I'm getting:

HTTP ERROR: 500

PWC6033: Unable to compile class for JSP

PWC6197: An error occurred at line: 50 in the jsp file: /admin/index.jsp
PWC6199: Generated servlet error:
The method getRegistry() is undefined for the type MultiCore


RequestURI=/solr/admin/
Caused by:

org.apache.jasper.JasperException: PWC6033: Unable to compile class for JSP

PWC6197: An error occurred at line: 50 in the jsp file: /admin/index.jsp
PWC6199: Generated servlet error:
The method getRegistry() is undefined for the type MultiCore


at org .apache .jasper .compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:94)



Looks like getRegistry() was removed. I'm not sure on the replacement, just yet, but can look into it if no one else sees it right off hand..

-Grant

On Mar 9, 2008, at 3:29 PM, [EMAIL PROTECTED] wrote:

Author: ryan
Date: Sun Mar  9 12:29:04 2008
New Revision: 635334

URL: http://svn.apache.org/viewvc?rev=635334&view=rev
Log:
SOLR-350 -- make MultiCore subclassable so to allow custom persistance methods (for example, SQL)

Added:
   lucene/solr/trunk/src/java/org/apache/solr/core/SolrMultiCore.java
Modified:
lucene/solr/trunk/client/java/solrj/src/org/apache/solr/client/ solrj/embedded/EmbeddedSolrServer.java lucene/solr/trunk/client/java/solrj/test/org/apache/solr/client/ solrj/MultiCoreExampleTestBase.java lucene/solr/trunk/client/java/solrj/test/org/apache/solr/client/ solrj/embedded/MultiCoreEmbeddedTest.java
   lucene/solr/trunk/src/java/org/apache/solr/core/MultiCore.java
   lucene/solr/trunk/src/java/org/apache/solr/core/SolrConfig.java
   lucene/solr/trunk/src/java/org/apache/solr/core/SolrCore.java
lucene/solr/trunk/src/java/org/apache/solr/handler/admin/ MultiCoreHandler.java lucene/solr/trunk/src/webapp/src/org/apache/solr/servlet/ SolrDispatchFilter.java

Modified: lucene/solr/trunk/client/java/solrj/src/org/apache/solr/ client/solrj/embedded/EmbeddedSolrServer.java
URL: 
http://svn.apache.org/viewvc/lucene/solr/trunk/client/java/solrj/src/org/apache/solr/client/solrj/embedded/EmbeddedSolrServer.java?rev=635334&r1=635333&r2=635334&view=diff
= = = = = = = = ====================================================================== --- lucene/solr/trunk/client/java/solrj/src/org/apache/solr/client/ solrj/embedded/EmbeddedSolrServer.java (original) +++ lucene/solr/trunk/client/java/solrj/src/org/apache/solr/client/ solrj/embedded/EmbeddedSolrServer.java Sun Mar 9 12:29:04 2008
@@ -54,22 +54,31 @@
  protected ModifiableSolrParams _invariantParams;
  protected ResponseParser _processor;

-  protected final SolrCore core;
+  protected final MultiCore multicore; // either multicore
+  protected final SolrCore core; // or single core
  protected final SolrRequestParsers parser;
  protected final String coreName;  // use MultiCore registry

  public EmbeddedSolrServer( SolrCore core )
  {
+    if ( core == null ) {
+      throw new NullPointerException("SolrCore instance required");
+    }
    this.core = core;
+    this.multicore = null;
    this.coreName = null;
    this.parser = init();
  }

-  public EmbeddedSolrServer( String coreName )
+  public EmbeddedSolrServer(  MultiCore multicore, String coreName )
  {
+    if ( multicore == null ) {
+      throw new NullPointerException("MultiCore instance required");
+    }
    this.core = null;
+    this.multicore = multicore;
    this.coreName = coreName;
-    SolrCore c = MultiCore.getRegistry().getCore( coreName );
+    SolrCore c = multicore.getCore( coreName );
    if( c == null ) {
      throw new RuntimeException( "Unknown core: "+coreName );
    }
@@ -96,7 +105,6 @@
    }

    // Check for multicore action
-    MultiCore multicore = MultiCore.getRegistry();
    SolrCore core = this.core;
    if( core == null ) {
      core = multicore.getCore( coreName );
@@ -126,7 +134,7 @@
      }
      // Perhaps the path is to manage the cores
      if( handler == null &&
-          coreName != null &&
+          multicore != null &&
          path.equals( multicore.getAdminPath() ) &&
          multicore.isEnabled() ) {
        handler = multicore.getMultiCoreHandler();

Modified: lucene/solr/trunk/client/java/solrj/test/org/apache/solr/ client/solrj/MultiCoreExampleTestBase.java
URL: 
http://svn.apache.org/viewvc/lucene/solr/trunk/client/java/solrj/test/org/apache/solr/client/solrj/MultiCoreExampleTestBase.java?rev=635334&r1=635333&r2=635334&view=diff
= = = = = = = = ====================================================================== --- lucene/solr/trunk/client/java/solrj/test/org/apache/solr/client/ solrj/MultiCoreExampleTestBase.java (original) +++ lucene/solr/trunk/client/java/solrj/test/org/apache/solr/client/ solrj/MultiCoreExampleTestBase.java Sun Mar 9 12:29:04 2008
@@ -25,7 +25,7 @@
import org.apache.solr.client.solrj.request.UpdateRequest.ACTION;
import org.apache.solr.client.solrj.response.MultiCoreResponse;
import org.apache.solr.common.SolrInputDocument;
-import org.apache.solr.core.SolrCore;
+import org.apache.solr.core.MultiCore;


/**
@@ -34,6 +34,9 @@
 */
public abstract class MultiCoreExampleTestBase extends SolrExampleTestBase
{
+  @SuppressWarnings("deprecation")
+ protected static final MultiCore multicore = org.apache.solr.core.SolrMultiCore.getInstance();
+
@Override public String getSolrHome() { return "../../../example/ multicore/"; }

@Override public String getSchemaFile() { return getSolrHome() +"core0/conf/schema.xml"; }

Modified: lucene/solr/trunk/client/java/solrj/test/org/apache/solr/ client/solrj/embedded/MultiCoreEmbeddedTest.java
URL: 
http://svn.apache.org/viewvc/lucene/solr/trunk/client/java/solrj/test/org/apache/solr/client/solrj/embedded/MultiCoreEmbeddedTest.java?rev=635334&r1=635333&r2=635334&view=diff
= = = = = = = = ====================================================================== --- lucene/solr/trunk/client/java/solrj/test/org/apache/solr/client/ solrj/embedded/MultiCoreEmbeddedTest.java (original) +++ lucene/solr/trunk/client/java/solrj/test/org/apache/solr/client/ solrj/embedded/MultiCoreEmbeddedTest.java Sun Mar 9 12:29:04 2008
@@ -21,7 +21,6 @@

import org.apache.solr.client.solrj.MultiCoreExampleTestBase;
import org.apache.solr.client.solrj.SolrServer;
-import org.apache.solr.core.MultiCore;

/**
 * This runs SolrServer test using
@@ -37,24 +36,24 @@

    File home = new File( getSolrHome() );
    File f = new File( home, "multicore.xml" );
-    MultiCore.getRegistry().load( getSolrHome(), f );
+    multicore.load( getSolrHome(), f );
  }

  @Override
  protected SolrServer getSolrCore0()
  {
-    return new EmbeddedSolrServer( "core0" );
+    return new EmbeddedSolrServer( multicore, "core0" );
  }

  @Override
  protected SolrServer getSolrCore1()
  {
-    return new EmbeddedSolrServer( "core1" );
+    return new EmbeddedSolrServer( multicore, "core1" );
  }

  @Override
  protected SolrServer getSolrAdmin()
  {
-    return new EmbeddedSolrServer( "core0" );
+    return new EmbeddedSolrServer( multicore, "core0" );
  }
}

Modified: lucene/solr/trunk/src/java/org/apache/solr/core/ MultiCore.java
URL: 
http://svn.apache.org/viewvc/lucene/solr/trunk/src/java/org/apache/solr/core/MultiCore.java?rev=635334&r1=635333&r2=635334&view=diff
= = = = = = = = ====================================================================== --- lucene/solr/trunk/src/java/org/apache/solr/core/MultiCore.java (original) +++ lucene/solr/trunk/src/java/org/apache/solr/core/MultiCore.java Sun Mar 9 12:29:04 2008
@@ -49,30 +49,33 @@
 */
public class MultiCore
{
- private static Logger log = Logger.getLogger(MultiCore.class.getName());
-  private static final MultiCore instance = new MultiCore();
+ protected static Logger log = Logger.getLogger(MultiCore.class.getName());

-  // Synchronized map of all cores
- private final Map<String, CoreDescriptor> cores = new LinkedHashMap<String, CoreDescriptor>(); + protected final Map<String, CoreDescriptor> cores = new LinkedHashMap<String, CoreDescriptor>();
+  protected boolean enabled = false;
+  protected boolean persistent = false;
+  protected String adminPath = null;
+  protected MultiCoreHandler multiCoreHandler = null;
+  protected File configFile = null;
+  protected String libDir = null;
+  protected ClassLoader libLoader = null;
+  protected SolrResourceLoader loader = null;
+  protected java.lang.ref.WeakReference<SolrCore> adminCore = null;

-  private boolean enabled = false;
-  private boolean persistent = false;
-  private String adminPath = null;
-  private MultiCoreHandler multiCoreHandler = null;
-  private File configFile = null;
-  private String libDir = null;
-  private ClassLoader libLoader = null;
-  private SolrResourceLoader loader = null;
-
-  // no one else can make the registry
-  private MultiCore() { }
+  public MultiCore() {
+  }

  //-------------------------------------------------------------------
  // Initialization / Cleanup
  //-------------------------------------------------------------------

  /**
-   * Load a config file listing the available solr cores
+   * Load a config file listing the available solr cores.
+   * @param dir the home directory of all resources.
+   * @param configFile the configuration file
+   * @throws javax.xml.parsers.ParserConfigurationException
+   * @throws java.io.IOException
+   * @throws org.xml.sax.SAXException
   */
public void load(String dir, File configFile ) throws ParserConfigurationException, IOException, SAXException {
    this.configFile = configFile;
@@ -94,7 +97,7 @@
      }

      if( adminPath != null ) {
-        multiCoreHandler = new MultiCoreHandler();
+        multiCoreHandler = this.createMultiCoreHandler();
      }

NodeList nodes = (NodeList)cfg.evaluate("multicore/core", XPathConstants.NODESET);
@@ -135,7 +138,9 @@
    enabled = true;
  }

-  /** Stops all cores. */
+  /**
+   * Stops all cores.
+   */
  public void shutdown() {
    synchronized(cores) {
      for(Map.Entry<String,CoreDescriptor> e : cores.entrySet()) {
@@ -154,15 +159,11 @@
    shutdown();
  }

-  //-------------------------------------------------------------------
-  //
-  //-------------------------------------------------------------------
-
-  /** Get the singleton */
-  public static MultiCore getRegistry() {
-    return instance;
-  }
-
+  /**
+   * Registers a SolrCore descriptor in the registry.
+   * @param descr the Solr core descriptor
+ * @return a previous descriptor having the same name if it existed, null otherwise
+   */
  public CoreDescriptor register( CoreDescriptor descr ) {
    if( descr == null ) {
      throw new RuntimeException( "Can not register a null core." );
@@ -186,6 +187,12 @@
    }
  }

+
+  /**
+   * Swaps two SolrCore descriptors.
+   * @param c0
+   * @param c1
+   */
  public void swap(CoreDescriptor c0, CoreDescriptor c1) {
    if( c0 == null || c1 == null ) {
      throw new RuntimeException( "Can not swap a null core." );
@@ -235,10 +242,11 @@
  }

  /**
+   * Recreates a SolrCore.
* While the new core is loading, requests will continue to be dispatched to
   * and processed by the old core
   *
-   * @param core
+   * @param core the SolrCore to reload
   * @throws ParserConfigurationException
   * @throws IOException
   * @throws SAXException
@@ -314,6 +322,49 @@
    this.adminPath = adminPath;
  }

+  /**
+   * Sets the preferred core used to handle MultiCore admin tasks.
+   * Note that getAdminCore is not symmetrical to this method since
+   * it will allways return an opened SolrCore.
+ * This however can be useful implementing a "metacore" (a core of cores).
+   */
+  public void setAdminCore(SolrCore core) {
+    adminCore = new java.lang.ref.WeakReference<SolrCore>(core);
+  }
+
+  /**
+ * Gets a core to handle MultiCore admin tasks (@see SolrDispatchFilter). + * This makes the best attempt to reuse the same opened SolrCore accross calls.
+   */
+  public SolrCore getAdminCore() {
+    SolrCore core = adminCore != null ? adminCore.get() : null;
+    if (core == null || core.isClosed()) {
+      for (CoreDescriptor descr : this.cores.values()) {
+        core = descr.getCore();
+        if (core == null || core.isClosed()) {
+          core = null;
+        } else {
+          break;
+        }
+      }
+      setAdminCore(core);
+    }
+    return core;
+  }
+
+  /**
+   * Creates a MultiCoreHandler for this MultiCore.
+   * @return a MultiCoreHandler
+   */
+  public MultiCoreHandler createMultiCoreHandler() {
+    return new MultiCoreHandler() {
+      @Override
+      public MultiCore getMultiCore() {
+        return MultiCore.this;
+      }
+    };
+  }
+
  public MultiCoreHandler getMultiCoreHandler() {
    return multiCoreHandler;
  }
@@ -439,4 +490,5 @@
      throw xforward;
    }
  }
+
}

Modified: lucene/solr/trunk/src/java/org/apache/solr/core/ SolrConfig.java
URL: 
http://svn.apache.org/viewvc/lucene/solr/trunk/src/java/org/apache/solr/core/SolrConfig.java?rev=635334&r1=635333&r2=635334&view=diff
= = = = = = = = ====================================================================== --- lucene/solr/trunk/src/java/org/apache/solr/core/SolrConfig.java (original) +++ lucene/solr/trunk/src/java/org/apache/solr/core/SolrConfig.java Sun Mar 9 12:29:04 2008
@@ -32,7 +32,6 @@
import java.util.Collection;
import java.util.HashSet;
import java.util.StringTokenizer;
-import java.util.logging.Logger;
import java.util.logging.Level;
import java.util.regex.Pattern;
import java.util.regex.Matcher;

Modified: lucene/solr/trunk/src/java/org/apache/solr/core/ SolrCore.java
URL: 
http://svn.apache.org/viewvc/lucene/solr/trunk/src/java/org/apache/solr/core/SolrCore.java?rev=635334&r1=635333&r2=635334&view=diff
= = = = = = = = ====================================================================== --- lucene/solr/trunk/src/java/org/apache/solr/core/SolrCore.java (original) +++ lucene/solr/trunk/src/java/org/apache/solr/core/SolrCore.java Sun Mar 9 12:29:04 2008
@@ -467,6 +467,10 @@
    }
  }

+  public boolean isClosed() {
+    return _searcher == null;
+  }
+
  @Override
  protected void finalize() { close(); }

@@ -926,7 +930,7 @@
    synchronized (searcherLock) {
      if (_searcher != null) {
        _searcher.decref();   // dec refcount for this._searcher
-        _searcher=null;
+        _searcher=null; // isClosed() does check this
        infoRegistry.remove("currentSearcher");
      }
    }

Added: lucene/solr/trunk/src/java/org/apache/solr/core/ SolrMultiCore.java
URL: 
http://svn.apache.org/viewvc/lucene/solr/trunk/src/java/org/apache/solr/core/SolrMultiCore.java?rev=635334&view=auto
= = = = = = = = ====================================================================== --- lucene/solr/trunk/src/java/org/apache/solr/core/ SolrMultiCore.java (added) +++ lucene/solr/trunk/src/java/org/apache/solr/core/ SolrMultiCore.java Sun Mar 9 12:29:04 2008
@@ -0,0 +1,47 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.solr.core;
+
+/**
+ * A MultiCore singleton.
+ * Marked as deprecated to avoid usage proliferation of core code that would + * assume MultiCore being a singleton. In solr 2.0, the MultiCore factory + * should be popluated with a standard tool like spring. Until then, this is
+ * a simple static factory that should not be used widely.
+ *
+ * @version $Id$
+ * @since solr 1.3
+ */
[EMAIL PROTECTED]
+public final class SolrMultiCore extends MultiCore
+{
+  private static MultiCore instance = null;
+
+  // no one else can make the registry
+  private SolrMultiCore() {}
+
+  /** Returns a default MultiCore singleton.
+   * @return
+   */
+  public static synchronized MultiCore getInstance() {
+    if (instance == null) {
+      instance = new SolrMultiCore();
+    }
+    return instance;
+  }
+}

Modified: lucene/solr/trunk/src/java/org/apache/solr/handler/admin/ MultiCoreHandler.java
URL: 
http://svn.apache.org/viewvc/lucene/solr/trunk/src/java/org/apache/solr/handler/admin/MultiCoreHandler.java?rev=635334&r1=635333&r2=635334&view=diff
= = = = = = = = ====================================================================== --- lucene/solr/trunk/src/java/org/apache/solr/handler/admin/ MultiCoreHandler.java (original) +++ lucene/solr/trunk/src/java/org/apache/solr/handler/admin/ MultiCoreHandler.java Sun Mar 9 12:29:04 2008
@@ -39,7 +39,7 @@
 * @version $Id$
 * @since solr 1.3
 */
-public class MultiCoreHandler extends RequestHandlerBase
+public abstract class MultiCoreHandler extends RequestHandlerBase
{
  public MultiCoreHandler()
  {
@@ -56,11 +56,18 @@
"it is a special Handler configured directly by the RequestDispatcher" );
  }

+  /**
+   * The instance of multicore this handler handles.
+   * This should be the MultiCore instance that created this handler.
+   * @return a MultiCore instance
+   */
+  public abstract MultiCore getMultiCore();
+
  @Override
public void handleRequestBody(SolrQueryRequest req, SolrQueryResponse rsp) throws Exception
  {
    // Make sure the manager is enabled
-    MultiCore manager = MultiCore.getRegistry();
+    MultiCore manager = getMultiCore();
    if( !manager.isEnabled() ) {
      throw new SolrException( SolrException.ErrorCode.BAD_REQUEST,
          "MultiCore support must be enabled at startup." );

Modified: lucene/solr/trunk/src/webapp/src/org/apache/solr/servlet/ SolrDispatchFilter.java
URL: 
http://svn.apache.org/viewvc/lucene/solr/trunk/src/webapp/src/org/apache/solr/servlet/SolrDispatchFilter.java?rev=635334&r1=635333&r2=635334&view=diff
= = = = = = = = ====================================================================== --- lucene/solr/trunk/src/webapp/src/org/apache/solr/servlet/ SolrDispatchFilter.java (original) +++ lucene/solr/trunk/src/webapp/src/org/apache/solr/servlet/ SolrDispatchFilter.java Sun Mar 9 12:29:04 2008
@@ -21,7 +21,6 @@
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
-import java.util.Collection;
import java.util.WeakHashMap;
import java.util.logging.Logger;
import java.util.logging.Level;
@@ -74,23 +73,12 @@
      this.pathPrefix = config.getInitParameter( "path-prefix" );
this.solrConfigFilename = config.getInitParameter("solrconfig- filename");

-      multicore = MultiCore.getRegistry();
-      if( multicore.isEnabled() ) {
-        log.info( "Using existing multicore configuration" );
-      }
-      else {
-        String instanceDir = SolrResourceLoader.locateInstanceDir();
-        File multiconfig = new File( instanceDir, "multicore.xml" );
- log.info( "looking for multicore.xml: "+multiconfig.getAbsolutePath() );
-        if( multiconfig.exists() ) {
-          multicore.load( instanceDir, multiconfig );
-        }
-      }
+      // multicore instantiation
+      this.multicore = initMultiCore(config);

+      if(multicore != null && multicore.isEnabled() ) {
      abortOnConfigurationError = false;
-      if( multicore.isEnabled() ) {
        singlecore = null;
-
        // if any core aborts on startup, then abort
        for( SolrCore c : multicore.getCores() ) {
if( c.getSolrConfig().getBool( "abortOnConfigurationError",false) ) {
@@ -100,11 +88,10 @@
        }
      }
      else {
-        if (this.solrConfigFilename==null) {
- singlecore = new SolrCore( null, null, new SolrConfig(), null );
-        } else {
- singlecore = new SolrCore( null, null, new SolrConfig(this.solrConfigFilename), null);
-        }
+ SolrConfig cfg = this.solrConfigFilename == null? new SolrConfig() : new SolrConfig(this.solrConfigFilename);
+        singlecore = new SolrCore( null, null, cfg, null );
+        abortOnConfigurationError = cfg.getBool(
+ "abortOnConfigurationError", abortOnConfigurationError);
      }
      log.info("user.dir=" + System.getProperty("user.dir"));
    }
@@ -123,10 +110,9 @@
out.println( "Check your log files for more detailed information on what may be wrong.\n" ); out.println( "If you want solr to continue after configuration errors, change: \n"); out.println( " <abortOnConfigurationError>false</ abortOnConfigurationError>\n" );
-      if( multicore.isEnabled() ) {
+      if (multicore != null && multicore.isEnabled()) {
        out.println( "in multicore.xml\n" );
-      }
-      else {
+      } else {
        out.println( "in solrconfig.xml\n" );
      }

@@ -148,24 +134,53 @@
    log.info("SolrDispatchFilter.init() done");
  }

+  /**
+   * Initializes the multicore instance.
+   * @param config the filter configuration
+   * @return the multicore instance or null
+   * @throws java.lang.Exception
+   */
+ protected MultiCore initMultiCore(FilterConfig config) throws Exception { + @SuppressWarnings("deprecation") // since SolrDispatchFilter can be derived & initMultiCore can be overriden + MultiCore mcore = org.apache.solr.core.SolrMultiCore.getInstance();
+    if (mcore.isEnabled()) {
+      log.info("Using existing multicore configuration");
+    } else {
+      // multicore load
+      String instanceDir = SolrResourceLoader.locateInstanceDir();
+      File fconf = new File(instanceDir, "multicore.xml");
+ log.info("looking for multicore.xml: " + fconf.getAbsolutePath());
+      if (fconf.exists()) {
+        mcore.load(instanceDir, fconf);
+      }
+    }
+    return mcore;
+  }
+
+
  public void destroy() {
+    if (multicore != null) {
    multicore.shutdown();
+      multicore = null;
+    }
    if( singlecore != null ) {
      singlecore.close();
+      singlecore = null;
    }
  }

- public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
-  {
+ public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    if( abortErrorMessage != null ) {
((HttpServletResponse)response).sendError( 500, abortErrorMessage );
      return;
    }

    if( request instanceof HttpServletRequest) {
-      SolrQueryRequest solrReq = null;
      HttpServletRequest req = (HttpServletRequest)request;
      HttpServletResponse resp = (HttpServletResponse)response;
+      SolrRequestHandler handler = null;
+      SolrQueryRequest solrReq = null;
+
      try {
        String path = req.getServletPath();
        if( req.getPathInfo() != null ) {
@@ -183,133 +198,118 @@
        }

// By default use the single core. If multicore is enabled, look for one.
-        SolrRequestHandler handler = null;
-        SolrCore core = singlecore;
-        if( core == null ) {
-          // Perhaps this is a multi-core admin page?
-          if( path.equals( "/" ) ) {
-            chain.doFilter(request, response);
-            return;
-          }
+        final SolrCore core;
+        if (multicore != null && multicore.isEnabled()) {
+          // if this is the multi-core admin page, it will handle it
          if( path.equals( multicore.getAdminPath() ) ) {
            handler = multicore.getMultiCoreHandler();
-
-            // pick a core to use for output
-            Collection<SolrCore> cores = multicore.getCores();
-            if( cores != null && cores.size() > 0 ) {
-              core = cores.iterator().next();
-            }
+            // pick a core to use for output generation
+            core = multicore.getAdminCore();
            if( core == null ) {
throw new RuntimeException( "Can not find a valid core for the multicore admin handler" );
            }
-          }
-          else {
+          } else {
+            //otherwise, we should find a core from the path
            idx = path.indexOf( "/", 1 );
-            if( idx <= 1 ) {
-              idx = path.length();
-            }
-
-            // try to get the corename as a request parameter first
-            String corename = path.substring( 1, idx );
-            path = path.substring( idx );
-            core = multicore.getCore( corename );
-
-            if( path.length() == 0 ) {
-              path = "/";
-            }
-
-            if( core == null ) {
- throw new SolrException( SolrException.ErrorCode.BAD_REQUEST, "unknown core: "+corename );
+            if( idx > 1 ) {
+              // try to get the corename as a request parameter first
+              String corename = path.substring( 1, idx );
+              path = path.substring( idx );
+              core = multicore.getCore( corename );
+            } else {
+              core = null;
            }
          }
        }
-
-        SolrRequestParsers parser = parsers.get( core );
-        if( parser == null ) {
-          parser = new SolrRequestParsers( core.getSolrConfig() );
-          parsers.put( core, parser );
-        }
-
-        // Only try to parse the handler *if* a valid core exists
- // when multi-core is enabled, the path can lead to a null core. - if( handler == null && path.length() > 1 ) { // don't match "" or "/" as valid path
-          handler = core.getRequestHandler( path );
-        }
-        if( handler == null && parser.isHandleSelect() ) {
- if( "/select".equals( path ) || "/ select/".equals( path ) ) {
-            solrReq = parser.parse( core, path, req );
-            String qt = solrReq.getParams().get( CommonParams.QT );
-            if( qt != null && qt.startsWith( "/" ) ) {
- throw new SolrException( SolrException.ErrorCode.BAD_REQUEST, "Invalid query type. Do not use /select to access: "+qt);
-            }
-            handler = core.getRequestHandler( qt );
-            if( handler == null ) {
- throw new SolrException( SolrException.ErrorCode.BAD_REQUEST, "unknown handler: "+qt);
-            }
-          }
+        else {
+          core = singlecore;
        }

-        if( handler != null ) {
-          if( solrReq == null ) {
-            solrReq = parser.parse( core, path, req );
+        // With a valid core...
+        if( core != null ) {
+          final SolrConfig config = core.getSolrConfig();
+          // get or create/cache the parser for the core
+          SolrRequestParsers parser = null;
+          parser = parsers.get(core);
+          if( parser == null ) {
+            parser = new SolrRequestParsers(config);
+            parsers.put( core, parser );
          }

-          final SolrConfig conf = core.getSolrConfig();
-          final Method reqMethod = Method.getMethod(req.getMethod());
-
-          if (Method.POST != reqMethod) {
-            HttpCacheHeaderUtil.setCacheControlHeader(conf, resp);
-          }
-
- // unless we have been explicitly told not to, do cache validation
-          if (!conf.getHttpCachingConfig().isNever304()) {
- // if we've confirmed cache validation, return immediately - if (HttpCacheHeaderUtil.doCacheHeaderValidation(solrReq, req,resp)) {
-              return;
+          // Determine the handler from the url path if not set
+          // (we might already have selected the multicore handler)
+ if( handler == null && path.length() > 1 ) { // don't match "" or "/" as valid path
+            handler = core.getRequestHandler( path );
+ // no handler yet but allowed to handle select; let's check
+            if( handler == null && parser.isHandleSelect() ) {
+ if( "/select".equals( path ) || "/ select/".equals( path ) ) {
+                solrReq = parser.parse( core, path, req );
+ String qt = solrReq.getParams().get( CommonParams.QT );
+                if( qt != null && qt.startsWith( "/" ) ) {
+ throw new SolrException( SolrException.ErrorCode.BAD_REQUEST, "Invalid query type. Do not use /select to access: "+qt);
+                }
+                handler = core.getRequestHandler( qt );
+                if( handler == null ) {
+ throw new SolrException( SolrException.ErrorCode.BAD_REQUEST, "unknown handler: "+qt);
+                }
+              }
            }
          }

-          SolrQueryResponse solrRsp = new SolrQueryResponse();
- /* even for HEAD requests, we need to execute the handler to - * ensure we don't get an error (and to make sure the correct
-           * QueryResponseWriter is selectedand we get the correct
-           * Content-Type)
-           */
-          this.execute( req, handler, solrReq, solrRsp );
-          if( solrRsp.getException() != null ) {
- sendError( (HttpServletResponse)response, solrRsp.getException() );
-            return;
-          }
-
-          // Now write it out
- QueryResponseWriter responseWriter = core.getQueryResponseWriter(solrReq); - response.setContentType(responseWriter.getContentType(solrReq, solrRsp));
-          if (Method.HEAD == Method.getMethod(req.getMethod())) {
- // nothing to write out, waited this long just to get ContentType
-            return;
+            // With a valid handler and a valid core...
+          if( handler != null ) {
+            // if not a /select, create the request
+            if( solrReq == null ) {
+              solrReq = parser.parse( core, path, req );
+            }
+
+ final Method reqMethod = Method.getMethod(req.getMethod());
+            if (Method.POST != reqMethod) {
+ HttpCacheHeaderUtil.setCacheControlHeader(config, resp);
+            }
+ // unless we have been explicitly told not to, do cache validation
+            // if we fail cache validation, execute the query
+            if (config.getHttpCachingConfig().isNever304() ||
+ ! HttpCacheHeaderUtil.doCacheHeaderValidation(solrReq, req, resp)) {
+                SolrQueryResponse solrRsp = new SolrQueryResponse();
+ /* even for HEAD requests, we need to execute the handler to + * ensure we don't get an error (and to make sure the correct + * QueryResponseWriter is selectedand we get the correct
+                 * Content-Type)
+                 */
+                this.execute( req, handler, solrReq, solrRsp );
+                if( solrRsp.getException() != null ) {
+ sendError( (HttpServletResponse)response, solrRsp.getException() );
+                }
+                else {
+                  // Now write it out
+ QueryResponseWriter responseWriter = core.getQueryResponseWriter(solrReq); + response.setContentType(responseWriter.getContentType(solrReq, solrRsp)); + if (Method.HEAD != Method.getMethod(req.getMethod())) {
+                  PrintWriter out = response.getWriter();
+                  responseWriter.write(out, solrReq, solrRsp);
+                }
+ //else http HEAD request, nothing to write out, waited this long just to get ContentType
+              }
+            }
+            return; // we are done with a valid handler
          }
-
-          PrintWriter out = response.getWriter();
-          responseWriter.write(out, solrReq, solrRsp);
-          return;
-        }
- // otherwise, let's ensure the core is in the SolrCore request attribute so
-        // the servlet/jsp can retrieve it
-        else {
-          req.setAttribute("org.apache.solr.SolrCore", core);
-
-          // Let each core have its own admin page...
-          if( singlecore == null && path.startsWith( "/admin" ) ) {
- req.getRequestDispatcher( path ).forward( request, response );
-            return;
+ // otherwise (we have a core), let's ensure the core is in the SolrCore request attribute so
+          // a servlet/jsp can retrieve it
+          else {
+            req.setAttribute("org.apache.solr.SolrCore", core);
+              // Modify the request so each core gets its own /admin
+            if( singlecore == null && path.startsWith( "/admin" ) ) {
+ req.getRequestDispatcher( path ).forward( request, response );
+              return;
+            }
          }
        }
-      }
-      catch( Throwable ex ) {
+ log.info("no handler or core retrieved for " + path + ", follow through...");
+      } catch (Throwable ex) {
        sendError( (HttpServletResponse)response, ex );
        return;
-      }
-      finally {
+      } finally {
        if( solrReq != null ) {
          solrReq.close();
        }
@@ -326,8 +326,7 @@
    sreq.getCore().execute( handler, sreq, rsp );
  }

- protected void sendError(HttpServletResponse res, Throwable ex) throws IOException
-  {
+ protected void sendError(HttpServletResponse res, Throwable ex) throws IOException {
    int code=500;
    String trace = "";
    if( ex instanceof SolrException ) {



--------------------------
Grant Ingersoll
http://www.lucenebootcamp.com
Next Training: April 7, 2008 at ApacheCon Europe in Amsterdam

Lucene Helpful Hints:
http://wiki.apache.org/lucene-java/BasicsOfPerformance
http://wiki.apache.org/lucene-java/LuceneFAQ





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