SOLR-204: Make it possible for the request dispatcher to handle /select. This offers uniform error handling for /update and /select.

This change will affect anyone who has added "enableRemoteStreaming" to their solrconfig.xml since solr1.1

Where you had:
<requestParsers enableRemoteStreaming="false" multipartUploadLimitInKB="2048" /> 

You now need:
<requestDispatcher handleSelect="true" >
  <requestParsers enableRemoteStreaming="false" multipartUploadLimitInKB="2048" />
</requestDispatcher>



git-svn-id: https://svn.apache.org/repos/asf/lucene/solr/trunk@533558 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -152,6 +152,12 @@ New Features
     solr using the standard request/response formats, but does not require
     an HTTP connection.  It is designed for embedded applications. (ryan)    
 
+25. SOLR-204: The request dispatcher (added in SOLR-104) can handle
+    calls to /select.  This offers uniform error handling for /update and 
+    /select.  To enable this behavior, you must add:
+      <requestDispatcher handleSelect="true" > to your solrconfig.xml
+    See the example solrconfig.xml for details.  (ryan)
+    
 Changes in runtime behavior
  1. Highlighting using DisMax will only pick up terms from the main 
     user query, not boost or filter queries (klaas).

example/solr/conf/solrconfig.xml

@@ -231,8 +231,16 @@
 
   </query>
 
+  <!-- 
+    Let the dispatch filter handler /select?qt=XXX
+    handleSelect=true will use consistent error handling for /select and /update
+    handleSelect=false will use solr1.1 style error formatting
+    -->
+  <requestDispatcher handleSelect="true" >
     <!--Make sure your system has some authentication before enabling remote streaming!  -->
     <requestParsers enableRemoteStreaming="false" multipartUploadLimitInKB="2048" />
+  </requestDispatcher>
+  
       
   <!-- requestHandler plugins... incoming queries will be dispatched to the
      correct handler based on the qt (query type) param matching the

src/test/test-files/solr/conf/solrconfig.xml

@@ -267,7 +267,9 @@
   </requestHandler>
 
   <!-- enable streaming for testing... -->
+  <requestDispatcher handleSelect="true" >
     <requestParsers enableRemoteStreaming="true" multipartUploadLimitInKB="2048" />
+  </requestDispatcher>
 
   <admin>
     <defaultQuery>solr</defaultQuery>

src/webapp/WEB-INF/web.xml

@@ -35,10 +35,6 @@
     <filter-name>SolrRequestFilter</filter-name>
     <filter-class>org.apache.solr.servlet.SolrDispatchFilter</filter-class>
     <!--
-    <init-param>
-      <param-name>handle-select</param-name>
-      <param-value>true</param-value>
-    </init-param>
     <init-param>
       <param-name>path-prefix</param-name>
       <param-value>/xxx</param-value>

src/webapp/src/org/apache/solr/servlet/SolrDispatchFilter.java

@@ -60,7 +60,10 @@ public class SolrDispatchFilter implements Filter
     try {
       // web.xml configuration
       this.pathPrefix = config.getInitParameter( "path-prefix" );
-      this.handleSelect = "true".equals( config.getInitParameter( "handle-select" ) );
+      
+      // Let this filter take care of /select?xxx format
+      this.handleSelect = 
+        SolrConfig.config.getBool( "requestDispatcher/@handleSelect", false ); 
       
       log.info("user.dir=" + System.getProperty("user.dir"));
       core = SolrCore.getSolrCore();

src/webapp/src/org/apache/solr/servlet/SolrRequestParsers.java

@@ -32,12 +32,12 @@ import java.util.Map;
 import java.util.logging.Logger;
 
 import javax.servlet.http.HttpServletRequest;
-import javax.xml.xpath.XPathConstants;
 
 import org.apache.commons.fileupload.FileItem;
 import org.apache.commons.fileupload.disk.DiskFileItemFactory;
 import org.apache.commons.fileupload.servlet.ServletFileUpload;
 import org.apache.solr.core.Config;
+import org.apache.solr.core.SolrConfig;
 import org.apache.solr.core.SolrCore;
 import org.apache.solr.core.SolrException;
 import org.apache.solr.util.ContentStream;
@@ -47,9 +47,6 @@ import org.apache.solr.request.SolrParams;
 import org.apache.solr.request.SolrQueryRequest;
 import org.apache.solr.request.SolrQueryRequestBase;
 import org.apache.solr.util.ContentStreamBase;
-import org.w3c.dom.NamedNodeMap;
-import org.w3c.dom.Node;
-import org.w3c.dom.NodeList;
 
 
 public class SolrRequestParsers 
@@ -71,20 +68,12 @@ public class SolrRequestParsers
   {
     this.core = core;
     
-    long uploadLimitKB = 2000; // 2MB default
+    // Read the configuration
-    NodeList nodes = (NodeList)config.evaluate("requestParsers", XPathConstants.NODESET);
+    long uploadLimitKB = SolrConfig.config.getInt( 
-      if( nodes!=null && nodes.getLength()>0 ) {
+        "requestDispatcher/requestParsers/@multipartUploadLimitInKB", 2000 ); // 2MB default
-          // only look at the first node.  
+    
-        NamedNodeMap attrs = nodes.item(0).getAttributes();
+    this.enableRemoteStreams = SolrConfig.config.getBool( 
-        Node node = attrs.getNamedItem( "enableRemoteStreaming" );
+        "requestDispatcher/requestParsers/@enableRemoteStreaming", false ); 
-        if( node != null ) {
-          enableRemoteStreams = Boolean.parseBoolean( node.getTextContent() );
-        }
-        node = attrs.getNamedItem( "multipartUploadLimitInKB" );
-        if( node != null ) {
-          uploadLimitKB = Long.parseLong( node.getTextContent() );
-        }
-      }
         
     MultipartRequestParser multi = new MultipartRequestParser( uploadLimitKB );
     RawRequestParser raw = new RawRequestParser();
@@ -394,3 +383,5 @@ class StandardRequestParser implements SolrRequestParser
 
 
 
+
+