Day: July 26, 2021

List of Top 5 Message queue software in 2021

by vikashdev kGeneralLeave a Comment on List of Top 5 Message queue software in 2021
  • MuleSoft Anypoint Platform.
  • IBM MQ.
  • Azure Scheduler.
  • Apache kafka
  • TIBCO Rendezvous

What is function of Message queue?

Message queues provide a form of message passing in which any process can read a message from or write a message to any IPC message queue on the system. There are no requirements that a process be waiting to receive a message from a queue before another process sends one, or that a message exist on the queue before a process requests to receive one.

What is Message queue?

A message queue is a queue of messages sent between applications. It includes a sequence of work objects that are waiting to be processed.

Another application, called a consumer, connects to the queue and gets the messages to be processed. Messages placed onto the queue are stored until the consumer retrieves them.

Why do we need Message queue?

  • Queue is used when things don’t have to be processed immediately.
  • It have to be processed in First In First Out order like Breadth First Search. 

What is message queue example?

 Is Kafka a message queue?

We can use Kafka as a Message Queue or a Messaging System but as a distributed streaming platform Kafka has several other usages for stream processing or storing data.

We can use Apache Kafka as:

  • Messaging System.
  • Storage System.
  • Streaming Platform.

How do I create a messaging queue?

Creates a new queue at the specified path on a Message Queuing server.

Overloads

  • Create(String):- Creates a non-transactional Message Queuing queue at the specified path.
  • Create(String, Boolean):- Creates a transactional or non-transactional Message Queuing queue at the specified path.

Create(String)

Creates a non-transactional Message Queuing queue at the specified path.

:- public static System.Messaging.MessageQueue Create (string path);

Parameters

path String

The path of the queue to create.

Returns

MessageQueue

A MessageQueue that representes the new queue.

Exceptions

ArgumentException

The path parameter is null or is an empty string (“”).

MessageQueueException

A queue already exists at the specified path.

-or-

An error occurred when accessing a Message Queuing method.

Examples

The following code example creates public and private queues. It sends a message to selected queues.

using System;
using System.Messaging;

namespace MyProject
{
/// /// Provides a container class for the example. ///
public class MyNewQueue
{

}

How do I read message queue?

Read messages from queues using the get next statement with the message queue record as the I/O object.When you use the get next statement, EGL performs the following actions:

  • Connects to the queue manager, if the queue manager is not already connected.
  • Opens the queue, if the queue is not already open.
  • Gets the next message from the queue.

You must use a local definition of the remote queue on the currently connected queue manager if both of the following circumstances are true:

  • You are reading messages from a queue on another Queue Manager using the get next statement.
  • You previously read a message from a queue using the get next statement.

You must use the close statement after a get next statement to close the connection to the queue in any of the following circumstances:

  • Before using the add statement.
  • To release the queue for access by another program.
  • To release the queue if you have a long running program and have completed work with the queue.

EGL automatically closes the connection to the queue on program termination.

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Tutorial for Spaceship operators

by Ashwani KumarphpLeave a Comment on Tutorial for Spaceship operators

What is Spaceship operators?

PHP 7 introduces a new spacecraft operator (=>) for comparing two words. It’s also known as the combined contrast operator.

The spacecraft operator yields 0 if the two operands are equal, 1 if the left is bigger, and -1 if the right is larger. In the following table, the three-way comparison is essentially shown:

Example:-

Output:-

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Tutorial for Array operators

by Ashwani KumarphpLeave a Comment on Tutorial for Array operators

What is Array Operators?

The array operators are used to compare arrays. To compare various arrays, use the operations shown below. Make sure you’re using proper grammar.

  • Operator Name Example Result
  • + Union $x + $y Union of $x and $y
  • == Equality $x == $y Returns true if $x and $y have the same key/value pairs
  • === Identity $x === $y Returns true if $x and $y have the same key/value pairs in the same order and of the same types
  • != Inequality $x != $y Returns true if $x is not equal to $y
  • <> Inequality $x <> $y Returns true if $x is not equal to $y
  • !== Non-identity $x !== $y Returns true if $x is not identical to $y

Example:-

Output:-

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Tutorial for String operators

by Ashwani KumarphpLeave a Comment on Tutorial for String operators

What is String operators?

There are two string operators available. The usage of numerical numbers might lead to unexpected outcomes:

  1. The PHP operator (.) is also known as the concatenation operator. It joins separate threads together.
  2. The PHP operator (.=) is also known as the combined assignment operator. It connects the argument to the one on the right page, on the left.
  • Operator Name Example Result
  • . Concatenation $txt1 . $txt2 Concatenation of $txt1 and $txt2
  • .= Concatenation assignment $txt1 .= $txt2 Appends $txt2 to $txt1

Example:-

Output:-

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Tutorial for Logical operators

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What is Logical operators?

They combine conditionals and are mostly used to track several conditions at the same time. For example, the PHP (or) operator verifies that at least one out of every two is correct. If you want to check if they’re both legitimate, you may use the PHP (and) operator. For further information, see the table below:

  • Operator Name Example Result
  • and And $x and $y True if both $x and $y are true
  • or Or $x or $y True if either $x or $y is true
  • xor Xor $x xor $y True if either $x or $y is true, but not both
  • && And $x && $y True if both $x and $y are true
  • || Or $x || $y True if either $x or $y is true
  • ! Not !$x True if $x is not true

Example:-

Output:-

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Tutorial for Increment/Decrement operators

by Ashwani KumarphpLeave a Comment on Tutorial for Increment/Decrement operators

What is Increment/Decrement operators?

These operations raise (increase) or reduce (decrease) the value of a vector (decrease). Because just one operator is employed, they are frequently referred to as uniform operators. To raise or reduce a value by a factor of one, operators for increasing and decreasing are used. Pre-incrementing operator The new $x value is returned when the value is added to it. See the table below for a better understanding:

  • Operator Name Description
  • ++$x Pre-increment Increments $x by one, then returns $x
  • $x++ Post-increment Returns $x, then increments $x by one
  • --$x Pre-decrement Decrements $x by one, then returns $x
  • $x-- Post-decrement Returns $x, then decrements $x by one

Example:-

Output:-

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Tutorial for Comparison operators

by Ashwani KumarphpLeave a Comment on Tutorial for Comparison operators

What is Comparison operators?

The comparison operator denotes the connection between two or more values in a number or a series. These php operators are simply used to compare the two values’ integers or strings. We’ll show you how to compare them using php operators in this article. This PHP operator is necessary for looking for discrepancies or correlations between values and variables. It behaves like a boolean, yielding either True or False. For example, if the two variables you’re comparing don’t have the same value, the PHP not equal to operator will return true.

  • Operator Name Example Result
  • == Equal $x == $y Returns true if $x is equal to $y
  • === Identical $x === $y Returns true if $x is equal to $y, and they are of the same type
  • != Not equal $x != $y Returns true if $x is not equal to $y
  • <> Not equal $x <> $y Returns true if $x is not equal to $y
  • !== Not identical $x !== $y Returns true if $x is not equal to $y, or they are not of the same type
  • > Greater than $x > $y Returns true if $x is greater than $y
  • < Less than $x < $y Returns true if $x is less than $y
  • >= Greater than or equal to $x >= $y Returns true if $x is greater than or equal to $y
  • <= Less than or equal to $x <= $y Returns true if $x is less than or equal to $y

Example:-

Outputs:-

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Tutorial for Assignment operators

by Ashwani KumarphpLeave a Comment on Tutorial for Assignment operators

What is Assignment operators?

PHP Assignment operators are used to assign values to variables. The right side value is substituted for the left side value in the operand variable. Operators in this category are in charge of assigning variables. The most frequent assignment operator is =, which assigns the operand’s right side to the left variable.

  • Assignment Same as… Description
  • x = y x = y The left operand gets set to the value of the expression on the right
  • x += y x = x + y Addition
  • x -= y x = x - y Subtraction
  • x *= y x = x * y Multiplication
  • x /= y x = x / y Division
  • x %= y x = x % y Modulus

Example:-

Output:-

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Tutorial for Arithmetic operators

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What is Arithmetic operators?

The arithmetic operator is used to do simple arithmetic operations such as adding, subtracting, multiplying, and so on. Simple arithmetic behavior of numerical values may be implemented using these operators. The table below demonstrates how the findings are used and what outcomes are achieved.

  • Operator Name Example Result
  • + Addition $x + $y Sum of $x and $y
  • - Subtraction $x - $y Difference of $x and $y
  • * Multiplication $x * $y Product of $x and $y
  • / Division $x / $y Quotient of $x and $y
  • % Modulus $x % $y Remainder of $x divided by $y
  • ** Exponentiation $x ** $y Result of raising $x to the $y'th power (Introduced in PHP 5.6)

Example:-

Output:-

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Tutorials for PHP Operators

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What is Operators in PHP?

Operators are symbols that tell the PHP processor what actions should be taken. The Add (+) sign, for example, instructs PHP to combine two variables or values, but the bigger (>) symbol instructs PHP to compare two values. Don’t make the mistake of assuming that operators and functions are the same. Instead of functional, such operators might be used (such as the PHP ternary).

  • Arithmetic operators
  • Assignment operators
  • Comparison operators
  • Increment/Decrement operators
  • Logical operators
  • String operators
  • Array operators
  • Spaceship operators
PHP Operators
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