序列化和反序列化
- Maven:Pom.xml
<dependencies>
<dependency>
<groupId>org.apache.avro</groupId>
<artifactId>avro</artifactId>
<version>1.8.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.avro</groupId>
<artifactId>avro-maven-plugin</artifactId>
<version>1.8.1</version>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>schema</goal>
</goals>
<configuration>
<sourceDirectory>${project.basedir}/src/main/avro/</sourceDirectory>
<outputDirectory>${project.basedir}/src/main/java/</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>- Avro:MapAvro.avsc
{
"type":"record",
"namespace":"com.qidai",
"name":"Employee",
"doc":"Test Employee bean",
"fields":[
{"name":"id","type":["null","int"]},
{"name":"name","type":["null","string"]},
{"name":"age","type":["null","int"]},
{"name":"gender","type":["null","string"]}
]
}- 添加完依赖后直接点击maven插件install即可，就会产生对应的class
- 序列化和反序列化(使用javaclass)
@Test
public void ser() throws Exception {
Employee employee = Employee.newBuilder().setAge(12).setGender("NAN").setId(1).setName("tom").build();
DatumWriter<Employee> employeeDatumWriter = new SpecificDatumWriter<>(Employee.class);
DataFileWriter<Employee> dataFileWriter = new DataFileWriter<>(employeeDatumWriter);
dataFileWriter.create(employee.getSchema(), new File("emp.avro"));
dataFileWriter.append(employee);
dataFileWriter.close();
}
@Test
public void deSer() throws Exception {
DatumReader<Employee> employeeDatumReader = new SpecificDatumReader<>(Employee.class);
DataFileReader<Employee> dataFileReader = new DataFileReader<>(new File("emp.avro"), employeeDatumReader);
Employee employee = null;
while (dataFileReader.hasNext()) {
employee = dataFileReader.next();
System.out.println(employee);
}
}- 序列化反序列化(直接使用avro文件)
@Test
public void ser() throws Exception {
Schema schema = new Schema.Parser().parse(new File("emp.avsc"));
GenericRecord empRecord1 = new GenericData.Record(schema);
empRecord1.put("id", 1);
empRecord1.put("name", "Ben");
empRecord1.put("age", 7);
empRecord1.put("gender", "nv");
File file = new File("empser.avro");
DatumWriter<GenericRecord> datumWriter = new GenericDatumWriter<>(schema);
DataFileWriter<GenericRecord> dataFileWriter = new DataFileWriter<>(datumWriter);
dataFileWriter.create(schema, file);
dataFileWriter.append(empRecord1);
dataFileWriter.close();
}
@Test
public void deSer() throws Exception {
//指定avro格式文件
Schema schema = new Schema.Parser().parse(new File("emp.avsc"));
//指定序列化好的数据文件
File file = new File("empser.avro");
DatumReader<GenericRecord> datumReader = new GenericDatumReader<>(schema);
DataFileReader<GenericRecord> dataFileReader = new DataFileReader<>(file, datumReader);
GenericRecord emp = null;
while (dataFileReader.hasNext()) {
emp = dataFileReader.next();
System.out.println(emp);
}
}RPC实现
- 编写avsc文件：user.avsc，作为要发送的实体类
{
"namespace":"com.qidai.bean",
"name":"User",
"doc":"test rpc class",
"type":"record",
"fields":[
{"name":"name","type":["string","null"]},
{"name":"age","type":["int","null"]},
{"name":"date","type":["string","null"]}
]
}- 编写协议文件:protomes.avdl
@namespace("com.qidai.proto")
protocol UserProtocol{
import schema "user.avsc";
string sendMes(com.qidai.bean.User user); //对应协议中的方法
}- 编写完毕之后检查maven pom文件
<dependencies>
<dependency>
<groupId>org.apache.avro</groupId>
<artifactId>avro</artifactId>
<version>1.8.2</version>
</dependency>
<dependency>
<groupId>org.apache.avro</groupId>
<artifactId>avro-ipc</artifactId>
<version>1.8.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.avro</groupId>
<artifactId>avro-maven-plugin</artifactId>
<version>1.8.1</version>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>schema</goal>
<goal>idl-protocol</goal>
</goals>
<configuration>
<sourceDirectory>${project.basedir}/src/main/avro/</sourceDirectory>
<outputDirectory>${project.basedir}/src/main/java/</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>- 检查没错之后，直接插件install生成avro类
- 生成之后会看到一个User的传输类，还有一个proto包下的协议接口
- 实现协议接口，重写自己的逻辑：server
public class UserProtocolImpl implements UserProtocol {
@Override
public CharSequence sendMes(User user) throws AvroRemoteException {
System.out.println("Server --> 接收" + user.toString());
return "Client sendMes " + user.toString();
}
}- 实现协议接口，重写自己的逻辑：client
public class UserProtocolImpl implements UserProtocol {
@Override
public CharSequence sendMes(User user) throws AvroRemoteException {
System.out.println("Client --> 发送" + user.toString());
return "Client sendMes " + user.toString();
}
}- 编写serverApp
public class ServerApp {
public static void main(String[] args) throws IOException, InterruptedException {
Responder responder = new SpecificResponder(UserProtocol.class,new UserProtocolImpl());
SaslSocketServer server = new SaslSocketServer(responder,new InetSocketAddress(9999));
server.start();
Thread.sleep(5000000);
}
}- 编写clientApp
public class ClientApp {
public static void main(String[] args) throws IOException {
SaslSocketTransceiver transceiver = new SaslSocketTransceiver(new InetSocketAddress(9999));
UserProtocol client = SpecificRequestor.getClient(UserProtocol.class, transceiver);
Scanner scanner = new Scanner(System.in);
while (scanner.next() != null) {
User user = new User();
user.setName("xiaofen");
System.out.println(client.sendMes(user));
}
}
}-
测试：先启动serverApp，然后启动clientApp，这时候在client的console中输入任意值，会发现服务端和客户端都会输出消息
- server
Server --> {"name": "xiaofen", "age": null, "date": null} Server --> {"name": "xiaofen", "age": null, "date": null} Server --> {"name": "xiaofen", "age": null, "date": null} Server --> {"name": "xiaofen", "age": null, "date": null} Server --> {"name": "xiaofen", "age": null, "date": null} Server --> {"name": "xiaofen", "age": null, "date": null} Server --> {"name": "xiaofen", "age": null, "date": null}- client
1 Client sendMes {"name": "xiaofen", "age": null, "date": null} 1 Client sendMes {"name": "xiaofen", "age": null, "date": null} 1 Client sendMes {"name": "xiaofen", "age": null, "date": null} 1 Client sendMes {"name": "xiaofen", "age": null, "date": null} 1 Client sendMes {"name": "xiaofen", "age": null, "date": null} 1 Client sendMes {"name": "xiaofen", "age": null, "date": null} 1 Client sendMes {"name": "xiaofen", "age": null, "date": null} - 对于server的client的实现有如下几种
1.基于jetty的http实现:HttpServer 和HttpTransceiver
2.基于netty的实现:NettyServer和NettyTransceiver
3.基于TCP的实现:SocketServer和SocketTransceiver
4.基于UDP的实现:DatagramServer和DatagramTransceiver
5.基于加密的TCP实现:SaslSocketServer和SaslSocketTransceiver
