[
https://issues.apache.org/jira/browse/JENA-626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15022344#comment-15022344
]
ASF GitHub Bot commented on JENA-626:
-------------------------------------
Github user ajs6f commented on a diff in the pull request:
https://github.com/apache/jena/pull/95#discussion_r45620403
--- Diff:
jena-fuseki2/jena-fuseki-core/src/main/java/org/apache/jena/fuseki/servlets/SPARQL_Query_Cache.java
---
@@ -0,0 +1,249 @@
+/*
+ * 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.jena.fuseki.servlets;
+
+import org.apache.jena.atlas.io.IO;
+import org.apache.jena.atlas.io.IndentedLineBuffer;
+import org.apache.jena.atlas.lib.Cache;
+import org.apache.jena.atlas.lib.CacheFactory;
+import org.apache.jena.atlas.web.ContentType;
+import org.apache.jena.fuseki.DEF;
+import org.apache.jena.fuseki.Fuseki;
+import org.apache.jena.fuseki.FusekiLib;
+import org.apache.jena.fuseki.cache.CacheAction;
+import org.apache.jena.fuseki.cache.CacheEntry;
+import org.apache.jena.query.*;
+import org.apache.jena.riot.web.HttpNames;
+import org.apache.jena.sparql.core.Prologue;
+import org.apache.jena.sparql.resultset.SPARQLResult;
+import org.apache.jena.web.HttpSC;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.*;
+
+import static java.lang.String.format;
+import static org.apache.jena.fuseki.server.CounterName.QueryTimeouts;
+import static org.apache.jena.riot.WebContent.*;
+import static org.apache.jena.riot.web.HttpNames.*;
+import static org.apache.jena.riot.web.HttpNames.paramTimeout;
+
+public class SPARQL_Query_Cache extends SPARQL_Protocol {
+
+ private static final String QueryParseBase = Fuseki.BaseParserSPARQL ;
+
+ private static Cache cache = null;
+
+ private int CACHE_SIZE = 10000;
+
+ public SPARQL_Query_Cache() {
+ super() ;
+ if(cache == null){
+ cache = CacheFactory.createCache(CACHE_SIZE);
--- End diff --
Why this logic in the constructor? Why not just initialize in the field
declaration?
> SPARQL Query Caching
> --------------------
>
> Key: JENA-626
> URL: https://issues.apache.org/jira/browse/JENA-626
> Project: Apache Jena
> Issue Type: Improvement
> Reporter: Andy Seaborne
> Assignee: Saikat Maitra
> Labels: java, linked_data, rdf, sparql
>
> Add a caching layer to Fuseki to cache the results of SPARQL Query requests.
> This cache should allow for in-memory and disk-based caching, configuration
> and cache management, and coordination with data modification.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
