org.apache.cocoon.acting.modular
Class DatabaseQueryAction

java.lang.Object
  org.apache.avalon.framework.logger.AbstractLogEnabled
      org.apache.cocoon.acting.AbstractAction
          org.apache.cocoon.acting.AbstractConfigurableAction
              org.apache.cocoon.acting.ConfigurableServiceableAction
                  org.apache.cocoon.acting.AbstractComplementaryConfigurableAction
                      org.apache.cocoon.acting.modular.DatabaseAction
                          org.apache.cocoon.acting.modular.DatabaseQueryAction

All Implemented Interfaces:

Disposable, Component, Configurable, LogEnabled, Serviceable, ThreadSafe, Action

public class DatabaseQueryAction
extends DatabaseAction

Executes an arbitrary query. The query is associated with a table and selected through the others mode. All keys and values are set in order of appearance, starting with keys, thus the query needs to have as many placeholders for prepared statement parameters. If it is an update query, the number of affected rows is returned to the sitemap.

 <table name="example">
   <queries>
      <query mode="one">update example set count=count+1 where id=?</query>
      <query mode="two">select count, name from example where id=?</query>
   </queries>
   <keys>
     <key name="id"/>
   </keys>
   <values/>
 </table>

Version:

CVS $Id: DatabaseQueryAction.html 1304258 2012-03-23 10:09:27Z ilgrosso $

Author:

Christian Haul

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cocoon.acting.modular.DatabaseAction

DatabaseAction.CacheHelper, DatabaseAction.Column, DatabaseAction.LookUpKey

Field Summary

Fields inherited from class org.apache.cocoon.acting.modular.DatabaseAction

cachedQueryData, dbselector, defaultModeNames, failOnEmpty, firstRow, pathSeparator

Fields inherited from class org.apache.cocoon.acting.ConfigurableServiceableAction

manager

Fields inherited from class org.apache.cocoon.acting.AbstractConfigurableAction

settings

Fields inherited from class org.apache.cocoon.acting.AbstractAction

EMPTY_MAP

Fields inherited from interface org.apache.cocoon.acting.Action

ROLE

Constructor Summary

DatabaseQueryAction()

Method Summary

protected Object[][]	getColumnValues(Configuration tableConf, DatabaseAction.CacheHelper queryData, Map objectModel) Fetch all values for all columns that are needed to do the database operation.
protected DatabaseAction.CacheHelper	getQuery(Configuration table, Map modeTypes, Map defaultModeNames) Get the String representation of the PreparedStatement.
protected boolean	honourAutoIncrement() determine whether autoincrement columns should be honoured by this operation.
protected int	processRow(Map objectModel, Connection conn, PreparedStatement statement, String outputMode, Configuration table, DatabaseAction.CacheHelper queryData, Object[][] columnValues, int rowIndex, Map results) set all necessary ?
protected String	selectMode(boolean isAutoIncrement, Map modes) determine which mode to use as default mode here: SELECT highly specific to operation INSERT / UPDATE / DELETE / SELECT

Methods inherited from class org.apache.cocoon.acting.modular.DatabaseAction

act, configure, dispose, fillModes, getColumnValue, getDataSource, getMode, getOutputName, getOutputName, isLargeObject, processTable, service, setColumn, setColumn, setOutput, setOutputAttribute

Methods inherited from class org.apache.cocoon.acting.AbstractComplementaryConfigurableAction

getConfiguration, getConfiguration, getConfiguration

Methods inherited from class org.apache.avalon.framework.logger.AbstractLogEnabled

enableLogging, getLogger, setupLogger, setupLogger, setupLogger

Methods inherited from class java.lang.Object

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

Constructor Detail

DatabaseQueryAction

public DatabaseQueryAction()

Method Detail

selectMode

protected String selectMode(boolean isAutoIncrement,
                            Map modes)

determine which mode to use as default mode here: SELECT highly specific to operation INSERT / UPDATE / DELETE / SELECT

Specified by:

selectMode in class DatabaseAction

honourAutoIncrement

protected boolean honourAutoIncrement()

determine whether autoincrement columns should be honoured by this operation. This is usually snsible only for INSERTs.

Specified by:

honourAutoIncrement in class DatabaseAction

getQuery

protected DatabaseAction.CacheHelper getQuery(Configuration table,
                                              Map modeTypes,
                                              Map defaultModeNames)
                                       throws ConfigurationException,
                                              ServiceException

Get the String representation of the PreparedStatement. This is mapped to the Configuration object itself, so if it doesn't exist, it will be created.

Specified by:

getQuery in class DatabaseAction

Parameters:

table - the table's configuration object

Returns:

the insert query as a string

Throws:

ConfigurationException

ServiceException

getColumnValues

protected Object[][] getColumnValues(Configuration tableConf,
                                     DatabaseAction.CacheHelper queryData,
                                     Map objectModel)
                              throws ConfigurationException,
                                     ServiceException

Fetch all values for all columns that are needed to do the database operation.

Throws:

ConfigurationException

ServiceException

processRow

protected int processRow(Map objectModel,
                         Connection conn,
                         PreparedStatement statement,
                         String outputMode,
                         Configuration table,
                         DatabaseAction.CacheHelper queryData,
                         Object[][] columnValues,
                         int rowIndex,
                         Map results)
                  throws SQLException,
                         ConfigurationException,
                         Exception

set all necessary ?s and execute the query

Specified by:

processRow in class DatabaseAction

Throws:

SQLException

ConfigurationException

Exception