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Extend storage

SkyWalking has already provided several storage solutions. In this document, you could learn how to implement a new storage easily.

Define your storage provider

Define a class extends org.apache.skywalking.oap.server.library.module.ModuleProvider.
Set this provider targeting to Storage module.

@Override 
public Class<? extends ModuleDefine> module() {
    return StorageModule.class;
}

Implement all DAOs

Here is the list of all DAO interfaces in storage

IServiceInventoryCacheDAO
IServiceInstanceInventoryCacheDAO
H2EndpointInventoryCacheDAO
H2NetworkAddressInventoryCacheDAO
IBatchDAO
StorageDAO
IRegisterLockDAO
H2TopologyQueryDAO
IMetricQueryDAO
ITraceQueryDAO
IMetadataQueryDAO
IAggregationQueryDAO
IAlarmQueryDAO
IHistoryDeleteDAO

Register all service implementations

In public void prepare(), use this#registerServiceImplementation method to do register binding your implementation with the above interfaces.

Example

Take org.apache.skywalking.oap.server.storage.plugin.elasticsearch.StorageModuleElasticsearchProvider or org.apache.skywalking.oap.server.storage.plugin.jdbc.mysql.MySQLStorageProvider as a good example.

Redistribution with new storage implementation.

You don't have to clone the main repo just for implementing the storage. You could just easy depend our Apache releases. Take a look at SkyAPM/SkyWalking-With-Es5x-Storage repo, SkyWalking v6 redistribution with ElasticSearch 5 TCP connection storage implementation.

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