cache user search results

scm-webapp/src/main/java/sonia/scm/api/rest/resources/SearchResource.java

@@ -41,10 +41,17 @@ import com.google.inject.Inject;
 import com.google.inject.Provider;
 import com.google.inject.Singleton;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import sonia.scm.HandlerEvent;
 import sonia.scm.api.rest.SearchResult;
 import sonia.scm.api.rest.SearchResults;
+import sonia.scm.cache.Cache;
+import sonia.scm.cache.CacheManager;
 import sonia.scm.search.SearchRequest;
 import sonia.scm.user.User;
+import sonia.scm.user.UserListener;
 import sonia.scm.user.UserManager;
 import sonia.scm.util.SecurityUtil;
 import sonia.scm.util.Util;
@@ -55,7 +62,6 @@ import sonia.scm.web.security.WebSecurityContext;
 import java.util.Collection;
 
 import javax.ws.rs.GET;
-import javax.ws.rs.POST;
 import javax.ws.rs.Path;
 import javax.ws.rs.QueryParam;
 import javax.ws.rs.WebApplicationException;
@@ -67,26 +73,52 @@ import javax.ws.rs.core.Response.Status;
  */
 @Singleton
 @Path("search")
-public class SearchResource
+public class SearchResource implements UserListener
 {
 
+  /** Field description */
+  public static final String CACHE_USER = "sonia.cache.search.users";
+
+  /** the logger for SearchResource */
+  private static final Logger logger =
+    LoggerFactory.getLogger(SearchResource.class);
+
+  //~--- constructors ---------------------------------------------------------
+
   /**
    * Constructs ...
    *
    *
    * @param securityContextProvider
    * @param userManager
+   * @param cacheManager
    */
   @Inject
   public SearchResource(Provider<WebSecurityContext> securityContextProvider,
-                        UserManager userManager)
+                        UserManager userManager, CacheManager cacheManager)
   {
     this.securityContextProvider = securityContextProvider;
     this.userManager = userManager;
+    this.userManager.addListener(this);
+    this.userSearchCache = cacheManager.getCache(String.class,
+            SearchResults.class, CACHE_USER);
   }
 
   //~--- methods --------------------------------------------------------------
 
+  /**
+   * Method description
+   *
+   *
+   * @param user
+   * @param event
+   */
+  @Override
+  public void onEvent(User user, HandlerEvent event)
+  {
+    userSearchCache.clear();
+  }
+
   /**
    * Method description
    *
@@ -106,18 +138,22 @@ public class SearchResource
       throw new WebApplicationException(Status.BAD_REQUEST);
     }
 
+    SearchResults result = userSearchCache.get(queryString);
+
+    if (result == null)
+    {
       SearchRequest request = new SearchRequest(queryString, true);
 
       request.setMaxResults(5);
 
       Collection<User> users = userManager.search(request);
-    SearchResults result = new SearchResults();
+
+      result = new SearchResults();
 
       if (Util.isNotEmpty(users))
       {
-      Collection<SearchResult> resultCollection = Collections2.transform(users,
-                                                    new Function<User,
-                                                      SearchResult>()
+        Collection<SearchResult> resultCollection =
+          Collections2.transform(users, new Function<User, SearchResult>()
         {
           @Override
           public SearchResult apply(User user)
@@ -128,6 +164,12 @@ public class SearchResource
 
         result.setSuccess(true);
         result.setResults(resultCollection);
+        userSearchCache.put(queryString, result);
+      }
+    }
+    else if (logger.isDebugEnabled())
+    {
+      logger.debug("return searchresults for {} from cache", queryString);
     }
 
     return result;
@@ -140,4 +182,7 @@ public class SearchResource
 
   /** Field description */
   private UserManager userManager;
+
+  /** Field description */
+  private Cache<String, SearchResults> userSearchCache;
 }

scm-webapp/src/main/java/sonia/scm/user/xml/XmlUserManager.java

@@ -335,6 +335,11 @@ public class XmlUserManager extends AbstractUserManager
   @Override
   public Collection<User> search(final SearchRequest searchRequest)
   {
+    if (logger.isDebugEnabled())
+    {
+      logger.debug("search user with query {}", searchRequest.getQuery());
+    }
+
     List<User> users = new ArrayList<User>();
     int index = 0;
     int counter = 0;

scm-webapp/src/main/resources/config/ehcache.xml

@@ -90,10 +90,10 @@
   <defaultCache
         maxElementsInMemory="20000"
         eternal="false"
-        overflowToDisk="true"
+        overflowToDisk="false"
         timeToIdleSeconds="1200"
         timeToLiveSeconds="2400"
-        diskPersistent="true"
+        diskPersistent="false"
         diskExpiryThreadIntervalSeconds="2400"
   />
 
@@ -107,17 +107,6 @@
         diskPersistent="false"
   />
 
-  <cache
-        name="sonia.cache.repository"
-        maxElementsInMemory="20000"
-        eternal="false"
-        overflowToDisk="true"
-        timeToIdleSeconds="1200"
-        timeToLiveSeconds="2400"
-        diskPersistent="false"
-        diskExpiryThreadIntervalSeconds="2400"
-  />
-
   <cache
         name="sonia.cache.plugins"
         maxElementsInMemory="10"
@@ -127,4 +116,13 @@
         diskPersistent="false"
   />
 
+  <cache
+        name="sonia.cache.search.users"
+        maxElementsInMemory="10000"
+        eternal="false"
+        overflowToDisk="false"
+        timeToLiveSeconds="5400"
+        diskPersistent="false"
+  />
+
 </ehcache>