Thread: [Bigdata-commit] SF.net SVN: bigdata:[7918] branches/RDR/bigdata-sails/src/java/com/bigdata/ rdf/sa

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Revision: 7918
          http://sourceforge.net/p/bigdata/code/7918
Author:   tobycraig
Date:     2014-03-07 19:20:47 +0000 (Fri, 07 Mar 2014)
Log Message:
-----------
#840 - Incremental truth maintenance servlet. Not yet fully working/tested. doClosure causes a hang after the first run. If truth maintenance is not configured, toggle should probably provide a response other than a 500.

Modified Paths:
--------------
    branches/RDR/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/NanoSparqlServer.java

Added Paths:
-----------
    branches/RDR/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/InferenceServlet.java

Added: branches/RDR/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/InferenceServlet.java
===================================================================

--- branches/RDR/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/InferenceServlet.java	                        (rev 0)
+++ branches/RDR/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/InferenceServlet.java	2014-03-07 19:20:47 UTC (rev 7918)
@@ -0,0 +1,128 @@
+/**
+Copyright (C) SYSTAP, LLC 2006-2014.  All rights reserved.
+
+Contact:
+     SYSTAP, LLC
+     4501 Tower Road
+     Greensboro, NC 27410
+     lic...@bi...
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; version 2 of the License.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+package com.bigdata.rdf.sail.webapp;
+
+import java.io.IOException;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.log4j.Logger;
+
+import com.bigdata.rdf.sail.BigdataSail.BigdataSailConnection;
+import com.bigdata.rdf.sail.BigdataSailRepositoryConnection;
+
+/**
+ * Incremental truth maintenance servlet. Turns incremental truth maintenance
+ * on and off, and allows database at once closure.
+ * 
+ * @see <a href="http://trac.bigdata.com/ticket/840">ticket</a>
+ * 
+ * @author tobycraig
+ */
+public class InferenceServlet extends BigdataRDFServlet {
+
+    /**
+     * 
+     */
+    private static final long serialVersionUID = 1L;
+    
+    static private final transient Logger log = Logger.getLogger(MultiTenancyServlet.class); 
+
+    /**
+     * Set to true or false, this parameter indicates the state that incremental
+     * truth maintenance should be set to.
+     */
+    private static final String TOGGLE = "toggle";
+
+    /**
+     * If present, compute closure.
+     */
+    private static final String DO_CLOSURE= "doClosure";
+
+    public InferenceServlet() {
+
+    }
+
+    /**
+     * Handle incremental truth maintenance.
+     */
+    @Override
+    protected void doPost(final HttpServletRequest req,
+            final HttpServletResponse resp) throws IOException {
+
+    	final boolean toggle = req.getParameter(TOGGLE) != null;
+    	final boolean doClosure= req.getParameter(DO_CLOSURE) != null;
+    	
+    	if(toggle) {
+    		doToggle(req, resp);
+    	}
+
+    	if(doClosure) {
+    		doClosure(req, resp);
+    	}
+    }
+    
+    /*
+     * Set incremental truth maintenance according to request
+     */
+    private void doToggle(final HttpServletRequest req,
+            final HttpServletResponse resp) throws IOException {
+
+    	final String toggle = req.getParameter(TOGGLE);
+        final String namespace = getNamespace(req);
+    	try {
+    		BigdataSailRepositoryConnection conn = getBigdataRDFContext()
+    				.getUnisolatedConnection(namespace);
+    		BigdataSailConnection sailConn = conn.getSailConnection(); 
+
+    		if(toggle.equals("true")) {
+        		sailConn.setTruthMaintenance(true);
+        	} else if(toggle.equals("false")) {
+        		sailConn.setTruthMaintenance(false);
+        	}
+    	} catch (Exception e) {
+    		throw new RuntimeException();
+    	}
+    	
+    }
+
+    /*
+     * Set off database at once closure. 
+     */
+    private void doClosure(final HttpServletRequest req,
+            final HttpServletResponse resp) throws IOException {
+
+        final String namespace = getNamespace(req);
+    	try {
+    		BigdataSailRepositoryConnection conn = getBigdataRDFContext()
+    				.getUnisolatedConnection(namespace);
+    		BigdataSailConnection sailConn = conn.getSailConnection();
+    		sailConn.computeClosure();
+    	} catch (Exception e) {
+    		throw new RuntimeException();
+    	}
+
+    }
+
+}


Property changes on: branches/RDR/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/InferenceServlet.java
___________________________________________________________________
Added: svn:mime-type
## -0,0 +1 ##
+text/plain
\ No newline at end of property
Added: svn:keywords
## -0,0 +1 ##
+Id Date Revision Author HeadURL
\ No newline at end of property
Modified: branches/RDR/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/NanoSparqlServer.java
===================================================================
--- branches/RDR/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/NanoSparqlServer.java	2014-03-07 17:42:40 UTC (rev 7917)
+++ branches/RDR/bigdata-sails/src/java/com/bigdata/rdf/sail/webapp/NanoSparqlServer.java	2014-03-07 19:20:47 UTC (rev 7918)
@@ -652,6 +652,10 @@
         context.addServlet(new ServletHolder(new MultiTenancyServlet()),
                 "/namespace/*");
         
+        // Incremental truth maintenance
+        context.addServlet(new ServletHolder(new InferenceServlet()),
+        		"/inference");
+        
         /**
          * Note: JSP pages for the servlet 2.5 specification add the following
          * dependencies:

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Thread: [Bigdata-commit] SF.net SVN: bigdata:[7918] branches/RDR/bigdata-sails/src/java/com/bigdata/ rdf/sa

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