如何使用SAP jco登录多个SAP系统

时间:2016-09-21 09:18:00

标签: java sap crm sapjco3

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;

    }

}

2 个答案:

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>