com.wombat.mama.examples.MamaSubscriberJava Maven / Gradle / Ivy
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OpenMAMA is a high performance vendor neutral lightweight wrapper that provides a common API interface to different middleware and messaging solutions across a variety of platforms and languages.
/* $Id$
*
* OpenMAMA: The open middleware agnostic messaging API
* Copyright (C) 2011 NYSE Technologies, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
package com.wombat.mama.examples;
import com.wombat.mama.*;
import com.wombat.common.WombatException;
import java.util.Iterator;
import java.util.logging.Logger;
import java.util.logging.Level;
/**
* This sample application demonstrates how to send mamaMsg's from an inbox,
* and receive the reply.
*
* It accepts the following command line arguments:
* [-s topic] The topic to which to subscribe. Default value
* is "MAMA_INBOUND_TOPIC".
* [-tport name] The transport parameters to be used from
* mama.properties.
* [-q] Quiet mode. Suppress output.
*
*/
public class MamaSubscriberJava
{
private static MamaTransport myTransport = null;
private static MamaBasicSubscription mySubscription = null;
private static MamaBridge myBridge = null;
private static MamaQueue myDefaultQueue = null;
private static String myMiddleware = "wmw";
private static String myTopic = "MAMA_TOPIC";
private static String myTransportName = null;
private static int myQuietLevel = 0;
private static final Logger logger =
Logger.getLogger( "com.wombat.mama" );
private static Level myLogLevel;
public static void main( String [] args ) throws InterruptedException
{
parseCommandLine( args );
initializeMama();
createSubscriber();
Mama.start (myBridge);
synchronized (MamaSubscriberJava.class)
{
MamaSubscriberJava.class.wait();
}
mySubscription.destroy();
myTransport.destroy();
Mama.close();
}
/*Class for processing fields within a message - for the message
* iterator*/
private static class FieldIterator implements MamaMsgFieldIterator
{
public void onField (MamaMsg msg,
MamaMsgField field,
MamaDictionary dictionary,
Object closure)
{
try
{
print (field.getName(),20);
print (" | ", 0);
print ("" + field.getFid(),4);
print (" | ", 0);
print ("" + field.getTypeName(),10);
print (" | ", 0);
printFromField (field);
// if it was a VECTOR_MSG field, we've already 'newlined'
if (field.getType() != MamaFieldDescriptor.VECTOR_MSG)
print (" \n ", 0);
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
/*Access the data from the field objects*/
private void printFromField (MamaMsgField field)
{
short fieldType = field.getType ();
switch (fieldType)
{
case MamaFieldDescriptor.BOOL:
print ("" + field.getBoolean(), 20);
break;
case MamaFieldDescriptor.CHAR:
print ("" + field.getChar(), 20);
break;
case MamaFieldDescriptor.I8:
print ("" + field.getI8(), 20);
break;
case MamaFieldDescriptor.U8:
print ("" + field.getU8(), 20);
break;
case MamaFieldDescriptor.I16:
print ("" + field.getI16(), 20);
break;
case MamaFieldDescriptor.U16:
print ("" + field.getU16(), 20);
break;
case MamaFieldDescriptor.I32:
print ("" + field.getI32(), 20);
break;
case MamaFieldDescriptor.U32:
print ("" + field.getU32(), 20);
break;
case MamaFieldDescriptor.I64:
print ("" + field.getI64(), 20);
break;
case MamaFieldDescriptor.U64:
print ("" + field.getU64(), 20);
break;
case MamaFieldDescriptor.F32:
print ("" + field.getF32(), 20);
break;
case MamaFieldDescriptor.F64:
print ("" + field.getF64(), 20);
break;
case MamaFieldDescriptor.STRING:
print (field.getString(), 20);
break;
case MamaFieldDescriptor.TIME:
print ("" + field.getDateTime (), 20);
break;
case MamaFieldDescriptor.PRICE:
print ("" + field.getPrice (), 20);
break;
default:
print ("Unknown type: " + fieldType, 20);
}
}
/*Access the data from the message object - random access*/
private void printFromMessage (MamaMsg msg, MamaMsgField field)
{
short fieldType = field.getType();
switch (fieldType)
{
case MamaFieldDescriptor.BOOL:
print ("" + msg.getBoolean(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.CHAR:
print ("" + msg.getChar(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.I8:
print ("" + msg.getI8(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.U8:
print ("" + msg.getU8(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.I16:
print ("" + msg.getI16(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.U16:
print ("" + msg.getU16(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.I32:
print ("" + msg.getI32(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.U32:
print ("" + msg.getU32(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.I64:
print ("" + msg.getI64(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.U64:
print ("" + msg.getU64(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.F32:
print ("" + msg.getF32(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.F64:
print ("" + msg.getF64(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.STRING:
print ("" + msg.getString(field.getName(),
field.getFid()), 20);
break;
case MamaFieldDescriptor.TIME:
print ("" + msg.getDateTime (field.getName (),
field.getFid ()), 20);
break;
case MamaFieldDescriptor.PRICE:
print ("" + msg.getPrice (field.getName (),
field.getFid ()), 20);
break;
default:
print ("Unknown type: " + fieldType, 20);
}
return;
}
}
private static void initializeMama( )
{
try
{
myBridge = Mama.loadBridge (myMiddleware);
Mama.open();
myDefaultQueue = Mama.getDefaultQueue (myBridge);
myTransport = new MamaTransport ();
myTransport.create (myTransportName, myBridge);
}
catch( WombatException e )
{
e.printStackTrace( );
System.err.println( "Error initializing mama: " + e );
System.exit(1);
}
}
private static void createSubscriber( )
{
try
{
MamaBasicSubscription subsc = new MamaBasicSubscription ();
subsc.createBasicSubscription(
new SubscriptionCallback(),
myTransport,
myDefaultQueue,
myTopic,
null );
}
catch( WombatException e )
{
e.printStackTrace( );
System.err.println( "Error creating subscription: " + e );
System.exit(1);
}
}
private static void parseCommandLine( String [] args )
{
for ( int i = 0; i < args.length; )
{
String arg = args[ i ];
if( "-s".equals( arg ) )
{
myTopic = args[i+1];
i += 2;
}
else if( "-tport".equals( arg ) )
{
myTransportName = args[i+1];
i += 2;
}
else if( "-q".equals( arg ) )
{
myQuietLevel++;
i++;
}
else if ( "-m".equals( arg ))
{
myMiddleware = args[i+1];
i += 2;
}
else if (args[i].equals ("-v"))
{
myLogLevel = myLogLevel == null
? Level.FINE : myLogLevel == Level.FINE
? Level.FINER : Level.FINEST;
Mama.enableLogging (myLogLevel);
i++;
}
else
{
i++;
}
}
if( myQuietLevel < 2 )
{
System.out.println(
"Starting Publisher with:\n" +
" middleware: " + myMiddleware + "\n" +
" topic: " + myTopic + "\n" +
" transport: " + myTransportName + "\n" );
}
}
private static void print (final String what, final int width)
{
int whatLength = 0;
if (what!=null)
whatLength = what.length();
StringBuffer sb = new StringBuffer(what);
final int spaces = width - whatLength;
for(int i = 0; i < spaces; i++)
sb.append(" ");
System.out.print(sb.toString());
System.out.flush();
}
private static class SubscriptionCallback
implements MamaBasicSubscriptionCallback
{
public void onCreate( MamaBasicSubscription subscription )
{
if( myQuietLevel < 2 )
{
mySubscription = subscription;
System.out.println( "Created inbound subscription.\n" );
}
}
public void onError( MamaBasicSubscription subscription,
short status,
int platformError,
String subject )
{
System.out.println( "Error creating subscriptionBridge: %s\n" + status );
System.exit(1);
}
public void onMsg(MamaBasicSubscription subscription, MamaMsg msg)
{
if( myQuietLevel < 2 )
{
System.out.println ("Reveived msg: Topic=" +
msg.getString ("PublisherTopic",10002) +
", Sequence Nunber="+msg.getU32 ("MdSeqNum", 10001));
System.out.println("Received msg:");
displayAllFields(msg);
}
}
public void onDestroy (MamaBasicSubscription subscription)
{
System.out.println("Subscription destroyed\n");
}
private synchronized void displayAllFields(final MamaMsg msg)
{
msg.iterateFields(new FieldIterator(), null, "Closure");
}
private void displayMamaMsgField (MamaMsgField field)
{
short fieldType = field.getType ();
switch (fieldType)
{
case MamaFieldDescriptor.BOOL:
print ("" + field.getBoolean(), 20);
break;
case MamaFieldDescriptor.CHAR:
print ("" + field.getChar(), 20);
break;
case MamaFieldDescriptor.I8:
print ("" + field.getI8(), 20);
break;
case MamaFieldDescriptor.U8:
print ("" + field.getU8(), 20);
break;
case MamaFieldDescriptor.I16:
print ("" + field.getI16(), 20);
break;
case MamaFieldDescriptor.U16:
print ("" + field.getU16(), 20);
break;
case MamaFieldDescriptor.I32:
print ("" + field.getI32(), 20);
break;
case MamaFieldDescriptor.U32:
print ("" + field.getU32(), 20);
break;
case MamaFieldDescriptor.I64:
print ("" + field.getI64(), 20);
break;
case MamaFieldDescriptor.U64:
print ("" + field.getU64(), 20);
break;
case MamaFieldDescriptor.F32:
print ("" + field.getF32(), 20);
break;
case MamaFieldDescriptor.F64:
print ("" + field.getF64(), 20);
break;
case MamaFieldDescriptor.STRING:
print (field.getString(), 20);
break;
case MamaFieldDescriptor.TIME:
print ("" + field.getDateTime (), 20);
break;
case MamaFieldDescriptor.PRICE:
print ("" + field.getPrice (), 20);
break;
case MamaFieldDescriptor.MSG:
System.out.println ("{ " );
displayAllFields(field.getMsg());
System.out.println ("}" );
break;
case MamaFieldDescriptor.VECTOR_MSG:
MamaMsg[] vMsgs = field.getArrayMsg();
for (int i =0; i!= vMsgs.length; i++)
{
System.out.println ("{ " );
displayAllFields (vMsgs[i]);
System.out.println ("}" );
}
;
break;
default:
print ("Unknown type: " + fieldType, 20);
}
}
}
}
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