创建实时任务数据源

通过 DataStreamSource dataStreamSource = StreamBuilder.dataStream("test_namespace", "graph_pipeline");完成dataStreamSource的构建后，就可以通过dataStreamSource来创建数据源了

我们可以从如下数据中创建数据源

数组

    Object[] array = .....; //数组
    DataStream dataStream = dataStreamSource.fromArray(array);

文件

    String filepath = .....; //文件路径
    DataStream dataStream = dataStreamSource.fromFile(filePath);

或者

    String filepath = .....;  //文件路径
    Boolean isJsonData = true;   //是否json格式
    DataStream dataStream = dataStreamSource.fromFile(filePath, isJsonData);

Rocketmq

     String topic = .....; //rocketmq 的topic
     String groupName = .....; // rocketmq的消费组
     String namesrvAddress = ......; //rocketmq的nameserver
     DataStream dataStream = dataStreamSource.fromRocketmq(topic, groupName, namesrvAddress);

或者

    String topic = .....; //rocketmq 的topic
    String groupName = .....; // rocketmq的消费组
    String namesrvAddress = ......; //rocketmq的nameserver
    Boolean isJsonData = true; //是否json     
    DataStream dataStream = dataStreamSource.fromRocketmq(topic, groupName, isJsonData, namesrvAddress);

或者

    String topic = .....; //rocketmq 的topic
    String groupName = .....; // rocketmq的消费组
    String namesrvAddress = ......; //rocketmq的nameserver
    Boolean isJsonData = true; //是否json     
    String tags = ......; // rocketmq的tag信息
    DataStream dataStream = dataStreamSource.fromRocketmq(topic, groupName, tags, isJsonData, namesrvAddress);

MQTT协议

    String url = ......;
    String clientId = ......;
    String topic = ......;
    DataStream dataStream = dataStreamSource.fromMqtt(url, cliientId, topic);

或者

    String url = ......;
    String clientId = ......;
    String topic = ......;
    String username = ......;
    String password = ......;
    DataStream dataStream = dataStreamSource.fromMqtt(url, cliientId, topic, username, password);

或者

    String url = ......;
    String clientId = ......;
    String topic = ......;
    String username = ......;
    String password = ......;
    Boolean cleanSession = true;
    Integer connectionTimeout = 10;
    Integer aliveInterval = 60;
    Boolean automatiicReconnect = true;
    DataStream dataStream = dataStreamSource.fromMqtt(url, cliientId, topic, username, password, cleanSession, connectionTimeout, aliveInterval, automaticReconnect);

##自定义Source

    DataStream dataStream = dataStreamSource.from(new ISource<ISource>() {});