我是SAP JCo的新手我需要使用SAP Jco调用多个SAP系统。但我无法同时连接多个sap系统......
这是代码:
package com.sap.test;
import java.util.Properties;
import com.sap.conn.jco.JCoDestination;
import com.sap.conn.jco.JCoDestinationManager;
import com.sap.conn.jco.JCoException;
import com.sap.conn.jco.JCoRepository;
import com.sap.conn.jco.ext.DestinationDataProvider;
import com.sap.conn.jco.ext.Environment;
import com.sap.utils.MyDestinationDataProvider;
import com.sap.utils.SapSystem;
public class TestMultipleSAPConnection {
public static Properties properties;
public static JCoDestination dest = null;
public static JCoRepository repos = null;
public static SapSystem system = null;
String SAP_SERVER = "SAP_SERVER";
MyDestinationDataProvider myProvider = null;
public static void main(String[] args) throws JCoException {
getConnection_CRM();
getConnection_R3();
}
public static JCoDestination getConnection_R3() {
boolean connR3_flag = true;
JCoDestination dest = null;
JCoRepository repos = null;
String SAP_SERVER = "SAP_SERVER";
Properties properties = new Properties();
SapSystem system = new SapSystem();
system.setClient("100");
system.setHost("r3devsvr.myweb.com");
system.setLanguage("en");
system.setSystemNumber("00");
system.setUser("SAP-R3-USER");
system.setPassword("init1234");
properties.setProperty("jco.client.ashost", system.getHost());
properties.setProperty("jco.client.sysnr", system.getSystemNumber());
properties.setProperty("jco.client.client", system.getClient());
properties.setProperty("jco.client.user", system.getUser());
properties.setProperty("jco.client.passwd", system.getPassword());
properties.setProperty("jco.client.lang", system.getLanguage());
System.out.println("******* Connection Parameter Set *******");
MyDestinationDataProvider myProvider = new MyDestinationDataProvider();
System.out.println("******* Destination Provider Set *******");
myProvider.changePropertiesForABAP_AS(properties);
if (!Environment.isDestinationDataProviderRegistered()) {
System.out.println("Registering Destination Provider R3");
Environment.registerDestinationDataProvider((DestinationDataProvider) myProvider);
}else{
System.out.println("Destination Provider already set..R3");
connR3_flag = false;
}
try {
dest = JCoDestinationManager.getDestination((String) SAP_SERVER);
repos = dest.getRepository();
if (repos == null) {
System.out.println("Repos is null.....");
} else {
System.out.println("Repos is not null.....");
}
System.out.println("After getting repos...");
if(connR3_flag){
System.out.println("R3 Connection Successfull...");
}
} catch (Exception ex) {
System.out.println(ex);
}
return dest;
}
public static JCoDestination getConnection_CRM() {
boolean connCRM_flag = true;
JCoDestination dest = null;
JCoRepository repos = null;
String SAP_SERVER = "SAP_SERVER";
Properties properties = new Properties();
SapSystem system = new SapSystem();
system.setClient("200");
system.setHost("crmdevsvr.myweb.com");
system.setLanguage("en");
system.setSystemNumber("00");
system.setUser("SAP-CRM-USER");
system.setPassword("init1234");
properties.setProperty("jco.client.ashost", system.getHost());
properties.setProperty("jco.client.sysnr", system.getSystemNumber());
properties.setProperty("jco.client.client", system.getClient());
properties.setProperty("jco.client.user", system.getUser());
properties.setProperty("jco.client.passwd", system.getPassword());
properties.setProperty("jco.client.lang", system.getLanguage());
System.out.println("******* Connection Parameter Set *******");
MyDestinationDataProvider myProvider = new MyDestinationDataProvider();
System.out.println("******* Destination Provider Set *******");
myProvider.changePropertiesForABAP_AS(properties);
if (!Environment.isDestinationDataProviderRegistered()) {
System.out.println("Registering Destination Provider CRM");
Environment.registerDestinationDataProvider((DestinationDataProvider) myProvider);
}else{
System.out.println("Destination Provider already set..CRM");
connCRM_flag = false;
}
try {
dest = JCoDestinationManager.getDestination((String) SAP_SERVER);
repos = dest.getRepository();
if (repos == null) {
System.out.println("Repos is null.....");
} else {
System.out.println("Repos is not null.....");
}
System.out.println("After getting repos...");
if(connCRM_flag){
System.out.println("CRM Connection Successfull...");
}
} catch (Exception ex) {
System.out.println(ex);
}
return dest;
}
}
答案 0 :(得分:3)
JCo JavaDoc文档说:
只能注册DestinationDataProvider的一个实现。 为了注册另一个实现,基础设施首先要实现 取消注册当前注册的实现。它不是 建议永久交换DestinationDataProvider 注册。一个注册的实例应该全局管理所有 整个基础架构环境的目标配置。
因此,您必须注册DestinationDataProvider
的一个实例,这是您的班级MyDestinationDataProvider
的一个实例。
此实现需要管理和存储所有SAP系统的所有不同登录配置,可通过不同的目标名称字符串访问。一个简单的HashMap<String, Properties>
将是一个足够的存储形式。将具有不同目标名称字符串的两个Properties
实例添加到HashMap
,并从方法Properties
返回与传递的destinationName关联的MyDestinationDataProvider.getDestinationProperties(String destinationName)
实例。
因此,您可以通过其特定目标名称访问针对任何SAP系统的所需JCoDestination
实例。在您的示例中,您使用了&#34; SAP_SERVER&#34;对于两个不能工作的目的地配置。例如,请改用SAP系统ID(SID)作为目标名称(密钥)。
如果使用示例中的名称,那么JCoDestinationManager.getDestination("CRM")
将返回系统的JCoDestination
实例&#34; CRM&#34;和JCoDestinationManager.getDestination("R3")
系统的JCoDestination
&#34; R3&#34;。两者都可以独立使用。那就是它。
答案 1 :(得分:-1)
与您分享我最近提出的针对此确切问题的解决方案。我发现了两种不同的方法来实现CustomDestinationDataProvider,以便我可以使用多个目标。
我使用我的两种不同解决方案所做的一些事情是更改了CustomDestinationDataProvider中实例化MyDestinationDataProvider内部类的方法,以便返回JCoDestination而不是返回ArrayList。我将此方法的名称从executeSAPCall更改为getDestination。
我发现的第一种允许我使用多个目的地,成功更换目的地的方法是为MyDestinationDataProvider引入一个类变量,以便我可以保留我的实例化版本。请注意,对于此解决方案,CustomDestinationDataProvider类仍嵌入在我的Java应用程序代码中。
我发现此解决方案仅适用于一个应用程序。我无法在同一个tomcat服务器上的多个应用程序中使用此机制,但至少我终于能够成功切换目标。以下是第一个解决方案的CustomDestinationDataProvider.java代码:
public class CustomDestinationDataProvider {
private MyDestinationDataProvider gProvider; // class version of MyDestinationDataProvider
public class MyDestinationDataProvider implements DestinationDataProvider {
private DestinationDataEventListener eL;
private HashMap<String, Properties> secureDBStorage = new HashMap<String, Properties>();
public Properties getDestinationProperties(String destinationName) {
try {
Properties p = secureDBStorage.get(destinationName);
if(p!=null) {
if(p.isEmpty())
throw new DataProviderException(DataProviderException.Reason.INVALID_CONFIGURATION, "destination configuration is incorrect", null);
return p;
}
return null;
} catch(RuntimeException re) {
System.out.println("getDestinationProperties: Exception detected!!! message = " + re.getMessage());
throw new DataProviderException(DataProviderException.Reason.INTERNAL_ERROR, re);
}
}
public void setDestinationDataEventListener(DestinationDataEventListener eventListener) {
this.eL = eventListener;
}
public boolean supportsEvents() {
return true;
}
public void changeProperties(String destName, Properties properties) {
synchronized(secureDBStorage) {
if(properties==null) {
if(secureDBStorage.remove(destName)!=null) {
eL.deleted(destName);
}
} else {
secureDBStorage.put(destName, properties);
eL.updated(destName); // create or updated
}
}
}
}
public JCoDestination getDestination(String destName, Properties connectProperties) {
MyDestinationDataProvider myProvider = new MyDestinationDataProvider();
boolean destinationDataProviderRegistered = com.sap.conn.jco.ext.Environment.isDestinationDataProviderRegistered();
if (!destinationDataProviderRegistered) {
try {
com.sap.conn.jco.ext.Environment.registerDestinationDataProvider(myProvider);
gProvider = myProvider; // save our destination data provider in the class var
} catch(IllegalStateException providerAlreadyRegisteredException) {
throw new Error(providerAlreadyRegisteredException);
}
} else {
myProvider = gProvider; // get the destination data provider from the class var.
}
myProvider.changeProperties(destName, connectProperties);
JCoDestination dest = null;
try {
dest = JCoDestinationManager.getDestination(destName);
} catch(JCoException e) {
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
}
return dest;
} } 这是我的servlet类中的代码,我用它来实例化并在我的应用程序代码中调用CustomDestinationDataProvider:
CustomDestinationDataProvider cddp = new CustomDestinationDataProvider();
SAPDAO sapDAO = new SAPDAO();
Properties p1 = getProperties("SAPSystem01");
Properties p2 = getProperties("SAPSystem02");
try {
JCoDestination dest = cddp.getDestination("SAP_R3_USERID_01", p1); // establish the first destination
sapDAO.searchEmployees(dest, searchCriteria); // call the first BAPI
dest = cddp.getDestination("SAP_R3_USERID_02", p2); // establish the second destination
sapDAO.searchAvailability(dest); // call the second BAPI
} catch (Exception e) {
e.printStackTrace();
}
同样,此解决方案仅适用于一个应用程序。如果您将此代码直接实现到多个应用程序中,则调用此代码的第一个应用程序将获取资源,而另一个应用程序将出错。
我提出的第二个解决方案允许多个java应用程序同时使用CustomDestinationDataProvider类。我从我的应用程序代码中打破了CustomDestinationDataProvider类,并为它创建了一个单独的java spring应用程序(不是Web应用程序),用于创建jar。然后我将MyDestinationDataProvider内部类转换为单例。以下是CustomDestinationDataProvider的单例版本的代码:
public class CustomDestinationDataProvider {
public static class MyDestinationDataProvider implements DestinationDataProvider {
////////////////////////////////////////////////////////////////////
// The following lines convert MyDestinationDataProvider into a singleton. Notice
// that the MyDestinationDataProvider class has now been declared as static.
private static MyDestinationDataProvider myDestinationDataProvider = null;
private MyDestinationDataProvider() {
}
public static MyDestinationDataProvider getInstance() {
if (myDestinationDataProvider == null) {
myDestinationDataProvider = new MyDestinationDataProvider();
}
return myDestinationDataProvider;
}
////////////////////////////////////////////////////////////////////
private DestinationDataEventListener eL;
private HashMap<String, Properties> secureDBStorage = new HashMap<String, Properties>();
public Properties getDestinationProperties(String destinationName) {
try {
Properties p = secureDBStorage.get(destinationName);
if(p!=null) {
if(p.isEmpty())
throw new DataProviderException(DataProviderException.Reason.INVALID_CONFIGURATION, "destination configuration is incorrect", null);
return p;
}
return null;
} catch(RuntimeException re) {
throw new DataProviderException(DataProviderException.Reason.INTERNAL_ERROR, re);
}
}
public void setDestinationDataEventListener(DestinationDataEventListener eventListener) {
this.eL = eventListener;
}
public boolean supportsEvents() {
return true;
}
public void changeProperties(String destName, Properties properties) {
synchronized(secureDBStorage) {
if(properties==null) {
if(secureDBStorage.remove(destName)!=null) {
eL.deleted(destName);
}
} else {
secureDBStorage.put(destName, properties);
eL.updated(destName); // create or updated
}
}
}
}
public JCoDestination getDestination(String destName, Properties connectProperties) throws Exception {
MyDestinationDataProvider myProvider = MyDestinationDataProvider.getInstance();
boolean destinationDataProviderRegistered = com.sap.conn.jco.ext.Environment.isDestinationDataProviderRegistered();
if (!destinationDataProviderRegistered) {
try {
com.sap.conn.jco.ext.Environment.registerDestinationDataProvider(myProvider);
} catch(IllegalStateException providerAlreadyRegisteredException) {
throw new Error(providerAlreadyRegisteredException);
}
}
myProvider.changeProperties(destName, connectProperties);
JCoDestination dest = null;
try {
dest = JCoDestinationManager.getDestination(destName);
} catch(JCoException ex) {
ex.printStackTrace();
throw ex;
} catch (Exception ex) {
ex.printStackTrace();
throw ex;
}
return dest;
}
}
将此代码放入jar文件应用程序并创建jar文件(我称之为JCOConnector.jar)后,我将jar文件放在tomcat服务器的共享库类路径上,然后重新启动tomcat服务器。就我而言,这是/ opt / tomcat / shared / lib。检查/opt/tomcat/conf/catalina.properties文件以获取共享库类路径位置的shared.loader行。我看起来像这样:
shared.loader=\
${catalina.home}/shared/lib\*.jar,${catalina.home}/shared/lib
我还将此jar文件的副本放在工作站上的“C:\ Users \ userid \ Documents \ jars”文件夹中,以便测试应用程序代码可以在jar中查看代码并进行编译。然后,我在我的两个测试应用程序中的pom.xml文件中引用了jar文件的这个副本:
<dependency>
<groupId>com.mycompany</groupId>
<artifactId>jcoconnector</artifactId>
<version>1.0</version>
<scope>system</scope>
<systemPath>C:\Users\userid\Documents\jars\JCOConnector.jar</systemPath>
</dependency>
将此添加到pom.xml文件后,我右键单击每个项目,选择Maven - &gt;更新项目...,然后我再次右键单击每个项目并选择“刷新”。我学到的一件非常重要的事情就是不要将JCOConnector.jar的副本直接添加到我的任何一个测试项目中。原因是因为我想要使用/opt/tomcat/shared/lib/JCOConnector.jar中jar文件中的代码。然后我构建并将每个测试应用程序部署到tomcat服务器。
在我的第一个测试应用程序中调用我的JCOConnector.jar共享库的代码如下所示:
CustomDestinationDataProvider cddp = new CustomDestinationDataProvider();
JCoDestination dest = null;
SAPDAO sapDAO = new SAPDAO();
Properties p1 = getProperties("SAPSystem01");
try {
dest = cddp.getDestination("SAP_R3_USERID_01", p1);
sapDAO.searchEmployees(dest);
} catch (Exception ex) {
ex.printStackTrace();
}
我的第二个测试应用程序中调用我的JCOConnector.jar共享库的代码如下所示:
CustomDestinationDataProvider cddp = new CustomDestinationDataProvider();
JCoDestination dest = null;
SAPDAO sapDAO = new SAPDAO();
Properties p2 = getProperties("SAPSystem02");
try {
dest = cddp.getDestination("SAP_R3_USERID_02", p2);
sapDAO.searchAvailability(dest);
} catch (Exception ex) {
ex.printStackTrace();
}
我知道我首先在工作站和服务器上安装SAP JCO 3库时遗漏了很多步骤。我希望这有助于至少有一个人试图让多个spring mvc java spplications在同一台服务器上与SAP交谈。“/ p>