- 断线重连
- 一对一请求
- 通知、粘性通知
- 串行请求合并
- 包分片处理(AbstractFragmentRequestQueue)
- 缓存
- 拦截器
- 支持rxjava，提供类似于retrofit的支持
Maven
<dependency>
<groupId>com.github.typ0520</groupId>
<artifactId>bizsocket-rx</artifactId>
<version>1.0.0</version>
</dependency>
or Gradle
buildscript {
repositories {
jcenter()
}
}
dependencies {
compile 'com.github.typ0520:bizsocket-rx:1.0.0'
}如果想使用此库，客户端和服务器的通讯协议中必须要有命令号、包序列号这两个字段
- 命令号代表请求类型，可以想象成http中url的作用
- 包序列号是数据包的唯一索引，客户端发起请求时为数据包生成一个唯一索引，服务器返回请求对应的结果时把这个包序列号带回去
协议可以类似于下面这种：
| cmd | packetId | contentLength | content |
|---|---|---|---|
| int | int | int | byte[] |
也可以类似于下面这样的每个数据包都是一段json字符串，包与包之间用换行符分割
{"cmd": xxx , "packetId": xxx , ...... } 数据包的创建是通过这两个抽象类PacketFactory、Packet，整个库的数据流转都是通过命令号、包序列号这两个字段来完成的，字段名、出现的位置以及形式不限，只要有这两个字段就适用此库
sample中client与server之间的通讯协议是
| length(int) | cmd(int) | seq(int) | content(byte[]) |
|---|---|---|---|
| 数据包的总长度 | 命令号 | 数据包的唯一索引 | 报文体，可以想象成http协议中的body |
下面的代码片段来自sample，建议把代码拉下来看
- 1、 首先需要创建一个数据包类继承自Packet
public class SamplePacket extends Packet {
static volatile int currentSeq = 0;
public int length;
public int cmd;
public int seq;
public String content;
@Override
public int getCommand() {
//覆盖父类的抽象方法
return cmd;
}
@Override
public String getPacketID() {
//覆盖父类的抽象方法
return String.valueOf(seq);
}
//获取请求数据包byte[]，写给服务器
public byte[] toBytes() {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
BufferedSink bufferedSink = Okio.buffer(Okio.sink(bos));
try {
//包长 = 内容长度 + 包头固定的12个字节
ByteString byteString = ByteString.encodeUtf8(content);
bufferedSink.writeInt(byteString.size() + 12);
bufferedSink.writeInt(cmd);
bufferedSink.writeInt(seq);
bufferedSink.write(byteString);
bufferedSink.flush();
} catch (IOException e) {
e.printStackTrace();
}
return bos.toByteArray();
}
}- 2、创建PacketFactory，主要用来从流中解析出server发给client的数据包
public class SamplePacketFactory extends PacketFactory {
@Override
public Packet getRequestPacket(Packet reusable,Request request) {
return new SamplePacket(request.command(),request.body());
}
@Override
public Packet getHeartBeatPacket(Packet reusable) {
return new SamplePacket(SampleCmd.HEARTBEAT.getValue(), ByteString.encodeUtf8("{}"));
}
@Override
public Packet getRemotePacket(Packet reusable,BufferedSource source) throws IOException {
SamplePacket packet = new SamplePacket();
packet.length = reader.readInt();
packet.cmd = reader.readInt();
packet.seq = reader.readInt();
//减去协议头的12个字节长度
packet.content = reader.readString(packet.length - 12, Charset.forName("utf-8"));
return packet;
}
}- 3、配置client
public class SampleClient extends AbstractBizSocket {
public SampleClient(Configuration configuration) {
super(configuration);
}
@Override
protected PacketFactory createPacketFactory() {
return new SamplePacketFactory();
}
}- 3、启动client，以j2se为例写一个main方法
public static void main(String[] args) {
SampleClient client = new SampleClient(new Configuration.Builder()
.host("127.0.0.1")
.port(9103)
.readTimeout(TimeUnit.SECONDS,30)
.heartbeat(60)
.build());
client.getInterceptorChain().addInterceptor(new Interceptor() {
@Override
public boolean postRequestHandle(RequestContext context) throws Exception {
System.out.println("发现一个请求postRequestHandle: " + context);
return false;
}
@Override
public boolean postResponseHandle(int command, Packet responsePacket) throws Exception {
System.out.println("收到一个包postResponseHandle: " + responsePacket);
return false;
}
});
try {
//连接
client.connect();
//启动断线重连
client.getSocketConnection().bindReconnectionManager();
//开启心跳
client.getSocketConnection().startHeartBeat();
} catch (Exception e) {
e.printStackTrace();
}
//注册通知，接收服务端的推送
client.subscribe(client, SampleCmd.NOTIFY_PRICE.getValue(), new ResponseHandler() {
@Override
public void sendSuccessMessage(int command, ByteString requestBody, Packet responsePacket) {
System.out.println("cmd: " + command + " ,requestBody: " + requestBody + " responsePacket: " + responsePacket);
}
@Override
public void sendFailureMessage(int command, Throwable error) {
System.out.println(command + " ,err: " + error);
}
});
//发起一对一请求
String json = "{\"productId\" : \"1\",\"isJuan\" : \"0\",\"type\" : \"2\",\"sl\" : \"1\"}";
client.request(new Request.Builder().command(SampleCmd.CREATE_ORDER.getValue()).utf8body(json).build(), new ResponseHandler() {
@Override
public void sendSuccessMessage(int command, ByteString requestBody, Packet responsePacket) {
System.out.println("cmd: " + command + " ,requestBody: " + requestBody + " attach: " + " responsePacket: " + responsePacket);
}
@Override
public void sendFailureMessage(int command, Throwable error) {
System.out.println(command + " ,err: " + error);
}
});
//如果想用rxjava的形式调用也是支持的,提供了类似于retrofit通过动态代理创建的service类来调用
BizSocketRxSupport rxSupport = new BizSocketRxSupport.Builder()
.requestConverter(new JSONRequestConverter())
.requestConverter(new JSONRequestConverter())
.bizSocket(client)
.build();
SampleService service = rxSupport.create(SampleService.class);
JSONObject params = new JSONObject();
try {
params.put("pageSize","10000");
} catch (JSONException e) {
e.printStackTrace();
}
service.queryOrderList(params).subscribe(new Subscriber<JSONObject>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
}
@Override
public void onNext(JSONObject jsonObject) {
System.out.println("rx response: " + jsonObject);
}
});
//阻塞主线程，防止程序退出，可以想象成android中的Looper类
while (true) {
try {
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}