Programmer Think

This is a reading note for Java 8 Actual, which takes about 5 minutes to read. It's a bit of a headline party, but that's what I feel when I recently used Lambda expressions.Design patterns are a summary of some good experience and routines from the past, but good language features allow developers to bypass them.Common object-oriented design p ...

Other blogger posts: http://blog.csdn.net/dhmpgt/article/details/9998321 Maven Tools for managing project jar packages automatically download the corresponding jar packages from the server library to the project based on the configuration file. Prepare the file: install 1) Unzip repository to D:/maven/repositoryserver as Maven loca ...

Bootstrap initialization process netty's client boot class is Bootstrap. Let's take a look at the initialization process of Bootstrap in the client part of spark's rpc. TransportClientFactory.createClient(InetSocketAddress address) Simply post out the Bootstrap initialization code // Client boot object Bootstrap bootstrap = new Bootstrap(); // ...

Shuffle Output Tracker As an auxiliary component of shuffle, this component plays an important role in the whole shuffle module. In the previous series of analyses, we mentioned this component more or less. For example, when DAGScheduler submits a stage, it encapsulates the stage as a TaskSet, but the possible partitions have been computed and ...

Through the introduction of Cluster-Singleton in the last part, we understand Akka's programming support for distributed programs: message-driven computing mode is particularly suitable for distributed programming, we do not need special efforts, just need to follow the normal Actor programming mode to achieve cluster distributed programs. Clus ...

We discussed FSM, an Actor specially designed to maintain internal state, which is characterized by a special DSL that can easily perform state transition. The state transition mode of FSM is particularly suitable for business processes in reality, because its DSL can describe business functions more vividly. In order to achieve the availabilit ...

The data stream of akka-stream can be composed of some components. These components are collectively called data flow graph Graph, which describes data flow and processing. Source,Flow,Sink are the most basic Graph. More complex composite Graph can be combined with basic Graph. If all ports of a Graph (input and output) are connected, then it i ...