Implementation:Apache Shardingsphere MetaDataContextsInitFactory Create

Knowledge Sources	Apache_Shardingsphere
Domains	Mode_Management, Metadata, Initialization
Last Updated	2026-02-10 00:00 GMT

Overview

Abstract factory providing a template method for initializing MetaDataContexts with global rules, databases, and statistics.

Description

MetaDataContextsInitFactory defines the initialization pattern for creating MetaDataContexts. Subclasses implement the abstract create() method to load data from either local configuration or a remote register center. The protected createMetaDataContexts() method assembles the final context from global rules, database collections, and statistics.

Usage

Subclassed by LocalConfigurationMetaDataContextsInitFactory and RegisterCenterMetaDataContextsInitFactory to support different initialization sources.

Code Reference

Source Location

• Repository: Apache_Shardingsphere
• File: MetaDataContextsInitFactory.java
• Lines: 1-60

Signature

public abstract class MetaDataContextsInitFactory {

    public abstract MetaDataContexts create(ContextManagerBuilderParameter param);

    protected final MetaDataContexts createMetaDataContexts(
        Collection<RuleConfiguration> globalRuleConfigs,
        Map<String, ShardingSphereDatabase> databases,
        Properties props);
}

Import

import org.apache.shardingsphere.mode.metadata.factory.init.MetaDataContextsInitFactory;

I/O Contract

Inputs

Name	Type	Required	Description
param	ContextManagerBuilderParameter	Yes	Bootstrap parameters including config and mode
globalRuleConfigs	Collection<RuleConfiguration>	Yes	Global rule configurations
databases	Map<String, ShardingSphereDatabase>	Yes	Database metadata map
props	Properties	Yes	System properties

Outputs

Name	Type	Description
create() returns	MetaDataContexts	Fully initialized metadata context

Usage Examples

// Used internally by ContextManagerBuilder implementations
MetaDataContextsInitFactory factory = new LocalConfigurationMetaDataContextsInitFactory(persistFacade);
MetaDataContexts contexts = factory.create(builderParam);

Related Pages

• Principle:Apache_Shardingsphere_MetaData_Context_Creation