SolrCloud-4.10.2源代码启动流程梳理

SolrCloud-4.10.2源代码

web.xml中filter配置 SolrDispatchFilter

<filter-name>SolrRequestFilter</filter-name>
<filter-class>org.apache.solr.servlet.SolrDispatchFilter</filter-class>

SolrRequestFilter继承自Filter，实例化的时候对调用init()方法

this.cores = createCoreContainer();

关键代码

SolrDispatchFilter.execute()
handler = core.getRequestHandler( path )

solrconfig.xml配置的Handler，这里有些handler是不能配置的 比如admin

cat solrconfig.xml |grep 'name="/'
<requestHandler name="/select" class="solr.SearchHandler">
<requestHandler name="/query" class="solr.SearchHandler">
<requestHandler name="/dataimport" class="org.apache.solr.handler.dataimport.DataImportHandler">  
<requestHandler name="/get" class="solr.RealTimeGetHandler">
<requestHandler name="/browse" class="solr.SearchHandler">
<requestHandler name="/update" class="solr.UpdateRequestHandler">
<requestHandler name="/update/json" class="solr.UpdateRequestHandler">
<requestHandler name="/update/csv" class="solr.UpdateRequestHandler">
<requestHandler name="/update/extract" 
<requestHandler name="/analysis/field" 
<requestHandler name="/analysis/document" 
<requestHandler name="/admin/" 
<requestHandler name="/admin/luke"       class="solr.admin.LukeRequestHandler" />
<requestHandler name="/admin/system"     class="solr.admin.SystemInfoHandler" />
<requestHandler name="/admin/plugins"    class="solr.admin.PluginInfoHandler" />
<requestHandler name="/admin/threads"    class="solr.admin.ThreadDumpHandler" />
<requestHandler name="/admin/properties" class="solr.admin.PropertiesRequestHandler" />
<requestHandler name="/admin/file"       class="solr.admin.ShowFileRequestHandler" >
<requestHandler name="/admin/file" 
<requestHandler name="/admin/ping" class="solr.PingRequestHandler">
<requestHandler name="/debug/dump" class="solr.DumpRequestHandler" >
<requestHandler name="/replication" class="solr.ReplicationHandler" > 
<requestHandler name="/spell" class="solr.SearchHandler" startup="lazy">
<requestHandler name="/suggest" class="solr.SearchHandler" startup="lazy">
<requestHandler name="/tvrh" class="solr.SearchHandler" startup="lazy">
<requestHandler name="/clustering"
<requestHandler name="/terms" class="solr.SearchHandler" startup="lazy">
<requestHandler name="/elevate" class="solr.SearchHandler" startup="lazy">

执行逻辑主要逻辑

this.execute( req, handler, solrReq, solrRsp );
    sreq.getContext().put( "webapp", req.getContextPath() );
    sreq.getCore().execute( handler, sreq, rsp );
         handler.handleRequest(req,rsp);
         RequestHandlerBase
              handleRequestBody( req, rsp );