This page has been superseded by Distributed Storage — OSS. Content below is kept for reference.

OSS State Store

agentscope-extensions-oss persists AgentScope agent state in Alibaba Cloud Object Storage Service (OSS). Ideal for large-capacity data and Alibaba Cloud ecosystems.

Add the dependency

<dependency>
    <groupId>io.agentscope</groupId>
    <artifactId>agentscope-extensions-oss</artifactId>
    <version>${agentscope.version}</version>
</dependency>

Quickstart

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import io.agentscope.core.state.AgentStateStore;
import io.agentscope.extensions.oss.OssAgentStateStore;

OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

AgentStateStore stateStore = OssAgentStateStore.builder()
    .ossClient(ossClient)
    .bucketName("my-agentscope-bucket")
    .keyPrefix("agentscope/state/")
    .build();

ReActAgent agent = ReActAgent.builder()
    .name("assistant")
    .model(model)
    .stateStore(stateStore)
    .build();

Key layout

The (userId, sessionId) pair is packed into OSS object paths:

Type	Key pattern
Single value	`{keyPrefix}{userId}/{sessionId}/{stateKey}.json`
List	`{keyPrefix}{userId}/{sessionId}/{stateKey}.list.json`
List hash	`{keyPrefix}{userId}/{sessionId}/{stateKey}.list.hash` (change detection)

Anonymous sessions (userId is null) use __anon__ as the user segment.

Builder reference

Method	Notes
`ossClient(OSS)`	Required. Alibaba Cloud OSS client
`bucketName(String)`	Required. OSS bucket name
`keyPrefix(String)`	Default `agentscope/state/`

Security

Use RAM Role + STS temporary credentials in production — avoid hardcoded AK/SK
Configure bucket lifecycle rules (e.g. 7-day auto-expiry) to control storage costs