Reprinted please indicate Source Address: http://blog.csdn.net/lastsweetop/article/details/9664233
All source code on GitHub, https://github.com/lastsweetop/styhadoopSchema defines schema in JSON format, including the following three forms: 1. JSON string type, mainly native type
2. JSON array, mainly Union
3. JSON object, format:{"type": "typeName" ...attributes...}Including native and Union types. attributes can include Avro-defined attributes that
(Facebook) Thrift/(Hadoop) Avro/(Google) probuf (GRPC) is a more eye-catching efficient serialization/RPC framework in recent years, although Dubbo Framework has thrift support, but the dependent version is earlier, only supports 0.8.0, and also makes some extensions to the protocol, not the native thrift protocol.On GitHub, though, there are friends who have extended support for Dubbo native thrift, but the code is too many, just need a class:Thrift2
1. Prepare documents:
Cmake-2.8.8-win32-x86.zip
Avro-cpp-1.7.1.tar.gz
Boost_000049_0.7z
2. The 64-bit boost lib Library requires only the three
Boost_filesystem.lib
Boost_system.lib
Boost_program_options.lib
During generation, perform operations on a common PC. In fact, 64-bit generation is not that difficult, just use a script. For details, see:
Compile_boost_000049 (64-bit). bat
For more information, see:
Http://blog.csdn.net/g
The Avro 1.8.2, released on May 15, already contains the JS version of the code.Tsinghua University Mirror Address:https://mirrors.tuna.tsinghua.edu.cn/apache/avro/avro-1.8.2/js/According to README.MD, run a simple example.Specific steps:1. Unzip the downloaded compressed package2. Under the package directory, create a simple file index.js with the following cont
[Spark] [Python]spark example of obtaining Dataframe from Avro fileGet the file from the following address:Https://github.com/databricks/spark-avro/raw/master/src/test/resources/episodes.avroImport into the HDFS system:HDFs Dfs-put Episodes.avroRead in:Mydata001=sqlcontext.read.format ("Com.databricks.spark.avro"). Load ("Episodes.avro")Interactive Run Results:In [7]: Mydata001=sqlcontext.read.format ("Com.
Like two communication to find a mutual understanding of the language, in the domestic for Putonghua, running abroad and more in English, two inter-process communication also need to find a data format that everyone can understand. Simple as JSON, XML, which is a self-descriptive format, XML has a schema definition, but there is no formal JSON schema specification. In the efficiency of the occasion, the text-based data interchange format can not meet the requirements, so there are binary Google
Serialization: Converts a structured object into a byte stream that enables communication in a system or networkNeed to store data in HBase for HadoopCommon serialization Systems
Thrift (Hive,hbase)
Protocol Buffer (Google)
Avro
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Requirements 1:android device comes with a keypad with nine keys, at which point the keypad is recognized as HW Keyboard, and the default and soft keyboard cannot coexist, requiring the soft keyboard to coexist with the physical keyboard.Realize:On the internet to find others summed up the Android5.1 solution, need to solve the codebase for Android6.0, can be use
First write, write Bad please forgive mePhysical keyboard mapping process:Mobile/SYSTEM/USR/KEYLAYOUT/*.KL: The kernel maps keycode to a meaningful stringKeycodelabels.h:framework map strings to KeyEvent KeyCodeFrameworks/.../res/values/attrs.xml-main parts: Android.jarFirst, the problem description:When the tablet connection on the Bluetooth scanner (external physical keyboard), you can not eject the soft
The keyboard appears in the hidden (solve the problem that the text box will be overwritten when the keyboard pops up, code implementation), the keyboard text box
Hide the keyboard (solve the problem that the text box will be overwritten when the keyboard pops up, and implem
Many times when using Uitextfield, handling the keyboard is a tricky issue. Question one: How do I hide my keyboard? Scenario 1. Change the bottom right corner of the keyboard line break (enter) key is the completion key, after the implementation of proxy method keyboard auto ReboundKeyboardcontroll.gifUitextfield *tex
123456789Ten One A theThe page has a div 100*100 color yellow press the keyboard and the left and right keys can operate div Mobile CTRL + keyboard up and down can zoom out CTRL + keyboard around keys can be randomly changed color
does the soft keyboard input password secure? is relative to manually enter the password to be more secure points, equivalent to a layer of password protection, because you can prevent the keyboard eavesdropping program. Soft keyboard is the input method with the on-screen keyboard, you find on the Input Panel to kno
Keyboard security problems and hazardsWith various hacker technologies, hackers can remotely control the installation of keyboard recording programs on users' computers. These tools, known as keyboard recorders, can record all information that users enter from the keyboard. As hacking technologies are increasingly open
Comments: Keyboard security problems and hazards through various hacker technologies, hackers can remotely control the installation of keyboard recording programs in users' computers, these tools, known as keyboard recorders, can record all information input from the keyboard. As hacking technologies are increasingly o
Android keyboard display and hide, android keyboard hide
I. do not automatically pop up the keyboard:
If the EditText control is used, the focus is automatically displayed for the first time, and the keyboard is displayed. If you do not want to automatically display the keyboard
Earlier this year, Apple officially released the 12-inch version of the retina MacBook Notebook, the new product in addition to the well-deserved Retina screen, its biggest feature is the use of the Butterfly keyboard architecture. However, for Apple's major innovation, most media in the evaluation of the time all pointed out that although the keyboard structure to enhance the overall look of the notebook,
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