Adding backpressure design pattern #3233 #3214

	name: Java PR Builder

	on:
	pull_request_target:
	branches: [ master ]
	types: [ opened, reopened, synchronize ]

	permissions:
	contents: read

	jobs:
	build-and-analyze:

	name: Build on JDK 21
	runs-on: ubuntu-22.04
	steps:

	- name: Checkout Code
	uses: actions/checkout@v4
	with:
	ref: ${{ github.event.pull_request.head.sha }}

	- name: Set up JDK 21
	uses: actions/setup-java@v4
	with:
	java-version: '21'
	distribution: 'temurin'
	cache: 'maven'

	- name: Cache local Maven repository
	uses: actions/cache@v4
	with:
	path: ~/.m2/repository
	key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
	restore-keys: \|
	${{ runner.os }}-maven-

	# Cache Sonar packages which are used to run analysis and collect metrics
	- name: Cache SonarCloud packages
	uses: actions/cache@v4
	with:
	path: ~/.sonar/cache
	key: ${{ runner.os }}-sonar
	restore-keys: ${{ runner.os }}-sonar

	# Some tests need screen access
	- name: Install xvfb
	run: sudo apt-get install -y xvfb

	- name: Build with Maven and run SonarQube analysis
	env:
	# Intermediate variable
	HEAD_REF: ${{ github.head_ref }}
	# These two env variables are needed for sonar analysis
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
	run: xvfb-run ./mvnw clean verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.host.url=https://sonarcloud.io -Dsonar.organization=iluwatar -Dsonar.projectKey=iluwatar_java-design-patterns -Dsonar.pullrequest.branch=$HEAD_REF -Dsonar.pullrequest.base=${{ github.base_ref }} -Dsonar.pullrequest.key=${{ github.event.pull_request.number }}

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