[代码]solrcloud中 SolrCore 初始化_solr filecore目录如何初始化-优快云博客

本文链接：https://blog.youkuaiyun.com/porui/article/details/9255373

本文详细介绍了 Solr 的初始化过程，包括监听器设置、索引删除策略、索引初始化、搜索组件配置、更新处理链创建及搜索器初始化等内容。特别关注了 updateProcessChain 的组成部分及其在处理更新请求中的作用。

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SolrCore init

The main procedure list as above.
1. initListeners() : the listeners is defined in the solrconfig.xml. for defaute there are tow seaerch listeners:

< listener event = "newSearcher" class = "solr.QuerySenderListener" >

< arr name = "queries" >

<!--

<lst><str name="q">solr</str><str name="sort">price asc</str></lst>

<lst><str name="q">rocks</str><str name="sort">weight asc</str></lst>

-->

</ arr >

</ listener >

< listener event = "firstSearcher" class = "solr.QuerySenderListener" >

< arr name = "queries" >

< lst >

< str name = "q" >static firstSearcher warming in solrconfig.xml</ str >

</ lst >

</ arr >

</ listener >

you can define other event listeners

2. initDeletionPolicy

3. initIndex: here, the indexWriter will be initialized according to the config info

4. searchComponents: init the search component defined in the solrconfig.xml

5. updateProcessChain: new a updateProcessChain. this Chain contain a list of updateProcessorFactory. the processor chain wouldn't create here. just the Factory initialized. thisProcessorChain is the most importante part in the updateRequest processing. It contain 3 processor now(LogUpdateProcessor, DistributedUpdateProceeor and RunUpdateProcessor). there will be a detail introduction of processorChain in next post.

6. getSearcher: init searcher predefined in the solrconfig.xml

7. create UpdateHandler: this updateHandler is defaute directUpdateHandler2. class directUpdateHandler2 direct process local update request. this class invoked byRunUpdateProcessor