Flume 自定义Sink

自定义sink类，并将相关工程打包放在flume的lib目录下

public class MySink extends AbstractSink implements Configurable {

    private static final Logger logger = LoggerFactory.getLogger(MySink.class);

    //全局变量，仅做演示，无实际意义
    private String prefix;
    private String suffix;

    @Override
    public void configure(Context context) {

        prefix = context.getString("prefix");
        suffix = context.getString("suffix","atguigu");
    }

    @Override
    public Status process() throws EventDeliveryException {

        Status status = null;

        Channel channel = getChannel();
        Transaction transaction = channel.getTransaction();
        transaction.begin();

        try {
            Event event = channel.take();

            //核心业务逻辑，输出到日志
            String body = new String(event.getBody());
            logger.info(prefix+body+suffix);

            transaction.commit();
            status = Status.READY;

        }catch (Exception e){
            transaction.rollback();
            status = Status.BACKOFF;
        }finally {
            transaction.close();
        }



        return status;
    }

}

flume配置文件

# Name the components on this agent
a1.sources = r1
a1.sinks = k1
a1.channels = c1

# Describe/configure the source
a1.sources.r1.type = netcat
a1.sources.r1.bind = localhost
a1.sources.r1.port = 44444

# Describe the sink
a1.sinks.k1.type = com.atguigu.sink.MySink
a1.sinks.k1.prefix = sleep--
a1.sinks.k1.suffix = --banzhang

# Use a channel which buffers events in memory
a1.channels.c1.type = memory
a1.channels.c1.capacity = 1000
a1.channels.c1.transactionCapacity = 100

# Bind the source and sink to the channel
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1