基于zookeeper、连接池、Failover/LoadBalance等改造Thrift 服务化

对于Thrift服务化的改造，主要是客户端，可以从如下几个方面进行：

1.服务端的服务注册，客户端自动发现，无需手工修改配置，这里我们使用zookeeper，但由于zookeeper本身提供的客户端使用较为复杂，因此采用curator-recipes工具类进行处理服务的注册与发现。

2.客户端使用连接池对服务调用进行管理，提升性能，这里我们使用Apache Commons项目commons-pool，可以大大减少代码的复杂度。

3.关于Failover/LoadBalance，由于zookeeper的watcher，当服务端不可用是及时通知客户端，并移除不可用的服务节点，而LoadBalance有很多算法，这里我们采用随机加权方式，也是常有的负载算法，至于其他的算法介绍参考:常见的负载均衡的基本算法。

4.使thrift服务的注册和发现可以基于spring配置,可以提供很多的便利。

5.其他的改造如：

1）通过动态代理实现client和server端的交互细节透明化，让用户只需通过服务方提供的接口进行访问

2）Thrift通过两种方式调用服务Client和Iface

1. // *) Client API 调用
2. (EchoService.Client)client.echo("hello lilei");  ---(1)
3. // *) Service 接口 调用
4. (EchoService.Iface)service.echo("hello lilei");  ---(2)

// *) Client API 调用
(EchoService.Client)client.echo("hello lilei");  ---(1)
// *) Service 接口 调用
(EchoService.Iface)service.echo("hello lilei");  ---(2)

Client API的方式, 不推荐, 我们推荐Service接口的方式(服务化)。

下面我们来一一实现：

一、pom.xml引入依赖jar包

1. <dependency>
2. <groupId>org.apache.thrift</groupId>
3. <artifactId>libthrift</artifactId>
4. <version>0.9.2</version>
5. </dependency>
6. <dependency>
7. <groupId>commons-pool</groupId>
8. <artifactId>commons-pool</artifactId>
9. <version>1.6</version>
10. </dependency>
11. <dependency>
12. <groupId>org.springframework</groupId>
13. <artifactId>spring-context</artifactId>
14. <version>4.0.9.RELEASE</version>
15. </dependency>
16. <dependency>
17. <groupId>org.apache.zookeeper</groupId>
18. <artifactId>zookeeper</artifactId>
19. <version>3.4.6</version>
20. </dependency>
21. <dependency>
22. <groupId>org.apache.curator</groupId>
23. <artifactId>curator-recipes</artifactId>
24. <version>2.7.1</version>
25. </dependency>

<dependency>
			<groupId>org.apache.thrift</groupId>
			<artifactId>libthrift</artifactId>
			<version>0.9.2</version>
		</dependency>
		<dependency>
			<groupId>commons-pool</groupId>
			<artifactId>commons-pool</artifactId>
			<version>1.6</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>4.0.9.RELEASE</version>
		</dependency>

		<dependency>
			<groupId>org.apache.zookeeper</groupId>
			<artifactId>zookeeper</artifactId>
			<version>3.4.6</version>
		</dependency>
		<dependency>
			<groupId>org.apache.curator</groupId>
			<artifactId>curator-recipes</artifactId>
			<version>2.7.1</version>
		</dependency>

二、使用zookeeper管理服务节点配置

RPC服务往平台化的方向发展, 会屏蔽掉更多的服务细节(服务的IP地址集群, 集群的扩容和迁移), 只暴露服务接口. 这部分的演化, 使得server端和client端完全的解耦合. 两者的交互通过ConfigServer(MetaServer)的中介角色来搭线。

注: 该图源自dubbo的官网
这边借助Zookeeper来扮演该角色, server扮演发布者的角色, 而client扮演订阅者的角色.

Zookeeper是分布式应用协作服务. 它实现了paxos的一致性算法, 在命名管理/配置推送/数据同步/主从切换方面扮演重要的角色。 其数据组织类似文件系统的目录结构:

每个节点被称为znode, 为znode节点依据其特性, 又可以分为如下类型:
　　1). PERSISTENT: 永久节点
　　2). EPHEMERAL: 临时节点, 会随session(client disconnect)的消失而消失
　　3). PERSISTENT_SEQUENTIAL: 永久节点, 其节点的名字编号是单调递增的
　　4). EPHEMERAL_SEQUENTIAL: 临时节点, 其节点的名字编号是单调递增的
　　注: 临时节点不能成为父节点
　　Watcher观察模式, client可以注册对节点的状态/内容变更的事件回调机制. 其Event事件的两类属性需要关注下:
　　1). KeeperState: Disconnected,SyncConnected,Expired
　　2). EventType: None,NodeCreated,NodeDeleted,NodeDataChanged,NodeChildrenChanged
RPC服务端:
　　作为具体业务服务的RPC服务发布方, 对其自身的服务描述由以下元素构成.
　　1). namespace: 命名空间，来区分不同应用 
　　2). service: 服务接口, 采用发布方的类全名来表示
　　3). version: 版本号
　　借鉴了Maven的GAV坐标系, 三维坐标系更符合服务平台化的大环境.
　　*) 数据模型的设计
　　具体RPC服务的注册路径为: /rpc/{namespace}/{service}/{version}, 该路径上的节点都是永久节点
　　RPC服务集群节点的注册路径为: /rpc/{namespace}/{service}/{version}/{ip:port:weight}, 末尾的节点是临时节点.

1.定义Zookeeper的客户端的管理

ZookeeperFactory.java

1. package cn.slimsmart.thrift.rpc.zookeeper;
2. import org.apache.curator.framework.CuratorFramework;
3. import org.apache.curator.framework.CuratorFrameworkFactory;
4. import org.apache.curator.retry.ExponentialBackoffRetry;
5. import org.springframework.beans.factory.FactoryBean;
6. import org.springframework.util.StringUtils;
7. /**
8. * 获取zookeeper客户端链接
9. */
10. public class ZookeeperFactory implements FactoryBean<CuratorFramework> {
11. private String zkHosts;
12. // session超时
13. private int sessionTimeout = 30000;
14. private int connectionTimeout = 30000;
15. // 共享一个zk链接
16. private boolean singleton = true;
17. // 全局path前缀,常用来区分不同的应用
18. private String namespace;
19. private final static String ROOT = "rpc";
20. private CuratorFramework zkClient;
21. public void setZkHosts(String zkHosts) {
22. this.zkHosts = zkHosts;
23. }
24. public void setSessionTimeout(int sessionTimeout) {
25. this.sessionTimeout = sessionTimeout;
26. }
27. public void setConnectionTimeout(int connectionTimeout) {
28. this.connectionTimeout = connectionTimeout;
29. }
30. public void setSingleton(boolean singleton) {
31. this.singleton = singleton;
32. }
33. public void setNamespace(String namespace) {
34. this.namespace = namespace;
35. }
36. public void setZkClient(CuratorFramework zkClient) {
37. this.zkClient = zkClient;
38. }
39. @Override
40. public CuratorFramework getObject() throws Exception {
41. if (singleton) {
42. if (zkClient == null) {
43. zkClient = create();
44. zkClient.start();
45. }
46. return zkClient;
47. }
48. return create();
49. }
50. @Override
51. public Class<?> getObjectType() {
52. return CuratorFramework.class;
53. }
54. @Override
55. public boolean isSingleton() {
56. return singleton;
57. }
58. public CuratorFramework create() throws Exception {
59. if (StringUtils.isEmpty(namespace)) {
60. namespace = ROOT;
61. } else {
62. namespace = ROOT +"/"+ namespace;
63. }
64. return create(zkHosts, sessionTimeout, connectionTimeout, namespace);
65. }
66. public static CuratorFramework create(String connectString, int sessionTimeout, int connectionTimeout, String namespace) {
67. CuratorFrameworkFactory.Builder builder = CuratorFrameworkFactory.builder();
68. return builder.connectString(connectString).sessionTimeoutMs(sessionTimeout).connectionTimeoutMs(30000)
69. .canBeReadOnly(true).namespace(namespace).retryPolicy(new ExponentialBackoffRetry(1000, Integer.MAX_VALUE))
70. .defaultData(null).build();
71. }
72. public void close() {
73. if (zkClient != null) {
74. zkClient.close();
75. }
76. }
77. }

package cn.slimsmart.thrift.rpc.zookeeper;

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.util.StringUtils;

/**
 * 获取zookeeper客户端链接
 */
public class ZookeeperFactory implements FactoryBean<CuratorFramework> {

	private String zkHosts;
	// session超时
	private int sessionTimeout = 30000;
	private int connectionTimeout = 30000;

	// 共享一个zk链接
	private boolean singleton = true;

	// 全局path前缀,常用来区分不同的应用
	private String namespace;

	private final static String ROOT = "rpc";

	private CuratorFramework zkClient;

	public void setZkHosts(String zkHosts) {
		this.zkHosts = zkHosts;
	}

	public void setSessionTimeout(int sessionTimeout) {
		this.sessionTimeout = sessionTimeout;
	}

	public void setConnectionTimeout(int connectionTimeout) {
		this.connectionTimeout = connectionTimeout;
	}

	public void setSingleton(boolean singleton) {
		this.singleton = singleton;
	}

	public void setNamespace(String namespace) {
		this.namespace = namespace;
	}

	public void setZkClient(CuratorFramework zkClient) {
		this.zkClient = zkClient;
	}

	@Override
	public CuratorFramework getObject() throws Exception {
		if (singleton) {
			if (zkClient == null) {
				zkClient = create();
				zkClient.start();
			}
			return zkClient;
		}
		return create();
	}

	@Override
	public Class<?> getObjectType() {
		return CuratorFramework.class;
	}

	@Override
	public boolean isSingleton() {
		return singleton;
	}

	public CuratorFramework create() throws Exception {
		if (StringUtils.isEmpty(namespace)) {
			namespace = ROOT;
		} else {
			namespace = ROOT +"/"+ namespace;
		}
		return create(zkHosts, sessionTimeout, connectionTimeout, namespace);
	}

	public static CuratorFramework create(String connectString, int sessionTimeout, int connectionTimeout, String namespace) {
		CuratorFrameworkFactory.Builder builder = CuratorFrameworkFactory.builder();
		return builder.connectString(connectString).sessionTimeoutMs(sessionTimeout).connectionTimeoutMs(30000)
				.canBeReadOnly(true).namespace(namespace).retryPolicy(new ExponentialBackoffRetry(1000, Integer.MAX_VALUE))
				.defaultData(null).build();
	}

	public void close() {
		if (zkClient != null) {
			zkClient.close();
		}
	}
}

2.服务端注册服务

由于服务端配置需要获取本机的IP地址，因此定义IP获取接口

ThriftServerIpResolve.java

1. package cn.slimsmart.thrift.rpc.zookeeper;
2. /**
3. *
4. * 解析thrift-server端IP地址，用于注册服务
5. * 1) 可以从一个物理机器或者虚机的特殊文件中解析
6. * 2) 可以获取指定网卡序号的Ip
7. * 3) 其他
8. */
9. public interface ThriftServerIpResolve {
10. String getServerIp() throws Exception;
11. void reset();
12. //当IP变更时,将会调用reset方法
13. static interface IpRestCalllBack{
14. public void rest(String newIp);
15. }
16. }

package cn.slimsmart.thrift.rpc.zookeeper;

/**
 *
 * 解析thrift-server端IP地址，用于注册服务
 * 1) 可以从一个物理机器或者虚机的特殊文件中解析
 * 2) 可以获取指定网卡序号的Ip
 * 3) 其他
 */
public interface ThriftServerIpResolve {

	String getServerIp() throws Exception;

	void reset();

	//当IP变更时,将会调用reset方法
	static interface IpRestCalllBack{
		public void rest(String newIp);
	}
}

可以对该接口做不通的实现，下面我们基于网卡获取IP地址，也可以通过配置serverIp
ThriftServerIpLocalNetworkResolve.java

1. package cn.slimsmart.thrift.rpc.zookeeper;
2. import java.net.Inet6Address;
3. import java.net.InetAddress;
4. import java.net.NetworkInterface;
5. import java.net.SocketException;
6. import java.util.Enumeration;
7. import org.slf4j.Logger;
8. import org.slf4j.LoggerFactory;
9. /**
10. * 解析网卡Ip
11. *
12. */
13. public class ThriftServerIpLocalNetworkResolve implements ThriftServerIpResolve {
14. private Logger logger = LoggerFactory.getLogger(getClass());
15. //缓存
16. private String serverIp;
17. public void setServerIp(String serverIp) {
18. this.serverIp = serverIp;
19. }
20. @Override
21. public String getServerIp() {
22. if (serverIp != null) {
23. return serverIp;
24. }
25. // 一个主机有多个网络接口
26. try {
27. Enumeration<NetworkInterface> netInterfaces = NetworkInterface.getNetworkInterfaces();
28. while (netInterfaces.hasMoreElements()) {
29. NetworkInterface netInterface = netInterfaces.nextElement();
30. // 每个网络接口,都会有多个"网络地址",比如一定会有lookback地址,会有siteLocal地址等.以及IPV4或者IPV6 .
31. Enumeration<InetAddress> addresses = netInterface.getInetAddresses();
32. while (addresses.hasMoreElements()) {
33. InetAddress address = addresses.nextElement();
34. if(address instanceof Inet6Address){
35. continue;
36. }
37. if (address.isSiteLocalAddress() && !address.isLoopbackAddress()) {
38. serverIp = address.getHostAddress();
39. logger.info("resolve server ip :"+ serverIp);
40. continue;
41. }
42. }
43. }
44. } catch (SocketException e) {
45. e.printStackTrace();
46. }
47. return serverIp;
48. }
49. @Override
50. public void reset() {
51. serverIp = null;
52. }
53. }

package cn.slimsmart.thrift.rpc.zookeeper;

import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 解析网卡Ip
 *
 */
public class ThriftServerIpLocalNetworkResolve implements ThriftServerIpResolve {

	private Logger logger = LoggerFactory.getLogger(getClass());

	//缓存
	private String serverIp;

	public void setServerIp(String serverIp) {
		this.serverIp = serverIp;
	}

	@Override
	public String getServerIp() {
		if (serverIp != null) {
			return serverIp;
		}
		// 一个主机有多个网络接口
		try {
			Enumeration<NetworkInterface> netInterfaces = NetworkInterface.getNetworkInterfaces();
			while (netInterfaces.hasMoreElements()) {
				NetworkInterface netInterface = netInterfaces.nextElement();
				// 每个网络接口,都会有多个"网络地址",比如一定会有lookback地址,会有siteLocal地址等.以及IPV4或者IPV6 .
				Enumeration<InetAddress> addresses = netInterface.getInetAddresses();
				while (addresses.hasMoreElements()) {
					InetAddress address = addresses.nextElement();
					if(address instanceof Inet6Address){
						continue;
					}
					if (address.isSiteLocalAddress() && !address.isLoopbackAddress()) {
						serverIp = address.getHostAddress();
						logger.info("resolve server ip :"+ serverIp);
						continue;
					}
				}
			}
		} catch (SocketException e) {
			e.printStackTrace();
		}
		return serverIp;
	}

	@Override
	public void reset() {
		serverIp = null;
	}
}

接下来我们定义发布服务接口，并实现将服务信息（服务接口、版本号，IP、port、weight）发布到zookeeper中。
ThriftServerAddressRegister.java

1. package cn.slimsmart.thrift.rpc.zookeeper;
2. /**
3. * 发布服务地址及端口到服务注册中心，这里是zookeeper服务器
4. */
5. public interface ThriftServerAddressRegister {
6. /**
7. * 发布服务接口
8. * @param service 服务接口名称，一个产品中不能重复
9. * @param version 服务接口的版本号，默认1.0.0
10. * @param address 服务发布的地址和端口
11. */
12. void register(String service,String version,String address);
13. }

package cn.slimsmart.thrift.rpc.zookeeper;

/**
 * 发布服务地址及端口到服务注册中心，这里是zookeeper服务器
 */
public interface ThriftServerAddressRegister {
	/**
	 * 发布服务接口
	 * @param service 服务接口名称，一个产品中不能重复
	 * @param version 服务接口的版本号，默认1.0.0
	 * @param address 服务发布的地址和端口
	 */
	void register(String service,String version,String address);
}

实现：ThriftServerAddressRegisterZookeeper.java

1. package cn.slimsmart.thrift.rpc.zookeeper;
2. import java.io.UnsupportedEncodingException;
3. import org.apache.curator.framework.CuratorFramework;
4. import org.apache.curator.framework.imps.CuratorFrameworkState;
5. import org.apache.zookeeper.CreateMode;
6. import org.slf4j.Logger;
7. import org.slf4j.LoggerFactory;
8. import org.springframework.util.StringUtils;
9. import cn.slimsmart.thrift.rpc.ThriftException;
10. /**
11. *  注册服务列表到Zookeeper
12. */
13. public class ThriftServerAddressRegisterZookeeper implements ThriftServerAddressRegister{
14. private Logger logger = LoggerFactory.getLogger(getClass());
15. private CuratorFramework zkClient;
16. public ThriftServerAddressRegisterZookeeper(){}
17. public ThriftServerAddressRegisterZookeeper(CuratorFramework zkClient){
18. this.zkClient = zkClient;
19. }
20. public void setZkClient(CuratorFramework zkClient) {
21. this.zkClient = zkClient;
22. }
23. @Override
24. public void register(String service, String version, String address) {
25. if(zkClient.getState() == CuratorFrameworkState.LATENT){
26. zkClient.start();
27. }
28. if(StringUtils.isEmpty(version)){
29. version="1.0.0";
30. }
31. //临时节点
32. try {
33. zkClient.create()
34. .creatingParentsIfNeeded()
35. .withMode(CreateMode.EPHEMERAL)
36. .forPath("/"+service+"/"+version+"/"+address);
37. } catch (UnsupportedEncodingException e) {
38. logger.error("register service address to zookeeper exception:{}",e);
39. throw new ThriftException("register service address to zookeeper exception: address UnsupportedEncodingException", e);
40. } catch (Exception e) {
41. logger.error("register service address to zookeeper exception:{}",e);
42. throw new ThriftException("register service address to zookeeper exception:{}", e);
43. }
44. }
45. public void close(){
46. zkClient.close();
47. }
48. }

package cn.slimsmart.thrift.rpc.zookeeper;

import java.io.UnsupportedEncodingException;

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.imps.CuratorFrameworkState;
import org.apache.zookeeper.CreateMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.StringUtils;

import cn.slimsmart.thrift.rpc.ThriftException;

/**
 *  注册服务列表到Zookeeper
 */
public class ThriftServerAddressRegisterZookeeper implements ThriftServerAddressRegister{

	private Logger logger = LoggerFactory.getLogger(getClass());

	private CuratorFramework zkClient;

	public ThriftServerAddressRegisterZookeeper(){}

	public ThriftServerAddressRegisterZookeeper(CuratorFramework zkClient){
		this.zkClient = zkClient;
	}

	public void setZkClient(CuratorFramework zkClient) {
		this.zkClient = zkClient;
	}

	@Override
	public void register(String service, String version, String address) {
		if(zkClient.getState() == CuratorFrameworkState.LATENT){
			zkClient.start();
		}
		if(StringUtils.isEmpty(version)){
			version="1.0.0";
		}
		//临时节点
		try {
			zkClient.create()
				.creatingParentsIfNeeded()
				.withMode(CreateMode.EPHEMERAL)
				.forPath("/"+service+"/"+version+"/"+address);
		} catch (UnsupportedEncodingException e) {
			logger.error("register service address to zookeeper exception:{}",e);
			throw new ThriftException("register service address to zookeeper exception: address UnsupportedEncodingException", e);
		} catch (Exception e) {
			logger.error("register service address to zookeeper exception:{}",e);
			throw new ThriftException("register service address to zookeeper exception:{}", e);
		}
	}

	public void close(){
		zkClient.close();
	}
}

3.客户端发现服务

定义获取服务地址接口

ThriftServerAddressProvider.java

1. package cn.slimsmart.thrift.rpc.zookeeper;
2. import java.net.InetSocketAddress;
3. import java.util.List;
4. /**
5. * thrift server-service地址提供者,以便构建客户端连接池
6. */
7. public interface ThriftServerAddressProvider {
8. //获取服务名称
9. String getService();
10. /**
11. * 获取所有服务端地址
12. * @return
13. */
14. List<InetSocketAddress> findServerAddressList();
15. /**
16. * 选取一个合适的address,可以随机获取等'
17. * 内部可以使用合适的算法.
18. * @return
19. */
20. InetSocketAddress selector();
21. void close();
22. }

package cn.slimsmart.thrift.rpc.zookeeper;

import java.net.InetSocketAddress;
import java.util.List;

/**
 * thrift server-service地址提供者,以便构建客户端连接池
 */
public interface ThriftServerAddressProvider {

	//获取服务名称
	String getService();

	/**
	 * 获取所有服务端地址
	 * @return
	 */
    List<InetSocketAddress> findServerAddressList();

    /**
     * 选取一个合适的address,可以随机获取等'
     * 内部可以使用合适的算法.
     * @return
     */
    InetSocketAddress selector();

    void close();
}

基于zookeeper服务地址自动发现实现：ThriftServerAddressProviderZookeeper.java

1. package cn.slimsmart.thrift.rpc.zookeeper;
2. import java.net.InetSocketAddress;
3. import java.util.ArrayList;
4. import java.util.Collections;
5. import java.util.HashSet;
6. import java.util.LinkedList;
7. import java.util.List;
8. import java.util.Queue;
9. import java.util.Set;
10. import org.apache.curator.framework.CuratorFramework;
11. import org.apache.curator.framework.imps.CuratorFrameworkState;
12. import org.apache.curator.framework.recipes.cache.ChildData;
13. import org.apache.curator.framework.recipes.cache.PathChildrenCache;
14. import org.apache.curator.framework.recipes.cache.PathChildrenCache.StartMode;
15. import org.apache.curator.framework.recipes.cache.PathChildrenCacheEvent;
16. import org.apache.curator.framework.recipes.cache.PathChildrenCacheListener;
17. import org.slf4j.Logger;
18. import org.slf4j.LoggerFactory;
19. import org.springframework.beans.factory.InitializingBean;
20. /**
21. * 使用zookeeper作为"config"中心,使用apache-curator方法库来简化zookeeper开发
22. */
23. public class ThriftServerAddressProviderZookeeper implements ThriftServerAddressProvider, InitializingBean {
24. private Logger logger = LoggerFactory.getLogger(getClass());
25. // 注册服务
26. private String service;
27. // 服务版本号
28. private String version = "1.0.0";
29. private PathChildrenCache cachedPath;
30. private CuratorFramework zkClient;
31. // 用来保存当前provider所接触过的地址记录
32. // 当zookeeper集群故障时,可以使用trace中地址,作为"备份"
33. private Set<String> trace = new HashSet<String>();
34. private final List<InetSocketAddress> container = new ArrayList<InetSocketAddress>();
35. private Queue<InetSocketAddress> inner = new LinkedList<InetSocketAddress>();
36. private Object lock = new Object();
37. // 默认权重
38. private static final Integer DEFAULT_WEIGHT = 1;
39. public void setService(String service) {
40. this.service = service;
41. }
42. public void setVersion(String version) {
43. this.version = version;
44. }
45. public ThriftServerAddressProviderZookeeper() {
46. }
47. public ThriftServerAddressProviderZookeeper(CuratorFramework zkClient) {
48. this.zkClient = zkClient;
49. }
50. public void setZkClient(CuratorFramework zkClient) {
51. this.zkClient = zkClient;
52. }
53. @Override
54. public void afterPropertiesSet() throws Exception {
55. // 如果zk尚未启动,则启动
56. if (zkClient.getState() == CuratorFrameworkState.LATENT) {
57. zkClient.start();
58. }
59. buildPathChildrenCache(zkClient, getServicePath(), true);
60. cachedPath.start(StartMode.POST_INITIALIZED_EVENT);
61. }
62. private String getServicePath(){
63. return "/" + service + "/" + version;
64. }
65. private void buildPathChildrenCache(final CuratorFramework client, String path, Boolean cacheData) throws Exception {
66. cachedPath = new PathChildrenCache(client, path, cacheData);
67. cachedPath.getListenable().addListener(new PathChildrenCacheListener() {
68. @Override
69. public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
70. PathChildrenCacheEvent.Type eventType = event.getType();
71. switch (eventType) {
72. case CONNECTION_RECONNECTED:
73. logger.info("Connection is reconection.");
74. break;
75. case CONNECTION_SUSPENDED:
76. logger.info("Connection is suspended.");
77. break;
78. case CONNECTION_LOST:
79. logger.warn("Connection error,waiting...");
80. return;
81. default:
82. //
83. }
84. // 任何节点的时机数据变动,都会rebuild,此处为一个"简单的"做法.
85. cachedPath.rebuild();
86. rebuild();
87. }
88. protected void rebuild() throws Exception {
89. List<ChildData> children = cachedPath.getCurrentData();
90. if (children == null || children.isEmpty()) {
91. // 有可能所有的thrift server都与zookeeper断开了链接
92. // 但是,有可能,thrift client与thrift server之间的网络是良好的
93. // 因此此处是否需要清空container,是需要多方面考虑的.
94. container.clear();
95. logger.error("thrift server-cluster error....");
96. return;
97. }
98. List<InetSocketAddress> current = new ArrayList<InetSocketAddress>();
99. String path = null;
100. for (ChildData data : children) {
101. path = data.getPath();
102. logger.debug("get path:"+path);
103. path = path.substring(getServicePath().length()+1);
104. logger.debug("get serviceAddress:"+path);
105. String address = new String(path.getBytes(), "utf-8");
106. current.addAll(transfer(address));
107. trace.add(address);
108. }
109. Collections.shuffle(current);
110. synchronized (lock) {
111. container.clear();
112. container.addAll(current);
113. inner.clear();
114. inner.addAll(current);
115. }
116. }
117. });
118. }
119. private List<InetSocketAddress> transfer(String address) {
120. String[] hostname = address.split(":");
121. Integer weight = DEFAULT_WEIGHT;
122. if (hostname.length == 3) {
123. weight = Integer.valueOf(hostname[2]);
124. }
125. String ip = hostname[0];
126. Integer port = Integer.valueOf(hostname[1]);
127. List<InetSocketAddress> result = new ArrayList<InetSocketAddress>();
128. // 根据优先级，将ip：port添加多次到地址集中，然后随机取地址实现负载
129. for (int i = 0; i < weight; i++) {
130. result.add(new InetSocketAddress(ip, port));
131. }
132. return result;
133. }
134. @Override
135. public List<InetSocketAddress> findServerAddressList() {
136. return Collections.unmodifiableList(container);
137. }
138. @Override
139. public synchronized InetSocketAddress selector() {
140. if (inner.isEmpty()) {
141. if (!container.isEmpty()) {
142. inner.addAll(container);
143. } else if (!trace.isEmpty()) {
144. synchronized (lock) {
145. for (String hostname : trace) {
146. container.addAll(transfer(hostname));
147. }
148. Collections.shuffle(container);
149. inner.addAll(container);
150. }
151. }
152. }
153. return inner.poll();
154. }
155. @Override
156. public void close() {
157. try {
158. cachedPath.close();
159. zkClient.close();
160. } catch (Exception e) {
161. }
162. }
163. @Override
164. public String getService() {
165. return service;
166. }
167. }

package cn.slimsmart.thrift.rpc.zookeeper;

import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;
import java.util.Set;

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.imps.CuratorFrameworkState;
import org.apache.curator.framework.recipes.cache.ChildData;
import org.apache.curator.framework.recipes.cache.PathChildrenCache;
import org.apache.curator.framework.recipes.cache.PathChildrenCache.StartMode;
import org.apache.curator.framework.recipes.cache.PathChildrenCacheEvent;
import org.apache.curator.framework.recipes.cache.PathChildrenCacheListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.InitializingBean;

/**
 * 使用zookeeper作为"config"中心,使用apache-curator方法库来简化zookeeper开发
 */
public class ThriftServerAddressProviderZookeeper implements ThriftServerAddressProvider, InitializingBean {

	private Logger logger = LoggerFactory.getLogger(getClass());

	// 注册服务
	private String service;
	// 服务版本号
	private String version = "1.0.0";

	private PathChildrenCache cachedPath;

	private CuratorFramework zkClient;

	// 用来保存当前provider所接触过的地址记录
	// 当zookeeper集群故障时,可以使用trace中地址,作为"备份"
	private Set<String> trace = new HashSet<String>();

	private final List<InetSocketAddress> container = new ArrayList<InetSocketAddress>();

	private Queue<InetSocketAddress> inner = new LinkedList<InetSocketAddress>();

	private Object lock = new Object();

	// 默认权重
	private static final Integer DEFAULT_WEIGHT = 1;

	public void setService(String service) {
		this.service = service;
	}

	public void setVersion(String version) {
		this.version = version;
	}

	public ThriftServerAddressProviderZookeeper() {
	}

	public ThriftServerAddressProviderZookeeper(CuratorFramework zkClient) {
		this.zkClient = zkClient;
	}

	public void setZkClient(CuratorFramework zkClient) {
		this.zkClient = zkClient;
	}

	@Override
	public void afterPropertiesSet() throws Exception {
		// 如果zk尚未启动,则启动
		if (zkClient.getState() == CuratorFrameworkState.LATENT) {
			zkClient.start();
		}
		buildPathChildrenCache(zkClient, getServicePath(), true);
		cachedPath.start(StartMode.POST_INITIALIZED_EVENT);
	}

	private String getServicePath(){
		return "/" + service + "/" + version;
	}
	private void buildPathChildrenCache(final CuratorFramework client, String path, Boolean cacheData) throws Exception {
		cachedPath = new PathChildrenCache(client, path, cacheData);
		cachedPath.getListenable().addListener(new PathChildrenCacheListener() {
			@Override
			public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
				PathChildrenCacheEvent.Type eventType = event.getType();
				switch (eventType) {
				case CONNECTION_RECONNECTED:
					logger.info("Connection is reconection.");
					break;
				case CONNECTION_SUSPENDED:
					logger.info("Connection is suspended.");
					break;
				case CONNECTION_LOST:
					logger.warn("Connection error,waiting...");
					return;
				default:
					//
				}
				// 任何节点的时机数据变动,都会rebuild,此处为一个"简单的"做法.
				cachedPath.rebuild();
				rebuild();
			}

			protected void rebuild() throws Exception {
				List<ChildData> children = cachedPath.getCurrentData();
				if (children == null || children.isEmpty()) {
					// 有可能所有的thrift server都与zookeeper断开了链接
					// 但是,有可能,thrift client与thrift server之间的网络是良好的
					// 因此此处是否需要清空container,是需要多方面考虑的.
					container.clear();
					logger.error("thrift server-cluster error....");
					return;
				}
				List<InetSocketAddress> current = new ArrayList<InetSocketAddress>();
				String path = null;
				for (ChildData data : children) {
					path = data.getPath();
					logger.debug("get path:"+path);
					path = path.substring(getServicePath().length()+1);
					logger.debug("get serviceAddress:"+path);
					String address = new String(path.getBytes(), "utf-8");
					current.addAll(transfer(address));
					trace.add(address);
				}
				Collections.shuffle(current);
				synchronized (lock) {
					container.clear();
					container.addAll(current);
					inner.clear();
					inner.addAll(current);

				}
			}
		});
	}

	private List<InetSocketAddress> transfer(String address) {
		String[] hostname = address.split(":");
		Integer weight = DEFAULT_WEIGHT;
		if (hostname.length == 3) {
			weight = Integer.valueOf(hostname[2]);
		}
		String ip = hostname[0];
		Integer port = Integer.valueOf(hostname[1]);
		List<InetSocketAddress> result = new ArrayList<InetSocketAddress>();
		// 根据优先级，将ip：port添加多次到地址集中，然后随机取地址实现负载
		for (int i = 0; i < weight; i++) {
			result.add(new InetSocketAddress(ip, port));
		}
		return result;
	}

	@Override
	public List<InetSocketAddress> findServerAddressList() {
		return Collections.unmodifiableList(container);
	}

	@Override
	public synchronized InetSocketAddress selector() {
		if (inner.isEmpty()) {
			if (!container.isEmpty()) {
				inner.addAll(container);
			} else if (!trace.isEmpty()) {
				synchronized (lock) {
					for (String hostname : trace) {
						container.addAll(transfer(hostname));
					}
					Collections.shuffle(container);
					inner.addAll(container);
				}
			}
		}
		return inner.poll();
	}

	@Override
	public void close() {
		try {
            cachedPath.close();
            zkClient.close();
        } catch (Exception e) {
        }
	}

	@Override
	public String getService() {
		return service;
	}

}

对此接口还做了一种实现，通过配置获取服务地址，参考附件：FixedAddressProvider.java

三、服务端服务注册实现

ThriftServiceServerFactory.java

1. package cn.slimsmart.thrift.rpc;
2. import java.lang.instrument.IllegalClassFormatException;
3. import java.lang.reflect.Constructor;
4. import org.apache.thrift.TProcessor;
5. import org.apache.thrift.TProcessorFactory;
6. import org.apache.thrift.protocol.TBinaryProtocol;
7. import org.apache.thrift.server.TServer;
8. import org.apache.thrift.server.TThreadedSelectorServer;
9. import org.apache.thrift.transport.TFramedTransport;
10. import org.apache.thrift.transport.TNonblockingServerSocket;
11. import org.springframework.beans.factory.InitializingBean;
12. import org.springframework.util.StringUtils;
13. import cn.slimsmart.thrift.rpc.zookeeper.ThriftServerAddressRegister;
14. import cn.slimsmart.thrift.rpc.zookeeper.ThriftServerIpLocalNetworkResolve;
15. import cn.slimsmart.thrift.rpc.zookeeper.ThriftServerIpResolve;
16. /**
17. * 服务端注册服务工厂
18. */
19. public class ThriftServiceServerFactory implements InitializingBean {
20. // 服务注册本机端口
21. private Integer port = 8299;
22. // 优先级
23. private Integer weight = 1;// default
24. // 服务实现类
25. private Object service;// serice实现类
26. //服务版本号
27. private String version;
28. // 解析本机IP
29. private ThriftServerIpResolve thriftServerIpResolve;
30. //服务注册
31. private ThriftServerAddressRegister thriftServerAddressRegister;
32. private ServerThread serverThread;
33. public void setPort(Integer port) {
34. this.port = port;
35. }
36. public void setWeight(Integer weight) {
37. this.weight = weight;
38. }
39. public void setService(Object service) {
40. this.service = service;
41. }
42. public void setVersion(String version) {
43. this.version = version;
44. }
45. public void setThriftServerIpResolve(ThriftServerIpResolve thriftServerIpResolve) {
46. this.thriftServerIpResolve = thriftServerIpResolve;
47. }
48. public void setThriftServerAddressRegister(ThriftServerAddressRegister thriftServerAddressRegister) {
49. this.thriftServerAddressRegister = thriftServerAddressRegister;
50. }
51. @Override
52. public void afterPropertiesSet() throws Exception {
53. if (thriftServerIpResolve == null) {
54. thriftServerIpResolve = new ThriftServerIpLocalNetworkResolve();
55. }
56. String serverIP = thriftServerIpResolve.getServerIp();
57. if (StringUtils.isEmpty(serverIP)) {
58. throw new ThriftException("cant find server ip...");
59. }
60. String hostname = serverIP + ":" + port + ":" + weight;
61. Class<?> serviceClass = service.getClass();
62. // 获取实现类接口
63. Class<?>[] interfaces = serviceClass.getInterfaces();
64. if (interfaces.length == 0) {
65. throw new IllegalClassFormatException("service-class should implements Iface");
66. }
67. // reflect,load "Processor";
68. TProcessor processor = null;
69. String serviceName = null;
70. for (Class<?> clazz : interfaces) {
71. String cname = clazz.getSimpleName();
72. if (!cname.equals("Iface")) {
73. continue;
74. }
75. serviceName = clazz.getEnclosingClass().getName();
76. String pname = serviceName + "$Processor";
77. try {
78. ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
79. Class<?> pclass = classLoader.loadClass(pname);
80. if (!TProcessor.class.isAssignableFrom(pclass)) {
81. continue;
82. }
83. Constructor<?> constructor = pclass.getConstructor(clazz);
84. processor = (TProcessor) constructor.newInstance(service);
85. break;
86. } catch (Exception e) {
87. //
88. }
89. }
90. if (processor == null) {
91. throw new IllegalClassFormatException("service-class should implements Iface");
92. }
93. //需要单独的线程,因为serve方法是阻塞的.
94. serverThread = new ServerThread(processor, port);
95. serverThread.start();
96. // 注册服务
97. if (thriftServerAddressRegister != null) {
98. thriftServerAddressRegister.register(serviceName, version, hostname);
99. }
100. }
101. class ServerThread extends Thread {
102. private TServer server;
103. ServerThread(TProcessor processor, int port) throws Exception {
104. TNonblockingServerSocket serverTransport = new TNonblockingServerSocket(port);
105. TThreadedSelectorServer.Args tArgs = new TThreadedSelectorServer.Args(serverTransport);
106. TProcessorFactory processorFactory = new TProcessorFactory(processor);
107. tArgs.processorFactory(processorFactory);
108. tArgs.transportFactory(new TFramedTransport.Factory());
109. tArgs.protocolFactory( new TBinaryProtocol.Factory(true, true));
110. server = new TThreadedSelectorServer(tArgs);
111. }
112. @Override
113. public void run(){
114. try{
115. //启动服务
116. server.serve();
117. }catch(Exception e){
118. //
119. }
120. }
121. public void stopServer(){
122. server.stop();
123. }
124. }
125. public void close() {
126. serverThread.stopServer();
127. }
128. }

package cn.slimsmart.thrift.rpc;

import java.lang.instrument.IllegalClassFormatException;
import java.lang.reflect.Constructor;

import org.apache.thrift.TProcessor;
import org.apache.thrift.TProcessorFactory;
import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.server.TServer;
import org.apache.thrift.server.TThreadedSelectorServer;
import org.apache.thrift.transport.TFramedTransport;
import org.apache.thrift.transport.TNonblockingServerSocket;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.util.StringUtils;

import cn.slimsmart.thrift.rpc.zookeeper.ThriftServerAddressRegister;
import cn.slimsmart.thrift.rpc.zookeeper.ThriftServerIpLocalNetworkResolve;
import cn.slimsmart.thrift.rpc.zookeeper.ThriftServerIpResolve;

/**
 * 服务端注册服务工厂
 */
public class ThriftServiceServerFactory implements InitializingBean {
	// 服务注册本机端口
	private Integer port = 8299;
	// 优先级
	private Integer weight = 1;// default
	// 服务实现类
	private Object service;// serice实现类
	//服务版本号
	private String version;
	// 解析本机IP
	private ThriftServerIpResolve thriftServerIpResolve;
	//服务注册
	private ThriftServerAddressRegister thriftServerAddressRegister;

	private ServerThread serverThread;

	public void setPort(Integer port) {
		this.port = port;
	}

	public void setWeight(Integer weight) {
		this.weight = weight;
	}

	public void setService(Object service) {
		this.service = service;
	}

	public void setVersion(String version) {
		this.version = version;
	}

	public void setThriftServerIpResolve(ThriftServerIpResolve thriftServerIpResolve) {
		this.thriftServerIpResolve = thriftServerIpResolve;
	}

	public void setThriftServerAddressRegister(ThriftServerAddressRegister thriftServerAddressRegister) {
		this.thriftServerAddressRegister = thriftServerAddressRegister;
	}

	@Override
	public void afterPropertiesSet() throws Exception {
		if (thriftServerIpResolve == null) {
			thriftServerIpResolve = new ThriftServerIpLocalNetworkResolve();
		}
		String serverIP = thriftServerIpResolve.getServerIp();
		if (StringUtils.isEmpty(serverIP)) {
			throw new ThriftException("cant find server ip...");
		}

		String hostname = serverIP + ":" + port + ":" + weight;
		Class<?> serviceClass = service.getClass();
		// 获取实现类接口
		Class<?>[] interfaces = serviceClass.getInterfaces();
		if (interfaces.length == 0) {
			throw new IllegalClassFormatException("service-class should implements Iface");
		}
		// reflect,load "Processor";
		TProcessor processor = null;
		String serviceName = null;
		for (Class<?> clazz : interfaces) {
			String cname = clazz.getSimpleName();
			if (!cname.equals("Iface")) {
				continue;
			}
			serviceName = clazz.getEnclosingClass().getName();
			String pname = serviceName + "$Processor";
			try {
				ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
				Class<?> pclass = classLoader.loadClass(pname);
				if (!TProcessor.class.isAssignableFrom(pclass)) {
					continue;
				}
				Constructor<?> constructor = pclass.getConstructor(clazz);
				processor = (TProcessor) constructor.newInstance(service);
				break;
			} catch (Exception e) {
				//
			}
		}
		if (processor == null) {
			throw new IllegalClassFormatException("service-class should implements Iface");
		}
		//需要单独的线程,因为serve方法是阻塞的.
		serverThread = new ServerThread(processor, port);
		serverThread.start();
		// 注册服务
		if (thriftServerAddressRegister != null) {
			thriftServerAddressRegister.register(serviceName, version, hostname);
		}

	}
	class ServerThread extends Thread {
		private TServer server;
		ServerThread(TProcessor processor, int port) throws Exception {
			TNonblockingServerSocket serverTransport = new TNonblockingServerSocket(port);
			TThreadedSelectorServer.Args tArgs = new TThreadedSelectorServer.Args(serverTransport);
			TProcessorFactory processorFactory = new TProcessorFactory(processor);
			tArgs.processorFactory(processorFactory);
			tArgs.transportFactory(new TFramedTransport.Factory());
			tArgs.protocolFactory( new TBinaryProtocol.Factory(true, true));
			server = new TThreadedSelectorServer(tArgs);
		}

		@Override
		public void run(){
			try{
				//启动服务
				server.serve();
			}catch(Exception e){
				//
			}
		}

		public void stopServer(){
			server.stop();
		}
	}

	public void close() {
		serverThread.stopServer();
	}
}

四、客户端获取服务代理及连接池实现
客户端连接池实现：ThriftClientPoolFactory.java

1. package cn.slimsmart.thrift.rpc;
2. import java.net.InetSocketAddress;
3. import org.apache.commons.pool.BasePoolableObjectFactory;
4. import org.apache.thrift.TServiceClient;
5. import org.apache.thrift.TServiceClientFactory;
6. import org.apache.thrift.protocol.TBinaryProtocol;
7. import org.apache.thrift.protocol.TProtocol;
8. import org.apache.thrift.transport.TFramedTransport;
9. import org.apache.thrift.transport.TSocket;
10. import org.apache.thrift.transport.TTransport;
11. import cn.slimsmart.thrift.rpc.zookeeper.ThriftServerAddressProvider;
12. /**
13. * 连接池,thrift-client for spring
14. */
15. public class ThriftClientPoolFactory extends BasePoolableObjectFactory<TServiceClient> {
16. private final ThriftServerAddressProvider serverAddressProvider;
17. private final TServiceClientFactory<TServiceClient> clientFactory;
18. private PoolOperationCallBack callback;
19. protected ThriftClientPoolFactory(ThriftServerAddressProvider addressProvider, TServiceClientFactory<TServiceClient> clientFactory) throws Exception {
20. this.serverAddressProvider = addressProvider;
21. this.clientFactory = clientFactory;
22. }
23. protected ThriftClientPoolFactory(ThriftServerAddressProvider addressProvider, TServiceClientFactory<TServiceClient> clientFactory,
24. PoolOperationCallBack callback) throws Exception {
25. this.serverAddressProvider = addressProvider;
26. this.clientFactory = clientFactory;
27. this.callback = callback;
28. }
29. static interface PoolOperationCallBack {
30. // 销毁client之前执行
31. void destroy(TServiceClient client);
32. // 创建成功是执行
33. void make(TServiceClient client);
34. }
35. public void destroyObject(TServiceClient client) throws Exception {
36. if (callback != null) {
37. try {
38. callback.destroy(client);
39. } catch (Exception e) {
40. //
41. }
42. }
43. TTransport pin = client.getInputProtocol().getTransport();
44. pin.close();
45. }
46. public boolean validateObject(TServiceClient client) {
47. TTransport pin = client.getInputProtocol().getTransport();
48. return pin.isOpen();
49. }
50. @Override
51. public TServiceClient makeObject() throws Exception {
52. InetSocketAddress address = serverAddressProvider.selector();
53. TSocket tsocket = new TSocket(address.getHostName(), address.getPort());
54. TTransport transport = new TFramedTransport(tsocket);
55. TProtocol protocol = new TBinaryProtocol(transport);
56. TServiceClient client = this.clientFactory.getClient(protocol);
57. transport.open();
58. if (callback != null) {
59. try {
60. callback.make(client);
61. } catch (Exception e) {
62. //
63. }
64. }
65. return client;
66. }
67. }

package cn.slimsmart.thrift.rpc;

import java.net.InetSocketAddress;

import org.apache.commons.pool.BasePoolableObjectFactory;
import org.apache.thrift.TServiceClient;
import org.apache.thrift.TServiceClientFactory;
import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TFramedTransport;
import org.apache.thrift.transport.TSocket;
import org.apache.thrift.transport.TTransport;

import cn.slimsmart.thrift.rpc.zookeeper.ThriftServerAddressProvider;

/**
 * 连接池,thrift-client for spring
 */
public class ThriftClientPoolFactory extends BasePoolableObjectFactory<TServiceClient> {

	private final ThriftServerAddressProvider serverAddressProvider;
	private final TServiceClientFactory<TServiceClient> clientFactory;
	private PoolOperationCallBack callback;

	protected ThriftClientPoolFactory(ThriftServerAddressProvider addressProvider, TServiceClientFactory<TServiceClient> clientFactory) throws Exception {
		this.serverAddressProvider = addressProvider;
		this.clientFactory = clientFactory;
	}

	protected ThriftClientPoolFactory(ThriftServerAddressProvider addressProvider, TServiceClientFactory<TServiceClient> clientFactory,
			PoolOperationCallBack callback) throws Exception {
		this.serverAddressProvider = addressProvider;
		this.clientFactory = clientFactory;
		this.callback = callback;
	}

	static interface PoolOperationCallBack {
		// 销毁client之前执行
		void destroy(TServiceClient client);

		// 创建成功是执行
		void make(TServiceClient client);
	}

	public void destroyObject(TServiceClient client) throws Exception {
		if (callback != null) {
			try {
				callback.destroy(client);
			} catch (Exception e) {
				//
			}
		}
		TTransport pin = client.getInputProtocol().getTransport();
		pin.close();
	}

	public boolean validateObject(TServiceClient client) {
		TTransport pin = client.getInputProtocol().getTransport();
		return pin.isOpen();
	}

	@Override
	public TServiceClient makeObject() throws Exception {
		InetSocketAddress address = serverAddressProvider.selector();
		TSocket tsocket = new TSocket(address.getHostName(), address.getPort());
		TTransport transport = new TFramedTransport(tsocket);
		TProtocol protocol = new TBinaryProtocol(transport);
		TServiceClient client = this.clientFactory.getClient(protocol);
		transport.open();
		if (callback != null) {
			try {
				callback.make(client);
			} catch (Exception e) {
				//
			}
		}
		return client;
	}

}

客户端服务代理工厂实现：ThriftServiceClientProxyFactory.java

1. package cn.slimsmart.thrift.rpc;
2. import java.lang.reflect.InvocationHandler;
3. import java.lang.reflect.Method;
4. import java.lang.reflect.Proxy;
5. import org.apache.commons.pool.impl.GenericObjectPool;
6. import org.apache.thrift.TServiceClient;
7. import org.apache.thrift.TServiceClientFactory;
8. import org.springframework.beans.factory.FactoryBean;
9. import org.springframework.beans.factory.InitializingBean;
10. import cn.slimsmart.thrift.rpc.ThriftClientPoolFactory.PoolOperationCallBack;
11. import cn.slimsmart.thrift.rpc.zookeeper.ThriftServerAddressProvider;
12. /**
13. * 客户端代理
14. */
15. @SuppressWarnings({ "unchecked", "rawtypes" })
16. public class ThriftServiceClientProxyFactory implements FactoryBean, InitializingBean {
17. private Integer maxActive = 32;// 最大活跃连接数
18. // ms,default 3 min,链接空闲时间
19. // -1,关闭空闲检测
20. private Integer idleTime = 180000;
21. private ThriftServerAddressProvider serverAddressProvider;
22. private Object proxyClient;
23. private Class<?> objectClass;
24. private GenericObjectPool<TServiceClient> pool;
25. private PoolOperationCallBack callback = new PoolOperationCallBack() {
26. @Override
27. public void make(TServiceClient client) {
28. System.out.println("create");
29. }
30. @Override
31. public void destroy(TServiceClient client) {
32. System.out.println("destroy");
33. }
34. };
35. public void setMaxActive(Integer maxActive) {
36. this.maxActive = maxActive;
37. }
38. public void setIdleTime(Integer idleTime) {
39. this.idleTime = idleTime;
40. }
41. public void setServerAddressProvider(ThriftServerAddressProvider serverAddressProvider) {
42. this.serverAddressProvider = serverAddressProvider;
43. }
44. @Override
45. public void afterPropertiesSet() throws Exception {
46. ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
47. // 加载Iface接口
48. objectClass = classLoader.loadClass(serverAddressProvider.getService() + "$Iface");
49. // 加载Client.Factory类
50. Class<TServiceClientFactory<TServiceClient>> fi = (Class<TServiceClientFactory<TServiceClient>>) classLoader.loadClass(serverAddressProvider.getService() + "$Client$Factory");
51. TServiceClientFactory<TServiceClient> clientFactory = fi.newInstance();
52. ThriftClientPoolFactory clientPool = new ThriftClientPoolFactory(serverAddressProvider, clientFactory, callback);
53. GenericObjectPool.Config poolConfig = new GenericObjectPool.Config();
54. poolConfig.maxActive = maxActive;
55. poolConfig.minIdle = 0;
56. poolConfig.minEvictableIdleTimeMillis = idleTime;
57. poolConfig.timeBetweenEvictionRunsMillis = idleTime / 2L;
58. pool = new GenericObjectPool<TServiceClient>(clientPool, poolConfig);
59. proxyClient = Proxy.newProxyInstance(classLoader, new Class[] { objectClass }, new InvocationHandler() {
60. @Override
61. public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
62. //
63. TServiceClient client = pool.borrowObject();
64. try {
65. return method.invoke(client, args);
66. } catch (Exception e) {
67. throw e;
68. } finally {
69. pool.returnObject(client);
70. }
71. }
72. });
73. }
74. @Override
75. public Object getObject() throws Exception {
76. return proxyClient;
77. }
78. @Override
79. public Class<?> getObjectType() {
80. return objectClass;
81. }
82. @Override
83. public boolean isSingleton() {
84. return true;
85. }
86. public void close() {
87. if (serverAddressProvider != null) {
88. serverAddressProvider.close();
89. }
90. }
91. }

package cn.slimsmart.thrift.rpc;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

import org.apache.commons.pool.impl.GenericObjectPool;
import org.apache.thrift.TServiceClient;
import org.apache.thrift.TServiceClientFactory;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;

import cn.slimsmart.thrift.rpc.ThriftClientPoolFactory.PoolOperationCallBack;
import cn.slimsmart.thrift.rpc.zookeeper.ThriftServerAddressProvider;

/**
 * 客户端代理
 */
@SuppressWarnings({ "unchecked", "rawtypes" })
public class ThriftServiceClientProxyFactory implements FactoryBean, InitializingBean {

	private Integer maxActive = 32;// 最大活跃连接数

	// ms,default 3 min,链接空闲时间
	// -1,关闭空闲检测
	private Integer idleTime = 180000;
	private ThriftServerAddressProvider serverAddressProvider;

	private Object proxyClient;
	private Class<?> objectClass;

	private GenericObjectPool<TServiceClient> pool;

	private PoolOperationCallBack callback = new PoolOperationCallBack() {
		@Override
		public void make(TServiceClient client) {
			System.out.println("create");
		}

		@Override
		public void destroy(TServiceClient client) {
			System.out.println("destroy");
		}
	};

	public void setMaxActive(Integer maxActive) {
		this.maxActive = maxActive;
	}

	public void setIdleTime(Integer idleTime) {
		this.idleTime = idleTime;
	}

	public void setServerAddressProvider(ThriftServerAddressProvider serverAddressProvider) {
		this.serverAddressProvider = serverAddressProvider;
	}

	@Override
	public void afterPropertiesSet() throws Exception {
		ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
		// 加载Iface接口
		objectClass = classLoader.loadClass(serverAddressProvider.getService() + "$Iface");
		// 加载Client.Factory类
		Class<TServiceClientFactory<TServiceClient>> fi = (Class<TServiceClientFactory<TServiceClient>>) classLoader.loadClass(serverAddressProvider.getService() + "$Client$Factory");
		TServiceClientFactory<TServiceClient> clientFactory = fi.newInstance();
		ThriftClientPoolFactory clientPool = new ThriftClientPoolFactory(serverAddressProvider, clientFactory, callback);
		GenericObjectPool.Config poolConfig = new GenericObjectPool.Config();
		poolConfig.maxActive = maxActive;
		poolConfig.minIdle = 0;
		poolConfig.minEvictableIdleTimeMillis = idleTime;
		poolConfig.timeBetweenEvictionRunsMillis = idleTime / 2L;
		pool = new GenericObjectPool<TServiceClient>(clientPool, poolConfig);
		proxyClient = Proxy.newProxyInstance(classLoader, new Class[] { objectClass }, new InvocationHandler() {
			@Override
			public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
				//
				TServiceClient client = pool.borrowObject();
				try {
					return method.invoke(client, args);
				} catch (Exception e) {
					throw e;
				} finally {
					pool.returnObject(client);
				}
			}
		});
	}

	@Override
	public Object getObject() throws Exception {
		return proxyClient;
	}

	@Override
	public Class<?> getObjectType() {
		return objectClass;
	}

	@Override
	public boolean isSingleton() {
		return true;
	}

	public void close() {
		if (serverAddressProvider != null) {
			serverAddressProvider.close();
		}
	}
}

下面我们看一下服务端和客户端的配置;

服务端spring-context-thrift-server.xml

1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
4. xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
5. xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
6. http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
7. http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
8. http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"
9. default-lazy-init="false">
10. <!-- zookeeper -->
11. <bean id="thriftZookeeper" class="cn.slimsmart.thrift.rpc.zookeeper.ZookeeperFactory"
12. destroy-method="close">
13. <property name="zkHosts"
14. value="192.168.36.54:2181,192.168.36.99:2181,192.168.36.189:2181" />
15. <property name="namespace" value="cn.slimsmart.thrift.rpc.demo" />
16. <property name="connectionTimeout" value="3000" />
17. <property name="sessionTimeout" value="3000" />
18. <property name="singleton" value="true" />
19. </bean>
20. <bean id="sericeAddressRegister"
21. class="cn.slimsmart.thrift.rpc.zookeeper.ThriftServerAddressRegisterZookeeper"
22. destroy-method="close">
23. <property name="zkClient" ref="thriftZookeeper" />
24. </bean>
25. <bean id="echoSerivceImpl" class="cn.slimsmart.thrift.rpc.demo.EchoSerivceImpl" />
26. <bean id="echoSerivce" class="cn.slimsmart.thrift.rpc.ThriftServiceServerFactory"
27. destroy-method="close">
28. <property name="service" ref="echoSerivceImpl" />
29. <property name="port" value="9000" />
30. <property name="version" value="1.0.0" />
31. <property name="weight" value="1" />
32. <property name="thriftServerAddressRegister" ref="sericeAddressRegister" />
33. </bean>
34. <bean id="echoSerivce1" class="cn.slimsmart.thrift.rpc.ThriftServiceServerFactory"
35. destroy-method="close">
36. <property name="service" ref="echoSerivceImpl" />
37. <property name="port" value="9001" />
38. <property name="version" value="1.0.0" />
39. <property name="weight" value="1" />
40. <property name="thriftServerAddressRegister" ref="sericeAddressRegister" />
41. </bean>
42. <bean id="echoSerivce2" class="cn.slimsmart.thrift.rpc.ThriftServiceServerFactory"
43. destroy-method="close">
44. <property name="service" ref="echoSerivceImpl" />
45. <property name="port" value="9002" />
46. <property name="version" value="1.0.0" />
47. <property name="weight" value="1" />
48. <property name="thriftServerAddressRegister" ref="sericeAddressRegister" />
49. </bean>
50. </beans>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
				http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
				http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
				http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"
	default-lazy-init="false">

	<!-- zookeeper -->
	<bean id="thriftZookeeper" class="cn.slimsmart.thrift.rpc.zookeeper.ZookeeperFactory"
		destroy-method="close">
		<property name="zkHosts"
			value="192.168.36.54:2181,192.168.36.99:2181,192.168.36.189:2181" />
		<property name="namespace" value="cn.slimsmart.thrift.rpc.demo" />
		<property name="connectionTimeout" value="3000" />
		<property name="sessionTimeout" value="3000" />
		<property name="singleton" value="true" />
	</bean>
	<bean id="sericeAddressRegister"
		class="cn.slimsmart.thrift.rpc.zookeeper.ThriftServerAddressRegisterZookeeper"
		destroy-method="close">
		<property name="zkClient" ref="thriftZookeeper" />
	</bean>
	<bean id="echoSerivceImpl" class="cn.slimsmart.thrift.rpc.demo.EchoSerivceImpl" />

	<bean id="echoSerivce" class="cn.slimsmart.thrift.rpc.ThriftServiceServerFactory"
		destroy-method="close">
		<property name="service" ref="echoSerivceImpl" />
		<property name="port" value="9000" />
		<property name="version" value="1.0.0" />
		<property name="weight" value="1" />
		<property name="thriftServerAddressRegister" ref="sericeAddressRegister" />
	</bean>

	<bean id="echoSerivce1" class="cn.slimsmart.thrift.rpc.ThriftServiceServerFactory"
		destroy-method="close">
		<property name="service" ref="echoSerivceImpl" />
		<property name="port" value="9001" />
		<property name="version" value="1.0.0" />
		<property name="weight" value="1" />
		<property name="thriftServerAddressRegister" ref="sericeAddressRegister" />
	</bean>

	<bean id="echoSerivce2" class="cn.slimsmart.thrift.rpc.ThriftServiceServerFactory"
		destroy-method="close">
		<property name="service" ref="echoSerivceImpl" />
		<property name="port" value="9002" />
		<property name="version" value="1.0.0" />
		<property name="weight" value="1" />
		<property name="thriftServerAddressRegister" ref="sericeAddressRegister" />
	</bean>
</beans>

客户端：spring-context-thrift-client.xml

1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
4. xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
5. xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
6. http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
7. http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
8. http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"
9. default-lazy-init="false">
10. <!-- fixedAddress -->
11. <!--
12. <bean id="fixedAddressProvider" class="cn.slimsmart.thrift.rpc.zookeeper.FixedAddressProvider">
13. <property name="service" value="cn.slimsmart.thrift.rpc.demo.EchoSerivce" />
14. <property name="serverAddress" value="192.168.36.215:9001:1,192.168.36.215:9002:2,192.168.36.215:9003:3" />
15. </bean>
16. <bean id="echoSerivce" class="cn.slimsmart.thrift.rpc.ThriftServiceClientProxyFactory">
17. <property name="maxActive" value="5" />
18. <property name="idleTime" value="10000" />
19. <property name="serverAddressProvider" ref="fixedAddressProvider" />
20. </bean>
21. -->
22. <!-- zookeeper   -->
23. <bean id="thriftZookeeper" class="cn.slimsmart.thrift.rpc.zookeeper.ZookeeperFactory"
24. destroy-method="close">
25. <property name="zkHosts"
26. value="192.168.36.54:2181,192.168.36.99:2181,192.168.36.189:2181" />
27. <property name="namespace" value="cn.slimsmart.thrift.rpc.demo" />
28. <property name="connectionTimeout" value="3000" />
29. <property name="sessionTimeout" value="3000" />
30. <property name="singleton" value="true" />
31. </bean>
32. <bean id="echoSerivce" class="cn.slimsmart.thrift.rpc.ThriftServiceClientProxyFactory" destroy-method="close">
33. <property name="maxActive" value="5" />
34. <property name="idleTime" value="1800000" />
35. <property name="serverAddressProvider">
36. <bean class="cn.slimsmart.thrift.rpc.zookeeper.ThriftServerAddressProviderZookeeper">
37. <property name="service" value="cn.slimsmart.thrift.rpc.demo.EchoSerivce" />
38. <property name="version" value="1.0.0" />
39. <property name="zkClient" ref="thriftZookeeper" />
40. </bean>
41. </property>
42. </bean>
43. </beans>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
				http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
				http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
				http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"
	default-lazy-init="false">

	<!-- fixedAddress -->
	<!--
	<bean id="fixedAddressProvider" class="cn.slimsmart.thrift.rpc.zookeeper.FixedAddressProvider">
		 <property name="service" value="cn.slimsmart.thrift.rpc.demo.EchoSerivce" />
         <property name="serverAddress" value="192.168.36.215:9001:1,192.168.36.215:9002:2,192.168.36.215:9003:3" />
	</bean>
    <bean id="echoSerivce" class="cn.slimsmart.thrift.rpc.ThriftServiceClientProxyFactory">
        <property name="maxActive" value="5" />
        <property name="idleTime" value="10000" />
        <property name="serverAddressProvider" ref="fixedAddressProvider" />
    </bean>
   -->
    <!-- zookeeper   -->
    <bean id="thriftZookeeper" class="cn.slimsmart.thrift.rpc.zookeeper.ZookeeperFactory"
		destroy-method="close">
		<property name="zkHosts"
			value="192.168.36.54:2181,192.168.36.99:2181,192.168.36.189:2181" />
		<property name="namespace" value="cn.slimsmart.thrift.rpc.demo" />
		<property name="connectionTimeout" value="3000" />
		<property name="sessionTimeout" value="3000" />
		<property name="singleton" value="true" />
	</bean>
    <bean id="echoSerivce" class="cn.slimsmart.thrift.rpc.ThriftServiceClientProxyFactory" destroy-method="close">
        <property name="maxActive" value="5" />
        <property name="idleTime" value="1800000" />
        <property name="serverAddressProvider">
        	<bean class="cn.slimsmart.thrift.rpc.zookeeper.ThriftServerAddressProviderZookeeper">
        		<property name="service" value="cn.slimsmart.thrift.rpc.demo.EchoSerivce" />
        		<property name="version" value="1.0.0" />
        		<property name="zkClient" ref="thriftZookeeper" />
        	</bean>
        </property>
    </bean>
</beans>

运行服务端后，我们可以看见zookeeper注册了多个服务地址。

详细实例这里就不详述了，请参考实例代码：https://github.com/slimina/thrift-zookeeper-rpc

关于Thrift设计优化文档：

Thrift RPC服务框架日志的优化