处理相关对象Hyperledger作曲家

Question

型号：

namespace org.acme.model 

enum CustomerSegment { 
o P 
o E 
} 

asset Account identified by Account_No { 
    o String Account_No 
    --> Customer Account_Holder 
    o String Account_Type 
    o Integer Balance 
} 

participant Customer identified by Customer_ID { 
    o String Customer_ID 
    o String First_Name 
    o CustomerSegment Customer_Segment 
} 

transaction UpdateCustomerSegment{ 
    --> Account A 
    --> Customer C 
} 

transaction changeBalance{ 
    --> Account A 
    o Integer newBalance 
} 

    event UCS_Event{ 
    -->Account A 
    o String oldsegment 
    o String newsegment 
    } 

event BalanceChangEvent{ 
    -->Account A 
    o Integer oldbalance 
    o Integer newbalance 
} 

脚本：

/** 
    * Place an order for a vehicle 
    * @param {org.acme.model.UpdateCustomerSegment} ucs - the transaction that calculated Customer Segment 
    * @transaction 
    */ 

function UpdateCustomerSegment(ucs) 
{ 
    var CustomerID=ucs.C.Customer_ID; 
    var oldCS=ucs.C.Customer_Segment; 

    if(ucs.A.Balance>3000) 
    ucs.C.Customer_Segment="E" 
    else 
    ucs.C.Customer_Segment="P" 

    var cust = getParticipantRegistry('org.acme.model.Customer') 
    .then(function(participantRegistry){ 
    return participantRegistry.update(ucs.C); 
    }) 

    .then(function(){ 
    //Emit Event 
    var event_g= getFactory().newEvent('org.acme.model','UCS_Event'); 
    event_g.A=ucs.A; 
    event_g.oldsegment=oldCS; 
    event_g.newsegment=ucs.C.Customer_Segment 
    emit(event_g); 
    }) 

    return cust; 
} 

我需要做的是 - 仅传递帐号的交易。 交易应取回适当的客户 - 其中客户ID与账户的持有人相同，并更新客户的客户段

我无法做到这一点。它甚至是可行的。我是新的，所以不确定。

在我传递这两个帐号上述交易和客户ID

第二个问题 我们都可以在同一个事务更新参与者&资产？如果是的话。

3问题： 如何从另一个内部调用一个事务。

Answer 1

您的模型看起来不错，现在您需要编写一个交易处理器函数，该函数订阅UpdateCustomerSegment交易，并实现您的逻辑以更改客户的客户细分，然后坚持客户。

的basic-sample-network包括类似的简单的事务处理器：

/** 
* Sample transaction processor function. 
* @param {org.acme.sample.SampleTransaction} tx The sample transaction instance. 
* @transaction 
*/ 
function sampleTransaction(tx) { 

    // Save the old value of the asset. 
    var oldValue = tx.asset.value; 

    // Update the asset with the new value. 
    tx.asset.value = tx.newValue; 

    // Get the asset registry for the asset. 
    return getAssetRegistry('org.acme.sample.SampleAsset') 
     .then(function (assetRegistry) { 

      // Update the asset in the asset registry. 
      return assetRegistry.update(tx.asset); 

     }) 
     .then(function() { 

      // Emit an event for the modified asset. 
      var event = getFactory().newEvent('org.acme.sample', 'SampleEvent'); 
      event.asset = tx.asset; 
      event.oldValue = oldValue; 
      event.newValue = tx.newValue; 
      emit(event); 

     }); 

}