added openjpa.Id property, and put logic in PersistenceUnitInfoImpl to set the openjpa.Id property to the persistence unit name if no openjpa.Id property is discovered.

git-svn-id: https://svn.apache.org/repos/asf/incubator/openjpa/trunk@475084 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -1383,4 +1383,22 @@ public interface OpenJPAConfiguration
      * configuration.
      */
     public StoreFacadeTypeRegistry getStoreFacadeTypeRegistry();
+    
+    /**
+     * An environment-specific identifier for this configuration. This 
+     * might correspond to a JPA persistence-unit name, or to some other
+     * more-unique value available in the current environment.
+     * 
+     * @since 0.9.7
+     */
+    public String getId();
+
+    /**
+     * An environment-specific identifier for this configuration. This 
+     * might correspond to a JPA persistence-unit name, or to some other
+     * more-unique value available in the current environment.
+     * 
+     * @since 0.9.7
+     */
+    public void setId(String id);
 }

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

@@ -127,6 +127,7 @@ public class OpenJPAConfigurationImpl
     public ObjectValue orphanedKeyPlugin;
     public ObjectValue compatibilityPlugin;
     public QueryCompilationCacheValue queryCompilationCachePlugin;
+    public StringValue id;
 
     // custom values
     public BrokerFactoryValue brokerFactoryPlugin;
@@ -466,6 +467,8 @@ public class OpenJPAConfigurationImpl
             "getQueryCompilationCacheInstance");
         addValue(queryCompilationCachePlugin);
         
+        addString("Id");
+
         // initialize supported options that some runtimes may not support
         supportedOptions.add(OPTION_NONTRANS_READ);
         supportedOptions.add(OPTION_OPTIMISTIC);
@@ -1405,6 +1408,15 @@ public class OpenJPAConfigurationImpl
         return _storeFacadeRegistry;
     }
     
+    public String getId() {
+        return id.get();
+    }
+    
+    public void setId(String id) {
+        assertNotReadOnly();
+        this.id.set(id);
+    }
+
     public void instantiateAll() {
         super.instantiateAll();
         getMetaDataRepositoryInstance();

openjpa-kernel/src/main/resources/org/apache/openjpa/conf/localizer.properties

@@ -557,6 +557,15 @@ QueryCompilationCache-displayorder: 50
 QueryCompilationCache-expert: true
 QueryCompilationCache-interface: java.util.Map
 
+Id-name: Configuration ID
+Id-desc: An environment-specific identifier for this configuration. This \
+	might correspond to a JPA persistence-unit name, or to some other \
+    more-unique value available in the current environment. 
+Id-type: General
+Id-cat: Persistence
+Id-displayorder: 50
+Id-expert: true
+
 no-named-cf: use a DataSource bound to JNDI
 diff-specs: Attempt to configure for multiple specifications.  Was configured \
 	for "{0}".  Attempt to now configure for "{1}".  This attempt will be \

openjpa-persistence/src/main/java/org/apache/openjpa/persistence/PersistenceUnitInfoImpl.java

@@ -357,6 +357,9 @@ public class PersistenceUnitInfoImpl
             map.remove(PersistenceProviderImpl.CLASS_TRANSFORMER_OPTIONS);
         }
 
+        if (!map.containsKey("openjpa.Id"))
+            map.put("openjpa.Id", info.getPersistenceUnitName());
+        
         Properties metaFactoryProps = new Properties();
         if (info.getManagedClassNames() != null 
             && !info.getManagedClassNames().isEmpty()) {