How to Compress the XML Using GZIP in BPEL | Bas64 | SOA

Below is the Java embedding code in BPEL which will compress the XML using GZIP and convert it into Bas64 format. Compression ratio will be around 85%.

try {               
//Retrieve XML and Convert it to String           
    oracle.xml.parser.v2.XMLElement inputPayload = (oracle.xml.parser.v2.XMLElement)getVariableData("inputVariable","payload","/inputXML"); 
    oracle.xml.parser.v2.XMLDocument xmlPayload = inputPayload.getDocument();             
    java.io.ByteArrayOutputStream outputStream = new java.io.ByteArrayOutputStream();             
    xmlPayload.print(outputStream);             
    String inputstr = outputStream.toString();

//Compress the string using Gzip and Convert it to byte[]     
java.io.ByteArrayOutputStream bos = new java.io.ByteArrayOutputStream(inputstr.length());   
java.util.zip.GZIPOutputStream gzip = new java.util.zip.GZIPOutputStream(bos);         
gzip.write(inputstr.getBytes());         
gzip.close();         
byte[] compressed = bos.toByteArray();         
        bos.toByteArray();         
bos.close();         

//Convert the Gzip to Base64 Format           
  oracle.soa.common.util.Base64Encoder encoder = new oracle.soa.common.util.Base64Encoder();                   
  java.lang.String encodedString = null;                   
  encodedString = encoder.encode(compressed);             
   
//Assign it to Invoke variable           
  setVariableData("Invoke_TargetSystem_InputVariable", "Parameters", "/request/paylaod", encodedString);       
   
} catch (Exception e) {                   
  addAuditTrailEntry(e);                   
}

To learn how to decompress, please use below link.
How to decompress xml from base64|GZIP