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/*******************************************************************************
* ============LICENSE_START=======================================================
* org.onap.dmaap
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
*
*******************************************************************************/
package com.att.nsa.mr.tools;
import java.io.IOException;
import java.io.PrintStream;
import java.util.List;
import java.util.concurrent.TimeUnit;
import com.att.nsa.cmdtool.Command;
import com.att.nsa.cmdtool.CommandNotReadyException;
import com.att.nsa.mr.client.MRBatchingPublisher;
import com.att.nsa.mr.client.MRClientFactory;
import com.att.nsa.mr.client.MRConsumer;
import com.att.nsa.mr.client.MRClientBuilders.PublisherBuilder;
import com.att.nsa.mr.client.MRPublisher.message;
public class MessageCommand implements Command<MRCommandContext>
{
@Override
public String[] getMatches ()
{
return new String[]{
"(post) (\\S*) (\\S*) (.*)",
"(read) (\\S*) (\\S*) (\\S*)",
};
}
@Override
public void checkReady ( MRCommandContext context ) throws CommandNotReadyException
{
if ( !context.checkClusterReady () )
{
throw new CommandNotReadyException ( "Use 'cluster' to specify a cluster to use." );
}
}
@Override
public void execute ( String[] parts, MRCommandContext context, PrintStream out ) throws CommandNotReadyException
{
if ( parts[0].equalsIgnoreCase ( "read" ))
{
final MRConsumer cc = MRClientFactory.createConsumer ( context.getCluster (), parts[1], parts[2], parts[3],
-1, -1, null, context.getApiKey(), context.getApiPwd() );
context.applyTracer ( cc );
try
{
for ( String msg : cc.fetch () )
{
out.println ( msg );
}
}
catch ( Exception e )
{
out.println ( "Problem fetching messages: " + e.getMessage() );
}
finally
{
cc.close ();
}
}
else
{
final MRBatchingPublisher pub = new PublisherBuilder ().
usingHosts ( context.getCluster () ).
onTopic ( parts[1] ).
authenticatedBy ( context.getApiKey(), context.getApiPwd() ).
build ()
;
try
{
pub.send ( parts[2], parts[3] );
}
catch ( IOException e )
{
out.println ( "Problem sending message: " + e.getMessage() );
}
finally
{
List<message> left = null;
try
{
left = pub.close ( 500, TimeUnit.MILLISECONDS );
}
catch ( IOException e )
{
out.println ( "Problem sending message: " + e.getMessage() );
}
catch ( InterruptedException e )
{
out.println ( "Problem sending message: " + e.getMessage() );
}
if ( left != null && left.size () > 0 )
{
out.println ( left.size() + " messages not sent." );
}
}
}
}
@Override
public void displayHelp ( PrintStream out )
{
out.println ( "post <topicName> <partition> <message>" );
out.println ( "read <topicName> <consumerGroup> <consumerId>" );
}
}
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