robindb's Introduction

RobinDB

SSTable implement in Java

usage

mvn clean package -DskipTests=true

After build success , then distribution package will be generated.

To start the startup script under RobinDB-{version}/startup directory

basic command

Open browser , visit ip:8888, post a request to put a key value

curl -H "Content-Type:application/json" -X POST -d '{"key":"Hello","val":"RobinDB"}' 'http://ip:8888/put'

Then get the result , using a get request

curl 'http://ip:8888/get/{key}'

To remove a key , using delete request

curl -X DELETE 'http://ip:8888/delete/{key}'

Using only SSTable embeded in pure java code

Include maven dependency

<dependency>
    <groupId>com.ido.robin</groupId>
    <artifactId>core</artifactId>
    <version>1.0-SNAPSHOT</version>
</dependency>

Then create a SSTable instance to manage content

SSTable ssTable = new SSTable();
ssTable.put("test","client");
ssTable.flush();
System.out.println(ssTable.get("test"));
ssTable.close();

1. support expire data

    SSTable ssTable = new SSTable();
    long expireTime = 10;
    ssTable.put("test","client",expireTime);
    System.out.println(ssTable.get("test"));
    ssTable.close();

2. SSTablePlus support storing object data convenient

    SSTblePlus ssTable = new SSTblePlus();
    Person p = new Person();
    ssTable.putObject("key",p);
    Person result = ssTable.getObject("key");

Support Add and Remove server node dynamically

To add a new node to serve

curl -H "Content-Type:application/json" -X POST -d '{"host":"new-host","port":"server-port","httpPort":"the-server-port""}' 'http://ip:8888/node/add'

after the command return success response , then a new server is added to serve.

To remove a existed node

And send blow command to remove a serving node

curl -H "Content-Type:application/json" -X DELETE -d '{"host":"new-host","port":"server-port"}' 'http://ip:8888/node/delete'

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robindb's Issues

Data replicate

To support data replicate in each node.

add node info to "/state " response

in the /state response, it would be nice to add some node info so that the UI can aggregate the result to make a new UI componet showing total meta data info of a node.

update the method 'handleHttpRequest' of CoordinatorHandler

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