com.ora.jsp.tags.sql
Class TransactionTag
java.lang.Object
|
+--javax.servlet.jsp.tagext.TagSupport
|
+--com.ora.jsp.tags.sql.TransactionTag
- All Implemented Interfaces:
- java.io.Serializable, javax.servlet.jsp.tagext.Tag
- public class TransactionTag
- extends javax.servlet.jsp.tagext.TagSupport
This class is a custom action for executing a SQL SELECT statement.
The statement must be defined in the body of the action. It can
contain ? place holders, replaced by the value of
elements before execution. The number and order of place holders must
match the number and order of elements in the body.
- Version:
- 1.0
- Author:
- Hans Bergsten, Gefion software
- See Also:
- Serialized Form
Fields inherited from class javax.servlet.jsp.tagext.TagSupport |
id, pageContext, parent, values |
Fields inherited from interface javax.servlet.jsp.tagext.Tag |
EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE |
Method Summary |
int |
doEndTag()
Commits the transaction, resets the auto commit flag and closes
the Connection (so it's returned to the pool). |
int |
doStartTag()
Sets the Connection to be used by all nested DB actions. |
(package private) java.sql.Connection |
getConnection()
Returns the Connection used for the transaction. |
private java.sql.Connection |
getTransactionConnection()
Gets a DataSource from the application scope, with the
name specified by the dataSource attribute, and prepares
it for transaction handling. |
void |
release()
Releases all instance variables. |
void |
setDataSource(java.lang.String dataSourceName)
Sets the dataSource attribute. |
Methods inherited from class javax.servlet.jsp.tagext.TagSupport |
findAncestorWithClass, getId, getParent, getValue, getValues, removeValue, setId, setPageContext, setParent, setValue |
Methods inherited from class java.lang.Object |
, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait |
dataSourceName
private java.lang.String dataSourceName
conn
private java.sql.Connection conn
TransactionTag
public TransactionTag()
setDataSource
public void setDataSource(java.lang.String dataSourceName)
- Sets the dataSource attribute.
- Parameters:
dataSource
- the name of the DataSource object available
in the application scope
doStartTag
public int doStartTag()
throws javax.servlet.jsp.JspException
- Sets the Connection to be used by all nested DB actions.
- Overrides:
doStartTag
in class javax.servlet.jsp.tagext.TagSupport
doEndTag
public int doEndTag()
throws javax.servlet.jsp.JspException
- Commits the transaction, resets the auto commit flag and closes
the Connection (so it's returned to the pool).
- Overrides:
doEndTag
in class javax.servlet.jsp.tagext.TagSupport
release
public void release()
- Releases all instance variables.
- Overrides:
release
in class javax.servlet.jsp.tagext.TagSupport
getConnection
java.sql.Connection getConnection()
- Returns the Connection used for the transaction. This
method is used by nested DB actions.
getTransactionConnection
private java.sql.Connection getTransactionConnection()
throws javax.servlet.jsp.JspException
- Gets a DataSource from the application scope, with the
name specified by the dataSource attribute, and prepares
it for transaction handling.