Thrift is an extensible cross-language remote service invocation framework.
Thrift uses the interface description language to define the interface and data type of RPC, and then generates codes in different languages (Java, C++, C#, PHP, etc.) through a compiler, and the generated code is responsible for the RPC protocol layer (Protocol) and the transport layer (Transport) implementation. Among them, the protocol layer defines the data transmission format (such as binary, XML, JSON, etc.), and the transport layer defines the data transmission method (such as TCP/IP transmission, memory sharing, file sharing, etc.).
Thrift is a concrete implementation of IDL (Interface Definition Language) descriptive language.
In Thrift, calling a method that returns a null value directly throws a TApplicationException.
Thrift can generate the server-side code in Java language and the client-side code in C++ language from the interface definition file through the code generation tool, so as to realize cross-language support between the server and the client.
Download the installation package: http://thrift.apache.org/download
Development package download: http://repo1.maven.org/maven2/org/apache/thrift/libthrift/
Steps to install Thrift under Windows:
Create a new folder named thrift under the D drive, copy the thrift-0.9.3.exe file to the folder, and rename it to thrift.exe
Configure the Path environment variable and append at the end of the variable; D:\thrift
Execute thrift -version in the DOS window, if the version number of Thrift is output, the installation is successful
Generate target language code:
Write Hello.thrift interface description file
Copy the Hello.thrift file to the D:\thrift directory
Execute the command thrift --gen java Hello.thrift, the Hello.java file will be generated
Thrift communication protocol:
TBinaryProtocol: binary format
TCompactProtocol: Compression format
TJSONProtocol: JSON protocol
TSimpleJSONProtocol: Provides a JSON write-only protocol, suitable for parsing through scripting languages
Thrift transfer method
TSocket: uses blocking I/O for transmission, the most common mode
TNonblockingTransport: Use a non-blocking method for building asynchronous clients
TFramedTransport: transmits in frame units and is used in non-blocking services. Similar to TBufferedTransport, it also buffers related data. At the same time, it supports fixed-length data transmission and reception.
TFileTransport: file (log) transmission class, allowing the client to pass the file to the server, allowing the server to write the received data to the file
THttpTransport: use Http transport protocol for data transmission
TZlibTransport: use zlib for compression, used in conjunction with other transports
TBufferedTransport: Buffer the data operated by a Transport object, that is, read data from the buffer for transmission, or write the data directly to the buffer
TMemoryTransport: uses memory for I/O. The java implementation actually uses a simple ByteArrayOutputStream internally
Thrift server type
TSimpleServer: A blocking single-threaded service model, often used for testing
TThreadedServer: A blocking multi-threaded service model, creating a thread for each request
TNonblockingServer: non-blocking multi-threaded service model (requires TFramedTransport data transmission method)
TThreadPoolServer: A blocking thread pool service model that pre-creates a set of threads to process requests
THsHaServer: Semi-synchronous and semi-asynchronous service model (requires TFramedTransport data transmission method)
TThreadedSelectorServer：