我是Jco的新手,我需要使用SAP调用多个SAP系统。但我不能同时连接多个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;
}
}发布于 2017-01-17 22:19:43
JCo JavaDoc文档说:
只能注册DestinationDataProvider的一个实现。为了注册另一个实现,基础设施必须首先注销当前注册的实现。不建议永久交换DestinationDataProvider注册。一个已注册的实例应该全局管理整个基础结构环境的所有目标配置。
所以您必须注册DestinationDataProvider的一个实例,这是类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,这些配置可以通过一个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。将两个具有不同目标名称字符串的Properties实例添加到HashMap中,并从方法MyDestinationDataProvider.getDestinationProperties(String destinationName)返回与传递的destinationName相关联的Properties实例。因此,您可以通过其特定的目标名称访问针对任何JCoDestination系统的所需的实例。在您的示例中,两个目标配置都使用了"SAP_SERVER“,但这两种配置都无法工作。例如,使用SAP系统ID (SID)作为目标名称(键)。
如果使用示例中的名称,那么JCoDestinationManager.getDestination("CRM")将返回系统"CRM“的JCoDestination实例,并为系统"R3”返回JCoDestinationManager.getDestination("R3") JCoDestination。两者可以同时独立使用。就这样。
发布于 2017-10-27 14:06:46
与您分享一个解决方案,我最近提出了这个确切的问题。我发现了两种实现CustomDestinationDataProvider的不同方法,这样我就可以使用多个目的地。
对于这两种不同的解决方案,我所做的是改变了CustomDestinationDataProvider中实例化MyDestinationDataProvider内部类的方法,这样它就不会返回ArrayList,而是返回JCoDestination。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(成功地更改目的地)的方法是为MyDestinationDataProvider引入一个类变量,以便保留实例化的版本。请注意,对于这个解决方案,CustomDestinationDataProvider类仍然嵌入到我的java应用程序代码中。
我发现这个解决方案只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地切换目的地。下面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servlet类中的代码,用于在应用程序代码中实例化和调用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,此解决方案仅在一个应用程序中工作。如果您将此代码直接实现到多个应用程序中,那么第一个调用此代码的应用程序将获得该资源,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。我将CustomDestinationDataProvider类从我的应用程序代码中删除,并为它创建了一个单独的java应用程序(而不是一个web应用程序),目的是创建一个jar。然后,我将MyDestinationDataProvider内部类转换为单例。下面是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;
}
}在将此代码放入jar文件应用程序并创建jar文件(我称之为JCOConnector.jar)之后,我将jar文件放在tomcat服务器的共享库类路径上,并重新启动tomcat服务器。在我的例子中,这是/opt/tomcat/shared/lib。查看/opt/tomcat/conf/catalina.properties文件中的shared.loader行,了解共享库类路径的位置。我的看起来是这样的:
shared.loader=\
${catalina.home}/shared/lib\*.jar,${catalina.home}/shared/lib我还将这个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能够看到jar中的代码并进行编译。然后,我在我的两个测试应用程序中的pom.xml文件中引用了这个jar文件的副本:
<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>将其添加到pom.xml文件后,我右键单击每个项目,选择Maven ->更新项目.,然后右击每个项目并选择‘->’。我学到的非常重要的一点是,不要将JCOConnector.jar的副本直接添加到我的任何测试项目中。之所以这样做是因为我希望使用/opt/tomcat/shared/lib/JCOConnector.jar中jar文件中的代码。然后,我构建并部署了每个测试应用程序到tomcat服务器。
在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();
}调用我的JCOConnector.jar共享库的第二个测试应用程序中的代码如下所示:
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,我忽略了在您的工作站和服务器上安装SAP 3库所涉及的许多步骤。我确实希望这至少能帮助另外一个人克服尝试在同一服务器上与SAP进行多个spring java扩展的困难。
https://stackoverflow.com/questions/39612348
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