elasticsearch 怎么用源码启动调试

发布网友发布时间：2022-04-24 05:54

共1个回答

热心网友时间：2023-10-04 05:24

脚本内容不再赘述，java主类位于org.elasticsearch.bootstrap。主要逻辑是生成了一个InternalNode节点，并且启动了一个keepalive线程。结点的启动代表整个es进程启动了。
InternalNode节点是通过NodeBuilder来生成的，节点在构造函数中通过MoleBuilder类来进行模块的注入（是对Guice的一个封装而已），同时生成injector实例，如下

MolesBuilder moles = new MolesBuilder();
moles.add(new Version.Mole(version));
moles.add(new CacheRecyclerMole(settings));
moles.add(new PageCacheRecyclerMole(settings));
moles.add(new BigArraysMole(settings));
moles.add(new PluginsMole(settings, pluginsService));
moles.add(new SettingsMole(settings));
moles.add(new NodeMole(this));
moles.add(new NetworkMole());
moles.add(new ScriptMole(settings));
moles.add(new EnvironmentMole(environment));
moles.add(new NodeEnvironmentMole(nodeEnvironment));
moles.add(new ClusterNameMole(settings));
moles.add(new ThreadPoolMole(settings));
moles.add(new DiscoveryMole(settings));
moles.add(new ClusterMole(settings));
moles.add(new RestMole(settings));
moles.add(new TransportMole(settings));
if (settings.getAsBoolean("http.enabled", true)) {
moles.add(new HttpServerMole(settings));
}
moles.add(new RiversMole(settings));
moles.add(new IndicesMole(settings));
moles.add(new SearchMole());
moles.add(new ActionMole(false));
moles.add(new MonitorMole(settings));
moles.add(new GatewayMole(settings));
moles.add(new NodeClientMole());
moles.add(new BulkUdpMole());
moles.add(new ShapeMole());
moles.add(new PercolatorMole());
moles.add(new ResourceWatcherMole());
moles.add(new RepositoriesMole());
moles.add(new TribeMole());
injector = moles.createInjector();

在InternalNode的start方法中，用injector对各个模块完成启动，各自负责各自的功能，如下：

injector.getInstance(Discovery.class).setAllocationService(injector.getInstance(AllocationService.class));

for (Class<? extends LifecycleComponent> plugin : pluginsService.services()) {
injector.getInstance(plugin).start();
}

injector.getInstance(MappingUpdatedAction.class).start();
injector.getInstance(IndicesService.class).start();
injector.getInstance(IndexingMemoryController.class).start();
injector.getInstance(IndicesClusterStateService.class).start();
injector.getInstance(IndicesTTLService.class).start();
injector.getInstance(RiversManager.class).start();
injector.getInstance(SnapshotsService.class).start();
injector.getInstance(ClusterService.class).start();
injector.getInstance(RoutingService.class).start();
injector.getInstance(SearchService.class).start();
injector.getInstance(MonitorService.class).start();
injector.getInstance(RestController.class).start();
injector.getInstance(TransportService.class).start();
DiscoveryService discoService = injector.getInstance(DiscoveryService.class).start();
discoService.waitForInitialState();

// gateway should start after disco, so it can try and recovery from gateway on "start"
injector.getInstance(GatewayService.class).start();

if (settings.getAsBoolean("http.enabled", true)) {
injector.getInstance(HttpServer.class).start();
}
injector.getInstance(BulkUdpService.class).start();
injector.getInstance(ResourceWatcherService.class).start();
injector.getInstance(TribeService.class).start();

至此，es进程启动完毕。

guice相关介绍可以参见以下链接：
关键点在于：
@inject注释---guice会扫描inject注释，并对方法中出现的参数实例寻找对应注册的实例进行初始化。

热心网友时间：2023-10-04 05:24

elasticsearch 怎么用源码启动 调试

elasticsearch 怎么用源码启动调试