Non-optimistic transactions will no longer perform a version check when committing dirty objects, unless the NonOptimisticVersionCheck compatibility property is set to true. This allows dirty instances enlisted in a non-optimistic transaction to be allowed to overwrite conflicting versions in the database.

git-svn-id: https://svn.apache.org/repos/asf/incubator/openjpa/trunk@446799 13f79535-47bb-0310-9956-ffa450edef68

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/AbstractUpdateManager.java

@@ -35,6 +35,7 @@ import org.apache.openjpa.kernel.OpenJPAStateManager;
 import org.apache.openjpa.kernel.PCState;
 import org.apache.openjpa.lib.conf.Configurable;
 import org.apache.openjpa.lib.conf.Configuration;
+import org.apache.openjpa.util.ImplHelper;
 import org.apache.openjpa.util.OpenJPAException;
 import org.apache.openjpa.util.OptimisticException;
 
@@ -139,6 +140,8 @@ public abstract class AbstractUpdateManager
         RowManager rowMgr, JDBCStore store, Collection exceps,
         Collection customs) {
         try {
+            BitSet dirty;
+
             if (sm.getPCState() == PCState.PNEW && !sm.isFlushed()) {
                 insert(sm, (ClassMapping) sm.getMetaData(), rowMgr, store,
                     customs);
@@ -146,16 +149,7 @@ public abstract class AbstractUpdateManager
                 || sm.getPCState() == PCState.PDELETED) {
                 delete(sm, (ClassMapping) sm.getMetaData(), rowMgr, store,
                     customs);
-            } else if ((sm.getPCState() == PCState.PDIRTY && (!sm.isFlushed() || sm
+            } else if ((dirty = ImplHelper.getUpdateFields(sm)) != null) {
-                .isFlushedDirty()))
-                || (sm.getPCState() == PCState.PNEW && sm.isFlushedDirty())) {
-                BitSet dirty = sm.getDirty();
-                if (sm.isFlushed()) {
-                    dirty = (BitSet) dirty.clone();
-                    dirty.andNot(sm.getFlushed());
-                }
-
-                if (dirty.length() > 0)
                 update(sm, dirty, (ClassMapping) sm.getMetaData(), rowMgr,
                     store, customs);
             } else if (sm.isVersionUpdateRequired()) {

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/meta/strats/ColumnVersionStrategy.java

@@ -138,7 +138,7 @@ public abstract class ColumnVersionStrategy
 
         // set where and update conditions on row
         for (int i = 0; i < cols.length; i++) {
-            if (curVersion != null)
+            if (curVersion != null && sm.isVersionCheckRequired())
                 row.whereObject(cols[i], curVersion);
             if (vers.getColumnIO().isUpdatable(i, nextVersion == null))
                 row.setObject(cols[i], nextVersion);

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/meta/strats/StateComparisonVersionStrategy.java

@@ -101,6 +101,7 @@ public class StateComparisonVersionStrategy
         // db values match our previous image
         FieldMapping[] fields = (FieldMapping[]) sm.getMetaData().getFields();
         Row row;
+        if (sm.isVersionCheckRequired()) {
             for (int i = 0, max = loaded.length(); i < max; i++) {
                 if (!loaded.get(i))
                     continue;
@@ -120,10 +121,11 @@ public class StateComparisonVersionStrategy
                     continue;
 
                 // set WHERE criteria matching the previous state image so the
-            // update will fail if any changes have been made by another trans
+                // update will fail for any changes made by another transaction
                 fields[i].where(sm, store, rm, state[i]);
                 row.setFailedObject(sm.getManagedInstance());
             }
+        }
         sm.setNextVersion(nextState);
     }
 

openjpa-kernel/src/main/java/org/apache/openjpa/conf/Compatibility.java

@@ -26,6 +26,7 @@ public class Compatibility {
     private boolean _copyIds = false;
     private boolean _closeOnCommit = true;
     private boolean _quotedNumbers = false;
+    private boolean _nonOptimisticVersionCheck = false;
 
     /**
      * Whether to require exact identity value types when creating object
@@ -136,4 +137,24 @@ public class Compatibility {
     public void setCloseOnManagedCommit(boolean close) {
         _closeOnCommit = close;
 	}	
+
+    /** 
+     * Whether or not to perform a version check on instances being updated
+     * in a datastore transaction. Version of OpenJPA prior to 4.1 always
+     * forced a version check.
+     */
+    public void setNonOptimisticVersionCheck
+        (boolean nonOptimisticVersionCheck) {
+        _nonOptimisticVersionCheck = nonOptimisticVersionCheck;
+    }
+
+    /** 
+     * Whether or not to perform a version check on instances being updated
+     * in a datastore transaction. Version of OpenJPA prior to 4.1 always
+     * forced a version check.
+     */
+    public boolean getNonOptimisticVersionCheck() {
+        return _nonOptimisticVersionCheck;
+    }
+
 }

openjpa-kernel/src/main/java/org/apache/openjpa/kernel/StateManagerImpl.java

@@ -38,6 +38,7 @@ import org.apache.openjpa.meta.ValueMetaData;
 import org.apache.openjpa.meta.ValueStrategies;
 import org.apache.openjpa.util.ApplicationIds;
 import org.apache.openjpa.util.Exceptions;
+import org.apache.openjpa.util.ImplHelper;
 import org.apache.openjpa.util.InternalException;
 import org.apache.openjpa.util.InvalidStateException;
 import org.apache.openjpa.util.ObjectNotFoundException;
@@ -2926,7 +2927,23 @@ public class StateManagerImpl
      * Returns whether this instance needs a version check.
      */
     public boolean isVersionCheckRequired() {
-        return (_flags & FLAG_VERSION_CHECK) > 0;
+
+        // explicit flag for version check
+        if ((_flags & FLAG_VERSION_CHECK) > 0)
+            return true;
+
+        // need to check version if we have any dirty fields, unless we
+        // are in a datastore transaction
+        if (ImplHelper.getUpdateFields(this) != null) {
+            if (_broker.getOptimistic()) {
+                return true;
+            } else {
+                return _broker.getConfiguration().
+                    getCompatibilityInstance().getNonOptimisticVersionCheck();
+            }
+        }
+
+        return false;
     }
 
     /**

openjpa-kernel/src/main/java/org/apache/openjpa/util/ImplHelper.java

@@ -17,6 +17,7 @@ package org.apache.openjpa.util;
 
 import java.lang.reflect.Method;
 import java.util.ArrayList;
+import java.util.BitSet;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Iterator;
@@ -166,6 +167,30 @@ public class ImplHelper {
         }
     }
 
+    /** 
+     * Returns the fields of the state that require an update. 
+     *  
+     * @param  sm  the state to check
+     * @return the BitSet of fields that need update, or null if none
+     */
+    public static BitSet getUpdateFields(OpenJPAStateManager sm) {
+
+        if ((sm.getPCState() == PCState.PDIRTY
+            && (!sm.isFlushed() || sm.isFlushedDirty()))
+            || (sm.getPCState() == PCState.PNEW && sm.isFlushedDirty())) {
+            BitSet dirty = sm.getDirty();
+            if (sm.isFlushed()) {
+                dirty = (BitSet) dirty.clone();
+                dirty.andNot(sm.getFlushed());
+            }
+
+            if (dirty.length() > 0)
+                return dirty;
+        }
+
+        return null;
+    }
+
     /**
      * Close the given resource. The resource can be an extent iterator,
      * query result, large result set relation, or any closeable OpenJPA