tests: add prism agent benchmarks project (#334)

Supported simulations:
* Connection protocol simulation
* Credential Issuance protocol simulation

.github/workflows/performance-tests.yml

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+name: Performance tests
+
+concurrency:
+  group: ${{ github.head_ref }}${{ github.ref }}-performance-tests
+  cancel-in-progress: true
+
+on:
+  schedule:
+    - cron: "0 3 * * *"
+  pull_request:
+    paths:
+      - ".github/workflows/performance-tests.yml"
+      - "tests/performance-tests/**"
+  push:
+    branches:
+      - "main"
+  workflow_dispatch:
+
+defaults:
+  run:
+    shell: bash
+    working-directory: "tests/performance-tests/prism-performance-tests"
+
+jobs:
+  run-e2e-tests:
+    name: "Run performance tests"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Setup Java and Scala
+        uses: olafurpg/setup-scala@v13
+        with:
+          java-version: [email protected]
+
+      - name: Setup Gradle
+        uses: gradle/gradle-build-action@v2
+
+      - name: Install Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.8'
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ secrets.ATALA_GITHUB_ACTOR }}
+          password: ${{ secrets.ATALA_GITHUB_TOKEN }}
+
+      - name: Install Compose
+        uses: ndeloof/[email protected]
+        with:
+          version: v2.12.2 # defaults to 'latest'
+          legacy: true    # will also install in PATH as `docker-compose`
+
+      - name: Start services for issuer
+        env:
+          PORT: 8080
+        uses: isbang/[email protected]
+        with:
+          compose-file: "./infrastructure/shared/docker-compose.yml"
+          compose-flags: "--env-file ./infrastructure/local/.env -p issuer"
+          up-flags: "--wait"
+          down-flags: "--volumes"
+
+      - name: Start services for holder
+        env:
+          PORT: 8090
+        uses: isbang/[email protected]
+        with:
+          compose-file: "./infrastructure/shared/docker-compose.yml"
+          compose-flags: "--env-file ./infrastructure/local/.env -p holder"
+          up-flags: "--wait"
+          down-flags: "--volumes"
+
+      - name: Run performance tests
+        run: |
+          ./gradlew gatlingRun
+
+      - uses: actions/upload-artifact@v2
+        with:
+          name: performance-tests-results
+          path: tests/performance-tests/prism-performance-tests/build/reports

tests/performance-tests/prism-performance-tests/.gitignore

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+.gradle
+**/build/
+!src/**/build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Avoid ignore Gradle wrappper properties
+!gradle-wrapper.properties
+
+# Cache of project
+.gradletasknamecache
+
+# Eclipse Gradle plugin generated files
+# Eclipse Core
+.project
+# JDT-specific (Eclipse Java Development Tools)
+.classpath

tests/performance-tests/prism-performance-tests/README.md

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+# Atala PRISM V2 Performance Gatling Project
+
+Welcome to performance measurements project for Atala PRISM V2.
+
+The project is written on Kotlin and uses [Gatling](https://gatling.io/) load test framework.
+
+## Project structure
+
+The project is divided by the following main modules:
+* `common`: general module for constants and utility functions
+* `simulations`: Gatling simulations
+* `steps`: simulation steps that can be combined into simulations later
+
+## Running simulations
+
+To run all simulations, use the following command:
+```shell
+./gradlew gatlingRun
+```
+
+To run a specific simulation, specify the full path to the required simulation file.
+For example, running `ConnectionSimulation` from `simulations` package:
+```shell
+./gradlew gatlingRun-simulations.ConnectionSimulation
+```
+
+## Environments configuration
+
+There are multiple configuration environment variables available through `common.Configuration` module:
+* `ISSUER_AGENT_URL`: URL for Issuer Agent, example: `http://localhost:8080/prism-agent`
+* `ISSUER_AGENT_API_KEY`: access key for Issuer agent if hosted on remote env
+* `HOLDER_AGENT_URL`: URL for Holder Agent, example: `http://localhost:8090/prism-agent`
+* `HOLDER_AGENT_API_KEY`: access key for Holder agent if hosted on remote env

tests/performance-tests/prism-performance-tests/build.gradle.kts

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+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+    kotlin("jvm") version "1.7.21"
+    id("io.gatling.gradle") version "3.9.0.2"
+}
+
+group = "io.atala.prism"
+version = "0.1.0"
+
+repositories {
+    mavenCentral()
+}
+
+gatling {
+    logLevel = "WARN"
+    // set to 'ALL' for all HTTP traffic in TRACE, 'FAILURES' for failed HTTP traffic in DEBUG
+    logHttp = io.gatling.gradle.LogHttp.NONE
+}
+
+dependencies {
+    testImplementation(kotlin("test"))
+}
+
+tasks.test {
+    useJUnitPlatform()
+}
+
+tasks.withType<KotlinCompile> {
+    kotlinOptions.jvmTarget = "1.8"
+}

tests/performance-tests/prism-performance-tests/gradle.properties

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+kotlin.code.style=official

tests/performance-tests/prism-performance-tests/gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists