secret".toCharArray());
}

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README - Lombok

In the following examples, i also add field-level constraints for JSR-303 validation.

1. Typical usage

1.A. A java bean (getters/setters)

@lombok.Data

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Readme - List directory in WebDAV

1. An example request

To list properties of a directory we must use the PROPFIND method of WebDAV protocol and provide a request body with properties we are interested into. We must also provide the Depth header (otherwise the request is rejected as 403 Forbidden).

To retrieve basic properties as size and type, prepare a request body (say propfind-basic.xml) as:

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Readme

We need to enable at least the following modules: headers, env, proxy, proxy_http, proxy_balancer. If we are proxying over AJP of course we should also enable proxy_ajp.

The following is a sample configuration for a site acting as a balancer to 2 instances of a backend application:

<IfModule mod_ssl.c>
    <VirtualHost 192.168.1.6:443>

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#include <iostream>

using namespace std;

constexpr int get_magic_number(int x)
{
    return x + 1999;
}

template <int N>