Package org.apache.velocity.example

Class DBContext

java.lang.Object
org.apache.velocity.context.AbstractContext
org.apache.velocity.example.DBContext
All Implemented Interfaces:
Context, InternalEventContext
public class DBContext extends AbstractContext
Example context impl that uses a database to store stuff :) yes, this is silly expects a mysql db test with table CREATE TABLE contextstore ( k varchar(100), val blob ); very fragile, crappy code.... just a demo!
Version:
$Id$
Author:
Geir Magnusson Jr.

  • Constructor Details

    • DBContext

      public DBContext()

    • DBContext

      public DBContext(Context inner)

  • Method Details

    • internalGet

      public Object internalGet(String key)
      retrieves a serialized object from the db and returns the living instance to the caller.
      Specified by:
      internalGet in class AbstractContext
      Parameters:
      key - key whose associated value is to be returned
      Returns:
      object stored in the context

    • internalPut

      public Object internalPut(String key, Object value)
      Serializes and stores an object in the database. This is really a hokey way to do it, and will cause problems. The right way is to use a prepared statement...
      Specified by:
      internalPut in class AbstractContext
      Parameters:
      key - key with which to associate the value
      value - value to be associated with the key
      Returns:
      previously stored value if exists, or null

    • internalContainsKey

      public boolean internalContainsKey(String key)
      Not implementing. Not required for Velocity core operation, so not bothering. As we say above : "very fragile, crappy code..."
      Specified by:
      internalContainsKey in class AbstractContext
      Parameters:
      key - key to test for existence
      Returns:
      true if found, false if not

    • internalGetKeys

      public String[] internalGetKeys()
      Not implementing. Not required for Velocity core operation, so not bothering. As we say above : "very fragile, crappy code..."
      Specified by:
      internalGetKeys in class AbstractContext
      Returns:
      array of keys

    • internalRemove

      public Object internalRemove(String key)
      Not implementing. Not required for Velocity core operation, so not bothering. As we say above : "very fragile, crappy code..."
      Specified by:
      internalRemove in class AbstractContext
      Parameters:
      key - key to remove
      Returns:
      object removed if exists, else null

    • pushCurrentTemplateName

      public void pushCurrentTemplateName(String s)
      set the current template name on top of stack
      Parameters:
      s - current template name

    • popCurrentTemplateName

      public void popCurrentTemplateName()
      remove the current template name from stack

    • getCurrentTemplateName

      public String getCurrentTemplateName()
      get the current template name
      Returns:
      String current template name

    • getTemplateNameStack

      public String[] getTemplateNameStack()
      get the current template name stack
      Returns:
      String[] with the template name stack contents.

    • pushCurrentMacroName

      public void pushCurrentMacroName(String s)
      set the current macro name on top of stack
      Parameters:
      s - current macro name

    • popCurrentMacroName

      public void popCurrentMacroName()
      remove the current macro name from stack

    • getCurrentMacroName

      public String getCurrentMacroName()
      get the current macro name
      Returns:
      String current macro name

    • getCurrentMacroCallDepth

      public int getCurrentMacroCallDepth()
      get the current macro call depth
      Returns:
      int current macro call depth

    • getMacroNameStack

      public String[] getMacroNameStack()
      get the current macro name stack
      Returns:
      String[] with the macro name stack contents.

    • icacheGet

      public IntrospectionCacheData icacheGet(Object key)
      returns an IntrospectionCache Data (@see IntrospectionCacheData) object if exists for the key
      Parameters:
      key - key to find in cache
      Returns:
      cache object

    • icachePut

      public void icachePut(Object key, IntrospectionCacheData o)
      places an IntrospectionCache Data (@see IntrospectionCacheData) element in the cache for specified key
      Parameters:
      key - key
      o - IntrospectionCacheData object to place in cache

    • setCurrentResource

      public void setCurrentResource(Resource r)
      See Also:
      • InternalHousekeepingContext.setCurrentResource(org.apache.velocity.runtime.resource.Resource)

    • getCurrentResource

      public Resource getCurrentResource()
      See Also:
      • InternalHousekeepingContext.getCurrentResource()

    • setMacroLibraries

      public void setMacroLibraries(List<Template> macroLibraries)
      See Also:
      • InternalHousekeepingContext.setMacroLibraries(List)

    • getMacroLibraries

      public List<Template> getMacroLibraries()
      See Also:
      • InternalHousekeepingContext.getMacroLibraries()

    • attachEventCartridge

      public EventCartridge attachEventCartridge(EventCartridge ec)
      Specified by:
      attachEventCartridge in interface InternalEventContext
      Parameters:
      ec -
      Returns:
      The old EventCartridge.
      See Also:

    • getEventCartridge

      public EventCartridge getEventCartridge()
      Specified by:
      getEventCartridge in interface InternalEventContext
      Returns:
      The current EventCartridge.
      See Also: