Examples with ClassLoaders.withClassLoader org.flyte.jflyte.ClassLoaders.withClassLoader used on opensource projects

Example 1 with ClassLoaders.withClassLoader

use of org.flyte.jflyte.ClassLoaders.withClassLoader in project flytekit-java by flyteorg.

the class ExecuteDynamicWorkflow method execute.

private void execute() {
    Config config = Config.load();
    ExecutionConfig executionConfig = ExecutionConfig.load();
    Collection<ClassLoader> modules = ClassLoaders.forModuleDir(config.moduleDir()).values();
    Map<String, FileSystem> fileSystems = FileSystemLoader.loadFileSystems(modules);
    FileSystem outputFs = FileSystemLoader.getFileSystem(fileSystems, outputPrefix);
    ProtoWriter protoWriter = new ProtoWriter(outputPrefix, outputFs);
    try {
        FileSystem inputFs = FileSystemLoader.getFileSystem(fileSystems, inputs);
        ProtoReader protoReader = new ProtoReader(inputFs);
        TaskTemplate taskTemplate = protoReader.getTaskTemplate(taskTemplatePath);
        ClassLoader packageClassLoader = PackageLoader.load(fileSystems, taskTemplate);
        Map<String, String> env = getEnv();
        Map<WorkflowIdentifier, WorkflowTemplate> workflowTemplates = ClassLoaders.withClassLoader(packageClassLoader, () -> Registrars.loadAll(WorkflowTemplateRegistrar.class, env));
        Map<TaskIdentifier, RunnableTask> runnableTasks = ClassLoaders.withClassLoader(packageClassLoader, () -> Registrars.loadAll(RunnableTaskRegistrar.class, env));
        Map<TaskIdentifier, DynamicWorkflowTask> dynamicWorkflowTasks = ClassLoaders.withClassLoader(packageClassLoader, () -> Registrars.loadAll(DynamicWorkflowTaskRegistrar.class, env));
        // before we run anything, switch class loader, otherwise,
        // ServiceLoaders and other things wouldn't work, for instance,
        // FileSystemRegister in Apache Beam
        // we don't take the whole "custom" field, but only jflyte part, for that we ser-de it
        Struct custom = JFlyteCustom.deserializeFromStruct(taskTemplate.custom()).serializeToStruct();
        // all tasks already have staged jars, we can reuse 'jflyte' custom from current task to get
        // it
        Map<TaskIdentifier, TaskTemplate> taskTemplates = mapValues(ProjectClosure.createTaskTemplates(executionConfig, runnableTasks, dynamicWorkflowTasks), template -> template.toBuilder().custom(ProjectClosure.merge(template.custom(), custom)).build());
        DynamicJobSpec futures = withClassLoader(packageClassLoader, () -> {
            Map<String, Literal> input = protoReader.getInput(inputs);
            DynamicWorkflowTask task = getDynamicWorkflowTask(this.task);
            return task.run(input);
        });
        DynamicJobSpec rewrittenFutures = rewrite(executionConfig, futures, taskTemplates, workflowTemplates);
        if (rewrittenFutures.nodes().isEmpty()) {
            Map<String, Literal> outputs = getLiteralMap(rewrittenFutures.outputs());
            protoWriter.writeOutputs(outputs);
        } else {
            protoWriter.writeFutures(rewrittenFutures);
        }
    } catch (ContainerError e) {
        LOG.error("failed to run dynamic workflow", e);
        protoWriter.writeError(ProtoUtil.serializeContainerError(e));
    } catch (Throwable e) {
        LOG.error("failed to run dynamic workflow", e);
        protoWriter.writeError(ProtoUtil.serializeThrowable(e));
    }
}