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package efficient_handler.common;
import com.sun.xml.ws.api.handler.MessageHandlerContext;
import com.sun.xml.ws.api.handler.MessageHandler;
import com.sun.xml.ws.api.message.Message;
import com.sun.xml.ws.api.streaming.XMLStreamWriterFactory;
import javax.xml.namespace.QName;
import javax.xml.ws.handler.MessageContext;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.stream.XMLStreamException;
import java.io.PrintStream;
import java.util.Set;
import java.lang.reflect.Constructor;
/*
* This simple LoggingHandler will log the contents of incoming
* and outgoing messages. This is implemented as a MessageHandler
* for better performance over SOAPHandler.
*
* @author Rama Pulavarthi
*/
public class LoggingHandler implements MessageHandler<MessageHandlerContext> {
// change this to redirect output if desired
private static PrintStream out = System.out;
public Set<QName> getHeaders() {
return null;
}
public boolean handleMessage(MessageHandlerContext mhc) {
logToSystemOut(mhc);
return true;
}
public boolean handleFault(MessageHandlerContext mhc) {
logToSystemOut(mhc);
return true;
}
// nothing to clean up
public void close(MessageContext messageContext) {
}
/**
* Check the MESSAGE_OUTBOUND_PROPERTY in the context
* to see if this is an outgoing or incoming message.
* Writes the message to the OutputStream.
*/
private void logToSystemOut(MessageHandlerContext mhc) {
Boolean outboundProperty = (Boolean)
mhc.get(MessageContext.MESSAGE_OUTBOUND_PROPERTY);
if (outboundProperty.booleanValue()) {
out.println("\nOutbound message:");
} else {
out.println("\nInbound message:");
}
Message m = mhc.getMessage().copy();
XMLStreamWriter writer = XMLStreamWriterFactory.create(System.out);
try {
m.writeTo(createIndenter(writer));
} catch (XMLStreamException e) {
e.printStackTrace();
}
out.println("");
}
/**
* Wraps {@link XMLStreamWriter} by an indentation engine if possible.
*
* <p>
* We can do this only when we have <tt>stax-utils.jar</tt> in the classpath.
*/
private XMLStreamWriter createIndenter(XMLStreamWriter writer) {
try {
Class clazz = getClass().getClassLoader().loadClass("javanet.staxutils.IndentingXMLStreamWriter");
Constructor c = clazz.getConstructor(XMLStreamWriter.class);
writer = (XMLStreamWriter)c.newInstance(writer);
} catch (Exception e) {
// if stax-utils.jar is not in the classpath, this will fail
// so, we'll just have to do without indentation
out.println("WARNING: put stax-utils.jar to the classpath to indent the dump output");
}
return writer;
}
}