vertx模块DeploymentManager部署管理器
DeploymentManager
public DeploymentManager(VertxInternal vertx) { this.vertx = vertx; loadVerticleFactories(); } /** * ServiceHelper本质对jdk ServiceLoader的封装，vertx大量使用 SPI 扩展功能实现 */ private void loadVerticleFactories() { Collection<VerticleFactory> factories = ServiceHelper.loadFactories(VerticleFactory.class); factories.forEach(this::registerVerticleFactory); VerticleFactory defaultFactory = new JavaVerticleFactory(); defaultFactory.init(vertx); defaultFactories.add(defaultFactory); }
verticle部署
/** * 部署verticle * @params identifier 类全限定名称 * @params options 部署选项 * @params completionHandler 回调处理逻辑 */ public void deployVerticle(String identifier, DeploymentOptions options, Handler<AsyncResult<String>> completionHandler) { if (options.isMultiThreaded() && !options.isWorker()) { throw new IllegalArgumentException("If multi-threaded then must be worker too"); } //获取context ContextImpl callingContext = vertx.getOrCreateContext(); //jdk9+不支持 isolationGroup，通常情况都不会使用isolationGroup ClassLoader cl = getClassLoader(options, callingContext); // deployment Id 采用 UUID doDeployVerticle(identifier, generateDeploymentID(), options, callingContext, callingContext, cl, completionHandler); } /** * 部署verticle 逻辑 */ private void doDeployVerticle(String identifier, String deploymentID, DeploymentOptions options, ContextImpl parentContext, ContextImpl callingContext, ClassLoader cl, Handler<AsyncResult<String>> completionHandler) { //根据identifier查找对应的 xxFactory，查找不到使用默认JavaVerticleFactory List<VerticleFactory> verticleFactories = resolveFactories(identifier); Iterator<VerticleFactory> iter = verticleFactories.iterator(); doDeployVerticle(iter, null, identifier, deploymentID, options, parentContext, callingContext, cl, completionHandler); } private void doDeployVerticle(Iterator<VerticleFactory> iter, Throwable prevErr, String identifier, String deploymentID, DeploymentOptions options, ContextImpl parentContext, ContextImpl callingContext, ClassLoader cl, Handler<AsyncResult<String>> completionHandler) { if (iter.hasNext()) { //是否解析,default false ... //执行部署verticle逻辑 fut.setHandler(ar -> { Throwable err; if (ar.succeeded()) { //判断解析之后名称是否相等 ... if (verticleFactory.blockingCreate()) {//是否是阻塞创建 /**根据instances数量执行deploy*/ vertx.<Verticle[]>executeBlocking(createFut -> { try { Verticle[] verticles = createVerticles(verticleFactory, identifier, options.getInstances(), cl); createFut.complete(verticles); } catch (Exception e) { createFut.fail(e); } }, res -> { if (res.succeeded()) { doDeploy(identifier, deploymentID, options, parentContext, callingContext, completionHandler, cl, res.result()); } else { // 失败继续执行下一个 doDeployVerticle(iter, res.cause(), identifier, deploymentID, options, parentContext, callingContext, cl, completionHandler); } }); return; } else { try { /**根据instances数量执行deploy*/ Verticle[] verticles = createVerticles(verticleFactory, identifier, options.getInstances(), cl); doDeploy(identifier, deploymentID, options, parentContext, callingContext, completionHandler, cl, verticles); return; } catch (Exception e) { err = e; } } } } ... } /** * 根据instances数量初始化verticle实例 */ private Verticle[] createVerticles(VerticleFactory verticleFactory, String identifier, int instances, ClassLoader cl) throws Exception { Verticle[] verticles = new Verticle[instances]; for (int i = 0; i < instances; i++) { verticles[i] = verticleFactory.createVerticle(identifier, cl); if (verticles[i] == null) { throw new NullPointerException("VerticleFactory::createVerticle returned null"); } } return verticles; } private void doDeploy(String identifier, String deploymentID, DeploymentOptions options, ContextImpl parentContext, ContextImpl callingContext, Handler<AsyncResult<String>> completionHandler, ClassLoader tccl, Verticle... verticles) { // Copy一份副本 JsonObject conf = options.getConfig() == null ? new JsonObject() : options.getConfig().copy(); String poolName = options.getWorkerPoolName();//获取定义的worker Pool 名称 Deployment parent = parentContext.getDeployment(); DeploymentImpl deployment = new DeploymentImpl(parent, deploymentID, identifier, options); AtomicInteger deployCount = new AtomicInteger(); AtomicBoolean failureReported = new AtomicBoolean(); /**根据instances verticle 数量执行多实例，利用CPU多核心*/ for (Verticle verticle: verticles) { /** * 三种context类型，默认Standard * Standard Verticles(eventloop) * Worker Verticles(DeploymentOptions_workerPoolName & DeploymentOptions_workerPoolSize & DeploymentOptions_worker) * Multi-threaded worker verticles(worker Verticles 基础上 & DeploymentOptions_multiThreaded) */ WorkerExecutorImpl workerExec = poolName != null ? vertx.createSharedWorkerExecutor(poolName, options.getWorkerPoolSize(), options.getMaxWorkerExecuteTime()) : null; WorkerPool pool = workerExec != null ? workerExec.getPool() : null; ContextImpl context = options.isWorker() ? vertx.createWorkerContext(options.isMultiThreaded(), deploymentID, pool, conf, tccl) : vertx.createEventLoopContext(deploymentID, pool, conf, tccl); if (workerExec != null) {//使用worker verticle 添加Close Hook context.addCloseHook(workerExec); } //绑定当前context context.setDeployment(deployment); deployment.addVerticle(new VerticleHolder(verticle, context)); //执行deploy context.runOnContext(v -> { try { //verticle初始化 verticle.init(vertx, context); Future<Void> startFuture = Future.future(); //调用deploy verticle的start 方法 verticle.start(startFuture); //deployVerticle 调用complete方法的回调处理 startFuture.setHandler(ar -> { if (ar.succeeded()) { if (parent != null) {//parentVericl不为null,绑定父子映射关系 if (parent.addChild(deployment)) { deployment.child = true; } else { // Orphan deployment.undeploy(null); return; } } VertxMetrics metrics = vertx.metricsSPI();//初始化verticle metrics if (metrics != null) { metrics.verticleDeployed(verticle); } deployments.put(deploymentID, deployment);//添加集合中 //实例数量是否全部部署成功 if (deployCount.incrementAndGet() == verticles.length) { reportSuccess(deploymentID, callingContext, completionHandler); } } else if (failureReported.compareAndSet(false, true)) {//部署失败 deployment.rollback(callingContext, completionHandler, context, ar.cause()); } }); } catch (Throwable t) { if (failureReported.compareAndSet(false, true)) deployment.rollback(callingContext, completionHandler, context, t); } }); } }
Verticle Types
Verticle Types : 一、Standard Verticles、二、Worker Verticles、三、Multi-threaded worker verticles．
本质还是eventloop处理connection、read/write、encode/decode , 事件处理(eventHandler)在配置
何种类型的verticle相应的context处理 , 调度逻辑在VertxHandler类配置的context调度,
和vertx.executeBlocking->{...} 相同效果.Context Class diagram 如图:
DeploymentOptions
//添加配置,当前部署verticle共享配置 private JsonObject config; //是否使用WorkerContext private boolean worker; /** * 是否使用mutil workerContext,不推荐,通常使用eventloop或worker, * 运行是在worker pool不同线程执行，需考虑线程安全,如果使用将无法使用其他多数模块 */ private boolean multiThreaded; //隔离组配置,部署隔离相关配置，不推荐，并且JDK9+不支持 private String isolationGroup; //定义的worker pool名称前缀 private String workerPoolName; // 定义打worker pool线程数量 private int workerPoolSize; //定义最大worker poll 执行时间,Thread超过时间阀值输出level:warn报警 ,不配置默认 60s private long maxWorkerExecuteTime; //是否启用HA(高可用),默认false private boolean ha; //配置额外的Classpath路径,如果未设置isolationGroup 则忽略 private List<String> extraClasspath; //配置verticle 实例数量 private int instances; //配置隔离的类，路径为完全限定名，可使用通配符 * private List<String> isolatedClasses;
