Solutions for elusive IT issues

HashiCorp Vault is  a secrets management tool specifically designed to control access to sensitive credentials in a low-trust environment . It can be used to store sensitive values and at the same time dynamically generate access for specific services/applications on lease.  Integrating the vault with Ansible Etower provides robust and secure automation. Following is the step-by-step guide for the integration. Enable key-value secret engine in Hashi Vault (also known as "kv" engine). Let's call the engine, the "kv" engine. Create a secret inside "kv". A secret can be a collection of key-value pairs or a JSON for nested structure.            Lets assume that secrets are stored as JSON  in the format   { "my_app":{ "service_account_name": "some_service", "service_account_password": "some_password" } } Create a secret policy defining what can be done with the above-defined secret. Create an

 Lets assume there is a json with following structure 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 { "dev" :{ "app_1" :{ "key" : "element" , "value" : "somevalue" }, "app_2" :{ "key" : "element" , "value" : "somevalue" } }, "test" :{ "app_1" :{ "key" : "element" , "value" : "somevalue" }, "app_2" :{ "key" : "element" , "value" : "somevalue" } }, "production" :{ "app_1" :{ "key" : "element" , "value" : "somevalue" }, "app_2" :{ "key" : &

 Java currency formatting problem. Following code shows the conditions when the currency symbol is replaced by an alt currency symbol. public class Test { public static void main(String[] args){ double num = 1323.526; Locale eng = new Locale("", ""); NumberFormat engFormat = NumberFormat.getCurrencyInstance(eng); System.out.println(engFormat.format(num)); eng = new Locale("en", ""); engFormat = NumberFormat.getCurrencyInstance(eng); System.out.println(engFormat.format(num)); eng = new Locale("en", "en_US"); engFormat = NumberFormat.getCurrencyInstance(eng); System.out.println(engFormat.format(num)); eng = new Locale("", "US"); engFormat = NumberFormat.getCurrencyInstance(eng); System.out.println(engFormat.format(num)); eng = new Locale(

I was working on an algorithm to detect lines in a image. I found many solutions online, but none of them seem to work to my satisfaction. Thereafter, I decided to write an algorithm, which can work to my satisfaction. This algorithm can detect horizontal, vertical and angled lines. Following is the pseudo code of the algorithm. The implementation is in Python and it uses third party code. pix_array = Convert the image into 2D pixel array  Mono chromate the pixel array by setting values between 0-200 as 0 (black) and greater than 200 as 255(white) as  image_width = length of pix_array[0] image_height = length of pix_array Loop through pix_array, i.e. 1 pixel high horizontal slice of image: h = x coordinate of current pixel k = y coordinate of current pixel choose a value of radius as r draw a circle taking h,k as center using equation (X-h)^2 + (Y-k)^2 = r^2 derive values of X and Y and check if pix_arrY[X][Y] is black (0) if black add them to possible line coordinate

Following example demonstrates, how to use Java streams to group an object based on its property and transforming the object to some other Class before they are collected in a list. In the following example, we create a list of objects of Class A and stream the list to produce a map based on a property of Class A but containing a list of objects of Class B. public class A { public A(String a) { super(); this.a = a; } private String a; public String getA() { return a; } public void setA(String a) { this.a = a; } } public class B { public B(String a) { super(); this.a = a; } private String a; public String getA() { return a; } public void setA(String a) { this.a = a; } } public class Main { public static void main(String a[]) { A a1 =

Many times we encounter this error and think that there might be some JPA issue or network issue. However, the error is pretty explicit in its nature, but still not clear to ring the bell very first time. As the error says there is a timeout, and since Oracle is saying, we shall accept it. Another clue is "user requested cancel of current operation". This means that the connection was closed by the application server not the database server, hence it can be safely concluded that application has configured timeouts on transactions at its end. However, if you feel that this transaction should have been concluded within the application server limits, your doubt might be true. This problem can arise in case there is a lock on the record being updated by JPA or lock on the table in which JPA is attempting to insert. The lock is most probably being held by some other application, and since application server configuration is on aggressive SLA, the transaction is waiting its