Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> impl >> [ jdbc overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

org.apache.derby.impl.jdbc
Class EmbedConnectionContext  

java.lang.Object
  org.apache.derby.iapi.services.context.ContextImpl
      org.apache.derby.impl.jdbc.EmbedConnectionContext

All Implemented Interfaces:

org.apache.derby.iapi.jdbc.ConnectionContext, org.apache.derby.iapi.services.context.Context

---

public class EmbedConnectionContext

extends org.apache.derby.iapi.services.context.ContextImpl

implements org.apache.derby.iapi.jdbc.ConnectionContext

---

Field Summary
private  java.lang.ref.SoftReference	connRef           We hold a soft reference to the connection so that when the application releases its reference to the Connection without closing it, its finalize method will be called, which will then close the connection.

 

Fields inherited from class org.apache.derby.iapi.services.context.ContextImpl

 

Fields inherited from interface org.apache.derby.iapi.jdbc.ConnectionContext

CONTEXT_ID

 

Constructor Summary
(package private)	EmbedConnectionContext(org.apache.derby.iapi.services.context.ContextManager cm, EmbedConnection conn)

 

Method Summary
void	cleanupOnError(java.lang.Throwable error)           Contexts will be passed errors that are caught by the outer system when they are serious enough to require corrective action.
java.sql.Connection	getNestedConnection(boolean internal)           Get a connection equivalent to the call
java.sql.ResultSet	getResultSet(org.apache.derby.iapi.sql.ResultSet executionResultSet)           Get a jdbc ResultSet based on the execution ResultSet.

 

Methods inherited from class org.apache.derby.iapi.services.context.ContextImpl

appendErrorInfo, getContextManager, getIdName, isLastHandler, popMe, pushMe

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

connRef

private java.lang.ref.SoftReference connRef

We hold a soft reference to the connection so that when the application releases its reference to the Connection without closing it, its finalize method will be called, which will then close the connection. If a direct reference is used here, such a Connection will never be closed or garbage collected as modules hold onto the ContextManager and thus there would be a direct reference through this object.

Constructor Detail

EmbedConnectionContext

EmbedConnectionContext(org.apache.derby.iapi.services.context.ContextManager cm,
                       EmbedConnection conn)

Method Detail

cleanupOnError

public void cleanupOnError(java.lang.Throwable error)

Description copied from interface: org.apache.derby.iapi.services.context.Context

Contexts will be passed errors that are caught by the outer system when they are serious enough to require corrective action. They will be told what the error is, so that they can react appropriately. Most of the time, the contexts will react by either doing nothing or by removing themselves from the context manager. If there are no other references to the context, removing itself from the manager equates to freeing it.

Contexts must release all their resources before removing themselves from their context manager.

The context manager will "unwind" the contexts during cleanup in the reverse order they were placed on its global stack.

If error is an instance of StandardException then an implementation of this method may throw a new exception if and only if the new exception is an instance of StandardException that is more severe than the original error or the new exception is a not an instance of StandardException (e.g java.lang.NullPointerException).

Specified by:

cleanupOnError in interface org.apache.derby.iapi.services.context.Context

---

getNestedConnection

public java.sql.Connection getNestedConnection(boolean internal)
                                        throws java.sql.SQLException

Get a connection equivalent to the call

                DriverManager.getConnection("jdbc:default:connection");
                

Specified by:

getNestedConnection in interface org.apache.derby.iapi.jdbc.ConnectionContext

---

getResultSet

public java.sql.ResultSet getResultSet(org.apache.derby.iapi.sql.ResultSet executionResultSet)
                                throws java.sql.SQLException

Get a jdbc ResultSet based on the execution ResultSet.

Specified by:

getResultSet in interface org.apache.derby.iapi.jdbc.ConnectionContext

---

Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> impl >> [ jdbc overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---