张开涛：超时与重试机制(2)

<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close"> 
    <!--Statement默认超时时间 --> 
    <property name="defaultQueryTimeout" value="3"/> 
  
    <!-- 另外可以通过如下配置来配置socket连接/读超时：--> 
    <property name="connectionProperties" 
             value="connectTimeout=2000; socketTimeout=2000 "/> 
    <!--这个是等待获取连接池连接时间，也不要太大，比如设置在500毫秒--> 
    <property name="maxWaitMillis" value="500"/> 
</bean> 
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<property name="connectionProperties" 
value="oracle.net.CONNECT_TIMEOUT=2000;oracle.jdbc.ReadTimeout=2000"/> 
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<settings cacheModelsEnabled="false"enhancementEnabled="true" 
lazyLoadingEnabled="false"errorTracingEnabled="true" maxRequests="32" 
defaultStatementTimeout="2"/> 
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<insert……timeout="2"> 
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<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> 
  <propertynamepropertyname="dataSource" ref="dataSource" /> 
  <propertynamepropertyname="defaultTimeout" value="3"/> 
</bean> 
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//先获取@Transactional定义的timeout，如果没有，则使用defaultTimeout 
int timeout =determineTimeout(definition); 
if (timeout !=TransactionDefinition.TIMEOUT_DEFAULT) {  
   txObject.getConnectionHolder().setTimeoutInSeconds(timeout);  
}  
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public voidsetTimeoutInSeconds(int seconds) { 
    setTimeoutInMillis(seconds* 1000); 
} 
  
public voidsetTimeoutInMillis(long millis) { 
    this.deadline = newDate(System.currentTimeMillis() + millis);   
} 
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public int getTimeToLiveInSeconds() { 
    double diff = ((double) getTimeToLiveInMillis()) /1000; 
    int secs = (int) Math.ceil(diff); 
    checkTransactionTimeout(secs <= 0); 
    return secs; 
} 
  
public long getTimeToLiveInMillis() throwsTransactionTimedOutException{ 
    if (this.deadline == null) { 
        throw new IllegalStateException("No timeoutspecified for this resource holder"); 
    } 
    long timeToLive = this.deadline.getTime() -System.currentTimeMillis(); 
    checkTransactionTimeout(timeToLive <= 0); 
    return timeToLive; 
} 
  
private void checkTransactionTimeout(booleandeadlineReached) throws TransactionTimedOutException { 
    if (deadlineReached) { 
        setRollbackOnly(); 
       throw newTransactionTimedOutException("Transaction timed out: deadline was " +this.deadline); 
    } 
} 
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public static void applyTimeout(Statement stmt,DataSource dataSource, int timeout) throws SQLException { 
    ConnectionHolder holder =         (ConnectionHolder)TransactionSynchronizationManager.getResource(dataSource); 
    if (holder != null && holder.hasTimeout()){ 
        // 计算剩余的事务超时时间覆盖Statement超时 
       stmt.setQueryTimeout(holder.getTimeToLiveInSeconds()); 
    } else if (timeout > 0) { 
        //如果没有配置事务超时，则使用Statement超时 
       stmt.setQueryTimeout(timeout); 
    } 
} 
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<mongo:mongo id="tryMongo"replica-set="${try.mongo.hostAndPorts}"> 
   <mongo:options 
           connections-per-host="${mongo.connectionsPerHost}" 
           threads-allowed-to-block-for-connection-multiplier="${mongo.threadsAllowedToBlockForConnectionMultiplier}" 
           max-wait-time="${mongo.maxWaitTime}" 
           connect-timeout="${mongo.connectTimeout}" 
           socket-timeout="${mongo.socketTimeout}" 
           socket-keep-alive="${mongo.socketKeepAlive}" 
           auto-connect-retry="${mongo.autoConnectRetry}" /> 
</mongo:mongo> 
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PoolJedisConnectionFactory connectionFactory = new PoolJedisConnectionFactory(); 
connectionFactory.setMaxWaitMillis(maxWaitMillis); 
connectionFactory.setTimeout(timeoutInMillis); 
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this.socket.connect(new InetSocketAddress(this.host, this.port),this. timeout); 
this.socket.setSoTimeout(this.timeout); 
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$.ajax({ 
    url:"http://ins.jd.com:9090/test", 
    dataType:"jsonp", 
    jsonp:"test", 
    jsonpCallback:"test", 
    timeout:2000, 
    success:function(result,status,xhr) { 
       //success 
    }, 
    error: function(result,status,xhr){ 
        if(status== 'timeout') { 
            //timeout 
        } 
    } 
}); 
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var id = setTimeout(retryCallback, 5000); 
$.ajax({ 
   dataType: 'jsonp', 
    success:function() { 
       clearTimeout(id); 
        ... 
    } 
}); 
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