svn commit: r1383203 - /cayenne/main/branches/STABLE-3.1/framework/cayenne-jdk1.5-unpublished/src/test/java/org/apache/cayenne/access/NestedDataContext_DeadlockTest.java

[aa...@apache.org]

Author: aadamchik
Date: Tue Sep 11 01:23:04 2012
New Revision: 1383203

URL: http://svn.apache.org/viewvc?rev=1383203&view=rev
Log:
CAY-957 Deadlock in nested contexts

(cherry picked from commit fa830b1612440d4b50e071040c901496bd4345ad)

Added:
    cayenne/main/branches/STABLE-3.1/framework/cayenne-jdk1.5-unpublished/src/test/java/org/apache/cayenne/access/NestedDataContext_DeadlockTest.java

Added: cayenne/main/branches/STABLE-3.1/framework/cayenne-jdk1.5-unpublished/src/test/java/org/apache/cayenne/access/NestedDataContext_DeadlockTest.java
URL: http://svn.apache.org/viewvc/cayenne/main/branches/STABLE-3.1/framework/cayenne-jdk1.5-unpublished/src/test/java/org/apache/cayenne/access/NestedDataContext_DeadlockTest.java?rev=1383203&view=auto
==============================================================================
--- cayenne/main/branches/STABLE-3.1/framework/cayenne-jdk1.5-unpublished/src/test/java/org/apache/cayenne/access/NestedDataContext_DeadlockTest.java (added)
+++ cayenne/main/branches/STABLE-3.1/framework/cayenne-jdk1.5-unpublished/src/test/java/org/apache/cayenne/access/NestedDataContext_DeadlockTest.java Tue Sep 11 01:23:04 2012
@@ -0,0 +1,125 @@
+/*****************************************************************
+ *   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.cayenne.access;
+
+import java.util.List;
+import java.util.Random;
+
+import org.apache.cayenne.ObjectContext;
+import org.apache.cayenne.configuration.server.ServerRuntime;
+import org.apache.cayenne.di.Inject;
+import org.apache.cayenne.query.EJBQLQuery;
+import org.apache.cayenne.test.jdbc.DBHelper;
+import org.apache.cayenne.test.jdbc.TableHelper;
+import org.apache.cayenne.testdo.testmap.Artist;
+import org.apache.cayenne.unit.di.server.ServerCase;
+import org.apache.cayenne.unit.di.server.UseServerRuntime;
+
+@UseServerRuntime(ServerCase.TESTMAP_PROJECT)
+public class NestedDataContext_DeadlockTest extends ServerCase {
+
+    @Inject
+    private DataContext parent;
+
+    @Inject
+    private ServerRuntime runtime;
+
+    @Inject
+    protected DBHelper dbHelper;
+
+    protected TableHelper tArtist;
+
+    @Override
+    protected void setUpAfterInjection() throws Exception {
+        dbHelper.deleteAll("PAINTING_INFO");
+        dbHelper.deleteAll("PAINTING");
+        dbHelper.deleteAll("ARTIST_EXHIBIT");
+        dbHelper.deleteAll("ARTIST_GROUP");
+        dbHelper.deleteAll("ARTIST");
+
+        tArtist = new TableHelper(dbHelper, "ARTIST");
+        tArtist.setColumns("ARTIST_ID", "ARTIST_NAME");
+    }
+
+    private void createArtists() throws Exception {
+        for (int i = 0; i < 300; i++) {
+            tArtist.insert(i + 1, "X" + i);
+        }
+    }
+
+    public void testDeadlock() throws Exception {
+
+        createArtists();
+
+        Thread[] threads = new Thread[2];
+
+        Random rnd = new Random(System.currentTimeMillis());
+        for (int i = 0; i < threads.length; i++) {
+            threads[i] = new UpdateThread(
+                    "UpdateThread-" + i,
+                    runtime.getContext(parent),
+                    rnd);
+        }
+
+        for (int i = 0; i < threads.length; i++) {
+            threads[i].start();
+        }
+
+        synchronized (parent) {
+            parent.wait(10000);
+        }
+
+        for (int i = 0; i < threads.length; i++) {
+            // unfortunately here we'll have to leave some dead threads behind... Of
+            // course if there's no deadlock, there won't be a leak either
+            assertTrue("Deadlocked thread", !threads[i].isAlive());
+        }
+    }
+
+    static class UpdateThread extends Thread {
+
+        protected ObjectContext nestedContext;
+        protected Random rnd;
+
+        UpdateThread(String name, ObjectContext nestedContext, Random rnd) {
+            super(name);
+            setDaemon(true);
+            this.nestedContext = nestedContext;
+            this.rnd = rnd;
+        }
+
+        @Override
+        public void run() {
+
+            List<Artist> artists = nestedContext.performQuery(new EJBQLQuery(
+                    "select a FROM Artist a"));
+
+            for (int i = 0; i < 100; i++) {
+
+                for (int j = 0; j < 5; j++) {
+                    int index = rnd.nextInt(artists.size());
+                    Artist a = artists.get(index);
+                    a.setArtistName("Y" + rnd.nextInt());
+                }
+
+                nestedContext.commitChanges();
+            }
+        }
+    }
+}