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Apache OFBiz 学习笔记 之 服务引擎 二

2013-06-28 15:39 323 查看
加载服务定义文件

ofbiz-component.xml:所有的服务定义文件在每个组件的ofbi-component.xml文件中

加载服务定义
例:framework/common/ofbiz-component.xml

<entity-resource type="model" reader-name="main" loader="main" location="entitydef/entitymodel.xml"/>
<entity-resource type="model" reader-name="main" loader="main" location="entitydef/entitymodel_olap.xml"/>
<entity-resource type="group" reader-name="main" loader="main" location="entitydef/entitygroup_olap.xml"/>
<entity-resource type="data" reader-name="seed" loader="main" location="data/CommonSecurityData.xml"/>
<entity-resource type="data" reader-name="seed" loader="main" location="data/CommonSystemPropertyData.xml"/>
<entity-resource type="data" reader-name="seed" loader="main" location="data/CommonTypeData.xml"/>
<entity-resource type="data" reader-name="seed" loader="main" location="data/CountryCodeData.xml"/>
<entity-resource type="data" reader-name="seed" loader="main" location="data/CurrencyData.xml"/>


服务参数

IN:输入参数,类似于java方法中的入参一样,一个ofibiz服务同样需要声明入参,声明方式为在attribute中添加属性mode="IN"
例:

<attribute name="partyId" type="String" mode="IN" optional="true"/>


OUT:输出参数,类似于java方法中会有返回值一样,一个ofbiz服务也需要声明输出参数,声明方式为在attribute中添加属性mode="OUT"
例:

<attribute name="noteId" type="String" mode="OUT"/>


INOUT:输入输出参数,为了方便起见,可以将一个参数既作为输入参数,又作为输出参数,声明方式为在attribute中添加属性mode="INOUT"
例:

<attribute name="nodeId" type="String" mode="INOUT"/>


隐含参数:如同servlet内置对象,在ofbiz服务中有少数参数已经在框架中定义了,无需声明就可以在服务中使用

name
type
mode
optional
说明
responseMessage
String
OUT
true
返回信息(success/error/fail)
errorMessage
String
OUT
true
错误信息
errorMessageList
java.util.List
OUT
true
错误信息列表
successMessage
String
OUT
true
成功信息
successMessageList
java.util.List
OUT
true
成功信息列表
userLoginorg.ofbiz.entity.GenericValueINOUTtrue登陆用户对象,用于权限验证
localejava.util.LocaleINOUTtrue国际化本地对象
可选/必选参数:服务的参数可以是可选,也可以是必须。必须输入的参数在服务调用之前会做检验,如果输入参数的名字及对象类型与声明不符,服务就不会被调用(报错)。必须的输出参数在服务调用之后会被检验,如果输出参数的名字及对象类型与声明不符,会导致服务失败(报错)。只有声明为必须的参数才被检验,同样如果你传入了一个没有意义的参数,也将导致服务调用失败。声明方式为在attribute中添加属性optional="true"/optional="false"(缺省)
例:

<attribute name="partyId" type="String" mode="IN" optional="true"/>
<attribute name="partyId" type="String" mode="IN" optional="false"/>


Interface服务引擎
interface服务引擎实现了在定义服务时可以共享同样的参数。interface服务是不可以被调用的,它仅作为其他服务继承而定义。每个接口服务都需要用interface服务引擎来定义
例:applications/order/servicedef/services.xml

<!-- mass order changes -->
<service name="massOrderChangeInterface" engine="interface" location="" invoke="">
<description>Interface for Mass Order Change Services</description>
<attribute name="orderIdList" type="List" mode="IN" optional="false"/>
</service>


继承上述的接口来实现新的服务
例:applications/order/servicedef/services.xml

<service name="massPickOrders" engine="java" transaction-timeout="300"
location="org.ofbiz.order.order.OrderServices" invoke="massPickOrders" auth="true">
<implements service="massOrderChangeInterface"/>
</service>
<service name="massChangeOrderApproved" engine="java" transaction-timeout="300"
location="org.ofbiz.order.order.OrderServices" invoke="massChangeApproved" auth="true">
<implements service="massOrderChangeInterface"/>
</service>
<service name="massProcessOrders" engine="java" transaction-timeout="300"
location="org.ofbiz.order.order.OrderServices" invoke="massProcessOrders" auth="true">
<implements service="massOrderChangeInterface"/>
</service>


然后我们分别查看java类org.ofbiz.order.order.OrderServices中的方法massPickOrders、massChangeApproved、massProcessOrders
代码片中都存在如下代码,可以获取参数接口定义的变量orderIdList

// make the list per facility
List<String> orderIds = UtilGenerics.checkList(context.get("orderIdList"));


覆盖接口,覆盖接口中的属性或新增属性
例:applications/order/servicedef/services.xml

<service name="massPrintOrders" engine="java" transaction-timeout="300"
location="org.ofbiz.order.order.OrderServices" invoke="massPrintOrders" auth="true">
<implements service="massOrderChangeInterface"/>
<attribute name="screenLocation" type="String" mode="IN" optional="false"/>
<attribute name="printerName" type="String" mode="IN" optional="true"/>
</service>


查看代码java类org.ofbiz.order.order.OrderServices中的方法massPrintOrders

String screenLocation = (String) context.get("screenLocation");
String printerName = (String) context.get("printerName");

// make the list per facility
List<String> orderIds = UtilGenerics.checkList(context.get("orderIdList"));


实现服务
实现一个服务可以用一个或多个服务引擎来实现,这里描述下常用的实现方法
java:用java代码实习服务
首先定义java类型的服务
服务定义:applications/party/servicedef/services_view.xml

<service name="getPerson" engine="java"
location="org.ofbiz.party.party.PartyServices" invoke="getPerson">
<description>Gets a person entity from the cache/database</description>
<attribute name="partyId" type="String" mode="IN"/>
<attribute name="lookupPerson" type="org.ofbiz.entity.GenericValue" mode="OUT"/>
</service>


engine: java
location:指向带包路径的类名
invoke:静态的方法名称
代码
1、参数通过Map方式传递给java方法
2、在java事件中GenericValue类型的userLogin、Locale类型的locale作为属性加入到request中
3、第一个参数DispatchContext包含访问数据库、调用其他服务的工具
4、从java代码中如下访问便利的对象
GenericValue userLogin = (GenericValue)context.get("userLogin");
Locale locale = (Locale)context.get("locale");
Delegator delegator = dctx.getDelegator();

安全和访问控制
例:详细参考/applications/order/src/org/ofbiz/order/order/OrderLookupServices.java

public static Map<String, Object> findOrders(DispatchContext dctx, Map<String, ? extends Object> context) {
Security security = dctx.getSecurity();
// check security flag for purchase orders
boolean canViewPo = security.hasEntityPermission("ORDERMGR", "_PURCHASE_VIEW", userLogin);
if (!canViewPo) {
conditions.add(EntityCondition.makeCondition("orderTypeId", EntityOperator.NOT_EQUAL, "PURCHASE_ORDER"));
}
}


服务返回
服务必须返回一个map,这个map至少包含一个responseMessage
ModelService.RESPOND_SUCCESS
ModelService.RESPOND_ERROR
ModelService.RESPOND_FAIL

simple:使用minilang开发的服务详细使用方法参考后续的《minilang开发 学习笔记 》系列
脚本:applications/party/servicedef/services.xml

<!-- Party Relationship services -->
<service name="createPartyRelationship" default-entity-name="PartyRelationship" engine="simple"
location="component://party/script/org/ofbiz/party/party/PartyServices.xml" invoke="createPartyRelationship" auth="true">
<description>
Create a Relationship between two Parties;
if partyIdFrom is not specified the partyId of the current userLogin will be used;
if roleTypeIds are not specified they will default to "_NA_".
If a partyIdFrom is passed in, it will be used if the userLogin has PARTYMGR_REL_CREATE permission.
</description>
<permission-service service-name="partyRelationshipPermissionCheck" main-action="CREATE"/>
<auto-attributes include="pk" mode="IN" optional="true"/>
<auto-attributes include="nonpk" mode="IN" optional="true"/>
<override name="partyIdTo" optional="false"/>
</service>


engine: simple
location:实现文件的全路径
invoke:simple-method

<!-- PartyRelationship services -->
<simple-method method-name="createPartyRelationship" short-description="createPartyRelationship">
<if-empty field="parameters.roleTypeIdFrom"><set field="parameters.roleTypeIdFrom" value="_NA_"/></if-empty>
<if-empty field="parameters.roleTypeIdTo"><set field="parameters.roleTypeIdTo" value="_NA_"/></if-empty>
<if-empty field="parameters.partyIdFrom"><set field="parameters.partyIdFrom" from-field="userLogin.partyId"/></if-empty>

<if-empty field="parameters.fromDate"><now-timestamp field="parameters.fromDate"/></if-empty>

<!-- check if not already exist -->
<entity-and entity-name="PartyRelationship" list="partyRels" filter-by-date="true">
<field-map field-name="partyIdFrom" from-field="parameters.partyIdFrom"/>
<field-map field-name="roleTypeIdFrom" from-field="parameters.roleTypeIdFrom"/>
<field-map field-name="partyIdTo" from-field="parameters.partyIdTo"/>
<field-map field-name="roleTypeIdTo" from-field="parameters.roleTypeIdTo"/>
</entity-and>

<if-empty field="partyRels">
<make-value value-field="newEntity" entity-name="PartyRelationship"/>
<set-pk-fields map="parameters" value-field="newEntity"/>
<set-nonpk-fields map="parameters" value-field="newEntity"/>
<create-value value-field="newEntity"/>
</if-empty>
</simple-method>


entity-auto服务
例:specialpurpose/example/servicedef/services.xml

<!-- Example & Related Services -->
<service name="createExample" default-entity-name="Example" engine="entity-auto" invoke="create" auth="true">
<description>Create a Example</description>
<permission-service service-name="exampleGenericPermission" main-action="CREATE"/>
<auto-attributes include="pk" mode="OUT" optional="false"/>
<auto-attributes include="nonpk" mode="IN" optional="true"/>
<override name="exampleTypeId" optional="false"/>
<override name="statusId" optional="false"/>
<override name="exampleName" optional="false"/>
</service>


RMI服务
例:applications/accounting/servicedef/services_rita.xml

<!-- RiTA (Remote) Implementations -->
<service name="ritaCCAuthRemote" engine="rmi"
location="rita-rmi" invoke="ritaCCAuth">
<description>RiTA Credit Card Pre-Authorization/Sale</description>
<implements service="ccAuthInterface"/>
</service>


engine:rmi
location:rita-rmi这个是是在serviceengine.xml中配置的

<service-location name="rita-rmi" location="rmi://localhost:1099/RMIDispatcher"/>


invoke:ritaCCAuth 服务名,该服务如下,也在applications/accounting/servicedef/services_rita.xml中

<!-- RiTA (Local) Implementations -->
<service name="ritaCCAuth" engine="java" export="true"
location="org.ofbiz.accounting.thirdparty.gosoftware.RitaServices" invoke="ccAuth">
<description>RiTA Credit Card Pre-Authorization/Sale</description>
<implements service="ccAuthInterface"/>
</service>


设置为可被远程调用 export=“true”

route 服务
这类类型不常用,路由服务使用路由引擎定义,当一个路由服务被调用时,不会执行调用,但是所有定义的ECA会在适当事件中运行。通过利用ECA服务选项可以路由(‘route‘)到其他服务

http服务
使用http服务是调用定义在其他系统上远程服务的一种方法。本地定义应该和远程定义一致,但是引擎应该是http,location应该是httpService事件在远程系统上运行的完全URL,方法应该是远程系统上被调用运行的服务名。远程系统必须有挂在HTTP服务上公允的httpService事件。默认情况下,commonapp web应用程序有用来接收服务请求的这样的事件。在远程系统上的服务必须将export属性设为true允许远程调用。HTTP服务本质就是同步的。

JMS服务
JMS服务和HTTP服务很相似,除了服务请求被发送到JMS topic/queue。engine属性应该设置为jms,location属性应该设置为在serviceengine.xml文件中定义的JMS服务名。方法应该是你请求要执行的远程系统上的JMS服务名。本质就是异步

服务组
服务组由多个服务组成的集合。
组的定义:包含一个拥有多个service元素的group元素。group元素包含name属性和mode属性
mode用来定义服务怎么执行
service:类似于ECA中的action元素,不同之处在于resutl-to-context属性的默认值不同。
例:applications/workeffort/servicedef/service_groups.xml

<service-group xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://ofbiz.apache.org/dtds/service-group.xsd">

<group name="updateWorkEffortAndAssoc" send-mode="all"  >
<invoke name="updateWorkEffort" mode="sync"/>
<invoke name="updateWorkEffortAssoc" mode="sync"/>
</group>
<group name="createWorkEffortRequestItemAndRequestItem" send-mode="all"  >
<invoke name="checkCustRequestItemExists" mode="sync"  result-to-context="true"/>
<invoke name="createWorkEffortRequestItem" mode="sync"/>
</group>
</service-group>


调用服务
调用一个存在的服务是非常简单的,可以通过webtools的Service Engine Tools查看具体的服务信息
1、java:使用java方式调用服务
例:applications/content/src/org/ofbiz/content/search/SearchEvents.java

public static String indexTree(HttpServletRequest request, HttpServletResponse response) {

Map<String, Object> result;
Map<String, Object> serviceInMap = FastMap.newInstance();
HttpSession session = request.getSession();
GenericValue userLogin = (GenericValue)session.getAttribute("userLogin");
serviceInMap.put("userLogin", userLogin);
LocalDispatcher dispatcher = (LocalDispatcher) request.getAttribute("dispatcher");
Map<String, Object> paramMap = UtilHttp.getParameterMap(request);
String siteId = (String)paramMap.get("contentId");
serviceInMap.put("contentId", siteId);
try {
result = dispatcher.runSync("indexTree", serviceInMap);
} catch (GenericServiceException e) {
String errorMsg = "Error calling the indexTree service." + e.toString();
Debug.logError(e, errorMsg, module);
request.setAttribute("_ERROR_MESSAGE_", errorMsg + e.toString());
return "error";
}
String errMsg = ServiceUtil.getErrorMessage(result);
if (Debug.infoOn()) Debug.logInfo("errMsg:" + errMsg, module);
if (Debug.infoOn()) Debug.logInfo("result:" + result, module);
if (UtilValidate.isEmpty(errMsg)) {
List<String> badIndexList = UtilGenerics.checkList(result.get("badIndexList"));
if (Debug.infoOn()) Debug.logInfo("badIndexList:" + badIndexList, module);
String badIndexMsg = StringUtil.join(badIndexList, "\n") + badIndexList.size() + " entities not indexed";
Integer goodIndexCount = (Integer)result.get("goodIndexCount");
String goodIndexMsg = goodIndexCount + " entities indexed.";
if (Debug.infoOn()) Debug.logInfo("goodIndexCount:" + goodIndexCount, module);
ServiceUtil.setMessages(request, badIndexMsg, goodIndexMsg, null);
return "success";
} else {
ServiceUtil.setMessages(request, errMsg, null, null);
return "error";
}
}


调用服务

try {
result = dispatcher.runSync("indexTree", serviceInMap);
} catch (GenericServiceException e) {
String errorMsg = "Error calling the indexTree service." + e.toString();
Debug.logError(e, errorMsg, module);
request.setAttribute("_ERROR_MESSAGE_", errorMsg + e.toString());
return "error";
}


如上调用了indxTree服务,该服务在applications/content/servicedef/services.xml中被定义

<service name="indexTree" auth="true" engine="java" validate="true" transaction-timeout="7200"
location="org.ofbiz.content.search.SearchServices" invoke="indexTree">
<description>Index content under publish point</description>
<attribute mode="IN" name="contentId" optional="false" type="String"/>
<attribute mode="OUT" name="badIndexList" optional="true" type="List"/>
<attribute mode="OUT" name="goodIndexCount" optional="true" type="Integer"/>
</service>


2、smiple-method:使用simple-method方式调用服务

例:applications/accounting/script/org/ofbiz/accounting/payment/PaymentServices.xml

<simple-method method-name="createPaymentAndApplication" short-description="Create a payment and a payment application for the full amount">
<set-service-fields service-name="createPayment" map="parameters" to-map="createPaymentInMap"/>
<call-service service-name="createPayment" in-map-name="createPaymentInMap">
<result-to-field field="paymentId" result-name="paymentId"/>
</call-service>
<check-errors/>
<set-service-fields service-name="createPaymentApplication" map="parameters" to-map="createPaymentAppInMap"/>
<set field="createPaymentAppInMap.paymentId" from-field="paymentId"/>
<set field="createPaymentAppInMap.amountApplied" from-field="parameters.amount"/>
<call-service service-name="createPaymentApplication" in-map-name="createPaymentAppInMap">
<result-to-field field="paymentApplicationId" result-name="paymentApplicationId"/>
</call-service>
<check-errors/>
<field-to-result field="paymentId" result-name="paymentId"/>
<field-to-result field="paymentApplicationId" result-name="paymentApplicationId"/>
</simple-method>


调用服务

<call-service service-name="createPayment" in-map-name="createPaymentInMap">
<result-to-field field="paymentId" result-name="paymentId"/>
</call-service>


该服务createPayment定义于applications/accounting/script/org/ofbiz/accounting/payment/PaymentServices.xml

<simple-method method-name="createPayment" short-description="Create a Payment">
<if>
<condition>
<and>
<not><if-has-permission permission="PAY_INFO" action="_CREATE"/></not>
<not><if-compare-field field="userLogin.partyId" to-field="parameters.partyIdFrom" operator="equals"/></not>
<not><if-compare-field field="userLogin.partyId" to-field="parameters.partyIdTo" operator="equals"/></not>
</and>
</condition>
<then>
<add-error>
<fail-property resource="AccountingUiLabels" property="AccountingCreatePaymentPermissionError"/>
</add-error>
</then>
</if>
<check-errors/>

<make-value entity-name="Payment" value-field="payment"/>
<if-empty field="parameters.paymentId">
<sequenced-id sequence-name="Payment" field="payment.paymentId"/>
<else>
<set field="payment.paymentId" from-field="parameters.paymentId"/>
</else>
</if-empty>
<field-to-result field="payment.paymentId" result-name="paymentId"/>

<if-not-empty field="parameters.paymentMethodId">
<entity-one entity-name="PaymentMethod" value-field="paymentMethod">
<field-map field-name="paymentMethodId" from-field="parameters.paymentMethodId"/>
</entity-one>
<if-compare-field field="parameters.paymentMethodTypeId" operator="not-equals" to-field="paymentMethod.paymentMethodTypeId">
<log level="info" message="Replacing passed payment method type [${parameters.paymentMethodTypeId}] with payment method type [${paymentMethod.paymentMethodTypeId}] for payment method [${parameters.paymentMethodId}]"/>
<set field="parameters.paymentMethodTypeId" from-field="paymentMethod.paymentMethodTypeId"/>
</if-compare-field>
</if-not-empty>
<if-not-empty field="parameters.paymentPreferenceId">
<entity-one value-field="orderPaymentPreference" entity-name="OrderPaymentPreference">
<field-map field-name="orderPaymentPreferenceId" from-field="parameters.paymentPreferenceId"/>
</entity-one>
<if-empty field="parameters.paymentMethodId">
<set field="parameters.paymentMethodId" from-field="orderPaymentPreference.paymentMethodId"/>
</if-empty>
<if-empty field="parameters.paymentMethodTypeId">
<set field="parameters.paymentMethodTypeId" from-field="orderPaymentPreference.paymentMethodTypeId"/>
</if-empty>
</if-not-empty>
<if-empty field="parameters.paymentMethodTypeId">
<add-error>
<fail-property resource="AccountingUiLabels" property="AccountingPaymentMethodIdPaymentMethodTypeIdNullError"/>
</add-error>
</if-empty>

<set-nonpk-fields map="parameters" value-field="payment"/>
<if-empty field="payment.effectiveDate">
<now-timestamp field="payment.effectiveDate"/>
</if-empty>
<create-value value-field="payment"/>
</simple-method>


异步方式调用

<simple-method method-name="sendInvoicePerEmail" short-description="Send an invoice per Email">
<set-service-fields service-name="sendMailFromScreen" map="parameters" to-map="emailParams"/>
<set field="emailParams.xslfoAttachScreenLocation" value="component://accounting/widget/AccountingPrintScreens.xml#InvoicePDF"/>
<set field="emailParams.bodyParameters.invoiceId" from-field="parameters.invoiceId"/>
<set field="emailParams.bodyParameters.userLogin" from-field="parameters.userLogin"/>
<set field="emailParams.bodyParameters.other" from-field="parameters.other"/><!-- to to print in 'other currency' -->
<call-service-asynch service-name="sendMailFromScreen" in-map-name="emailParams"/>
<property-to-field resource="AccountingUiLabels" property="AccountingEmailScheduledToSend" field="successMessage"/>
</simple-method>


异步调用代码

<call-service-asynch service-name="sendMailFromScreen" in-map-name="emailParams"/>


服务中的事务申明
一个服务是否使用事务,是否必须是独立的事务,以及事务的超时时间设置,均可以在服务定义时声明,或者在通过服务引擎调用服务时指定(传入)
1、服务定义时申明事务
例:applications/order/servicedef/services.xml

<service name="sendOrderConfirmation" engine="java" require-new-transaction="true" max-retry="3"
location="org.ofbiz.order.order.OrderServices" invoke="sendOrderConfirmNotification">
<description>Send a order confirmation</description>
<implements service="orderNotificationInterface"/>
</service>


2、在服务调用时指定
java代码

dispatcher.runSync(servicename, context,transactionTimeOut,requireNewTransaction);
dispatcher.runAsync(servicename, context,requester,persist,transactionTimeOut,requireNewTransaction);


事务的管理规则
1、调用服务时传入的参数(是否为独立事务、事务的超时时间)的优先级高于服务定义时定义的参数
2、若服务在定义时声明了不使用事务(use-transaction="false"),那么无论是定义什么的独立事务和超市时间,还是调用服务的时候定义了独立事务和超市时间,都将不会生效
3、服务被申明为不使用事务,则所有的默认为每次操作位一个独立的事务

事务的提交规则
1、没有在服务内部显示操作事务的情况下,事务由服务引擎来管理,当服务返回error时,回滚事务;当服务返回failure或success时提交事务
2、服务间调用使用同一个事务时,内层服务返回failure或success,不提交事务,在最外层服务返回时方提交
3、服务间调用使用同一个事务时,任何一个服务返回error,事务均会回滚。
4、服务间调用使用独立事务时,一个事务回滚或提交不影响其他事务,但一个事务不能访问另一个事务尚未提交的数据
5、服务执行超时,回滚事务

服务超时
1、服务执行是否超时由服务引擎来控制,超时时间,在定义服务时指定,或调用服务的时候指定,若不指定,默认时间为60秒
2、这个超时时间为服务执行的总时间,包括服务内部执行的其他操作时间的总和
3、如果没有开启事务,则配置超时时间也不会生效。

EEAC、SEAC、MCA概念
EEAC:在实体上触发一个服务的调用
SEAC:当条件满足时,调用另外一个服务
MCA:启动javamail-container
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