then:
        noExceptionThrown()
        jarFile1 && jarFile2
        jarFile1.exists() && jarFile2.exists()
        jarFile1 == jarFile2
    }

    def "only generates single JAR in cache when invoked by concurrent threads"() {
        given:
        def jarGenerationInvocations = 10
        def triggeredJarFileGeneration = new AtomicInteger()
        def jarFiles = Collections.synchronizedList(new ArrayList<File>())

        and:
        file("b/build/classes/java/main/b/B.class").delete()
        def jarFile = file("b/build/libs/b.jar")
        jarFile.isFile()

        and:
        configurationCacheRun "clean"

        and:
        configurationCacheRun ":b:assemble"

        then:
        new ZipTestFixture(jarFile).assertContainsFile("b/B.class")
    }

            IoActions.closeQuietly(jarFile);
        }

        private JarFile getJarFileLocked() throws IOException {
            ensureOpened();
            if (jarFile == null) {
                jarFile = JarCompat.open(transformedJarPath);
                if (jarFile.isMultiRelease() && !isTransformed(jarFile.getJarFile())) {
                    throw new GradleException(String.format(

        @Override
        public void accept(PersistentCache cache) {
            try {
                File jarFile = jarFile(cache);
                LOGGER.debug("Generating worker process classes to {}.", jarFile);
                try (ZipOutputStream outputStream = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(jarFile)))) {
                    for (Class<?> classToMap : getClassesForWorkerJar()) {

    @get:InputArtifact
    @get:Classpath
    abstract val inputArtifact: Provider<FileSystemLocation>

    override fun transform(outputs: TransformOutputs) {
        val jarFile = inputArtifact.get().asFile
        val zipFile = ZipFile(jarFile)
        val outputRoot = outputs.dir("public-api")
        zipFile.stream().forEach { entry ->
            if (entry.shouldInclude()) {

        PluginDescriptor pluginDescriptor = null;

        File pluginFile = pluginArtifact.getFile();

        try {
            if (pluginFile.isFile()) {
                try (JarFile pluginJar = new JarFile(pluginFile, false)) {
                    ZipEntry pluginDescriptorEntry = pluginJar.getEntry(getPluginDescriptorLocation());

                    if (pluginDescriptorEntry != null) {

        // Changes to jar files won't be noticed in all cases when caching is enabled.
        // sun.net.www.protocol.jar.JarURLConnection leaves the JarFile instance open if URLConnection caching is enabled.
        try {
            URL url = new URL("jar:file://valid_jar_url_syntax.jar!/");
            URLConnection urlConnection = url.openConnection();

        this
    }

    def jarWithClasses(Map<String, String> javaSourceFiles, TestFile jarFile) {
        def builder = artifactBuilder()
        for (Map.Entry<String, String> entry : javaSourceFiles.entrySet()) {
            builder.sourceFile(entry.key + ".java").text = entry.value
        }
        builder.buildJar(jarFile)
    }

    public MavenFileRepository maven(TestFile repo) {