Es source code reading (I) "suggestions collection"

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Start process analysis :

entrance :org.elasticsearch.bootstrap.Elasticsearch->org.elasticsearch.bootstrap.Bootstrap->

Build instance -> Write process number -> Initialize configuration file -> Initialize the setting instance -> function -> Turn off processing

In the process of initializing and setting the instance Initialize with the initialized configuration file node example , And set the closing processing . Initializing node In the process , Initializing is InternalNode example . Among them start In the method Use guice frame , Load different modules . First load Discovery.class example , Then set its routing service . According to the configuration, you can generate LocalDiscovery and ZenDiscovery. Then initialize MappingUpdateAction. Start the related thread . Then load... In turn :IndicesService, and IndexingMemoryController,IndicesClusterStateService,IndicesTTLService RiversManager,SnapshotsService, TransportService Start a series of worker threads . ClusterService ,RoutingService,SearchService,MonitorService,RestController.

LocalGatewayAllocator initialization

start-up DiscoveryService Start the related thread , initialization GatewayService, start-up HTTPServer Start the related thread , initialization BulkUdpService, initialization ResourceWatcherService, initialization TribeService All the above components are set to the startup state .

When Es When processing a request , Relevant... Will be created according to the request EVENT, Then relate it to a series of listener The combination is handed over to the thread pool for execution , Total execution process , Will traverse each listener, The parameter passed is Event, Then do something about it .

Next, we will analyze the source code in combination with the actual instance when creating the index .

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