A simple RPC mechanism.A protocol is a Java interface. All parameters and return types must be one of:a primitive type(这个注意是9个基本类型,包括void),a String ; or a Writable or an array of the above types All methods in the protocol should throw only IOExce…
1.An abstract IPC service. IPC calls take a single {@link Writable} as a parameter, and return a {@link Writable} as their value. A service runs on a port and is defined by a parameter class and a value class. 2.共有5个内部类ExceptionsHandler,Call,Listen…
这几年云计算大数据非常火,借这个东风.今天開始学习apache的分布式计算框架hadoop,希望不要太落后. Hadoop说明 对于hadoop.apache官方wiki给出的说明为 Apache Hadoop is a framework for running applications on large cluster built of commodity hardware. The Hadoop framework transparently provides applications b…