2014-05-23 2014-05-12 如何於 java 環境中透過取得系統名稱？(RtvNetA.java)

如何於 java 環境中透過取得系統名稱？(RtvNetA.java)

RtvNetA.java -- Retrieve Network Attributes 

於 CLP 中可執行 RTVNETA SYSNAME(&SYSNAME)，於 java 需要呼叫 API　QWCRNETA 來完成。


RtvNetA.java        



/* ==================================================================*/
/*                                                                   */
/*  Program . . : RtvNetA.java                                       */
/*  Description : Retrieve Network Attributes                        */
/*  Author  . . : Vengoal Chang                                      */
/*  Published . : AS400ePaper                                        */
/*  Date  . . . : May 23, 2014                                       */
/*                                                                   */
/* ==================================================================*/

package com.free400.vengoal.as400api;

import com.ibm.as400.access.AS400;
import com.ibm.as400.access.AS400Bin4;
import com.ibm.as400.access.AS400Exception;
import com.ibm.as400.access.AS400Text;
import com.ibm.as400.access.CharConverter;
import com.ibm.as400.access.ErrorCodeParameter;
import com.ibm.as400.access.ProgramCall;
import com.ibm.as400.access.ProgramParameter;

public class RtvNetA {
	
	private AS400 as400;
	private final AS400Bin4 intConverter_ = new AS400Bin4();
	
	public static final String NETATR_ALRBCKFP = "ALRBCKFP";
	public static final String NETATR_ALRCTLD = "ALRCTLD";
	public static final String NETATR_ALRDFTFP = "ALRDFTFP";
	public static final String NETATR_ALRFTR = "ALRFTR";
	public static final String NETATR_ALRHLDCNT = "ALRHLDCNT";
	public static final String NETATR_ALRLOGSTS = "ALRLOGSTS";
	public static final String NETATR_ALRPRIFP = "ALRPRIFP";
	public static final String NETATR_ALRRQSFP = "ALRRQSFP";
	public static final String NETATR_ALRSTS = "ALRSTS";
	public static final String NETATR_ALWADDCLU = "ALWADDCLU";
	public static final String NETATR_ALWANYNET = "ALWANYNET";
	public static final String NETATR_ALWHPRTWR = "ALWHPRTWR";
	public static final String NETATR_ALWVRTAPPN = "ALWVRTAPPN";
	public static final String NETATR_VRTAUTODEV = "VRTAUTODEV";
	public static final String NETATR_DDMACC = "DDMACC";
	public static final String NETATR_DFTCNNLST = "DFTCNNLST";
	public static final String NETATR_DFTMODE = "DFTMODE";
	public static final String NETATR_DFTNETTYPE = "DFTNETTYPE";
	public static final String NETATR_DTACPR = "DTACPR";
	public static final String NETATR_DTACPRINM = "DTACPRINM";
	public static final String NETATR_HPRPTHTMR = "HPRPTHTMR";
	public static final String NETATR_JOBACN = "JOBACN";
	public static final String NETATR_LCLCPNAME = "LCLCPNAME";
	public static final String NETATR_LCLLOCNAME = "LCLLOCNAME";
	public static final String NETATR_LCLNETID = "LCLNETID";
	public static final String NETATR_MAXINTSSN = "MAXINTSSN";
	public static final String NETATR_MAXHOP = "MAXHOP";
	public static final String NETATR_MDMCNTRYID = "MDMCNTRYID";
	public static final String NETATR_MSGQ = "MSGQ";
	public static final String NETATR_NETSERVER = "NETSERVER";
	public static final String NETATR_NODETYPE = "NODETYPE";
	public static final String NETATR_NWSDOMAIN = "NWSDOMAIN";
	public static final String NETATR_OUTQ = "OUTQ";
	public static final String NETATR_PNDSYSNAME = "PNDSYSNAME";
	public static final String NETATR_PCSACC = "PCSACC";
	public static final String NETATR_RAR = "RAR";
	public static final String NETATR_SYSNAME = "SYSNAME";
	
	public RtvNetA(AS400 as400){
		this.as400 = as400;
	}
	
	public String getNetAtr(String attribute) throws Exception{
		String[] atrs = new String[1];
		atrs[0] = attribute;
		String[] rtnAtrs =  getNetAtr(atrs);
		return rtnAtrs[0];
	}
	
	public String[] getNetAtr(String[] attributes)	throws Exception {
		final CharConverter charConverter = new CharConverter(as400.getCcsid(), as400);
		String[] rtnStr = new String[attributes.length];		
		
		ProgramParameter[] parameters = buildProgramParameters(attributes);
		ProgramCall rtvNetAtr = new ProgramCall(as400, "/QSYS.LIB/QWCRNETA.PGM", parameters);

		if (rtvNetAtr.run() != true) {
			throw new AS400Exception(rtvNetAtr.getMessageList());
		} else {
			byte[] rcvVar = parameters[0].getOutputData();
			Integer nbrOfAtrRtn = (Integer) intConverter_.toObject(rcvVar, 0);
			int offsetOfNetAtrInfoTable = 0;
			int offset;
			String netAtr, typeOfData, infoStatus;
			int lenOfData;
			Object atrValue = null;
			for (int i = 0; i < nbrOfAtrRtn; i++) {
				offsetOfNetAtrInfoTable += 4;
				offset =  intConverter_.toInt(rcvVar, offsetOfNetAtrInfoTable);
				netAtr =  charConverter.byteArrayToString(rcvVar, offset, 10);
				offset += 10;
				typeOfData =  charConverter.byteArrayToString(rcvVar, offset, 1);
				offset += 1;
				infoStatus =  charConverter.byteArrayToString(rcvVar, offset, 1);
				offset += 1;
				lenOfData = intConverter_.toInt(rcvVar, offset);
				offset += 4;
				if (typeOfData.equalsIgnoreCase("C")) {
					atrValue = charConverter.byteArrayToString(rcvVar, offset,	lenOfData).trim();
					rtnStr[i] = (String) atrValue;
				} else if (typeOfData.equalsIgnoreCase("B")) {
					atrValue = intConverter_.toInt(rcvVar, offset);
					rtnStr[i] = Integer.toString((Integer) atrValue);
				}
				// System.out.println(netAtr + "=" + atrValue);
			}
		}
		return rtnStr;
	}
	
	private ProgramParameter[] buildProgramParameters(String[] attributes) {
		
		ProgramParameter[] parameterList = new ProgramParameter[5];
		parameterList[0] = new ProgramParameter(2048);
		parameterList[1] = new ProgramParameter(intConverter_.toBytes(2048));
		parameterList[2] = new ProgramParameter(intConverter_.toBytes(attributes.length));
		
		AS400Text text10 = new AS400Text(10, as400);
		byte[] atrNameBytes = new byte[attributes.length * 10];
		int atrNameOffset = 0;
		for (int i = 0; i < attributes.length; i++) {
			byte[] atrName = text10.toBytes(attributes[i]);
			System.arraycopy(atrName, 0, atrNameBytes, atrNameOffset, 10);
			atrNameOffset += 10;
		}
		
		parameterList[3] = new ProgramParameter(atrNameBytes);
		parameterList[4] = new ErrorCodeParameter();
		
		return parameterList;			
	}

	public static void main(String[] args) {
		
		try {
			AS400 as400 = new AS400("AS400IP", "USER", "PASS");
			RtvNetA rtvNetA = new RtvNetA(as400);
			String[] atrName = { RtvNetA.NETATR_SYSNAME };
			String[] rtnValues = rtvNetA.getNetAtr(atrName);
			for (int i = 0; i < rtnValues.length; i++) {
				System.out.println(atrName[i] + "=" + rtnValues[i]);
			}

			atrName[0] = RtvNetA.NETATR_MAXINTSSN;
			rtnValues = rtvNetA.getNetAtr(atrName);
			for (int i = 0; i < rtnValues.length; i++) {
				System.out.println(atrName[i] + "=" + rtnValues[i]);
			}

			String[] atrName2 = { RtvNetA.NETATR_DDMACC, RtvNetA.NETATR_MAXHOP };
			rtnValues = rtvNetA.getNetAtr(atrName2);
			for (int i = 0; i < rtnValues.length; i++) {
				System.out.println(atrName2[i] + "=" + rtnValues[i]);
			}
			
			System.out.println(NETATR_LCLNETID+ "=" + rtvNetA.getNetAtr(NETATR_LCLNETID));
			as400.disconnectAllServices();
			System.exit(0);
		} catch (Exception excp) {
			excp.printStackTrace();
		}
	}
}