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package org.openecomp.policy.utils;
import java.util.List;
import java.util.Properties;
import com.att.nsa.mr.client.impl.MRConsumerImpl;
import com.att.nsa.mr.test.clients.ProtocolTypeConstants;
public interface BusConsumer {
/**
* fetch messages
*
* @return list of messages
* @throws Exception when error encountered by underlying libraries
*/
public Iterable<String> fetch() throws Exception;
/**
* close underlying library consumer
*/
public void close();
/**
* MR based consumer
*/
public static class DmaapConsumerWrapper implements BusConsumer {
/**
* MR Consumer
*/
protected MRConsumerImpl consumer;
/**
* MR Consumer Wrapper
*
* @param servers messaging bus hosts
* @param topic topic
* @param apiKey API Key
* @param apiSecret API Secret
* @param aafLogin AAF Login
* @param aafPassword AAF Password
* @param consumerGroup Consumer Group
* @param consumerInstance Consumer Instance
* @param fetchTimeout Fetch Timeout
* @param fetchLimit Fetch Limit
*/
public DmaapConsumerWrapper(List<String> servers, String topic,
String aafLogin, String aafPassword,
String consumerGroup, String consumerInstance,
int fetchTimeout, int fetchLimit)
throws Exception {
this.consumer = new MRConsumerImpl(servers, topic,
consumerGroup, consumerInstance,
fetchTimeout, fetchLimit,
null, aafLogin, aafPassword);
this.consumer.setUsername(aafLogin);
this.consumer.setPassword(aafPassword);
this.consumer.setProtocolFlag(ProtocolTypeConstants.AAF_AUTH.getValue());
Properties props = new Properties();
props.setProperty("Protocol", "http");
this.consumer.setProps(props);
this.consumer.setHost(servers.get(0) + ":3904");
}
/**
* {@inheritDoc}
*/
public Iterable<String> fetch() throws Exception {
return this.consumer.fetch();
}
/**
* {@inheritDoc}
*/
public void close() {
this.consumer.close();
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.
append("DmaapConsumerWrapper [").
append("consumer.getAuthDate()=").append(consumer.getAuthDate()).
append(", consumer.getAuthKey()=").append(consumer.getAuthKey()).
append(", consumer.getHost()=").append(consumer.getHost()).
append(", consumer.getProtocolFlag()=").append(consumer.getProtocolFlag()).
append(", consumer.getUsername()=").append(consumer.getUsername()).
append("]");
return builder.toString();
}
}
}
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