org.apache.logging.log4j.core.config.composite

Class DefaultMergeStrategy

java.lang.Object

org.apache.logging.log4j.core.config.composite.DefaultMergeStrategy

All Implemented Interfaces:

MergeStrategy

public class DefaultMergeStrategy
extends Object
implements MergeStrategy

The default merge strategy for composite configurations.

The default merge strategy performs the merge according to the following rules:

1. Aggregates the global configuration attributes with those in later configurations replacing those in previous configurations with the exception that the highest status level and the lowest monitorInterval greater than 0 will be used.
2. Properties from all configurations are aggregated. Duplicate properties replace those in previous configurations.
3. Filters are aggregated under a CompositeFilter if more than one Filter is defined. Since Filters are not named duplicates may be present.
4. Scripts and ScriptFile references are aggregated. Duplicate definiations replace those in previous configurations.
5. Appenders are aggregated. Appenders with the same name are replaced by those in later configurations, including all of the Appender's subcomponents.
6. Loggers are all aggregated. Logger attributes are individually merged with duplicates being replaced by those in later configurations. Appender references on a Logger are aggregated with duplicates being replaced by those in later configurations. Filters on a Logger are aggregated under a CompositeFilter if more than one Filter is defined. Since Filters are not named duplicates may be present. Filters under Appender references included or discarded depending on whether their parent Appender reference is kept or discarded.

Constructor Summary

Constructors

Constructor and Description
DefaultMergeStrategy()

Method Summary

Modifier and Type	Method and Description
void	mergConfigurations(Node target, Node source, PluginManager pluginManager) Merge the source Configuration into the target Configuration.
void	mergeRootProperties(Node rootNode, AbstractConfiguration configuration) Merge the root properties.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultMergeStrategy

public DefaultMergeStrategy()

Method Detail

mergeRootProperties

public void mergeRootProperties(Node rootNode,
                                AbstractConfiguration configuration)

Merge the root properties.

Specified by:

mergeRootProperties in interface MergeStrategy

Parameters:

rootNode - The composite root node.

configuration - The configuration to merge.

mergConfigurations

public void mergConfigurations(Node target,
                               Node source,
                               PluginManager pluginManager)

Merge the source Configuration into the target Configuration.

Specified by:

mergConfigurations in interface MergeStrategy

Parameters:

target - The target node to merge into.

source - The source node.

pluginManager - The PluginManager.