PropertySetCallback

Overview

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Class

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Deprecated

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org.apache.derby.iapi.services.property
Interface PropertySetCallback

public interface PropertySetCallback

Method Summary

org.apache.derby.iapi.services.daemon.Serviceable apply(java.lang.String key, java.io.Serializable value, java.util.Dictionary p)
          Apply a property change.

void init(boolean dbOnly, java.util.Dictionary p)
          Initialize the properties for this callback.

java.io.Serializable map(java.lang.String key, java.io.Serializable value, java.util.Dictionary p)
          Map a proposed new value for a property to an official value.

boolean validate(java.lang.String key, java.io.Serializable value, java.util.Dictionary p)
          Validate a property change.

Method Detail

init

public void init(boolean dbOnly,
                 java.util.Dictionary p)

Initialize the properties for this callback. Called when addPropertySetNotification() is called with a non-null transaction controller. This allows code to set read its initial property values at boot time.

Code within an init() method should use the 3 argument PropertyUtil method getPropertyFromSet() to obtain a property's value.

validate

public boolean validate(java.lang.String key,
                        java.io.Serializable value,
                        java.util.Dictionary p)
                 throws org.apache.derby.iapi.error.StandardException

Validate a property change.

apply

public org.apache.derby.iapi.services.daemon.Serviceable apply(java.lang.String key,
                                                               java.io.Serializable value,
                                                               java.util.Dictionary p)
                                                        throws org.apache.derby.iapi.error.StandardException

Apply a property change. Will only be called after validate has been called and only if validate returned true. If this method is called then the new value is the value to be used, ie. the property is not set in the overriding JVM system set.

map

public java.io.Serializable map(java.lang.String key,
                                java.io.Serializable value,
                                java.util.Dictionary p)
                         throws org.apache.derby.iapi.error.StandardException

Map a proposed new value for a property to an official value. Will only be called after apply() has been called.