[转载] Thrift-client与spring集成

转载自http://shift-alt-ctrl.iteye.com/blog/1990030?utm_source=tuicool&utm_medium=referral

Thrift-client作为服务消费端,由于thrift使用socket通讯,因此它需要面对几个问题:

    1) client端需要知道server端的IP + port,如果是分布式部署,还需要知道所有server的IP + port列表.  

    2) client为了提升性能,不可能只使用一个socket来处理并发请求,当然也不能每个请求都创建一个socket;我们需要使用连接池方案.

    3) 对于java开发工程师而言,基于spring配置thrift服务,可以提供很多的便利.

    4) 基于zookeeper配置管理,那么client端就不需要"硬编码"的配置server的ip + port,可以使用zookeeper来推送每个service的服务地址.

    5) 因为thrift-client端不使用连接池的话，将不能有效的提高并发能力，本文重点描述看如何使用thrift-client连接池。

1. pom.xml

Java代码  

1. <dependencies>  
2.     <dependency>  
3.         <groupId>org.springframework</groupId>  
4.         <artifactId>spring-context</artifactId>  
5.         <version>3.0.7.RELEASE</version>  
6.     </dependency>  
7.     <dependency>  
8.         <groupId>org.apache.zookeeper</groupId>  
9.         <artifactId>zookeeper</artifactId>  
10.         <version>3.4.5</version>  
11.         <!--<exclusions>-->  
12.             <!--<exclusion>-->  
13.                 <!--<groupId>log4j</groupId>-->  
14.                 <!--<artifactId>log4j</artifactId>-->  
15.             <!--</exclusion>-->  
16.         <!--</exclusions>-->  
17.     </dependency>  
18.     <!--  
19.     <dependency>  
20.         <groupId>com.101tec</groupId>  
21.         <artifactId>zkclient</artifactId>  
22.         <version>0.4</version>  
23.     </dependency>  
24.     -->  
25.     <dependency>  
26.         <groupId>org.apache.thrift</groupId>  
27.         <artifactId>libthrift</artifactId>  
28.         <version>0.9.1</version>  
29.     </dependency>  
30.     <dependency>  
31.         <groupId>org.apache.curator</groupId>  
32.         <artifactId>curator-recipes</artifactId>  
33.         <version>2.3.0</version>  
34.     </dependency>  
35.     <dependency>  
36.         <groupId>commons-pool</groupId>  
37.         <artifactId>commons-pool</artifactId>  
38.         <version>1.6</version>  
39.     </dependency>  
40.   
41. </dependencies>  

2. spring-thrift-client.xml

    其中zookeeper作为可选项,开发者也可以通过制定serverAddress的方式指定server的地址.

Java代码  

1. <!-- fixedAddress -->  
2. <!--    
3. <bean id="userService" class="com.demo.thrift.ThriftServiceClientProxyFactory">  
4.     <property name="service" value="com.demo.service.UserService"></property>  
5.     <property name="serverAddress" value="127.0.0.1:9090:2"></property>  
6.     <property name="maxActive" value="5"></property>  
7.     <property name="idleTime" value="10000"></property>  
8. </bean>  
9. -->  
10. <!-- zookeeper -->  
11. <bean id="thriftZookeeper" class="com.demo.thrift.zookeeper.ZookeeperFactory" destroy-method="close">  
12.     <property name="connectString" value="127.0.0.1:2181"></property>  
13.     <property name="namespace" value="demo/thrift-service"></property>  
14. </bean>  
15. <bean id="userService" class="com.demo.thrift.ThriftServiceClientProxyFactory" destroy-method="close">  
16.     <property name="service" value="com.demo.service.UserService"></property>  
17.     <property name="maxActive" value="5"></property>  
18.     <property name="idleTime" value="1800000"></property>  
19.     <property name="addressProvider">  
20.         <bean class="com.demo.thrift.support.impl.DynamicAddressProvider">  
21.             <property name="configPath" value="UserServiceImpl"></property>  
22.             <property name="zookeeper" ref="thriftZookeeper"></property>  
23.         </bean>  
24.     </property>  
25. </bean>  

3. ThriftServiceClientProxyFactory.java

    因为我们要在client端使用连接池方案,那么就需要对client的方法调用过程,进行代理,这个类,就是维护了一个"Client"代理类,并在方法调用时,从"对象池"中取出一个"Client"对象,并在方法实际调用结束后归还给"对象池".  

Java代码  

1. @SuppressWarnings("rawtypes")  
2. public class ThriftServiceClientProxyFactory implements FactoryBean,InitializingBean {  
3.   
4.     private String service;  
5.   
6.     private String serverAddress;  
7.       
8.     private Integer maxActive = 32;//最大活跃连接数  
9.       
10.     ////ms,default 3 min,链接空闲时间  
11.     //-1,关闭空闲检测  
12.     private Integer idleTime = 180000;  
13.     private ThriftServerAddressProvider addressProvider;  
14.   
15.     private Object proxyClient;  
16.       
17.   
18.     public void setMaxActive(Integer maxActive) {  
19.         this.maxActive = maxActive;  
20.     }  
21.   
22.   
23.     public void setIdleTime(Integer idleTime) {  
24.         this.idleTime = idleTime;  
25.     }  
26.   
27.   
28.     public void setService(String service) {  
29.         this.service = service;  
30.     }  
31.   
32.   
33.     public void setServerAddress(String serverAddress) {  
34.         this.serverAddress = serverAddress;  
35.     }  
36.   
37.   
38.     public void setAddressProvider(ThriftServerAddressProvider addressProvider) {  
39.         this.addressProvider = addressProvider;  
40.     }  
41.   
42.     private Class objectClass;  
43.       
44.     private GenericObjectPool<TServiceClient> pool;  
45.       
46.     private PoolOperationCallBack callback = new PoolOperationCallBack() {  
47.           
48.         @Override  
49.         public void make(TServiceClient client) {  
50.             System.out.println("create");  
51.               
52.         }  
53.           
54.         @Override  
55.         public void destroy(TServiceClient client) {  
56.             System.out.println("destroy");  
57.               
58.         }  
59.     };  
60.   
61.     @Override  
62.     public void afterPropertiesSet() throws Exception {  
63.         if(serverAddress != null){  
64.             addressProvider = new FixedAddressProvider(serverAddress);  
65.         }  
66.         ClassLoader classLoader = Thread.currentThread().getContextClassLoader();  
67.         //加载Iface接口  
68.         objectClass = classLoader.loadClass(service + "$Iface");  
69.         //加载Client.Factory类  
70.         Class<TServiceClientFactory<TServiceClient>> fi = (Class<TServiceClientFactory<TServiceClient>>)classLoader.loadClass(service + "$Client$Factory");  
71.         TServiceClientFactory<TServiceClient> clientFactory = fi.newInstance();  
72.         ThriftClientPoolFactory clientPool = new ThriftClientPoolFactory(addressProvider, clientFactory,callback);  
73.         GenericObjectPool.Config poolConfig = new GenericObjectPool.Config();  
74.         poolConfig.maxActive = maxActive;  
75.         poolConfig.minIdle = 0;  
76.         poolConfig.minEvictableIdleTimeMillis = idleTime;  
77.         poolConfig.timeBetweenEvictionRunsMillis = idleTime/2L;  
78.         pool = new GenericObjectPool<TServiceClient>(clientPool,poolConfig);  
79.         proxyClient = Proxy.newProxyInstance(classLoader,new Class[]{objectClass},new InvocationHandler() {  
80.             @Override  
81.             public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {  
82.                 //  
83.                 TServiceClient client = pool.borrowObject();  
84.                 try{  
85.                     return method.invoke(client, args);  
86.                 }catch(Exception e){  
87.                     throw e;  
88.                 }finally{  
89.                     pool.returnObject(client);  
90.                 }  
91.             }  
92.         });  
93.     }  
94.   
95.     @Override  
96.     public Object getObject() throws Exception {  
97.         return proxyClient;  
98.     }  
99.   
100.     @Override  
101.     public Class<?> getObjectType() {  
102.         return objectClass;  
103.     }  
104.   
105.     @Override  
106.     public boolean isSingleton() {  
107.         return true;  //To change body of implemented methods use File | Settings | File Templates.  
108.     }  
109.       
110.     public void close(){  
111.         if(addressProvider != null){  
112.             addressProvider.close();  
113.         }  
114.     }  
115. }  

4. ThriftClientPoolFactory.java

    "Client"对象池,对象池中是已经实例化的Client对象,Client对象负责与Thrift server通信.

Java代码  

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

5. DynamicAddressProvider.java

    将zookeeper作为server地址的提供者,这样客户端就不需要再配置文件中指定一堆ip + port,而且当server服务有更新时,也不需要client端重新配置.

Java代码  

1. /** 
2.  * 可以动态获取address地址,方案设计参考 
3.  * 1) 可以间歇性的调用一个web-service来获取地址 
4.  * 2) 可以使用事件监听机制,被动的接收消息,来获取最新的地址(比如基于MQ,nio等) 
5.  * 3) 可以基于zookeeper-watcher机制,获取最新地址 
6.  * <p/> 
7.  * 本实例,使用zookeeper作为"config"中心,使用apache-curator方法库来简化zookeeper开发 
8.  * 如下实现,仅供参考 
9.  */  
10. public class DynamicAddressProvider implements ThriftServerAddressProvider, InitializingBean {  
11.   
12.     private String configPath;  
13.   
14.     private PathChildrenCache cachedPath;  
15.   
16.     private CuratorFramework zookeeper;  
17.       
18.     //用来保存当前provider所接触过的地址记录  
19.     //当zookeeper集群故障时,可以使用trace中地址,作为"备份"  
20.     private Set<String> trace = new HashSet<String>();  
21.   
22.     private final List<InetSocketAddress> container = new ArrayList<InetSocketAddress>();  
23.   
24.     private Queue<InetSocketAddress> inner = new LinkedList<InetSocketAddress>();  
25.       
26.     private Object lock = new Object();  
27.       
28.     private static final Integer DEFAULT_PRIORITY = 1;  
29.   
30.     public void setConfigPath(String configPath) {  
31.         this.configPath = configPath;  
32.     }  
33.   
34.     public void setZookeeper(CuratorFramework zookeeper) {  
35.         this.zookeeper = zookeeper;  
36.     }  
37.   
38.     @Override  
39.     public void afterPropertiesSet() throws Exception {  
40.         //如果zk尚未启动,则启动  
41.         if(zookeeper.getState() == CuratorFrameworkState.LATENT){  
42.             zookeeper.start();  
43.         }  
44.         buildPathChildrenCache(zookeeper, configPath, true);  
45.         cachedPath.start(StartMode.POST_INITIALIZED_EVENT);  
46.     }  
47.   
48.     private void buildPathChildrenCache(CuratorFramework client, String path, Boolean cacheData) throws Exception {  
49.         cachedPath = new PathChildrenCache(client, path, cacheData);  
50.         cachedPath.getListenable().addListener(new PathChildrenCacheListener() {  
51.             @Override  
52.             public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {  
53.                 PathChildrenCacheEvent.Type eventType = event.getType();  
54.                 switch (eventType) {  
55. //                    case CONNECTION_RECONNECTED:  
56. //                          
57. //                        break;  
58.                     case CONNECTION_SUSPENDED:  
59.                     case CONNECTION_LOST:  
60.                         System.out.println("Connection error,waiting...");  
61.                         return;  
62.                     default:  
63.                         //  
64.                 }  
65.                 //任何节点的时机数据变动,都会rebuild,此处为一个"简单的"做法.  
66.                 cachedPath.rebuild();  
67.                 rebuild();  
68.             }  
69.               
70.             protected void rebuild() throws Exception {  
71.                 List<ChildData> children = cachedPath.getCurrentData();  
72.                 if (children == null || children.isEmpty()) {  
73.                     //有可能所有的thrift server都与zookeeper断开了链接  
74.                     //但是,有可能,thrift client与thrift server之间的网络是良好的  
75.                     //因此此处是否需要清空container,是需要多方面考虑的.  
76.                     container.clear();  
77.                     System.out.println("thrift server-cluster error....");  
78.                     return;  
79.                 }  
80.                 List<InetSocketAddress> current = new ArrayList<InetSocketAddress>();  
81.                 for (ChildData data : children) {  
82.                     String address = new String(data.getData(), "utf-8");  
83.                     current.addAll(transfer(address));  
84.                     trace.add(address);  
85.                 }  
86.                 Collections.shuffle(current);  
87.                 synchronized (lock) {  
88.                     container.clear();  
89.                     container.addAll(current);  
90.                     inner.clear();  
91.                     inner.addAll(current);  
92.                       
93.                 }  
94.             }  
95.         });  
96.     }  
97.       
98.       
99.       
100.     private List<InetSocketAddress> transfer(String address){  
101.         String[] hostname = address.split(":");  
102.         Integer priority = DEFAULT_PRIORITY;  
103.         if (hostname.length == 3) {  
104.             priority = Integer.valueOf(hostname[2]);  
105.         }  
106.         String ip = hostname[0];  
107.         Integer port = Integer.valueOf(hostname[1]);  
108.         List<InetSocketAddress> result = new ArrayList<InetSocketAddress>();  
109.         for (int i = 0; i < priority; i++) {  
110.             result.add(new InetSocketAddress(ip, port));  
111.         }  
112.         return result;  
113.     }  
114.   
115.   
116.     @Override  
117.     public List<InetSocketAddress> getAll() {  
118.         return Collections.unmodifiableList(container);  
119.     }  
120.   
121.     @Override  
122.     public synchronized InetSocketAddress selector() {  
123.         if (inner.isEmpty()) {  
124.             if(!container.isEmpty()){  
125.                 inner.addAll(container);  
126.             }else if(!trace.isEmpty()){  
127.                 synchronized (lock) {  
128.                     for(String hostname : trace){  
129.                         container.addAll(transfer(hostname));  
130.                     }  
131.                     Collections.shuffle(container);  
132.                     inner.addAll(container);  
133.                 }  
134.             }  
135.         }  
136.         return inner.poll();//null  
137.     }  
138.   
139.   
140.     @Override  
141.     public void close() {  
142.         try {  
143.             cachedPath.close();  
144.             zookeeper.close();  
145.         } catch (Exception e) {  
146.             //  
147.         }  
148.     }  
149. }  

    到此为止,我们的Thrift基本上就可以顺利运行起来了.更多代码,参见附件.

    Thrift-server端开发与配置,参见[Thrift-server] 

[转载] Thrift-client与spring集成

原文：http://www.cnblogs.com/scott19820130/p/4919121.html