org.apache.ambari.server.upgrade

Class SchemaUpgradeUtil

java.lang.Object

org.apache.ambari.server.upgrade.SchemaUpgradeUtil

public class SchemaUpgradeUtil
extends Object

Method Summary

Modifier and Type	Method and Description
static String	extractProperty(String content, String propertyName, String variableName, String propertyPattern, String defaultValue, Map<String,String> newProperties) Extracts a new property that was introduced to make a content type property more configurable by making a hard coded value changeable.

Methods inherited from class java.lang.Object

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

Method Detail

extractProperty

public static String extractProperty(String content,
                                     String propertyName,
                                     String variableName,
                                     String propertyPattern,
                                     String defaultValue,
                                     Map<String,String> newProperties)

Extracts a new property that was introduced to make a content type property more configurable by making a hard coded value changeable. The function takes a pattern to identify the previous value of the property, and replaces the actual value with a reference to the new property, and also adds the new property to a map. Example: content: ... some.variable=HARDCODED_VALUE ... propertyName: some_variable variableName: some_variable_processed propertyPattern: some.variable=(\w) the function returns: ... some.variable={{some_variable_processed}} newProperties will contain: some_variable -> HARDCODED_VALUE

Parameters:

content - the content type variable's content before upgrade

propertyName - the name of the new property

variableName - the name of the variable that will be used in the content

propertyPattern - the regexp pattern to identify the property, must contain exactly one "(\w+)" for the actual value of the new property

defaultValue - the default value for the new property if the actual value can not be found in the content

newProperties - map of new properties where the extracted property will be put

Returns:

the updated content containing a reference to the new property