dbclient-engine-storage

name	dbclient-engine-storage
description	Document / object / graph / big-data storage engines in DBClient: MongoDB, MinIO, Hadoop, Hive, Vault, and Nebula. Use this skill when adding, debugging, or modifying such a Tester.

DBClient Engine: Storage / NoSQL / Big Data

Covered Testers and Aliases

Engine	Tester	Aliases
MongoDB	MongoDBTester.java	mongo, mongodb
MinIO	MinioTester.java	minio
Hadoop	HadoopTester.java	hadoop
Hive	HiveTester.java	hive
Vault	VaultTester.java	vault
Nebula	NebulaTester.java	nebula

Key Dependencies (build.gradle)

// MongoDB
implementation 'org.mongodb:mongodb-driver-sync:4.6.1'
implementation 'org.mongodb:mongodb-driver-reactivestreams:4.6.1'

// MinIO
implementation 'io.minio:minio:8.5.11'

// Hadoop
implementation 'org.apache.hadoop:hadoop-client:3.3.6'

// Hive
implementation('org.apache.hive:hive-jdbc:3.1.3') {
    exclude group: 'org.apache.hadoop'
    exclude group: 'org.apache.hbase'
}

// Nebula
implementation 'com.vesoft:client:3.8.4'
implementation 'com.alibaba:fastjson:2.0.57'

Key Concerns

• MongoDB uses MongoDBResult to wrap List<Document>; TestExecutor.formatQueryResult() has a special JSON branch for mongodb.
• MinIO is object storage; the query parameter usually follows bucket/key semantics; -B / --bucket and -k / --key are the dedicated parameters.
• Hive excludes hadoop/hbase to avoid conflicts with hadoop-client.
• Nebula is a graph database; its connection and query semantics differ from JDBC.

Minimal Verification Command (MongoDB Example)

java -jar build/libs/oneclient-1.0-all.jar \
  -h 127.0.0.1 -P 27017 -u admin -p password -d test \
  -e mongodb -t query -q "db.collection.find().limit(1)"

Maintenance Notes

• When adding a new NoSQL / object storage engine, add a result-formatting branch in TestExecutor if needed.
• When adding Hadoop/Hive dependencies, check whether a local libs/ jar is also required.