SAP JCO3 官网代码解读 sap call java server

自己从网上把自己的代码拷回来，文章时间大约是2017年。

SAP JCO版本 3.0.18, 官网例子代码文件 StepByStepServer.java，保留其中第4个例子函数，实现sap call java server.

/* 第一步，SAP系统中,rz10里面参数gw/acl_mode的值要0才可以，运行SM59有注册网关服务。
/* 第二步，SAP系统中，SE37里面定义一个远程调用的函数JCO_SET_TRACE。
FUNCTION JCO_SET_TRACE.
*"----------------------------------------------------------------------
*"*"局部接口：
*" IMPORTING
*" VALUE(TRACE_LEVEL) TYPE SY-LISEL
*" VALUE(TRACE_PATH) TYPE SY-LISEL
*"----------------------------------------------------------------------
ENDFUNCTION.

第三步，SE38里面做一个程序来调用这个远程的function
REPORT ZTEST_JCO_SET_TRACE.
DATA trace_level TYPE N.
DATA trace_path TYPE STRING.

DATA msg(255) TYPE C.

trace_level = '555555555'.
trace_path = '33333333333333.'.

CALL FUNCTION 'JCO_SET_TRACE' destination 'JCO_SERVER'
EXPORTING
TRACE_LEVEL = trace_level
TRACE_PATH = trace_path
EXCEPTIONS
COMMUNICATION_FAILURE = 1
SYSTEM_FAILURE = 2 MESSAGE msg
RESOURCE_FAILURE = 3
OTHERS = 4
.
IF SY-SUBRC <> 0.
write: 'ERROR: ', SY-SUBRC, msg.
ENDIF.

第四点，SM59中NCO连接项目里面，有一个“注册的服务器程序，程序标识【】”，需要同程序配置文件中，server参数中的PROGRAM_ID一致。这个程序名称，还可以在SMGW中的登陆客户端信息中看到。

在DEV系统测试通过，先放上代码，有空再来仔细解读。

import java.util.Hashtable;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.CountDownLatch;
import java.io.File;
import java.io.FileOutputStream;import com.sap.conn.jco.AbapException;
import com.sap.conn.jco.JCoContext;
import com.sap.conn.jco.JCoDestination;
import com.sap.conn.jco.JCoDestinationManager;
import com.sap.conn.jco.JCoException;
import com.sap.conn.jco.JCoField;
import com.sap.conn.jco.JCoFunction;
import com.sap.conn.jco.JCoFunctionTemplate;
import com.sap.conn.jco.JCoStructure;
import com.sap.conn.jco.JCoTable;
import com.sap.conn.jco.JCo;
import com.sap.conn.jco.JCoCustomRepository;
import com.sap.conn.jco.JCoListMetaData;
import com.sap.conn.jco.JCoMetaData;import com.sap.conn.jco.ext.DestinationDataProvider;
import com.sap.conn.jco.ext.ServerDataProvider;import com.sap.conn.jco.server.DefaultServerHandlerFactory;
import com.sap.conn.jco.server.JCoServer;
import com.sap.conn.jco.server.JCoServerContext;
import com.sap.conn.jco.server.JCoServerContextInfo;
import com.sap.conn.jco.server.JCoServerErrorListener;
import com.sap.conn.jco.server.JCoServerExceptionListener;
import com.sap.conn.jco.server.JCoServerFactory;
import com.sap.conn.jco.server.JCoServerFunctionHandler;
import com.sap.conn.jco.server.JCoServerState;
import com.sap.conn.jco.server.JCoServerStateChangedListener;
import com.sap.conn.jco.server.JCoServerTIDHandler;public class StepByStepServer
{static String SERVER_NAME1 = "SERVER";static String DESTINATION_NAME1 = "ABAP_AS_WITHOUT_POOL";static String DESTINATION_NAME2 = "ABAP_AS_WITH_POOL";static  {Properties connectProperties = new Properties();connectProperties.setProperty(DestinationDataProvider.JCO_ASHOST,"10.0.3.51");connectProperties.setProperty(DestinationDataProvider.JCO_SYSNR,"00");connectProperties.setProperty(DestinationDataProvider.JCO_CLIENT,"100");connectProperties.setProperty(DestinationDataProvider.JCO_USER,"60489");connectProperties.setProperty(DestinationDataProvider.JCO_PASSWD,"********");connectProperties.setProperty(DestinationDataProvider.JCO_LANG,"ZH");createDataFile(DESTINATION_NAME1, "jcoDestination",connectProperties);connectProperties.setProperty(DestinationDataProvider.JCO_POOL_CAPACITY, "3");connectProperties.setProperty(DestinationDataProvider.JCO_PEAK_LIMIT, "10");createDataFile(DESTINATION_NAME2, "jcoDestination",connectProperties);Properties servertProperties = new Properties();servertProperties.setProperty(ServerDataProvider.JCO_GWHOST,"10.0.3.51");servertProperties.setProperty(ServerDataProvider.JCO_GWSERV,"3300");servertProperties.setProperty(ServerDataProvider.JCO_PROGID,"JCO_SERVER");servertProperties.setProperty(ServerDataProvider.JCO_REP_DEST,"ABAP_AS_WITH_POOL");servertProperties.setProperty(ServerDataProvider.JCO_CONNECTION_COUNT, "2");createDataFile(SERVER_NAME1, "jcoServer",servertProperties);}static void createDataFile(String name, String suffix, Properties properties){File cfg = new File(name+"."+suffix);if(!cfg.exists()){ try{FileOutputStream fos = new FileOutputStream(cfg,false);properties.store(fos, "for tests only !");fos.close();}catch (Exception e){throw new RuntimeException("Unable to create thedestination file " + cfg.getName(), e);}}} /*** The following server example demonstrates how to develop a function module available only on Java side. At first* we create the respective function meta data, because the function is not available in ABAP DDIC. Then the function* meta data is stored in a custom repository which is registered with the server instance. Naturally we also* need the implementation of the function - see the class SetTraceHandler. * * Last but not least, the following ABAP report invokes the function module SetTraceHandler.REPORT  ZTEST_JCO_SET_TRACE.DATA trace_level TYPE N.DATA trace_path TYPE STRING.DATA msg(255) TYPE C.trace_level = '5'.trace_path = '.'.CALL FUNCTION 'JCO_SET_TRACE' destination 'JCO_SERVER'EXPORTINGTRACE_LEVEL = trace_levelTRACE_PATH = trace_pathEXCEPTIONSCOMMUNICATION_FAILURE       = 1SYSTEM_FAILURE              = 2 MESSAGE msgRESOURCE_FAILURE            = 3OTHERS                      = 4.IF SY-SUBRC <> 0.write: 'ERROR: ',  SY-SUBRC, msg.ENDIF.     */static class MyFunction implements JCoServerFunctionHandler{public void handleRequest(JCoServerContext serverCtx, JCoFunction function){int level = function.getImportParameterList().getInt("TRACE_LEVEL");String path = function.getImportParameterList().getString("TRACE_PATH");System.out.println("A:" + level + " B:"+ path);//  JCo.setTrace(level, path);}}    public static void main(String[] a){JCoListMetaData impList = JCo.createListMetaData("IMPORTS");impList.add("TRACE_LEVEL", JCoMetaData.TYPE_NUM, 1, 2, 0, null, null, JCoListMetaData.IMPORT_PARAMETER, null, null);impList.add("TRACE_PATH", JCoMetaData.TYPE_STRING, 8, 8, 0, null, null, JCoListMetaData.IMPORT_PARAMETER, null, null);impList.lock();JCoFunctionTemplate fT = JCo.createFunctionTemplate("JCO_SET_TRACE", impList, null, null, null, null);JCoCustomRepository cR = JCo.createCustomRepository("MyCustomRepository");cR.addFunctionTemplateToCache(fT); //Repository add FunctionTemplateJCoServer server ;try{server = JCoServerFactory.getServer(SERVER_NAME1); //create server}catch(JCoException ex){throw new RuntimeException("Unable to create the server " + SERVER_NAME1 + " because of " + ex.getMessage(), ex);}String repDest = server.getRepositoryDestination();System.out.println("repDest:"+ repDest);if(repDest!=null){try{cR.setDestination(JCoDestinationManager.getDestination(repDest)); //Repository setDestination}catch (JCoException e) {               }}server.setRepository(cR); //server add RepositoryJCoServerFunctionHandler myf = new MyFunction();DefaultServerHandlerFactory.FunctionHandlerFactory factory = new DefaultServerHandlerFactory.FunctionHandlerFactory();factory.registerHandler(fT.getName(), myf);server.setCallHandlerFactory(factory);server.start();System.out.println("The program can be stoped using <ctrl>+<c>");}
}

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