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--- gradle [2021/02/19 00:08] – skipidar
+++ gradle [2021/04/14 07:13] (current) – skipidar
@@ Line 138: / Line 138: @@
 }
 </code>
+=== Fork a Java process from Gradle ===
+Here a snippet about forking the process,
+e.g. for launching the app under test for load tests, contract tests.
+It waits for the Spring boot application to come up.
+For that it looks at the port 8080 and checks the STDOUT for the string "started".
+Example:
+https://github.com/skipidar/spring-boot-template
+<sxh java>
+buildscript {
+    repositories {
+        mavenCentral()
+        maven {
+            url 'https://plugins.gradle.org/m2/'
+        }
+    }
+    dependencies {
+        classpath("org.springframework.boot:spring-boot-gradle-plugin:$springbootVersion")
+        classpath "gradle.plugin.com.github.hesch:gradle-execfork-plugin:0.1.15"
+    }
+}
+plugins {
+    id "au.com.dius.pact" version "4.2.2"
+    id 'com.github.hesch.execfork' version '0.1.15'
+}
+apply plugin: "org.springframework.boot"
+jar {
+    baseName = 'account-api'
+    version = "$version"
+}
+dependencies {
+    compile(
+            "org.springframework.boot:spring-boot-starter-parent:$springbootVersion",
+            "org.springframework.boot:spring-boot-starter-web:$springbootVersion",
+            "org.springframework.boot:spring-boot-starter-jersey:$springbootVersion",
+            "javax.xml.bind:jaxb-api:2.3.1",
+            "org.slf4j:slf4j-api:$slf4jVersion"
+    )
+    testCompile(
+            "org.assertj:assertj-core:$assertjVersion",
+            "org.springframework.boot:spring-boot-starter-test:$springbootVersion"
+    )
+}
+task startProvider(type: com.github.psxpaul.task.JavaExecFork) {
+    classpath = sourceSets.main.runtimeClasspath
+    main = 'com.dius.account.Application'
+//    args = [ '-d', '/foo/bar/data', '-v', '-l', '3' ]
+    jvmArgs = ['-Xmx500m', '-Djava.awt.headless=true']
+    workingDir = "$buildDir/server"
+    standardOutput = "$buildDir/daemon.log"
+    errorOutput = "$buildDir/daemon-error.log"
+//    stopAfter = verify
+    waitForPort = 8080
+    waitForOutput = 'started'
+//    environment 'JAVA_HOME', "C:\\Program Files\\AdoptOpenJDK\\jdk-11.0.7.10-hotspot"
+}
+</sxh>
+Assuming that the SPring boot application is under
+<sxh java>
+package com.dius.account;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+@SpringBootApplication
+public class Application {
+    public static void main(String[] args) {
+        new SpringApplicationBuilder(Application.class).run(args);
+    }
+}
+</sxh>