An introduction to Apache Thrift

Apache Thrift
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What is it ?

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Languages

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Process

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Architecture

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Example

www.semtech-solutions.co.nz

info@semtech-solutions.co.nz

Apache Thrift – What is it ?
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A multi language software framework

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For client / services development

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It is scaleable

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Uses a compiler to generate source code

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Released with Apache 2 License

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Uses an IDL ( interface descripton language )

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Originally developed at Facebook



Apache Thrift – Languages
Languages supported
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C++

Cocoa

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Java

JavaScript

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Python

Node.js

–

PHP

Smalltalk

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Ruby

OCaml

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Erlang

Delphi

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Perl

..... and others

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Haskell

–

C#



Apache Thrift – Process
So how do we start to create a Thrift based app ?
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We define a Thrift file

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Which includes our interface definition
● Defines our Thrift types
● Defines our services
Our clients will be able to call our services

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We now use the Thrift compiler

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thrift --gen <language> <Thrift file>
To generate our source code

–

Now we add our extra client / server functionality

●

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Apache Thrift – Service



Apache Thrift – Where used ?
So who is using Thrift ?
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Cassandra

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Scribe

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Hadoop – Hbase

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ThriftDB

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Others .........



Apache Thrift
Architecture



Apache Thrift – Example (Java)
Create Thrift interface file
# time.thrift
namespace java tserver.gen
typedef i64 Timestamp
service TimeServer {
Timestamp time()
}

Compile to Java code
thrift --gen java time.thrift



Apache Thrift – Example
Create interface in TimeServerImpl.java
package server;
import org.apache.thrift.TException;
import tserver.gen.*;
class TimeServerImpl implements TimeServer.Iface {
@Override
public long time() throws TException {
long time = System.currentTimeMillis();
System.out.println("time() called: " + time);
return time;
}
}



Apache Thrift – Example – Java Server
package server;
import java.io.IOException;
import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.protocol.TBinaryProtocol.Factory;
import org.apache.thrift.server.TServer;
import org.apache.thrift.server.TThreadPoolServer;
import org.apache.thrift.transport.TServerSocket;
import org.apache.thrift.transport.TTransportException;
import tserver.gen.TimeServer;
public class Server {
private void start(){
try {
TServerSocket serverTransport = new TServerSocket(7911);
TimeServer.Processor processor = new TimeServer.Processor(new TimeServerImpl());
Factory protFactory = new TBinaryProtocol.Factory(true, true);
TServer server = new TThreadPoolServer(processor, serverTransport, protFactory);
System.out.println("Starting server on port 7911 ...");
server.serve();
} catch (TTransportException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String args[]){
Server srv = new Server(); srv.start();
}
}



Apache Thrift – Example – Java Client
package client;
import java.net.SocketException;
import org.apache.thrift.TException;
import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TSocket;
import org.apache.thrift.transport.TTransport;
import org.apache.thrift.transport.TTransportException;
import tserver.gen.TimeServer.Client;
public class TimeClient {
private void start(){
TTransport transport;
try {
transport = new TSocket("localhost", 7911);
TProtocol protocol = new TBinaryProtocol(transport);Client client = new Client(protocol);
transport.open();
long time = client.time();
System.out.println("Time from server:" + time);
transport.close();
}
catch (SocketException e) { e.printStackTrace(); }
catch (TTransportException e) { e.printStackTrace();}
catch (TException e) { e.printStackTrace(); }
}
public static void main(String[] args) {
TimeClient c = new TimeClient();
c.start();
}
}



Contact Us
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●

We offer IT project consultancy

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We are happy to hear about your problems

●

You can just pay for those hours that you need

●

To solve your problems

An introduction to Apache Thrift

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