Here you'll find a module I wrote to zip and unzip messages using gzip. I hope you find it useful:
| PayloadGZipBean |
|---|
package com.integrations.adapter.module;
import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.rmi.RemoteException; import java.util.zip.GZIPInputStream; import java.util.zip.GZIPOutputStream;
import javax.ejb.EJBException; import javax.ejb.SessionBean; import javax.ejb.SessionContext; import javax.ejb.TimedObject; import javax.ejb.Timer;
import com.sap.aii.af.lib.mp.module.ModuleContext; import com.sap.aii.af.lib.mp.module.ModuleData; import com.sap.aii.af.lib.mp.module.ModuleException; import com.sap.aii.af.service.auditlog.Audit; import com.sap.engine.interfaces.messaging.api.Message; import com.sap.engine.interfaces.messaging.api.MessageKey; import com.sap.engine.interfaces.messaging.api.auditlog.AuditLogStatus; /** * @author Roger Allué i Vall * */ public class PayloadGZipBean implements SessionBean, TimedObject { private static final String C_PARAM_MODE = "zip.mode"; private static final String C_MODE_ZIP = "zip"; private static final String C_MODE_UNZIP = "unzip"; private static final int C_BUFFER_SIZE = 8192; private static MessageKey amk; /* (non-Javadoc) * @see javax.ejb.SessionBean#ejbActivate() */ @Override public void ejbActivate() throws EJBException, RemoteException { // TODO Auto-generated method stub } /* (non-Javadoc) * @see javax.ejb.SessionBean#ejbPassivate() */ @Override public void ejbPassivate() throws EJBException, RemoteException { // TODO Auto-generated method stub } /* (non-Javadoc) * @see javax.ejb.SessionBean#ejbRemove() */ @Override public void ejbRemove() throws EJBException, RemoteException { // TODO Auto-generated method stub } /* (non-Javadoc) * @see javax.ejb.SessionBean#setSessionContext(javax.ejb.SessionContext) */ @Override public void setSessionContext(SessionContext arg0) throws EJBException, RemoteException { // TODO Auto-generated method stub } /* (non-Javadoc) * @see javax.ejb.TimedObject#ejbTimeout(javax.ejb.Timer) */ @Override public void ejbTimeout(Timer arg0) { // TODO Auto-generated method stub } public void ejbCreate() throws javax.ejb.CreateException { } public ModuleData process(ModuleContext moduleContext, ModuleData inputModuleData) throws ModuleException { Message msg; ByteArrayInputStream payloadIn; ByteArrayOutputStream payloadOut; try { msg = (Message) inputModuleData.getPrincipalData(); amk = new MessageKey(msg.getMessageId(), msg.getMessageDirection()); addInfo("PayloadGZipBean Begin..."); addInfo("Payload initialization"); payloadIn = new ByteArrayInputStream(msg.getDocument().getContent()); payloadOut = new ByteArrayOutputStream(); addInfo("Getting " + C_PARAM_MODE + " from parameters"); String mode = moduleContext.getContextData(C_PARAM_MODE); if (mode!=null && mode.equals(C_MODE_ZIP)){ addInfo("zip.mode from parameters"); addInfo(C_PARAM_MODE + " found: " + C_MODE_ZIP); compress(payloadIn,payloadOut); addInfo("PayloadGZipBean: Payload successfully zipped"); }else if (mode!=null && mode.equals(C_MODE_UNZIP)){ addInfo(C_PARAM_MODE + " found: " + C_MODE_UNZIP); uncompress(payloadIn,payloadOut); addInfo("PayloadGZipBean: Payload successfully unzipped"); }else{ } msg.getDocument().setContent(payloadOut.toByteArray()); inputModuleData.setPrincipalData(msg); } catch (Exception e) { ModuleException me = new ModuleException(e); throw me; } addInfo("PayloadGZipBean End..."); return inputModuleData; } private void compress(InputStream in, OutputStream out) throws ModuleException{ try { GZIPOutputStream goutstream = new GZIPOutputStream(out); byte[] buf = new byte[C_BUFFER_SIZE]; int len; while ((len = in.read(buf)) > 0) { goutstream.write(buf, 0, len); } } catch (IOException e) { addError("Compress: Exception found!"); ModuleException me = new ModuleException(e); throw me; } } private void uncompress(InputStream in, OutputStream out) throws ModuleException{ try { GZIPInputStream ginstream = new GZIPInputStream(in); byte[] buf = new byte[C_BUFFER_SIZE]; int len; while ((len = ginstream.read(buf)) > 0) { out.write(buf, 0, len); } } catch (IOException e) { addError("Uncompress: Exception found!"); ModuleException me = new ModuleException(e); throw me; } } private void addInfo (String msg){ try{ Audit.addAuditLogEntry(amk, AuditLogStatus.SUCCESS,msg); } catch (Exception e){ Audit.addAuditLogEntry(amk, AuditLogStatus.ERROR,"Error a l'obrir el fitxer!"); } } private void addWarning (String msg){ try{ Audit.addAuditLogEntry(amk, AuditLogStatus.WARNING,msg); } catch (Exception e){ Audit.addAuditLogEntry(amk, AuditLogStatus.ERROR,"Error a l'obrir el fitxer!"); } } private void addError (String msg){ try{ Audit.addAuditLogEntry(amk, AuditLogStatus.ERROR,msg); } catch (Exception e){ Audit.addAuditLogEntry(amk, AuditLogStatus.ERROR,"Error a l'obrir el fitxer!"); } } } |
Regards!